[{"_id":"21820","ddc":["540"],"article_processing_charge":"No","language":[{"iso":"eng"}],"OA_type":"closed access","doi":"10.1021/acs.langmuir.1c00769","scopus_import":"1","intvolume":"        37","date_updated":"2026-05-11T07:52:30Z","issue":"33","publication_status":"published","status":"public","page":"9939-9951","extern":"1","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","oa_version":"None","type":"journal_article","title":"Influence of polarity change and photophysical effects on photosurfactant-driven wetting","publisher":"American Chemical Society","pmid":1,"publication_identifier":{"eissn":["1520-5827"],"issn":["0743-7463"]},"external_id":{"pmid":["34370465"]},"date_published":"2021-08-09T00:00:00Z","publication":"Langmuir","abstract":[{"text":"Photosurfactants have shown considerable promise for enabling stimuli-responsive control of the properties and motion of fluid interfaces. Recently, a number of photoswitch chemistries have emerged to tailor the photoresponsive properties of photosurfactants. However, systematic studies investigating how photoresponsive surfactant behavior depends on the photochemical and photophysical properties of the switch remain scarce. In this work, we develop synthetic schemes and surfactant designs to produce a well-controlled library of photosurfactants to comparatively assess the behavior of photoswitch chemistry on interfacial behavior. We employ photoinduced spreading of droplets at fluid interfaces as a model for such studies. We show that although photosurfactant response is largely guided by expected trends with changes in polarity of the photoswitch, interfacial behavior also depends nontrivially and sometimes counter-intuitively on the kinetics and mechanisms of photoswitching, particularly at the interface of two solvents, as well as on complex interactions with other surfactants. Understanding these complexities enables the design of new photosurfactant systems and their optimization toward responsive functions including triggered spreading, dewetting, and destabilization of droplets on solid and fluid surfaces.","lang":"eng"}],"citation":{"ieee":"S. Seshadri <i>et al.</i>, “Influence of polarity change and photophysical effects on photosurfactant-driven wetting,” <i>Langmuir</i>, vol. 37, no. 33. American Chemical Society, pp. 9939–9951, 2021.","short":"S. Seshadri, S.J. Bailey, L. Zhao, J. Fisher, M. Sroda, M. Chiu, F.J. Stricker, M.T. Valentine, J. Read de Alaniz, M.E. Helgeson, Langmuir 37 (2021) 9939–9951.","chicago":"Seshadri, Serena, Sophia J. Bailey, Lei Zhao, Julia Fisher, Miranda Sroda, Michelle Chiu, Friedrich J Stricker, Megan T. Valentine, Javier Read de Alaniz, and Matthew E. Helgeson. “Influence of Polarity Change and Photophysical Effects on Photosurfactant-Driven Wetting.” <i>Langmuir</i>. American Chemical Society, 2021. <a href=\"https://doi.org/10.1021/acs.langmuir.1c00769\">https://doi.org/10.1021/acs.langmuir.1c00769</a>.","apa":"Seshadri, S., Bailey, S. J., Zhao, L., Fisher, J., Sroda, M., Chiu, M., … Helgeson, M. E. (2021). Influence of polarity change and photophysical effects on photosurfactant-driven wetting. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.langmuir.1c00769\">https://doi.org/10.1021/acs.langmuir.1c00769</a>","ama":"Seshadri S, Bailey SJ, Zhao L, et al. Influence of polarity change and photophysical effects on photosurfactant-driven wetting. <i>Langmuir</i>. 2021;37(33):9939-9951. doi:<a href=\"https://doi.org/10.1021/acs.langmuir.1c00769\">10.1021/acs.langmuir.1c00769</a>","mla":"Seshadri, Serena, et al. “Influence of Polarity Change and Photophysical Effects on Photosurfactant-Driven Wetting.” <i>Langmuir</i>, vol. 37, no. 33, American Chemical Society, 2021, pp. 9939–51, doi:<a href=\"https://doi.org/10.1021/acs.langmuir.1c00769\">10.1021/acs.langmuir.1c00769</a>.","ista":"Seshadri S, Bailey SJ, Zhao L, Fisher J, Sroda M, Chiu M, Stricker FJ, Valentine MT, Read de Alaniz J, Helgeson ME. 2021. Influence of polarity change and photophysical effects on photosurfactant-driven wetting. Langmuir. 37(33), 9939–9951."},"author":[{"last_name":"Seshadri","first_name":"Serena","full_name":"Seshadri, Serena"},{"full_name":"Bailey, Sophia J.","first_name":"Sophia J.","last_name":"Bailey"},{"last_name":"Zhao","first_name":"Lei","full_name":"Zhao, Lei"},{"last_name":"Fisher","first_name":"Julia","full_name":"Fisher, Julia"},{"last_name":"Sroda","first_name":"Miranda","full_name":"Sroda, Miranda"},{"last_name":"Chiu","first_name":"Michelle","full_name":"Chiu, Michelle"},{"full_name":"Stricker, Friedrich J","id":"7aca2cfc-46cf-11f0-abd3-8c96b5186745","last_name":"Stricker","first_name":"Friedrich J"},{"first_name":"Megan T.","last_name":"Valentine","full_name":"Valentine, Megan T."