L-Cysteine-Assisted Synthesis and Optical Properties of Ag2S Nanospheres
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- 作者：Junhua Xiang ; Huaqiang Cao ; Qingzhi Wu ; Sichun Zhang ; Xinrong Zhang ; Andrew A. R. Watt
- 刊名：Journal of Physical Chemistry C
- 出版年：2008
- 出版时间：March 13, 2008
- 年：2008
- 卷：112
- 期：10
- 页码：3580 - 3584
- 全文大小：242K
- 年卷期：v.112,no.10(March 13, 2008)
- ISSN：1932-7455
文摘
Ag2S nanospheres were synthesized by a hydrothermal reaction using L-cysteine as the sulfur source andchelating reagent. The X-ray diffraction patterns and X-ray photoelectron spectra confirmed that the productswere monoclinic 
-Ag2S. The optical absorption spectra of the Ag2S nanospheres showed very broad absorptionpeaks centered at about 515 nm in wavelength. Photoluminescence spectra exhibited emission peaks centeredat ~637 nm in wavelength accompanied by weaker shoulder peaks at ~590 nm in wavelength when thesample was excited with a wavelength of 490 nm. In addition, the formation mechanism of the Ag2Snanospheres was also determined. The l-cysteine-assisted hydrothermal route using L-cysteine as the sulfursource and chelating reagent provides an alternative approach to generate sulfide nanocrystals.
-Ag2S. The optical absorption spectra of the Ag2S nanospheres showed very broad absorptionpeaks centered at about 515 nm in wavelength. Photoluminescence spectra exhibited emission peaks centeredat ~637 nm in wavelength accompanied by weaker shoulder peaks at ~590 nm in wavelength when thesample was excited with a wavelength of 490 nm. In addition, the formation mechanism of the Ag2Snanospheres was also determined. The l-cysteine-assisted hydrothermal route using L-cysteine as the sulfursource and chelating reagent provides an alternative approach to generate sulfide nanocrystals.