Electrochemical mechanism of silver nanoprisms transformation in aqueous solutions containing the halide ions

被引：9
作者：
Abkhalimov, E. V. [1 ]
Timofeev, A. A. [2 ]
Ershov, B. G. [1 ]
机构：
[1] Russian Acad Sci, AN Frumkin Inst Phys Chem & Electrochem, Leninsky Pr 31-4, Moscow 119071, Russia
[2] Natl Res Nucl Univ MEPhI, Kashirskoe Highway 31, Moscow 115409, Russia
来源：
JOURNAL OF NANOPARTICLE RESEARCH | 2018年 / 20卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
Silver nanoparticle; Electrochemical mechanism; Halide ion; Transformation; Induction period; Nanoparticle shape change; SURFACE-PLASMON-RESONANCE; ENHANCED FLUORESCENCE; SHAPE EVOLUTION; NANOPARTICLES; CONVERSION; SENSOR; SPECTROSCOPY; ELECTRONICS; EXCITATION; CATALYSTS;
D O I：
10.1007/s11051-018-4133-6
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The transformation process of 20-50 nm silver nanoprisms in the presence of Cl-, Br-, and I-ions was studied. The threshold concentrations of halide ions that initiate the transformation do not depend on the size of nanoprisms. It was shown that the structure change is caused by the formation of poorly soluble silver complexes on nanoprisms and occurs by an electrochemical mechanism. The induction period preceding the onset of shape transformation is related to the formation of silver halide nanoelectrodes. The electrochemical reactions involving silver and silver halide nanoelectrodes induce restructuring of silver particles the efficiency of which is determined by electrode potentials.
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页数：12
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