},{"full_name":"Read de Alaniz, Javier","first_name":"Javier","last_name":"Read de Alaniz"},{"first_name":"Matthew E.","last_name":"Helgeson","full_name":"Helgeson, Matthew E."}],"quality_controlled":"1","month":"08","year":"2021","day":"09","date_created":"2026-05-06T10:56:52Z","volume":37},{"date_updated":"2026-07-15T07:48:42Z","issue":"9","publication_status":"published","status":"public","doi":"10.1021/acs.langmuir.0c03361","scopus_import":"1","intvolume":"        37","_id":"22217","ddc":["540"],"OA_type":"hybrid","language":[{"iso":"eng"}],"article_processing_charge":"No","title":"Synthesis of rough colloidal SU-8 rods and bananas via nanoprecipitation","article_type":"original","oa_version":"Published Version","type":"journal_article","page":"2900-2906","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","abstract":[{"text":"Surface roughness plays an important role in determining the mechanical properties, wettability, and self-assembly in colloidal systems. In this work, we develop a simple and fast method to produce rough colloidal SU-8 rods, bananas, and spheres, via the nanoprecipitation of SU-8 in water. During this process, SU-8 nanospheres are absorbed onto the surface of the colloidal SU-8 particles and then cross-linked using UV-light. The size of the spherical asperities and the asperity density are controlled by the concentration of SU-8 used during the nanoprecipitation reaction. Fluorescent labeling of the rough SU-8 colloidal particles allows for their confocal imaging, which demonstrates their stability at high packing fractions. With these newly developed rough particles, we provide a colloidal model system that allows for studies addressing the impact of surface roughness on materials composed of anisotropic particles.","lang":"eng"}],"citation":{"ieee":"C. Fernández-Rico, J. S. Urbach, and R. P. A. Dullens, “Synthesis of rough colloidal SU-8 rods and bananas via nanoprecipitation,” <i>Langmuir</i>, vol. 37, no. 9. American Chemical Society, pp. 2900–2906, 2021.","short":"C. Fernández-Rico, J.S. Urbach, R.P.A. Dullens, Langmuir 37 (2021) 2900–2906.","chicago":"Fernández-Rico, Carla, Jeffrey S. Urbach, and Roel P. A. Dullens. “Synthesis of Rough Colloidal SU-8 Rods and Bananas via Nanoprecipitation.” <i>Langmuir</i>. American Chemical Society, 2021. <a href=\"https://doi.org/10.1021/acs.langmuir.0c03361\">https://doi.org/10.1021/acs.langmuir.0c03361</a>.","apa":"Fernández-Rico, C., Urbach, J. S., &#38; Dullens, R. P. A. (2021). Synthesis of rough colloidal SU-8 rods and bananas via nanoprecipitation. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.langmuir.0c03361\">https://doi.org/10.1021/acs.langmuir.0c03361</a>","ama":"Fernández-Rico C, Urbach JS, Dullens RPA. Synthesis of rough colloidal SU-8 rods and bananas via nanoprecipitation. <i>Langmuir</i>. 2021;37(9):2900-2906. doi:<a href=\"https://doi.org/10.1021/acs.langmuir.0c03361\">10.1021/acs.langmuir.0c03361</a>","mla":"Fernández-Rico, Carla, et al. “Synthesis of Rough Colloidal SU-8 Rods and Bananas via Nanoprecipitation.” <i>Langmuir</i>, vol. 37, no. 9, American Chemical Society, 2021, pp. 2900–06, doi:<a href=\"https://doi.org/10.1021/acs.langmuir.0c03361\">10.1021/acs.langmuir.0c03361</a>.","ista":"Fernández-Rico C, Urbach JS, Dullens RPA. 2021. Synthesis of rough colloidal SU-8 rods and bananas via nanoprecipitation. Langmuir. 37(9), 2900–2906."},"publication":"Langmuir","main_file_link":[{"url":"https://doi.org/10.1021/acs.langmuir.0c03361","open_access":"1"}],"pmid":1,"OA_place":"publisher","publication_identifier":{"eissn":["1520-5827"],"issn":["0743-7463"]},"external_id":{"pmid":["33635671"]},"date_published":"2021-02-26T00:00:00Z","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","short":"CC BY-NC-ND (4.0)","image":"/images/cc_by_nc_nd.png"},"publisher":"American Chemical Society","has_accepted_license":"1","volume":37,"year":"2021","day":"26","date_created":"2026-06-30T06:36:01Z","oa":1,"author":[{"full_name":"Fernández-Rico, Carla","id":"492def71-6250-11f0-b278-d41dbd241b62","last_name":"Fernández-Rico","first_name":"Carla"},{"full_name":"Urbach, Jeffrey S.","first_name":"Jeffrey S.","last_name":"Urbach"},{"full_name":"Dullens, Roel P. A.","last_name":"Dullens","first_name":"Roel P. A."