{"entity": "researcher", "timestamp": "2026-08-20T20:57:40.934Z", "family": "Hamedi", "given": "Mahiar Max", "initials": "MM", "orcid": "0000-0001-9088-1064", "affiliations": ["Department of Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 10044, Sweden."], "links": {"self": {"href": "https://publications-affiliated.scilifelab.se/researcher/ea65bd8c3fd642cbbd308e0641a0bc01.json"}, "display": {"href": "https://publications-affiliated.scilifelab.se/researcher/ea65bd8c3fd642cbbd308e0641a0bc01"}}, "publications": [{"entity": "publication", "iuid": "db35fa2c43da4f12accee901dc796a29", "links": {"self": {"href": "https://publications-affiliated.scilifelab.se/publication/db35fa2c43da4f12accee901dc796a29.json"}, "display": {"href": "https://publications-affiliated.scilifelab.se/publication/db35fa2c43da4f12accee901dc796a29"}}, "title": "In Situ Functionalization of Polar Polythiophene-Based Organic Electrochemical Transistor to Interface In Vitro Models.", "authors": [{"family": "Buchmann", "given": "Sebastian", "initials": "S", "orcid": "0000-0001-7442-3020", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/5d7fa19b55964898b15740e469f423a8.json"}}, {"family": "Stoop", "given": "Pepijn", "initials": "P"}, {"family": "Roekevisch", "given": "Kim", "initials": "K"}, {"family": "Jain", "given": "Saumey", "initials": "S", "orcid": "0000-0002-2810-2151", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/969496e3da804b54bea1cf345294433f.json"}}, {"family": "Kroon", "given": "Renee", "initials": "R", "orcid": "0000-0001-8053-4288", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/8edb30ab10ad4bf3b9122d9ca6f6380d.json"}}, {"family": "M\u00fcller", "given": "Christian", "initials": "C", "orcid": "0000-0001-7859-7909", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/c72e3ff85aa545c0a6ddec76712541db.json"}}, {"family": "Hamedi", "given": "Mahiar M", "initials": "MM", "orcid": "0000-0001-9088-1064", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/ea65bd8c3fd642cbbd308e0641a0bc01.json"}}, {"family": "Zeglio", "given": "Erica", "initials": "E"}, {"family": "Herland", "given": "Anna", "initials": "A", "orcid": "0000-0002-5002-2537", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/367ed0d139fe4136808b62ee61baa4f0.json"}}], "type": "journal article", "published": "2024-10-09", "journal": {"title": "ACS Appl Mater Interfaces", "issn": "1944-8252", "volume": "16", "issue": "40", "pages": "54292-54303", "issn-l": "1944-8244"}, "abstract": "Organic mixed ionic-electronic conductors are promising materials for interfacing and monitoring biological systems, with the aim of overcoming current challenges based on the mismatch between biological materials and convectional inorganic conductors. The conjugated polymer/polyelectrolyte complex poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT/PSS) is, up to date, the most widely used polymer for in vitro or in vivo measurements in the field of organic bioelectronics. However, PEDOT/PSS organic electrochemical transistors (OECTs) are limited by depletion mode operation and lack chemical groups that enable synthetic modifications for biointerfacing. Recently introduced thiophene-based polymers with oligoether side chains can operate in accumulation mode, and their chemical structure can be tuned during synthesis, for example, by the introduction of hydroxylated side chains. Here, we introduce a new thiophene-based conjugated polymer, p(g42T-T)-8% OH, where 8% of the glycol side chains are functionalized with a hydroxyl group. We report for the first time the compatibility of conjugated polymers containing ethylene glycol side chains in direct contact with cells. The additional hydroxyl group allows covalent modification of the surface of polymer films, enabling fine-tuning of the surface interaction properties of p(g42T-T)-8% OH with biological materials, either hindering or promoting cell adhesion. We further use p(g42T-T)-8% OH to fabricate the OECTs and demonstrate for the first time the monitoring of epithelial barrier formation of Caco-2 cells in vitro using accumulation mode OECTs. The conjugated polymer p(g42T-T)-8% OH allows organic-electronic-based materials to be easily modified and optimized to interface and monitor biological