Djoković Vladimir, Krsmanović Radenka, Bozanić Dusan K, McPherson Michael, Van Tendeloo Gustaaf, Nair P Sreekumari, Georges Michael K, Radhakrishnan Thottackad
Vinca Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia.
Colloids Surf B Biointerfaces. 2009 Oct 1;73(1):30-5. doi: 10.1016/j.colsurfb.2009.04.022. Epub 2009 May 4.
Adsorption of sulfide ions onto a surface of starch capped silver nanoparticles upon addition of thioacetamide was investigated. UV-vis absorption spectroscopy revealed that the adsorption of the sulfide ion on the surface of the silver nanoparticles induced damping as well as blue shift of the silver surface plasmon resonance band. Further increase in thioacetamide concentration led to shift of the resonance band toward higher wavelengths indicating the formation of the continuous Ag2S layer on the silver surface. Thus fabricated nanoparticles were investigated using electron microscopy techniques (TEM, HRTEM, and HAADF-STEM) and X-ray photoelectron spectroscopy (XPS), which confirmed their core-shell structure.
研究了在加入硫代乙酰胺后，硫化物离子在淀粉包覆的银纳米颗粒表面的吸附情况。紫外可见吸收光谱表明，硫化物离子在银纳米颗粒表面的吸附导致银表面等离子体共振带的衰减以及蓝移。硫代乙酰胺浓度的进一步增加导致共振带向更高波长移动，这表明在银表面形成了连续的硫化银层。使用电子显微镜技术（透射电子显微镜、高分辨率透射电子显微镜和高角度环形暗场扫描透射电子显微镜）和X射线光电子能谱（XPS）对如此制备的纳米颗粒进行了研究，证实了它们的核壳结构。