}],"quality_controlled":"1","month":"02"},{"day":"25","year":"2016","date_created":"2023-08-01T09:42:37Z","volume":32,"quality_controlled":"1","author":[{"last_name":"Moldt","first_name":"Thomas","full_name":"Moldt, Thomas"},{"full_name":"Przyrembel, Daniel","first_name":"Daniel","last_name":"Przyrembel"},{"full_name":"Schulze, Michael","first_name":"Michael","last_name":"Schulze"},{"last_name":"Bronsch","first_name":"Wibke","full_name":"Bronsch, Wibke"},{"first_name":"Larissa","last_name":"Boie","full_name":"Boie, Larissa"},{"full_name":"Brete, Daniel","first_name":"Daniel","last_name":"Brete"},{"last_name":"Gahl","first_name":"Cornelius","full_name":"Gahl, Cornelius"},{"full_name":"Klajn, Rafal","last_name":"Klajn","first_name":"Rafal","id":"8e84690e-1e48-11ed-a02b-a1e6fb8bb53b"},{"first_name":"Petra","last_name":"Tegeder","full_name":"Tegeder, Petra"},{"full_name":"Weinelt, Martin","last_name":"Weinelt","first_name":"Martin"}],"month":"10","publication":"Langmuir","abstract":[{"lang":"eng","text":"Azobenzenealkanethiols in self-assembled monolayers (SAMs) on Au(111) exhibit reversible trans–cis photoisomerization when diluted with alkanethiol spacers. Using these mixed SAMs, we show switching of the linear optical and second-harmonic response. The effective switching of these surface optical properties relies on a reasonably large cross section and a high photoisomerization yield as well as a long lifetime of the metastable cis isomer. We quantified the switching process by X-ray absorption spectroscopy. The cross sections for the trans–cis and cis–trans photoisomerization with 365 and 455 nm light, respectively, are 1 order of magnitude smaller than in solution. In vacuum, the 365 nm photostationary state comprises 50–74% of the molecules in the cis form, limited by their rapid thermal isomerization back to the trans state. In contrast, the 455 nm photostationary state contains nearly 100% trans-azobenzene. We determined time constants for the thermal cis–trans isomerization of only a few minutes in vacuum and in a dry nitrogen atmosphere but of more than 1 day in ambient air. Our results suggest that adventitious water adsorbed on the surface of the SAM stabilizes the polar cis configuration of azobenzene under ambient conditions. The back reaction rate constants differing by 2 orders of magnitude underline the huge influence of the environment and, accordingly, its importance when comparing various experiments."}],"citation":{"ista":"Moldt T, Przyrembel D, Schulze M, Bronsch W, Boie L, Brete D, Gahl C, Klajn R, Tegeder P, Weinelt M. 2016. Differing isomerization kinetics of azobenzene-functionalized self-assembled monolayers in ambient air and in vacuum. Langmuir. 32(42), 10795–10801.","mla":"Moldt, Thomas, et al. “Differing Isomerization Kinetics of Azobenzene-Functionalized Self-Assembled Monolayers in Ambient Air and in Vacuum.” <i>Langmuir</i>, vol. 32, no. 42, American Chemical Society, 2016, pp. 10795–801, doi:<a href=\"https://doi.org/10.1021/acs.langmuir.6b01690\">10.1021/acs.langmuir.6b01690</a>.","ama":"Moldt T, Przyrembel D, Schulze M, et al. Differing isomerization kinetics of azobenzene-functionalized self-assembled monolayers in ambient air and in vacuum. <i>Langmuir</i>. 2016;32(42):10795-10801. doi:<a href=\"https://doi.org/10.1021/acs.langmuir.6b01690\">10.1021/acs.langmuir.6b01690</a>","apa":"Moldt, T., Przyrembel, D., Schulze, M., Bronsch, W., Boie, L., Brete, D., … Weinelt, M. (2016). Differing isomerization kinetics of azobenzene-functionalized self-assembled monolayers in ambient air and in vacuum. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.langmuir.6b01690\">https://doi.org/10.1021/acs.langmuir.6b01690</a>","chicago":"Moldt, Thomas, Daniel Przyrembel, Michael Schulze, Wibke Bronsch, Larissa Boie, Daniel Brete, Cornelius Gahl, Rafal Klajn, Petra Tegeder, and Martin Weinelt. “Differing Isomerization Kinetics of Azobenzene-Functionalized Self-Assembled Monolayers in Ambient Air and in Vacuum.” <i>Langmuir</i>. American Chemical Society, 2016. <a href=\"https://doi.org/10.1021/acs.langmuir.6b01690\">https://doi.org/10.1021/acs.langmuir.6b01690</a>.","short":"T. Moldt, D. Przyrembel, M. Schulze, W. Bronsch, L. Boie, D. Brete, C. Gahl, R. Klajn, P. Tegeder, M. Weinelt, Langmuir 32 (2016) 10795–10801.","ieee":"T. Moldt <i>et al.</i>, “Differing isomerization kinetics of azobenzene-functionalized self-assembled monolayers in ambient air and in vacuum,” <i>Langmuir</i>, vol. 32, no. 42. American Chemical Society, pp. 10795–10801, 2016."