| Gigantic Enhancement in Sensitivity Using Schottky Contacted Nanowire Nanosensor | |
|---|---|
| 學年 | 97 |
| 學期 | 1 |
| 出版（發表）日期 | 2009-01-01 |
| 作品名稱 | Gigantic Enhancement in Sensitivity Using Schottky Contacted Nanowire Nanosensor |
| 作品名稱（其他語言） | |
| 著者 | Wei, Te-Yu; Yeh, Ping-Hung; Lu, Shih-Yuan; Wang, Zhong-Lin |
| 單位 | 淡江大學物理學系 |
| 出版者 | Washington, DC: American Chemical Society |
| 著錄名稱、卷期、頁數 | Journal of the American Chemical Society 131(48), pp.17690–17695 |
| 摘要 | A new single nanowire based nanosensor is demonstrated for illustrating its ultrahigh sensitivity for gas sensing. The device is composed of a single ZnO nanowire mounted on Pt electrodes with one end in Ohmic contact and the other end in Schottky contact. The Schottky contact functions as a “gate” that controls the current flowing through the entire system. By tuning the Schottky barrier height through the responsive variation of the surface chemisorbed gases and the amplification role played by the nanowire to Schottky barrier effect, an ultrahigh sensitivity of 32 000% was achieved using the Schottky contacted device operated in reverse bias mode at 275 °C for detection of 400 ppm CO, which is 4 orders of magnitude higher than that obtained using an Ohmic contact device under the same conditions. In addition, the response time and reset time have been shortened by a factor of 7. The methodology and principle illustrated in the paper present a new sensing mechanism that can be readily and extensively applied to other gas sensing systems. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0002-7863; 1520-5126 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/74840 ) |
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