Preparation of water dispersible, fluorescent Ag-PAA-PVP hybrid nanogels and their optical properties
Preparation of water dispersible, fluorescent Ag-PAA-PVP hybrid nanogels and their optical properties
复制标题
水分散性荧光Ag-PAA-PVP杂化纳米凝胶的制备及其光学性能
DOI：
10.1016/j.apt.2013.04.006
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发表时间：
2014-01-01
影响因子：
5.2
通讯作者：
Hu, Yong
中科院分区：
文献类型：
--
作者：
Ding, Yin;Gao, Jian;Hu, Yong
以聚乙烯吡咯烷酮（PVP）溶液为溶剂，通过原位还原聚丙烯酸-聚乙烯吡咯烷酮（PAA-PVP）纳米凝胶中的Ag+，制备了银-聚丙烯酸-聚乙烯吡咯烷酮（Ag-PAA-PVP）杂化纳米凝胶。由于Ag+与PAA的酸性质子发生离子交换，PAA-PVP纳米凝胶内部形成稳定的Ag+团簇，抗坏血酸还原Ag+得到杂化纳米凝胶。透射电子显微镜（TEM）图像清楚地显示了银纳米粒子的存在内的Ag-PAA-PVP纳米凝胶。这些杂化纳米凝胶在420 nm附近显示出典型的表面等离子体共振吸收峰，并且通过增加Ag+的进料量可以将Ag-PAA-PVP纳米凝胶中银纳米颗粒的尺寸控制在9.5 ± 1.6 nm到1.9 ± 0.4 nm之间。此外，这些杂化纳米凝胶在荧光光谱中表现出光致发光特性。考虑到这些杂化纳米凝胶的pH敏感特性，它们将在药物递送和生物医学成像系统中具有潜在的应用。+/- 2013日本粉末技术学会。由Elsevier B. V.和日本粉末技术协会出版。All rights reserved.
A simple method of synthesizing hybrid silver-polyacrylic acid-poly(N-vinylpyrrolidone) (Ag-PAA-PVP) nanogels was demonstrated through in situ reducing Ag+ inside PAA-PVP nanogels, which were formed by polymerization of acrylic acid in the PVP solution. Due to the ion exchange between Ag+ and acid protons of PAA, stable Ag+ clusters were formed inside the PAA-PVP nanogels, and hybrid nanogels were obtained by reducing Ag+ by ascorbic acid. Transmission electronic microscopic (TEM) images clearly showed the existence of silver nanoparticles inside the Ag-PAA-PVP nanogels. These hybrid nanogels showed typical surface plasma resonance absorption peak around 420 nm, and the size of the silver nanoparticles inside the Ag-PAA-PVP nanogels could be controlled from 9.5 +/- 1.6 nm to 1.9 +/- 0.4 nm by increasing the feeding amount of Ag+. In addition, these hybrid nanogels showed photoluminescent properties in fluorescent spectra. Considering the pH sensitive property of these hybrid nanogels, they will have potential application in drug delivery and biomedical imaging systems. +/- 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.