螺旋桨状多组分微观结构：聚乙烯醇包覆的银和/或氧化亚铜纳米颗粒的自组装体

Propeller-like multicomponent microstructures: Self-assemblies of nanoparticles of poly(vinyl alcohol)-coated Ag and/or Cu2O.

作者信息

Wu Wei-Tai, Wang Yusong, Shi Lei, Pang Wenmin, Zhu Qingren, Xu Guoyong, Lu Fei

机构信息

Hefei National Laboratory for Physical Sciences at the Microscale, Structure Research Laboratory, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, China.

出版信息

J Phys Chem B. 2006 Aug 3;110(30):14702-8. doi: 10.1021/jp062121c.

DOI:10.1021/jp062121c

PMID:16869576

Abstract

Novel propeller-like multicomponent microstructures, which are actually self-assemblies of nanoparticles of poly(vinyl alcohol) (PVA)-coated Ag and/or Cu2O, were synthesized in aqueous solution of amphiphilic polyvinylacetone (PVKA) (ketalization degree D(H) = 0.549), via one-step in situ reduction of Ag+ and Cu2+ under gamma-ray irradiation, utilizing the low hydrolysis rate of PVKA in the dilute acidic solution. Herein, PVA chains are obtained from hydrolyzed PVKA. The reaction mechanism and the formation mechanism are proposed. The room temperature photoluminescence spectrum has also been applied to explore the optical property.

摘要

新型螺旋桨状多组分微观结构实际上是聚乙烯醇（PVA）包覆的Ag和/或Cu2O纳米颗粒的自组装体，其通过在两亲性聚乙烯基丙酮（PVKA）（缩酮化度D(H)=0.549）的水溶液中，利用PVKA在稀酸性溶液中的低水解速率，在γ射线辐照下对Ag+和Cu2+进行一步原位还原而合成。在此，PVA链由水解的PVKA获得。提出了反应机理和形成机理。室温光致发光光谱也被用于探究光学性质。