},"publisher":"American Chemical Society","pmid":1,"external_id":{"pmid":["27681851"]},"date_published":"2016-10-25T00:00:00Z","publication_identifier":{"issn":["0743-7463"],"eissn":["1520-5827"]},"article_type":"original","keyword":["Electrochemistry","Spectroscopy","Surfaces and Interfaces","Condensed Matter Physics","General Materials Science"],"type":"journal_article","oa_version":"None","title":"Differing isomerization kinetics of azobenzene-functionalized self-assembled monolayers in ambient air and in vacuum","page":"10795-10801","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","doi":"10.1021/acs.langmuir.6b01690","scopus_import":"1","intvolume":"        32","date_updated":"2023-08-07T12:27:06Z","status":"public","issue":"42","publication_status":"published","_id":"13386","article_processing_charge":"No","language":[{"iso":"eng"}]},{"page":"2267 - 2276","extern":"1","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","title":"Co-Cu nanoparticles: Synthesis by galvanic replacement and phase rearrangement during catalytic activation","article_type":"original","type":"journal_article","oa_version":"None","_id":"368","language":[{"iso":"eng"}],"OA_type":"closed access","article_processing_charge":"No","date_updated":"2026-05-13T13:54:20Z","status":"public","issue":"9","publication_status":"published","doi":"10.1021/acs.langmuir.5b04622","scopus_import":"1","intvolume":"        32","quality_controlled":"1","author":[{"first_name":"Raquel","last_name":"Nafria","full_name":"Nafria, Raquel"},{"full_name":"Genç, Aziz","last_name":"Genç","first_name":"Aziz"},{"id":"43C61214-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-5013-2843","first_name":"Maria","last_name":"Ibáñez","full_name":"Ibáñez, Maria"},{"full_name":"Arbiol, Jprdi","first_name":"Jprdi","last_name":"Arbiol"},{"last_name":"Ramírez De La Piscina","first_name":"Pilar","full_name":"Ramírez De La Piscina, Pilar"},{"last_name":"Homs","first_name":"Narcís","full_name":"Homs, Narcís"},{"first_name":"Andreu","last_name":"Cabot","full_name":"Cabot, Andreu"}],"month":"03","volume":32,"day":"08","year":"2016","date_created":"2018-12-11T11:46:04Z","publist_id":"7462","date_published":"2016-03-08T00:00:00Z","acknowledgement":"The research was supported by the European Regional Development Funds and the Spanish MICINN projects CSD2009-00050, MAT2014-52416-P, and ENE2013-46624-C4-3-R. M.I. thanks AGAUR for her Beatriu de Pino?s postdoctoral grant 2013 BP-A00344. J.A. and A.G. acknowledge the funding from the Spanish MINECO Severo Ochoa Excellence Program and Generalitat de Catalunya 2014SGR1638.","publication_identifier":{"eissn":["1520-5827"],"issn":["0743-7463"]},"publisher":"American Chemical Society","abstract":[{"text":"The control of the phase distribution in multicomponent nanomaterials is critical to optimize their catalytic performance. In this direction, while impressive advances have been achieved in the past decade in the synthesis of multicomponent nanoparticles and nanocomposites, element rearrangement during catalyst activation has been frequently overseen. Here, we present a facile galvanic replacement-based procedure to synthesize Co@Cu nanoparticles with narrow size and composition distributions. We further characterize their phase arrangement before and after catalytic activation. When oxidized at 350 °C in air to remove organics, Co@Cu core-shell nanostructures oxidize to polycrystalline CuO-Co3O4 nanoparticles with randomly distributed CuO and Co3O4 crystallites. During a posterior reduction treatment in H2 atmosphere, Cu precipitates in a metallic core and Co migrates to the nanoparticle surface to form Cu@Co core-shell nanostructures. The catalytic behavior of such Cu@Co nanoparticles supported on mesoporous silica was further analyzed toward CO2 hydrogenation in real working conditions.","lang":"eng"}],"citation":{"ista":"Nafria R, Genç A, Ibáñez M, Arbiol J, Ramírez De La Piscina P, Homs N, Cabot A. 2016. Co-Cu nanoparticles: Synthesis by galvanic replacement and phase rearrangement during catalytic activation. Langmuir. 32(9), 2267–2276.","ama":"Nafria R, Genç A, Ibáñez M, et al. Co-Cu nanoparticles: Synthesis by galvanic replacement and phase rearrangement during catalytic activation. <i>Langmuir</i>. 