[{"acknowledged_ssus":[{"_id":"LifeSc"}],"author":[{"id":"0cf4072c-94e2-11ee-bdf9-90a13138901e","full_name":"Hoffman Jr, John R","first_name":"John R","last_name":"Hoffman Jr"},{"last_name":"Freunberger","first_name":"Stefan Alexander","full_name":"Freunberger, Stefan Alexander","id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","orcid":"0000-0003-2902-5319"},{"first_name":"Scott R","last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","OA_place":"publisher","title":"Ionentransfer während der Ionomer Kontaktelektrifizierung: Bindungsaffinität steuert Aufladung","article_processing_charge":"No","abstract":[{"lang":"eng","text":"Kontaktelektrifizierung tritt allgegenwärtig in der Natur auf, doch die Identität der Ladungsträger bleibt in den meisten Fällen unklar, mit Elektronen, Ionen oder nanoskopischen Materialfragmenten als mögliche Kandidaten. Ein Material, bei dem die übertragene Spezies mehr gewiss erscheint, sind Ionomere, d. h. Polymere mit mobilen Ionen, deren Ladung durch fest gebundene Gegenladungen ausgeglichen wird. Wenn Ionomere mit einer neutralen Oberfläche in Kontakt kommen, lädt sich diese mit dem Vorzeichen der mobilen Ionen auf, was stark auf Ionentransfer hindeutet. Der zugrundeliegende Mechanismus sowie die bestimmenden Einflussfaktoren dieses Transfers sind jedoch bislang nur unzureichend verstanden. In der vorliegenden Arbeit zeigen wir, dass die Bindungsaffinität zwischen den mobilen Ionen und dem Ionomer den Ladungstransfer maßgeblich bestimmt. Wir untersuchen Ionomere mit gebundenen Anionen und Kationen und erzeugen mittels Ionenaustausch Proben mit einer Reihe unterschiedlicher übertragbarer Ionen. Für das anionische Ionomer beobachten wir eine starke Abhängigkeit von der Bindungsaffinität, wobei mobile Kationen mit der höchsten Affinität am wenigsten Ladung übertragen. Eine schwächere, aber trotzdem klare Abhängigkeit wurde für das kationische Ionomer gemessen, welches der freien Hydratationsenergie der mobilen Anionen folgt. Mithilfe von optischer Emissionsspektroskopie mit induktiv gekoppeltem Plasma (ICP‐OES) bestätigen wir den Transfer von mobilen Ionen auf die Oberfläche der Gegenprobe. Unsere Ergebnisse bestätigen die Ladungsträgeridentität und den Mechanismus des Ladungstransfers bei ionomerischen Materialien, was auch für das allgemeine Verständnis von Kontaktelektrifizierung von Bedeutung sein könnte."}],"publication_status":"epub_ahead","doi":"10.1002/ange.5487708","publication_identifier":{"eissn":["1521-3757"],"issn":["0044-8249"]},"dataavailabilitystatement":"The data that support the findings of this study are available from the corresponding author upon reasonable request.","publication":"Angewandte Chemie","das_tickbox":"1","year":"2026","date_created":"2026-07-28T18:03:20Z","researchdata_availability":"upon request","article_number":"e5487708","has_accepted_license":"1","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1002/ange.5487708"}],"ddc":["540"],"corr_author":"1","supplementarymaterial":"yes","quality_controlled":"1","_id":"22601","scopus_import":"1","article_type":"original","oa_version":"Published Version","acknowledgement":"Diese Forschung wurde durch die Scientific Service Units (SSU) des IST Austria unterstützt, durch Nutzung von Ressourcen der Lab Support Facility (LSF).