{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T10:45:28Z","timestamp":1768733128774,"version":"3.49.0"},"reference-count":18,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2012,2,27]],"date-time":"2012-02-27T00:00:00Z","timestamp":1330300800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We have implemented a tin-oxide-decorated carbon nanotube (CNT) network gas sensor system on a single die. We have also demonstrated the deposition of metallic tin on the CNT network, its subsequent oxidation in air, and the improvement of the lifetime of the sensors. The fabricated array of CNT sensors contains 128 sensor cells for added redundancy and increased accuracy. The read-out integrated circuit (ROIC) was combined with coarse and fine time-to-digital converters to extend its resolution in a power-efficient way. The ROIC is fabricated using a 0.35 \u00b5m CMOS process, and the whole sensor system consumes 30 mA at 5 V. The sensor system was successfully tested in the detection of ammonia gas at elevated temperatures.<\/jats:p>","DOI":"10.3390\/s120302582","type":"journal-article","created":{"date-parts":[[2012,2,27]],"date-time":"2012-02-27T11:44:40Z","timestamp":1330343080000},"page":"2582-2597","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Integrating Metal-Oxide-Decorated CNT Networks with a CMOS Readout in a Gas Sensor"],"prefix":"10.3390","volume":"12","author":[{"given":"Hyunjoong","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Seoul National University, Seoul, 151-744, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sanghoon","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Seoul National University, Seoul, 151-744, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dai-Hong","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David","family":"Perello","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Young June","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Seoul National University, Seoul, 151-744, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seong-Hyeon","family":"Hong","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Minhee","family":"Yun","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Suhwan","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Seoul National University, Seoul, 151-744, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2012,2,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1038\/354056a0","article-title":"Helical microtubules of graphitic carbon","volume":"354","author":"Iijima","year":"1991","journal-title":"Nature"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"622","DOI":"10.1126\/science.287.5453.622","article-title":"Nanotube molecular wires as chemical sensors","volume":"287","author":"Kong","year":"2000","journal-title":"Science"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1801","DOI":"10.1126\/science.287.5459.1801","article-title":"Extreme oxygen sensitivity of electronic properties of carbon nanotubes","volume":"287","author":"Collins","year":"2000","journal-title":"Science"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Zhang, T., Mubeen, S., Myung, N.V., and Deshusses, M.A. (2008). 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