2016;32(9):2267-2276. doi:<a href=\"https://doi.org/10.1021/acs.langmuir.5b04622\">10.1021/acs.langmuir.5b04622</a>","mla":"Nafria, Raquel, et al. “Co-Cu Nanoparticles: Synthesis by Galvanic Replacement and Phase Rearrangement during Catalytic Activation.” <i>Langmuir</i>, vol. 32, no. 9, American Chemical Society, 2016, pp. 2267–76, doi:<a href=\"https://doi.org/10.1021/acs.langmuir.5b04622\">10.1021/acs.langmuir.5b04622</a>.","short":"R. Nafria, A. Genç, M. Ibáñez, J. Arbiol, P. Ramírez De La Piscina, N. Homs, A. Cabot, Langmuir 32 (2016) 2267–2276.","chicago":"Nafria, Raquel, Aziz Genç, Maria Ibáñez, Jprdi Arbiol, Pilar Ramírez De La Piscina, Narcís Homs, and Andreu Cabot. “Co-Cu Nanoparticles: Synthesis by Galvanic Replacement and Phase Rearrangement during Catalytic Activation.” <i>Langmuir</i>. American Chemical Society, 2016. <a href=\"https://doi.org/10.1021/acs.langmuir.5b04622\">https://doi.org/10.1021/acs.langmuir.5b04622</a>.","apa":"Nafria, R., Genç, A., Ibáñez, M., Arbiol, J., Ramírez De La Piscina, P., Homs, N., &#38; Cabot, A. (2016). Co-Cu nanoparticles: Synthesis by galvanic replacement and phase rearrangement during catalytic activation. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.langmuir.5b04622\">https://doi.org/10.1021/acs.langmuir.5b04622</a>","ieee":"R. Nafria <i>et al.</i>, “Co-Cu nanoparticles: Synthesis by galvanic replacement and phase rearrangement during catalytic activation,” <i>Langmuir</i>, vol. 32, no. 9. American Chemical Society, pp. 2267–2276, 2016."},"publication":"Langmuir"},{"month":"01","quality_controlled":"1","author":[{"first_name":"Thomas","last_name":"Moldt","full_name":"Moldt, Thomas"},{"last_name":"Brete","first_name":"Daniel","full_name":"Brete, Daniel"},{"last_name":"Przyrembel","first_name":"Daniel","full_name":"Przyrembel, Daniel"},{"first_name":"Sanjib","last_name":"Das","full_name":"Das, Sanjib"},{"full_name":"Goldman, Joel R.","last_name":"Goldman","first_name":"Joel R."},{"last_name":"Kundu","first_name":"Pintu K.","full_name":"Kundu, Pintu K."},{"full_name":"Gahl, Cornelius","last_name":"Gahl","first_name":"Cornelius"},{"full_name":"Klajn, Rafal","last_name":"Klajn","first_name":"Rafal","id":"8e84690e-1e48-11ed-a02b-a1e6fb8bb53b"},{"last_name":"Weinelt","first_name":"Martin","full_name":"Weinelt, Martin"}],"date_created":"2023-08-01T09:45:02Z","day":"27","year":"2015","volume":31,"publisher":"American Chemical Society","date_published":"2015-01-27T00:00:00Z","external_id":{"pmid":["25544061"]},"publication_identifier":{"issn":["0743-7463"],"eissn":["1520-5827"]},"pmid":1,"publication":"Langmuir","citation":{"ista":"Moldt T, Brete D, Przyrembel D, Das S, Goldman JR, Kundu PK, Gahl C, Klajn R, Weinelt M. 2015. Tailoring the properties of surface-immobilized azobenzenes by monolayer dilution and surface curvature. Langmuir. 31(3), 1048–1057.","ama":"Moldt T, Brete D, Przyrembel D, et al. Tailoring the properties of surface-immobilized azobenzenes by monolayer dilution and surface curvature. <i>Langmuir</i>. 2015;31(3):1048-1057. doi:<a href=\"https://doi.org/10.1021/la504291n\">10.1021/la504291n</a>","mla":"Moldt, Thomas, et al. “Tailoring the Properties of Surface-Immobilized Azobenzenes by Monolayer Dilution and Surface Curvature.” <i>Langmuir</i>, vol. 31, no. 3, American Chemical Society, 2015, pp. 1048–57, doi:<a href=\"https://doi.org/10.1021/la504291n\">10.1021/la504291n</a>.","short":"T. Moldt, D. Brete, D. Przyrembel, S. Das, J.R. Goldman, P.K. Kundu, C. Gahl, R. Klajn, M. Weinelt, Langmuir 31 (2015) 1048–1057.","chicago":"Moldt, Thomas, Daniel Brete, Daniel Przyrembel, Sanjib Das, Joel R. Goldman, Pintu K. Kundu, Cornelius Gahl, Rafal Klajn, and Martin Weinelt. “Tailoring the Properties of Surface-Immobilized Azobenzenes by Monolayer Dilution and Surface Curvature.” <i>Langmuir</i>. American Chemical Society, 2015. <a href=\"https://doi.org/10.1021/la504291n\">https://doi.org/10.1021/la504291n</a>.","apa":"Moldt, T., Brete, D., Przyrembel, D., Das, S., Goldman, J. R., Kundu, P. K., … Weinelt, M. (2015). Tailoring the properties of surface-immobilized azobenzenes by monolayer dilution and surface curvature. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/la504291n\">https://doi.org/10.1021/la504291n</a>","ieee":"T. Moldt <i>et al.</i>, “Tailoring the properties of surface-immobilized azobenzenes by monolayer dilution and surface curvature,” <i>Langmuir</i>, vol. 31, no. 3. American Chemical Society, pp. 1048–1057, 2015."