{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T11:01:33Z","timestamp":1776769293612,"version":"3.51.2"},"reference-count":37,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2021,12,3]],"date-time":"2021-12-03T00:00:00Z","timestamp":1638489600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005802","name":"Ministerul Cercet\u0103rii \u0219i Inov\u0103rii","doi-asserted-by":"publisher","award":["M-ERA.NET 109\/2019 (ERANET-M.-2D-SPIN-MEM)"],"award-info":[{"award-number":["M-ERA.NET 109\/2019 (ERANET-M.-2D-SPIN-MEM)"]}],"id":[{"id":"10.13039\/501100005802","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005802","name":"Ministerul Cercet\u0103rii \u0219i Inov\u0103rii","doi-asserted-by":"publisher","award":["EEA 39\/2021-TEESM"],"award-info":[{"award-number":["EEA 39\/2021-TEESM"]}],"id":[{"id":"10.13039\/501100005802","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Nanoscale thermometers with high sensitivity are needed in domains which study quantum and classical effects at cryogenic temperatures. Here, we present a micrometer sized and nanometer thick chromium selenide cryogenic temperature sensor capable of measuring a large domain of cryogenic temperatures down to tenths of K. Hexagonal Cr-Se flakes were obtained by a simple physical vapor transport method and investigated using scanning electron microscopy, energy dispersive X-ray spectrometry and X-ray photoelectron spectroscopy measurements. The flakes were transferred onto Au contacts using a dry transfer method and resistivity measurements were performed in a temperature range from 7 K to 300 K. The collected data have been fitted by exponential functions. The excellent fit quality allowed for the further extrapolation of resistivity values down to tenths of K. It has been shown that the logarithmic sensitivity of the sensor computed over a large domain of cryogenic temperature is higher than the sensitivity of thermometers commonly used in industry and research. This study opens the way to produce Cr-Se sensors for classical and quantum cryogenic measurements.<\/jats:p>","DOI":"10.3390\/s21238084","type":"journal-article","created":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T03:10:38Z","timestamp":1638760238000},"page":"8084","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Micrometer Sized Hexagonal Chromium Selenide Flakes for Cryogenic Temperature Sensors"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3087-5812","authenticated-orcid":false,"given":"Angel-Theodor","family":"Buruiana","sequence":"first","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"},{"name":"Faculty of Physics, University of Bucharest, 405 Atomi\u0219tilor Street, P.O. Box MG-11, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Florinel","family":"Sava","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3375-1225","authenticated-orcid":false,"given":"Nicusor","family":"Iacob","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8387-2562","authenticated-orcid":false,"given":"Elena","family":"Matei","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amelia Elena","family":"Bocirnea","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0111-7414","authenticated-orcid":false,"given":"Melania","family":"Onea","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"},{"name":"Faculty of Physics, University of Bucharest, 405 Atomi\u0219tilor Street, P.O. Box MG-11, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1914-4210","authenticated-orcid":false,"given":"Aurelian-Catalin","family":"Galca","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2816-3165","authenticated-orcid":false,"given":"Claudia","family":"Mihai","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6851-2991","authenticated-orcid":false,"given":"Alin","family":"Velea","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3076-0110","authenticated-orcid":false,"given":"Victor","family":"Kuncser","sequence":"additional","affiliation":[{"name":"National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1038\/nphys3169","article-title":"Towards quantum thermodynamics in electronic circuits","volume":"11","author":"Pekola","year":"2015","journal-title":"Nat. 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