Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance
Recently, high-resolution patterned metal oxide semiconductors (MOS) have gained considerable attention for enhanced gas sensing performance due to their polycrystalline nature, ultrasmall grain size (~5 nm), patternable properties, and high surface-to-volume ratio. Herein, we significantly enhanced...
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| Format: | Article |
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MDPI AG
2018-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/18/12/4438 |
| _version_ | 1798042452928495616 |
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| author | Ju Ye Kim Soo-Yeon Cho Hee-Tae Jung |
| author_facet | Ju Ye Kim Soo-Yeon Cho Hee-Tae Jung |
| author_sort | Ju Ye Kim |
| collection | DOAJ |
| description | Recently, high-resolution patterned metal oxide semiconductors (MOS) have gained considerable attention for enhanced gas sensing performance due to their polycrystalline nature, ultrasmall grain size (~5 nm), patternable properties, and high surface-to-volume ratio. Herein, we significantly enhanced the sensing performance of that patterned MOS by galvanic replacement, which allows for selective functionalization on ultrathin Cu<sub>2</sub>O nanopatterns. Based on the reduction potential energy difference between the base channel material (Cu<sub>2</sub>O) and the decorated metal ion (Pt<sup>2+</sup>), Pt could be selectively and precisely decorated onto the desired area of the Cu<sub>2</sub>O nanochannel array. Overall, the Pt-decorated Cu<sub>2</sub>O exhibited 11-fold higher NO<sub>2</sub> (100 ppm) sensing sensitivity as compared to the non-decorated sensing channel, the while the channel device with excessive Pt doping showed complete loss of sensing properties. |
| first_indexed | 2024-04-11T22:35:45Z |
| format | Article |
| id | doaj.art-619aa75d0e6a4d1ca33e38ffc74fe56a |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:35:45Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-619aa75d0e6a4d1ca33e38ffc74fe56a2022-12-22T03:59:13ZengMDPI AGSensors1424-82202018-12-011812443810.3390/s18124438s18124438Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing PerformanceJu Ye Kim0Soo-Yeon Cho1Hee-Tae Jung2Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, KoreaDepartment of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, KoreaDepartment of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, KoreaRecently, high-resolution patterned metal oxide semiconductors (MOS) have gained considerable attention for enhanced gas sensing performance due to their polycrystalline nature, ultrasmall grain size (~5 nm), patternable properties, and high surface-to-volume ratio. Herein, we significantly enhanced the sensing performance of that patterned MOS by galvanic replacement, which allows for selective functionalization on ultrathin Cu<sub>2</sub>O nanopatterns. Based on the reduction potential energy difference between the base channel material (Cu<sub>2</sub>O) and the decorated metal ion (Pt<sup>2+</sup>), Pt could be selectively and precisely decorated onto the desired area of the Cu<sub>2</sub>O nanochannel array. Overall, the Pt-decorated Cu<sub>2</sub>O exhibited 11-fold higher NO<sub>2</sub> (100 ppm) sensing sensitivity as compared to the non-decorated sensing channel, the while the channel device with excessive Pt doping showed complete loss of sensing properties.https://www.mdpi.com/1424-8220/18/12/4438gas sensornanopatternchemical sensitizationgalvanic replacementp-type metal oxidehigh-resolution |
| spellingShingle | Ju Ye Kim Soo-Yeon Cho Hee-Tae Jung Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance Sensors gas sensor nanopattern chemical sensitization galvanic replacement p-type metal oxide high-resolution |
| title | Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance |
| title_full | Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance |
| title_fullStr | Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance |
| title_full_unstemmed | Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance |
| title_short | Selective Functionalization of High-Resolution Cu<sub>2</sub>O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance |
| title_sort | selective functionalization of high resolution cu sub 2 sub o nanopatterns via galvanic replacement for highly enhanced gas sensing performance |
| topic | gas sensor nanopattern chemical sensitization galvanic replacement p-type metal oxide high-resolution |
| url | https://www.mdpi.com/1424-8220/18/12/4438 |
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