},"abstract":[{"text":"Photoswitching in densely packed azobenzene self-assembled monolayers (SAMs) is strongly affected by steric constraints and excitonic coupling between neighboring chromophores. Therefore, control of the chromophore density is essential for enhancing and manipulating the photoisomerization yield. We systematically compare two methods to achieve this goal: First, we assemble monocomponent azobenzene–alkanethiolate SAMs on gold nanoparticles of varying size. Second, we form mixed SAMs of azobenzene–alkanethiolates and “dummy” alkanethiolates on planar substrates. Both methods lead to a gradual decrease of the chromophore density and enable efficient photoswitching with low-power light sources. X-ray spectroscopy reveals that coadsorption from solution yields mixtures with tunable composition. The orientation of the chromophores with respect to the surface normal changes from a tilted to an upright position with increasing azobenzene density. For both systems, optical spectroscopy reveals a pronounced excitonic shift that increases with the chromophore density. In spite of exciting the optical transition of the monomer, the main spectral change in mixed SAMs occurs in the excitonic band. In addition, the photoisomerization yield decreases only slightly by increasing the azobenzene–alkanethiolate density, and we observed photoswitching even with minor dilutions. Unlike in solution, azobenzene in the planar SAM can be switched back almost completely by optical excitation from the cis to the original trans state within a short time scale. These observations indicate cooperativity in the photoswitching process of mixed SAMs.","lang":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","page":"1048-1057","type":"journal_article","oa_version":"None","article_type":"original","keyword":["Electrochemistry","Spectroscopy","Surfaces and Interfaces","Condensed Matter Physics","General Materials Science"],"title":"Tailoring the properties of surface-immobilized azobenzenes by monolayer dilution and surface curvature","article_processing_charge":"No","language":[{"iso":"eng"}],"_id":"13396","intvolume":"        31","scopus_import":"1","doi":"10.1021/la504291n","status":"public","issue":"3","publication_status":"published","date_updated":"2024-10-14T12:18:08Z"},{"publication":"Langmuir","abstract":[{"lang":"eng","text":"Monodisperse Pd2Sn nanorods with tuned size and aspect ratio were prepared by co-reduction of metal salts in the presence of trioctylphosphine, amine, and chloride ions. Asymmetric Pd2Sn nanostructures were achieved by the selective desorption of a surfactant mediated by chlorine ions. A preliminary evaluation of the geometry influence on catalytic properties evidenced Pd2Sn nanorods to have improved catalytic performance. In view of these results, Pd2Sn nanorods were also evaluated for water denitration. "}],"citation":{"ieee":"Z. Lu <i>et al.</i>, “Size and aspect ratio control of Pd inf 2 inf Sn nanorods and their water denitration properties,” <i>Langmuir</i>, vol. 31, no. 13. American Chemical Society, pp. 3952–3957, 2015.","apa":"Lu, Z., Ibáñez, M., Antolín, A., Genç, A., Shavel, A., Contreras, S., … Cabot, A. (2015). Size and aspect ratio control of Pd inf 2 inf Sn nanorods and their water denitration properties. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/la504906q\">https://doi.org/10.1021/la504906q</a>","chicago":"Lu, Zhishan, Maria Ibáñez, Ana Antolín, Aziz Genç, Alexey Shavel, Sandra Contreras, Francesc Medina, Jordi Arbiol, and Andreu Cabot. “Size and Aspect Ratio Control of Pd Inf 2 Inf Sn Nanorods and Their Water Denitration Properties.” <i>Langmuir</i>. American Chemical Society, 2015. <a href=\"https://doi.org/10.1021/la504906q\">https://doi.org/10.1021/la504906q</a>.","short":"Z. Lu, M. Ibáñez, A. Antolín, A. Genç, A. Shavel, S. Contreras, F. Medina, J. Arbiol, A. Cabot, Langmuir 31 (2015) 3952–3957.","mla":"Lu, Zhishan, et al. “Size and Aspect Ratio Control of Pd Inf 2 Inf Sn Nanorods and Their Water Denitration Properties.” <i>Langmuir</i>, vol. 31, no. 13, American Chemical Society, 2015, pp. 3952–57, doi:<a href=\"https://doi.org/10.1021/la504906q\">10.1021/la504906q</a>.","ama":"Lu Z, Ibáñez M, Antolín A, et al. Size and aspect ratio control of Pd inf 2 inf Sn nanorods and their water denitration properties. <i>Langmuir</i>. 2015;31(13):3952-3957. doi:<a href=\"https://doi.org/10.1021/la504906q\">10.1021/la504906q</a>","ista":"Lu Z, Ibáñez M, Antolín A, Genç A, Shavel A, Contreras S, Medina F, Arbiol J, Cabot A. 2015. Size and aspect ratio control of Pd inf 2 inf Sn nanorods and their water denitration properties. Langmuir. 