Preparation and surfaceenhanced Raman scattering activity of silver microspheres with woolen-ball-like surfaces

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Journal of Beijing University of Chemical Technology ›› 2013, Vol. 40 ›› Issue (5) : 78-83.

材料科学与工程

WANG XiaoYu;GE XuePing;FANG Bin;LIANG Ying;YANG CunZhong

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Silver microspheres with woolen-ball-like surfaces have been prepared by a chemical reduction method using lowmolecular weight polyacrylamide (PAM) as the surfactant. The morphology and dispersion of the product were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and nitrogen adsorption measurements. The results showed that the silver microspheres with numerous edges and corners over their surfaces were mesoporous materials, and consisted of various low-dimensional nanosheets. Varying the molecular weight of PAM, the concentration of silver nitrate and the pH value of the reduction system all had an impact on the silver structures. The probable growth process of the woolen-ball-like surface is presented. These silver substrates significantly amplified the Raman signals of rhodamine B (Rh B) in surfaceenhanced Raman scattering (SERS) spectroscopy. SERS showed that the detection limit for Rh B was as low as 10^-16mol/L.

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WANG XiaoYu;GE XuePing;FANG Bin;LIANG Ying;YANG CunZhong. Preparation and surfaceenhanced Raman scattering activity of silver microspheres with woolen-ball-like surfaces[J]. Journal of Beijing University of Chemical Technology, 2013, 40(5): 78-83

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Received	Revised	Published
2013-05-24	1900-01-01	2013-09-20
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2013-09-20

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