\r\nOpen Access funding provided by Institute of Science and Technology Austria.","type":"journal_article","language":[{"iso":"ger"}],"month":"07","date_published":"2026-07-26T00:00:00Z","publisher":"Wiley","department":[{"_id":"StFr"},{"_id":"ScWa"}],"date_updated":"2026-07-29T11:00:05Z","oa":1,"day":"26","status":"public","OA_type":"hybrid","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"citation":{"ieee":"J. R. Hoffman Jr, S. A. Freunberger, and S. R. Waitukaitis, “Ionentransfer während der Ionomer Kontaktelektrifizierung: Bindungsaffinität steuert Aufladung,” <i>Angewandte Chemie</i>. Wiley, 2026.","short":"J.R. Hoffman Jr, S.A. Freunberger, S.R. Waitukaitis, Angewandte Chemie (2026).","ista":"Hoffman Jr JR, Freunberger SA, Waitukaitis SR. 2026. Ionentransfer während der Ionomer Kontaktelektrifizierung: Bindungsaffinität steuert Aufladung. Angewandte Chemie., e5487708.","ama":"Hoffman Jr JR, Freunberger SA, Waitukaitis SR. Ionentransfer während der Ionomer Kontaktelektrifizierung: Bindungsaffinität steuert Aufladung. <i>Angewandte Chemie</i>. 2026. doi:<a href=\"https://doi.org/10.1002/ange.5487708\">10.1002/ange.5487708</a>","apa":"Hoffman Jr, J. R., Freunberger, S. A., &#38; Waitukaitis, S. R. (2026). Ionentransfer während der Ionomer Kontaktelektrifizierung: Bindungsaffinität steuert Aufladung. <i>Angewandte Chemie</i>. Wiley. <a href=\"https://doi.org/10.1002/ange.5487708\">https://doi.org/10.1002/ange.5487708</a>","chicago":"Hoffman Jr, John R, Stefan Alexander Freunberger, and Scott R Waitukaitis. “Ionentransfer während der Ionomer Kontaktelektrifizierung: Bindungsaffinität steuert Aufladung.” <i>Angewandte Chemie</i>. Wiley, 2026. <a href=\"https://doi.org/10.1002/ange.5487708\">https://doi.org/10.1002/ange.5487708</a>.","mla":"Hoffman Jr, John R., et al. “Ionentransfer während der Ionomer Kontaktelektrifizierung: Bindungsaffinität steuert Aufladung.” <i>Angewandte Chemie</i>, e5487708, Wiley, 2026, doi:<a href=\"https://doi.org/10.1002/ange.5487708\">10.1002/ange.5487708</a>."}},{"acknowledged_ssus":[{"_id":"LifeSc"}],"pmid":1,"author":[{"full_name":"Hoffman Jr, John R","id":"0cf4072c-94e2-11ee-bdf9-90a13138901e","last_name":"Hoffman Jr","first_name":"John R"},{"id":"A8CA28E6-CE23-11E9-AD2D-EC27E6697425","orcid":"0000-0003-2902-5319","full_name":"Freunberger, Stefan Alexander","first_name":"Stefan Alexander","last_name":"Freunberger"},{"first_name":"Scott R","last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2299-3176"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","OA_place":"publisher","title":"Ion transfer during ionomer contact electrification: Binding affinity controls charging","article_processing_charge":"Yes (via OA deal)","external_id":{"pmid":["42478784"]},"publication_status":"epub_ahead","abstract":[{"text":"Contact electrification occurs ubiquitously in nature, but the identity of charge carriers in most situations remains uncertain, with electrons, ions, or nanoscopic material fragments as viable candidates. One material where the species transferred seems more certain is ionomers, i.e., polymers that contain mobile ions balanced by fixed counter‐charges. When ionomers touch a neutral surface, the latter becomes charged in the sign of the mobile ion, strongly suggesting ion transfer. However, the mechanism and governing factors of transfer remain poorly understood. Here, we demonstrate that binding affinity between mobile ion and ionomer controls charge transfer with ionomers. We use ionomers with fixed anions and cations and perform ion exchange to create samples with a series of transferrable ions. We observe a strong binding‐affinity dependence for the anionic ionomer, such that mobile cations with the highest affinity