systems.", "doi": "10.1021/acsami.4c09197", "pmid": "39327895", "labels": [], "xrefs": [{"db": "pmc", "key": "PMC11472309"}], "notes": [], "created": "2026-08-20T08:08:22.084Z", "modified": "2026-08-20T08:08:22.221Z"}, {"entity": "publication", "iuid": "afae2549375b4f92939156b7e6029fe2", "links": {"self": {"href": "https://publications-affiliated.scilifelab.se/publication/afae2549375b4f92939156b7e6029fe2.json"}, "display": {"href": "https://publications-affiliated.scilifelab.se/publication/afae2549375b4f92939156b7e6029fe2"}}, "title": "Cleanroom-Free Direct Laser Micropatterning of Polymers for Organic Electrochemical Transistors in Logic Circuits and Glucose Biosensors.", "authors": [{"family": "Enrico", "given": "Alessandro", "initials": "A", "orcid": "0000-0002-8821-6759", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/637ef7e9c6a14e4597b4304013c988b7.json"}}, {"family": "Buchmann", "given": "Sebastian", "initials": "S", "orcid": "0000-0001-7442-3020", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/5d7fa19b55964898b15740e469f423a8.json"}}, {"family": "De Ferrari", "given": "Fabio", "initials": "F", "orcid": "0000-0003-0960-9931", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/21be7bf528794d57b0b1431da2a95247.json"}}, {"family": "Lin", "given": "Yunfan", "initials": "Y", "orcid": "0000-0002-6560-5209", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/e0a9d5ca176d42eb958ae277ed28062f.json"}}, {"family": "Wang", "given": "Yazhou", "initials": "Y"}, {"family": "Yue", "given": "Wan", "initials": "W"}, {"family": "M\u00e5rtensson", "given": "Gustaf", "initials": "G", "orcid": "0000-0002-6041-4980", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/77d0e449fc994885908cf8c228ce2995.json"}}, {"family": "Stemme", "given": "G\u00f6ran", "initials": "G", "orcid": "0000-0001-9552-4234", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/122f084eea624e5a801c8fafa6d48f6a.json"}}, {"family": "Hamedi", "given": "Mahiar Max", "initials": "MM", "orcid": "0000-0001-9088-1064", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/ea65bd8c3fd642cbbd308e0641a0bc01.json"}}, {"family": "Niklaus", "given": "Frank", "initials": "F", "orcid": "0000-0002-0525-8647", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/cbba7fd047e8468288fc79b7b0275ff3.json"}}, {"family": "Herland", "given": "Anna", "initials": "A", "orcid": "0000-0002-5002-2537", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/367ed0d139fe4136808b62ee61baa4f0.json"}}, {"family": "Zeglio", "given": "Erica", "initials": "E", "orcid": "0000-0002-6428-0633", "researcher": {"href": "https://publications-affiliated.scilifelab.se/researcher/e9f9fe3dcb5e4c9891c6f463c32a1679.json"}}], "type": "journal article", "published": "2024-07-00", "journal": {"title": "Adv Sci (Weinh)", "issn": "2198-3844", "volume": "11", "issue": "27", "pages": "e2307042", "issn-l": null}, "abstract": "Organic electrochemical transistors (OECTs) are promising devices for bioelectronics, such as biosensors. However, current cleanroom-based microfabrication of OECTs hinders fast prototyping and widespread adoption of this technology for low-volume, low-cost applications. To address this limitation, a versatile and scalable approach for ultrafast laser microfabrication of OECTs is herein reported, where a femtosecond laser to pattern insulating polymers (such as parylene C or polyimide) is first used, exposing the underlying metal electrodes serving as transistor terminals (source, drain, or gate). After the first patterning step, conducting polymers, such as poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), or semiconducting polymers, are spin-coated on the device surface. Another femtosecond laser patterning step subsequently defines the active polymer area contributing to the OECT performance by disconnecting the channel and gate from the surrounding spin-coated film. The effective OECT width can be defined with high resolution (down to 2 \u00b5m) in less than a second of exposure. Micropatterning the OECT channel area significantly improved the transistor switching performance in the case of PEDOT:PSS-based transistors, speeding up the devices by two orders of magnitude. The utility of this OECT manufacturing approach is demonstrated by fabricating complementary logic (inverters) and glucose biosensors, thereby showing its potential to accelerate OECT research.", "doi": "10.1002/advs.202307042", "pmid": "38225700", "labels": [], "xrefs": [{"db": "pmc", "key": "PMC11251563"}], "notes": [], "created": "2026-08-20T06:28:15.482Z", "modified": "2026-08-20T06:28:15.911Z"}]}