31(13), 3952–3957."},"publisher":"American Chemical Society","pmid":1,"publist_id":"7469","publication_identifier":{"issn":["0743-7463"],"eissn":["1520-5827"]},"date_published":"2015-04-07T00:00:00Z","external_id":{"pmid":["25751745"]},"year":"2015","day":"07","date_created":"2018-12-11T11:46:02Z","volume":31,"author":[{"full_name":"Lu, Zhishan","first_name":"Zhishan","last_name":"Lu"},{"id":"43C61214-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-5013-2843","first_name":"Maria","last_name":"Ibáñez","full_name":"Ibáñez, Maria"},{"full_name":"Antolín, Ana","last_name":"Antolín","first_name":"Ana"},{"first_name":"Aziz","last_name":"Genç","full_name":"Genç, Aziz"},{"full_name":"Shavel, Alexey","first_name":"Alexey","last_name":"Shavel"},{"full_name":"Contreras, Sandra","last_name":"Contreras","first_name":"Sandra"},{"full_name":"Medina, Francesc","last_name":"Medina","first_name":"Francesc"},{"full_name":"Arbiol, Jordi","first_name":"Jordi","last_name":"Arbiol"},{"first_name":"Andreu","last_name":"Cabot","full_name":"Cabot, Andreu"}],"quality_controlled":"1","month":"04","doi":"10.1021/la504906q","scopus_import":"1","intvolume":"        31","date_updated":"2026-05-19T08:52:57Z","issue":"13","publication_status":"published","status":"public","_id":"362","OA_type":"closed access","article_processing_charge":"No","language":[{"iso":"eng"}],"article_type":"original","oa_version":"None","type":"journal_article","title":"Size and aspect ratio control of Pd inf 2 inf Sn nanorods and their water denitration properties","page":"3952 - 3957","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","extern":"1"},{"volume":23,"date_created":"2023-08-01T10:31:33Z","year":"2007","day":"11","month":"04","author":[{"last_name":"Paszewski","first_name":"Maciej","full_name":"Paszewski, Maciej"},{"full_name":"Smoukov, Stoyan K.","last_name":"Smoukov","first_name":"Stoyan K."},{"full_name":"Klajn, Rafal","first_name":"Rafal","last_name":"Klajn","id":"8e84690e-1e48-11ed-a02b-a1e6fb8bb53b"},{"full_name":"Grzybowski, Bartosz A.","last_name":"Grzybowski","first_name":"Bartosz A."}],"quality_controlled":"1","citation":{"ama":"Paszewski M, Smoukov SK, Klajn R, Grzybowski BA. Multilevel surface nano- and microstructuring via sequential photoswelling of dichromated gelatin. <i>Langmuir</i>. 2007;23(10):5419-5422. doi:<a href=\"https://doi.org/10.1021/la062982c\">10.1021/la062982c</a>","mla":"Paszewski, Maciej, et al. “Multilevel Surface Nano- and Microstructuring via Sequential Photoswelling of Dichromated Gelatin.” <i>Langmuir</i>, vol. 23, no. 10, American Chemical Society, 2007, pp. 5419–22, doi:<a href=\"https://doi.org/10.1021/la062982c\">10.1021/la062982c</a>.","ista":"Paszewski M, Smoukov SK, Klajn R, Grzybowski BA. 2007. Multilevel surface nano- and microstructuring via sequential photoswelling of dichromated gelatin. Langmuir. 23(10), 5419–5422.","ieee":"M. Paszewski, S. K. Smoukov, R. Klajn, and B. A. Grzybowski, “Multilevel surface nano- and microstructuring via sequential photoswelling of dichromated gelatin,” <i>Langmuir</i>, vol. 23, no. 10. American Chemical Society, pp. 5419–5422, 2007.","chicago":"Paszewski, Maciej, Stoyan K. Smoukov, Rafal Klajn, and Bartosz A. Grzybowski. “Multilevel Surface Nano- and Microstructuring via Sequential Photoswelling of Dichromated Gelatin.” <i>Langmuir</i>. American Chemical Society, 2007. <a href=\"https://doi.org/10.1021/la062982c\">https://doi.org/10.1021/la062982c</a>.","short":"M. Paszewski, S.K. Smoukov, R. Klajn, B.A. Grzybowski, Langmuir 23 (2007) 5419–5422.","apa":"Paszewski, M., Smoukov, S. K., Klajn, R., &#38; Grzybowski, B. A. (2007). Multilevel surface nano- and microstructuring via sequential photoswelling of dichromated gelatin. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/la062982c\">https://doi.org/10.1021/la062982c</a>"},"abstract":[{"text":"Photoswelling of thin films of dichromated gelatin provides a basis for fabrication of multilevel surface reliefs via sequential UV illumination through different photomasks. The remarkable feature of this simple, benchtop technique is that by adjusting irradiation times, film thickness, or its hydration state the heights of the developed features can be varied from few nanometers to tens of microns. After UV exposure, the surface structures can be replicated faithfully into either soft or hard PDMS