Photoluminescence (PL) and optical absorption (OA) of single-wall carbon nanotube (CNT) thin films are shown to substantially change after exposure to NO 2 or NH 3 gas. These films prepared by dipcoating in surfactant-aided CNT dispersions consist of unbundled and well-exposed tubes; the former property enables the detection of PL, a task difficult for bundled CNTs, while the latter enlarges the effective surface area available for gas adsorption. The observed changes correspond well to those in electrical resistance, which are consistently explained by charge transfer between the CNTs and the gas molecules. Highly resolved spectral peaks in two-dimensional PL excitation contour maps and their changes induced by the gas exposure revealed that wider tubes are more sensitive to gas adsorption.
提供商 |
北京東方德菲儀器有限公司 | 下載次數(shù) |
100次 |
資料大小 |
412.8KB | 資料類型 |
PDF 文件 |
資料圖片 |
-- | 瀏覽次數(shù) |
865次 |
(空格分隔,最多3個(gè),單個(gè)標(biāo)簽最多10個(gè)字符)
會(huì)員.png)
20
立即詢價(jià)
您提交后，專屬客服將第一時(shí)間為您服務(wù)