In situ small-angle X-ray scattering investigation of X-ray-induced gold nanoparticle synthesis without stabilizer
In situ small-angle X-ray scattering investigation of X-ray-induced gold nanoparticle synthesis without stabilizer
复制标题
无稳定剂 X 射线诱导金纳米颗粒合成的原位小角 X 射线散射研究
DOI：
10.1107/s1600576721010207
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发表时间：
2021-11
影响因子：
6.1
通讯作者：
Tianxi Sun
中科院分区：
文献类型：
--
作者：
Fangzuo Li;Qianqian Xu;Wenjing Xia;Xiang Zhang;Weidong Zhao;Lili Zhou;Haijian Zhong;Weijie Peng;Zhiguo Liu;Tianxi Sun
研究了在不添加还原剂和稳定剂的情况下，x射线辐照金盐水溶液合成金纳米粒子的过程。利用原位小角x射线散射技术，对AuNPs在辐射分解过程中的粒径、分散度、颗粒数、产率和形态演变进行了跟踪研究。本研究揭示了在没有还原剂和稳定剂的情况下，AuNP合成初始阶段的整体动力学和形成机制。观察了水中HAuCl4的ph依赖形态及其对AuNPs合成、结构和性质的影响。该结果揭示了获得稳定的单峰粒子所需的关键参数，以及化学溶液的表面电荷和反应性对最终粒子尺寸和形状的影响。
The X-ray irradiation of gold salt aqueous solutions in the synthesis of gold nanoparticles (AuNPs) in the absence of any reducing agent or stabilizer is presented. The size, dispersion, number of particles, yield and morphology evolution during the radiolytic formation of AuNPs were followed simultaneously using in situ small-angle X-ray scattering. This study provides an insight into the overall kinetics and formation mechanisms at the initial stage of AuNP synthesis without reductants and stabilizers. The pH-dependent speciation of aqueous HAuCl4 and its influence on the synthesis, structure and properties of AuNPs were observed. The result sheds light on the key parameters required to obtain stable monomodal particles and the influence of the surface charge and reactivity of the chemical solution on the final particle size and shape.