https://scholars.lib.ntu.edu.tw/handle/123456789/629479
Title: | Preparation of fluorescent tellurium nanowires at room temperature | Authors: | ZONG-HONG LIN Yang, ZS HUAN-TSUNG CHANG |
Keywords: | CRYSTALLINE TELLURIUM; NANORODS; NANOTUBES; GROWTH; NANOBELTS; NANOSTRUCTURES; SURFACES; LIQUIDS | Issue Date: | 2008 | Publisher: | AMER CHEMICAL SOC | Journal Volume: | 8 | Journal Issue: | 1 | Start page/Pages: | 351 | Source: | CRYSTAL GROWTH & DESIGN | Abstract: | We have demonstrated a simple approach to the synthesis of fluorescent trigonal tellurium (t-Te) nanowires in aqueous solution at room temperature. The t-Te nanowires were prepared from the reduction of tellurium dioxide (TeO 2) with concentrated hydrazine solution through deposition of Te atoms that were reduced from telluride ions (Te2-) and dissolved from amorphous tellurium (a-Te) nanoparticles onto t-Te nanocrystallines. By carefully controlling the growth time from 40 to 120 min, we prepared different sizes of t-Te nanowires; the length changed from 251 to 879 nm, while the diameter only grew from 8 to 19 nm. The absorption wavelength against the diameter of t-Te nanowires displays the diameter dependence of band I (<300 nm). On the other hand, the absorption wavelength against the length of t-Te nanowires displays the length dependence of band II (>600 nm). By increasing the size of t-Te nanowires, their absorption is under a red shift. For example, the maximum wavelengths of the absorption bands for the t-Te nanowires with the lengths of 251 nm are 271 and 602 nm, while those for 879 nm t-Te nanowires are at 280 and 687 nm, respectively. Deconvolution of the photoluminescence profile for t-Te nanowires obtained at 120 min yields four Gaussian peaks centered at 334, 397, 460, and 507 nm. © 2008 American Chemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/629479 | ISSN: | 1528-7483 | DOI: | 10.1021/cg070357f |
Appears in Collections: | 醫學工程學研究所 |
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