Fusion Growth of Gold Nanoparticles Induced by the Conformational Change of a Thermoresponsive Polymer Studied by Distance Distribution Functions
Fusion Growth of Gold Nanoparticles Induced by the Conformational Change of a Thermoresponsive Polymer Studied by Distance Distribution Functions
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DOI：
10.1021/jp310906b
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发表时间：
2013-06
影响因子：
3.7
通讯作者：
T. Morita;Kenta Kurihara;Osamu Yoshida;H. Imamura;Y. Hatakeyama;K. Nishikawa;N. Uehara
中科院分区：
文献类型：
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作者：
T. Morita;Kenta Kurihara;Osamu Yoshida;H. Imamura;Y. Hatakeyama;K. Nishikawa;N. Uehara
利用小角X射线散射（SAXS）方法研究了温敏聚合物线团-小球转变引起的构象崩塌诱导金纳米粒子的生长动力学。在反应过程中形成的聚集体和纳米颗粒的生长过程中确定的距离分布函数的基础上计算的SAXS配置文件，而不必近似或简化的实际结构。聚集体和纳米颗粒的尺寸不是在反应的最后阶段而是在反应的中间阶段达到最大值，表明颗粒在生长过程中发生收缩。表面粗糙度增加到反应的中间阶段，然后显着降低在最后阶段。此外，还研究了聚合物浓度的依赖性。结果表明，在主要产物形成之前，有小颗粒生成，小颗粒的尺寸估计约为100 μ m。直径为7 nm。那个...
The growth kinetics of gold nanoparticles induced by the conformational collapse resulting from the coil–globule transition of thermoresponsive polymer was studied using small-angle X-ray scattering (SAXS) method. The growth process of aggregates and nanoparticles formed during the reaction was determined on the basis of distance distribution functions calculated from the SAXS profiles without having to approximate or simplify the actual structures. The size of aggregates and nanoparticles reached a maximum not in the final stage of the reaction but in the middle stage, indicating that shrinkage of the particles occurred in the growth process. The surface roughness increased up to the middle stage of the reaction and then significantly decreased in the final stage. Furthermore, the dependence of polymer concentration was also investigated. It was found that small particles were generated prior to the formation of main products, and size of the small particles was estimated to be ca. 7 nm in diameter. The ...