SILVER NANOPARTICLES FORMED IN A COLLOIDAL SYSTEM AND A POLYMER MATRIX

被引：0
|
作者：
Potapov, A. L. [1 ]
Agabekov, V. E. [1 ]
Belyi, V. N. [2 ]
机构：
[1] Natl Acad Sci Belarus, Inst Chem New Mat, 36 F Skaryna Str, Minsk 220141, BELARUS
[2] Natl Acad Sci Belarus, BI Stepanov Inst Phys, Minsk, BELARUS
来源：
JOURNAL OF APPLIED SPECTROSCOPY | 2018年 / 85卷 / 02期
关键词：
Ag nanoparticles; surface plasmon absorption; polyvinyl alcohol; UV irradiation; ultrasound; NANOPRISMS; REDUCTION; CLUSTERS; LIGHT;
D O I：
10.1007/s10812-018-0646-0
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The growth kinetics and particle-size distribution of Ag particles in a polyvinyl alcohol (PVA) composite, PVA film, and aqueous sol were studied using UV and visible spectroscopy, atomic force microscopy, and dynamic light scattering. A hypsochromic shift (55 nm) of the Ag nanoparticle (NP) surface plasmon absorption maximum was measured on going from the PVA composite to the film. The kinetics of Ag NP formation and their sizes were shown to depend considerably on UV irradiation, ultrasound action, and PVA concentration. It was established that UV irradiation accelerated Ag NP formation in the presence of reductants and destroyed the resulting NPs with a deficit of reductant. Partial destruction of the Ag NPs occurred under the influence of ultrasound whereas ultrasound action after UV irradiation reduced Ag+ on the clusters.
引用
收藏
页码：287 / 294
页数：8
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