{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T18:38:43Z","timestamp":1771007923302,"version":"3.50.1"},"reference-count":82,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,3,8]],"date-time":"2023-03-08T00:00:00Z","timestamp":1678233600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["UIDP\/04540\/2020"],"award-info":[{"award-number":["UIDP\/04540\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemosensors"],"abstract":"<jats:p>This work proposes a high-performance asymmetric gold\/graphene\/platinum photodetector. The new photodetector, operating without bias, integrates interdigitated 100 nm spaced metallic contacts that induce a built-in potential and a short carrier path, allowing an improvement in the separation and collection of the photocarriers. A chemical vapor deposition graphene layer is transferred onto the interdigitated electrodes elaborated using high-resolution electron-beam lithography. Three devices with different side dimensions (100, 1000, and 3000 \u00b5m) are fabricated, and their photoresponsivities are evaluated at different wavelengths. The 100 \u00b5m device shows the highest photoresponsivity of 358 A\/W at a 400 nm illumination. These promising results confirm the proposed design\u2019s ability to increase the photodetector\u2019s active area, improve light absorption, and achieve high separation and collection of photogenerated carriers. This makes it of great interest for optoelectronic applications.<\/jats:p>","DOI":"10.3390\/chemosensors11030181","type":"journal-article","created":{"date-parts":[[2023,3,8]],"date-time":"2023-03-08T05:01:12Z","timestamp":1678251672000},"page":"181","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Graphene Nanogap Interdigitated Asymmetric Electrodes for Photodetection"],"prefix":"10.3390","volume":"11","author":[{"given":"Rabiaa","family":"Elkarous","sequence":"first","affiliation":[{"name":"Laboratory of Nanomaterials and Systems for Renewable Energies (LaNSER), Research and Technology Centre of Energy (CRTEn), Borj Cedria Science and Technology Park, Hammam-Lif 2050, Tunisia"},{"name":"Faculty of Sciences of Tunis (FST), Campus Universitaire El Manar, University of Tunis El Manar, Tunis 2092, Tunisia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3295-7897","authenticated-orcid":false,"given":"Afrah","family":"Bardaoui","sequence":"additional","affiliation":[{"name":"Laboratory of Nanomaterials and Systems for Renewable Energies (LaNSER), Research and Technology Centre of Energy (CRTEn), Borj Cedria Science and Technology Park, Hammam-Lif 2050, Tunisia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5622-7760","authenticated-orcid":false,"given":"J\u00e9r\u00f4me","family":"Borme","sequence":"additional","affiliation":[{"name":"2D Materials and Devices Group, International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal"}]},{"given":"Nabil","family":"Sghaier","sequence":"additional","affiliation":[{"name":"Laboratory of Nanomaterials and Systems for Renewable Energies (LaNSER), Research and Technology Centre of Energy (CRTEn), Borj Cedria Science and Technology Park, Hammam-Lif 2050, Tunisia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9875-6188","authenticated-orcid":false,"given":"Pedro","family":"Alpuim","sequence":"additional","affiliation":[{"name":"2D Materials and Devices Group, International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal"},{"name":"Department of Physics, University of Minho, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7920-2638","authenticated-orcid":false,"given":"Diogo M. F.","family":"Santos","sequence":"additional","affiliation":[{"name":"Center of Physics and Engineering of Advanced Materials, Laboratory for Physics of Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"given":"Radhouane","family":"Chtourou","sequence":"additional","affiliation":[{"name":"Laboratory of Nanomaterials and Systems for Renewable Energies (LaNSER), Research and Technology Centre of Energy (CRTEn), Borj Cedria Science and Technology Park, Hammam-Lif 2050, Tunisia"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1038\/nmat1849","article-title":"The rise of graphene","volume":"6","author":"Geim","year":"2007","journal-title":"Nat. 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