transfers the least charge. Weaker, yet clear dependence was measured for the cationic ionomer, which follows the hydration free energy of the mobile anion. Using inductively coupled plasma optical emission spectroscopy (ICP‐OES), we confirm transfer of the mobile ions to the counter sample's surface. Our results confirm the identify and mechanism of charge transfer with ionomeric materials, with potential implications for contact electrification more broadly.","lang":"eng"}],"doi":"10.1002/anie.5487708","dataavailabilitystatement":"The data that support the findings of this study are available from the corresponding author upon reasonable request.","publication_identifier":{"eissn":["1521-3773"],"issn":["1433-7851"]},"das_tickbox":"1","publication":"Angewandte Chemie International Edition","date_created":"2026-07-28T18:04:19Z","year":"2026","article_number":"e5487708","researchdata_availability":"upon request","has_accepted_license":"1","main_file_link":[{"url":"https://doi.org/10.1002/anie.5487708","open_access":"1"}],"ddc":["540"],"supplementarymaterial":"yes","corr_author":"1","quality_controlled":"1","scopus_import":"1","_id":"22602","oa_version":"Published Version","article_type":"original","type":"journal_article","acknowledgement":"This research was supported by the Scientific Service Units (SSU) of IST-Austria through resources provided by the Lab Support Facility (LSF).\r\nOpen Access funding provided by Institute of Science and Technology Austria.","date_published":"2026-07-21T00:00:00Z","month":"07","language":[{"iso":"eng"}],"date_updated":"2026-07-29T11:25:58Z","department":[{"_id":"StFr"},{"_id":"ScWa"}],"publisher":"Wiley","oa":1,"day":"21","status":"public","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"OA_type":"hybrid","citation":{"apa":"Hoffman Jr, J. R., Freunberger, S. A., &#38; Waitukaitis, S. R. (2026). Ion transfer during ionomer contact electrification: Binding affinity controls charging. <i>Angewandte Chemie International Edition</i>. Wiley. <a href=\"https://doi.org/10.1002/anie.5487708\">https://doi.org/10.1002/anie.5487708</a>","chicago":"Hoffman Jr, John R, Stefan Alexander Freunberger, and Scott R Waitukaitis. “Ion Transfer during Ionomer Contact Electrification: Binding Affinity Controls Charging.” <i>Angewandte Chemie International Edition</i>. Wiley, 2026. <a href=\"https://doi.org/10.1002/anie.5487708\">https://doi.org/10.1002/anie.5487708</a>.","mla":"Hoffman Jr, John R., et al. “Ion Transfer during Ionomer Contact Electrification: Binding Affinity Controls Charging.” <i>Angewandte Chemie International Edition</i>, e5487708, Wiley, 2026, doi:<a href=\"https://doi.org/10.1002/anie.5487708\">10.1002/anie.5487708</a>.","short":"J.R. Hoffman Jr, S.A. Freunberger, S.R. Waitukaitis, Angewandte Chemie International Edition (2026).","ieee":"J. R. Hoffman Jr, S. A. Freunberger, and S. R. Waitukaitis, “Ion transfer during ionomer contact electrification: Binding affinity controls charging,” <i>Angewandte Chemie International Edition</i>. Wiley, 2026.","ama":"Hoffman Jr JR, Freunberger SA, Waitukaitis SR. Ion transfer during ionomer contact electrification: Binding affinity controls charging. <i>Angewandte Chemie International Edition</i>. 2026. doi:<a href=\"https://doi.org/10.1002/anie.5487708\">10.1002/anie.5487708</a>","ista":"Hoffman Jr JR, Freunberger SA, Waitukaitis SR. 2026. Ion transfer during ionomer contact electrification: Binding affinity controls charging. Angewandte Chemie International Edition., e5487708."}}]