{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T00:32:53Z","timestamp":1767918773025,"version":"3.49.0"},"reference-count":51,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2019,2,1]],"date-time":"2019-02-01T00:00:00Z","timestamp":1548979200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61671368; 61172041; 91123018; 61404103"],"award-info":[{"award-number":["61671368; 61172041; 91123018; 61404103"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Science and Technology on Analog Integrated Circuit Laboratory","award":["614280205040617"],"award-info":[{"award-number":["614280205040617"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Oxygen plasma treatment has been reported as an effective way of improving the response of graphene gas sensors. In this work, a gas sensor based on a composite graphene channel with a layer of pristine graphene (G) at the bottom and an oxygen plasma-treated graphene (OP-G) as a covering layer was reported. The OP-G on top provided oxygen functional groups and serves as the gas molecule grippers, while the as-grown graphene beneath serves as a fast carrier transport path. Thus, the composite channel (OP-G\/G) demonstrated significantly improved response in NH3 gas sensing tests compared with the pristine G channel. Moreover, the OP-G\/G channel showed faster response and recovering process than the OP-G channel. Since this kind of composite channel is fabricated from chemical vapor deposited graphene and patterned with standard photolithography, the device dimension was much smaller than a gas sensor fabricated from reduced graphene oxide and it is favorable for the integration of a large number of sensing units.<\/jats:p>","DOI":"10.3390\/s19030625","type":"journal-article","created":{"date-parts":[[2019,2,1]],"date-time":"2019-02-01T11:19:58Z","timestamp":1549019998000},"page":"625","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["A Gas Sensing Channel Composited with Pristine and Oxygen Plasma-Treated Graphene"],"prefix":"10.3390","volume":"19","author":[{"given":"Haiyang","family":"Wu","sequence":"first","affiliation":[{"name":"School of Microelectronics, School of Electronics and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}]},{"given":"Xiangrui","family":"Bu","sequence":"additional","affiliation":[{"name":"School of Microelectronics, School of Electronics and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}]},{"given":"Minming","family":"Deng","sequence":"additional","affiliation":[{"name":"Science and Technology on Analog Integrated Circuit Laboratory, Chongqing 401332, China"}]},{"given":"Guangbing","family":"Chen","sequence":"additional","affiliation":[{"name":"Science and Technology on Analog Integrated Circuit Laboratory, Chongqing 401332, China"}]},{"given":"Guohe","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Microelectronics, School of Electronics and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}]},{"given":"Xin","family":"Li","sequence":"additional","affiliation":[{"name":"School of Microelectronics, School of Electronics and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"Guangdong Shunde Xi\u2019an Jiaotong University Academy, NO.3 Deshengdong Road, Daliang, Shunde District, Foshan 528300, China"}]},{"given":"Xiaoli","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Microelectronics, School of Electronics and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"School of Science, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5748-3021","authenticated-orcid":false,"given":"Weihua","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Microelectronics, School of Electronics and Information Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Department of Electronic Science and Technology, School of Electronic and Information Engineering, Xi\u2019an Jiaotong University, 28 West Xianning Road, Xi\u2019an 710049, China"},{"name":"Research institute of Xi\u2019an Jiaotong University (Zhejiang), Hangzhou, Zhejiang 311215, China"}]}],"member":"1968","published-online":{"date-parts":[[2019,2,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"381","DOI":"10.1016\/j.snb.2011.10.048","article-title":"Discrimination and prediction of multiple beef freshness indexes based on electronic nose","volume":"161","author":"Hong","year":"2012","journal-title":"Sens. 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