| Автор | Lee, Minbaek |
| Автор | Lee, Joohyung |
| Автор | Kim, Tae Hyun |
| Автор | Lee, Hyungwoo |
| Автор | Lee, Byung Yang |
| Автор | Park, June |
| Автор | Jhon, Young Min |
| Автор | Seong, Maeng-Je |
| Автор | Hong, Seunghun |
| Дата выпуска | 2010-02-05 |
| dc.description | Nanoscale sensors based on single-walled carbon nanotube (SWNT) networks have been considered impractical due to several fundamental limitations such as a poor sensitivity and small signal-to-noise ratio. Herein, we present a strategy to overcome these fundamental problems and build highly-sensitive low-noise nanoscale sensors simply by controlling the structure of the SWNT networks. In this strategy, we prepared nanoscale width channels based on aligned SWNT networks using a directed assembly strategy. Significantly, the aligned network-based sensors with narrower channels exhibited even better signal-to-noise ratio than those with wider channels, which is opposite to conventional random network-based sensors. As a proof of concept, we demonstrated 100 nm scale low-noise sensors to detect mercury ions with the detection limit of ∼1 pM, which is superior to any state-of-the-art portable detection system and is below the allowable limit of mercury ions in drinking water set by most government environmental protection agencies. This is the first demonstration of 100 nm scale low-noise sensors based on SWNT networks. Considering the increased interests in high-density sensor arrays for healthcare and environmental protection, our strategy should have a significant impact on various industrial applications. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | IOP Publishing Ltd |
| Название | 100 nm scale low-noise sensors based on aligned carbon nanotube networks: overcoming the fundamental limitation of network-based sensors |
| Тип | paper |
| DOI | 10.1088/0957-4484/21/5/055504 |
| Electronic ISSN | 1361-6528 |
| Print ISSN | 0957-4484 |
| Журнал | Nanotechnology |
| Том | 21 |
| Первая страница | 55504 |
| Последняя страница | 55511 |
| Аффилиация | Lee, Minbaek; Department of Physics and Astronomy, Seoul National University, Shilim-Dong, Kwanak-Gu, Seoul 151-742, Korea |
| Аффилиация | Lee, Joohyung; Department of Physics and Astronomy, Seoul National University, Shilim-Dong, Kwanak-Gu, Seoul 151-742, Korea |
| Аффилиация | Kim, Tae Hyun; Department of Physics and Astronomy, Seoul National University, Shilim-Dong, Kwanak-Gu, Seoul 151-742, Korea |
| Аффилиация | Lee, Hyungwoo; Department of Physics and Astronomy, Seoul National University, Shilim-Dong, Kwanak-Gu, Seoul 151-742, Korea |
| Аффилиация | Lee, Byung Yang; Department of Physics and Astronomy, Seoul National University, Shilim-Dong, Kwanak-Gu, Seoul 151-742, Korea |
| Аффилиация | Park, June; Department of Physics, Chung-Ang University, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, Korea |
| Аффилиация | Jhon, Young Min; Korea Institute of Science and Technology, Hawolgok-Dong, Seongbuk-Gu, Seoul 136-791, Korea |
| Аффилиация | Seong, Maeng-Je; Department of Physics, Chung-Ang University, Heukseok-Dong, Dongjak-Gu, Seoul 156-756, Korea |
| Аффилиация | Hong, Seunghun; Department of Physics and Astronomy, Seoul National University, Shilim-Dong, Kwanak-Gu, Seoul 151-742, Korea ; Department of Biophysics and Chemical Biology, Seoul National University, Shilim-Dong, Kwanak-Gu, Seoul 151-742, Korea |
| Выпуск | 5 |
