{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T23:44:05Z","timestamp":1792107845194,"version":"4.4.0"},"reference-count":0,"publisher":"IOP Publishing","license":[{"start":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T00:00:00Z","timestamp":1792022400000},"content-version":"am","delay-in-days":0,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/iop-standard\/v1"},{"start":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T00:00:00Z","timestamp":1792022400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Jpn. J. Appl. Phys."],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Molecular orientation in organic semiconductors has conventionally been evaluated using macroscopic methods such as X-ray analysis. However, it has been difficult to directly evaluate the orientation of charge-carrying molecules under device operating conditions. In the present study, we determined the orientations of anti- and syn-dimethylanthradithiophene (DMADT) by applying operando electron spin resonance (ESR) method to their organic transistors. The molecular orientations were determined by combining observed anisotropic g-factors in angle-dependent ESR spectra and theoretical g-tensor calculated by a density functional theory (DFT) method. We clarified that both anti- and syn-DMADT took end-on orientation on substrate. It was also revealed that molecules were more tilted relative to the substrate in the anti-isomer than in the syn-isomer. These results are consistent with previous X-ray analyses. This work demonstrates that the operando ESR spectroscopy is an effective approach for evaluating the molecular orientation of charge carriers in organic semiconductor devices.<\/jats:p>","DOI":"10.35848\/1347-4065\/aeb4c3","type":"journal-article","created":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T22:48:53Z","timestamp":1792104533000},"source":"Crossref","is-referenced-by-count":0,"title":["Microscopic elucidation of molecular orientations in\n                    <i>anti<\/i>\n                    - and\n                    <i>syn<\/i>\n                    -anthradithiophene derivative organic semiconductors via operando ESR"],"prefix":"10.35848","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-5373-8984","authenticated-orcid":false,"given":"Wakaba","family":"Somiya","sequence":"first","affiliation":[{"name":"University of Tsukuba Degree Programs in Pure and Applied Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-4303-3614","authenticated-orcid":false,"given":"WENHAO","family":"HE","sequence":"additional","affiliation":[{"name":"University of Tsukuba"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8108-2244","authenticated-orcid":false,"given":"Yukihiro","family":"Shimoi","sequence":"additional","affiliation":[{"name":"University of Tsukuba"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9792-0775","authenticated-orcid":false,"given":"Kazuhiro","family":"MARUMOTO","sequence":"additional","affiliation":[{"name":"University of Tsukuba"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,10,15]]},"container-title":["Japanese Journal of Applied Physics"],"original-title":[],"link":[{"URL":"https:\/\/iopscience.iop.org\/article\/10.35848\/1347-4065\/aeb4c3","content-type":"text\/html","content-version":"am","intended-application":"text-mining"},{"URL":"https:\/\/iopscience.iop.org\/article\/10.35848\/1347-4065\/aeb4c3\/pdf","content-type":"application\/pdf","content-version":"am","intended-application":"text-mining"},{"URL":"https:\/\/iopscience.iop.org\/article\/10.35848\/1347-4065\/aeb4c3\/pdf","content-type":"application\/pdf","content-version":"am","intended-application":"syndication"},{"URL":"https:\/\/iopscience.iop.org\/article\/10.35848\/1347-4065\/aeb4c3\/pdf","content-type":"application\/pdf","content-version":"am","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T22:48:53Z","timestamp":1792104533000},"score":1,"resource":{"primary":{"URL":"https:\/\/iopscience.iop.org\/article\/10.35848\/1347-4065\/aeb4c3"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,10,15]]},"references-count":0,"URL":"https:\/\/doi.org\/10.35848\/1347-4065\/aeb4c3","relation":{},"ISSN":["0021-4922","1347-4065"],"issn-type":[{"value":"0021-4922","type":"print"},{"value":"1347-4065","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,10,15]]}}}