THE PREPARATION OF(AgBr)core·(Ag)shell NANOPARTICLE AND ITS RESONANCE SCATTERING SPECTROSCOPIC STUDY

doi:10.7517/j.issn.1674-0475.2002.06.429

Abstract

Abstract: Under the conditions of (AgBr)_m crystal seed and tri sodium citrate photoreducer,the Ag⁺ ions on the surface of (AgBr)_m crystal seed reduce to Ag photochemically.And thus soil red (AgBr)_core·(Ag)_shell nanoparticles were obtained.The mean diameter is 25 nm for (AgBr)_core·(Ag)_shell and 100 nm for (AgBr)_m .It exhibits a strongest resonance scattering peak at 512 nm,and an absorption peak at 410 nm.The effect of illumination time,AgNO₃,NaBr and tri sodium citrate concentration on the I_{512 nm},and A_{410 nm} has been studied.The results indicate that the formation of (AgBr)_core·(Ag)_shell nanoparticle is the fundamental cause for the appearence of resonance scattering peak at 512 nm.

Key words: liquid(AgBr)_core·(Ag)_shell nanoparticle, potochemical approach, resonance scattering spectrum

CLC Number:

LING Shao-ming, TAN Li-sheng, SHEN Wen-wen, LONG Jin-qiao. THE PREPARATION OF(AgBr)_core·(Ag)_shell NANOPARTICLE AND ITS RESONANCE SCATTERING SPECTROSCOPIC STUDY[J]. Imaging Science and Photochemistry, 2002, 20(6): 429-434.

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THE PREPARATION OF(AgBr)_core·(Ag)_shell NANOPARTICLE AND ITS RESONANCE SCATTERING SPECTROSCOPIC STUDY

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