Selective degradation of chemical bonds: from single-source molecular precursors to metallic Ag and semiconducting A(g2)S nanocrystals via instant thermal activation
SCIE
SCOPUS
- Title
- Selective degradation of chemical bonds: from single-source molecular precursors to metallic Ag and semiconducting A(g2)S nanocrystals via instant thermal activation
- Authors
- Tang, Q; Yoon, SM; Yang, HJ; Lee, Y; Song, HJ; Byon, HR; Choi, HC
- Date Issued
- 2006-03-14
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Selective formation of metallic Ag and semiconducting Ag2S nanocrystals has been achieved via a modified hot-injection process from a single-source precursor molecule, Ag(SCOPh), which can potentially generate both [Ag] and [AgS] fragments simultaneously. When the precursor molecules are injected into a preheated reaction system at 160 degrees C, spherical Ag2S nanocrystals are directly obtained even without a molecular activator, such as alkylamines. Mixtures of Ag and Ag2S or pure metallic Ag nanocrystals are obtained if the precursor molecules are injected at lower than 160 degrees C or room temperature. These results are attributed to the direct transfer of thermal energies to precursor molecules, which are enough to dissociate S-C as well as Ag-S bonds simultaneously. Detailed characterizations about the produced nanocrystals have been performed using powder X-ray diffraction (XRD), transmission electron microscopy (TEM), as well as energy-dispersive X-ray (EDX) spectrum.
- Keywords
- SULFIDE NANOPARTICLES; ROUTE; SHAPE; SIZE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24142
- DOI
- 10.1021/LA053524R
- ISSN
- 0743-7463
- Article Type
- Article
- Citation
- LANGMUIR, vol. 22, no. 6, page. 2802 - 2805, 2006-03-14
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