{"year":"2025","department":[{"_id":"EdHa"}],"date_updated":"2025-09-30T10:44:48Z","_id":"19279","acknowledgement":"The authors thank B. Coquinot and G. Monet for fruitful discussions. L.B. acknowledges support from ERC-Synergy Grant Agreement No. 101071937, n-AQUA. P.R. acknowledges support from the European Union’s Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant Agreement No. 101034413.","abstract":[{"text":"Recent experimental advances in nanofluidics have allowed to explore ion transport across molecular-scale pores, in particular, for iontronic applications. Two-dimensional nanochannels—in which a single molecular layer of electrolyte is confined between solid walls—constitute a unique platform to investigate fluid and ion transport in extreme confinement, highlighting unconventional transport properties. In this work, we study ionic association in 2D nanochannels, and its consequences on non-linear ionic transport, using both molecular dynamics simulations and analytical theory. We show that under sufficient confinement, ions assemble into pairs or larger clusters in a process analogous to a Kosterlitz–Thouless transition, here modified by the dielectric confinement. We further show that the breaking of pairs results in an electric-field dependent conduction, a mechanism usually known as the second Wien effect. However the 2D nature of the system results in non-universal, temperature-dependent, scaling of the conductivity with electric field, leading to ionic coulomb blockade in some regimes. A 2D generalization of the Onsager theory fully accounts for the non-linear transport. These results suggest ways to exploit electrostatic interactions between ions to build new nanofluidic devices.","lang":"eng"}],"quality_controlled":"1","date_created":"2025-03-02T23:01:52Z","arxiv":1,"article_type":"original","isi":1,"article_number":"064703","pmid":1,"day":"14","oa_version":"Published Version","OA_place":"publisher","oa":1,"publication_identifier":{"eissn":["1089-7690"],"issn":["0021-9606"]},"OA_type":"hybrid","citation":{"ieee":"D. Toquer, L. Bocquet, and P. Robin, “Ionic association and Wien effect in 2D confined electrolytes,” <i>Journal of Chemical Physics</i>, vol. 162, no. 6. AIP Publishing, 2025.","chicago":"Toquer, Damien, Lydéric Bocquet, and Paul Robin. “Ionic Association and Wien Effect in 2D Confined Electrolytes.” <i>Journal of Chemical Physics</i>. AIP Publishing, 2025. <a href=\"https://doi.org/10.1063/5.0241949\">https://doi.org/10.1063/5.0241949</a>.","apa":"Toquer, D., Bocquet, L., &#38; Robin, P. (2025). Ionic association and Wien effect in 2D confined electrolytes. <i>Journal of Chemical Physics</i>. AIP Publishing. <a href=\"https://doi.org/10.1063/5.0241949\">https://doi.org/10.1063/5.0241949</a>","short":"D. Toquer, L. Bocquet, P. Robin, Journal of Chemical Physics 162 (2025).","ama":"Toquer D, Bocquet L, Robin P. Ionic association and Wien effect in 2D confined electrolytes. <i>Journal of Chemical Physics</i>. 2025;162(6). doi:<a href=\"https://doi.org/10.1063/5.0241949\">10.1063/5.0241949</a>","ista":"Toquer D, Bocquet L, Robin P. 2025. Ionic association and Wien effect in 2D confined electrolytes. Journal of Chemical Physics. 162(6), 064703.","mla":"Toquer, Damien, et al. “Ionic Association and Wien Effect in 2D Confined Electrolytes.” <i>Journal of Chemical Physics</i>, vol. 162, no. 6, 064703, AIP Publishing, 2025, doi:<a href=\"https://doi.org/10.1063/5.0241949\">10.1063/5.0241949</a>."},"article_processing_charge":"Yes (in subscription journal)","title":"Ionic association and Wien effect in 2D confined electrolytes","ec_funded":1,"author":[{"last_name":"Toquer","full_name":"Toquer, Damien","first_name":"Damien"},{"last_name":"Bocquet","first_name":"Lydéric","full_name":"Bocquet, Lydéric"},{"id":"48c58128-57b0-11ee-9095-dc28fd97fc1d","orcid":"0000-0002-5728-9189","last_name":"Robin","full_name":"Robin, Paul","first_name":"Paul"}],"publisher":"AIP Publishing","date_published":"2025-02-14T00:00:00Z","language":[{"iso":"eng"}],"ddc":["540"],"volume":162,"publication_status":"published","tmp":{"short":"CC BY-NC-ND (4.0)","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","image":"/images/cc_by_nc_nd.png"},"intvolume":"       162","status":"public","file":[{"date_created":"2025-03-04T10:29:36Z","creator":"dernst","file_name":"2025_JourChemicalPhysics_Toquer.pdf","date_updated":"2025-03-04T10:29:36Z","file_size":5807062,"access_level":"open_access","file_id":"19290","checksum":"c9008c2c50c917673aa588f75acbcb40","content_type":"application/pdf","success":1,"relation":"main_file"}],"external_id":{"isi":["001421300300001"],"arxiv":["2410.03316"],"pmid":["39932241"]},"doi":"10.1063/5.0241949","file_date_updated":"2025-03-04T10:29:36Z","publication":"Journal of Chemical Physics","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","corr_author":"1","has_accepted_license":"1","month":"02","project":[{"_id":"fc2ed2f7-9c52-11eb-aca3-c01059dda49c","grant_number":"101034413","name":"IST-BRIDGE: International postdoctoral program","call_identifier":"H2020"}],"issue":"6","scopus_import":"1","type":"journal_article"}