stamps.","lang":"eng"}],"publication":"Langmuir","publication_identifier":{"eissn":["1520-5827"],"issn":["0743-7463"]},"date_published":"2007-04-11T00:00:00Z","external_id":{"pmid":["17425340"]},"pmid":1,"publisher":"American Chemical Society","title":"Multilevel surface nano- and microstructuring via sequential photoswelling of dichromated gelatin","oa_version":"None","type":"journal_article","article_type":"original","keyword":["Electrochemistry","Spectroscopy","Surfaces and Interfaces","Condensed Matter Physics","General Materials Science"],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","page":"5419-5422","issue":"10","publication_status":"published","status":"public","date_updated":"2023-08-08T11:26:24Z","intvolume":"        23","scopus_import":"1","doi":"10.1021/la062982c","article_processing_charge":"No","language":[{"iso":"eng"}],"_id":"13426"},{"intvolume":"        21","doi":"10.1021/la0487747","scopus_import":"1","publication_status":"published","issue":"1","status":"public","date_updated":"2023-08-08T12:15:48Z","language":[{"iso":"eng"}],"article_processing_charge":"No","_id":"13432","oa_version":"None","type":"journal_article","keyword":["Electrochemistry","Spectroscopy","Surfaces and Interfaces","Condensed Matter Physics","General Materials Science"],"article_type":"original","title":"One-step multilevel microfabrication by reaction−diffusion","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","extern":"1","page":"418-423","publication":"Langmuir","citation":{"ieee":"C. J. Campbell, R. Klajn, M. Fialkowski, and B. A. Grzybowski, “One-step multilevel microfabrication by reaction−diffusion,” <i>Langmuir</i>, vol. 21, no. 1. American Chemical Society, pp. 418–423, 2005.","apa":"Campbell, C. J., Klajn, R., Fialkowski, M., &#38; Grzybowski, B. A. (2005). One-step multilevel microfabrication by reaction−diffusion. <i>Langmuir</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/la0487747\">https://doi.org/10.1021/la0487747</a>","chicago":"Campbell, Christopher J., Rafal Klajn, Marcin Fialkowski, and Bartosz A. Grzybowski. “One-Step Multilevel Microfabrication by Reaction−diffusion.” <i>Langmuir</i>. American Chemical Society, 2005. <a href=\"https://doi.org/10.1021/la0487747\">https://doi.org/10.1021/la0487747</a>.","short":"C.J. Campbell, R. Klajn, M. Fialkowski, B.A. Grzybowski, Langmuir 21 (2005) 418–423.","mla":"Campbell, Christopher J., et al. “One-Step Multilevel Microfabrication by Reaction−diffusion.” <i>Langmuir</i>, vol. 21, no. 1, American Chemical Society, 2005, pp. 418–23, doi:<a href=\"https://doi.org/10.1021/la0487747\">10.1021/la0487747</a>.","ama":"Campbell CJ, Klajn R, Fialkowski M, Grzybowski BA. One-step multilevel microfabrication by reaction−diffusion. <i>Langmuir</i>. 2005;21(1):418-423. doi:<a href=\"https://doi.org/10.1021/la0487747\">10.1021/la0487747</a>","ista":"Campbell CJ, Klajn R, Fialkowski M, Grzybowski BA. 2005. One-step multilevel microfabrication by reaction−diffusion. Langmuir. 21(1), 418–423."},"abstract":[{"lang":"eng","text":"A new experimental technique is described that uses reaction−diffusion phenomena as a means of one-step microfabrication of complex, multilevel surface reliefs. Thin films of dry gelatin doped with potassium hexacyanoferrate are chemically micropatterned with a solution of silver nitrate delivered from an agarose stamp. Precipitation reaction between the two salts causes the surface to deform. The mechanism of surface deformation is shown to involve a sequence of reactions, diffusion, and gel swelling/contraction. This mechanism is established experimentally and provides a basis of a theoretical lattice-gas model that allows prediction surface topographies emerging from arbitrary geometries of the stamped features. The usefulness of the technique is demonstrated by using it to rapidly prepare two types of mold for passive microfluidic mixers."}],"publisher":"American Chemical Society","publication_identifier":{"issn":["0743-7463"],"eissn":["1520-5827"]},"date_published":"2005-01-21T00:00:00Z","external_id":{"pmid":["15620333"]},"pmid":1,"date_created":"2023-08-01T10:38:29Z","year":"2005","day":"21","volume":21,"month":"01","author":[{"full_name":"Campbell, Christopher J.","last_name":"Campbell","first_name":"Christopher J."},{"last_name":"Klajn","first_name":"Rafal","id":"8e84690e-1e48-11ed-a02b-a1e6fb8bb53b","full_name":"Klajn, Rafal"},{"first_name":"Marcin","last_name":"Fialkowski","full_name":"Fialkowski, Marcin"},{"last_name":"Grzybowski","first_name":"Bartosz A.","full_name":"Grzybowski, Bartosz A."}],"quality_controlled":"1"}]