Ling Shengjie, Liang Heyi, Li Zhao, Ma Li, Yao Jinrong, Shao Zhengzhong, Chen Xin
State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, People's Republic of China.
J Mater Chem B. 2016 Jun 7;4(21):3643-3650. doi: 10.1039/c6tb00616g. Epub 2016 Apr 25.
Gold nanomaterials (NMs), such as gold nanoparticles (NPs), gold nanoclusters (NCs), and gold nanosheets (NSs), attract great interest in many different fields of science and technology, due to their distinct optical, catalytic and conductive properties. Reports of the biogenic formation of gold colloids from gold complexes have also led to an increased level of attention in the biomineralization of gold. However, few methods can be applied in the integrated generation of the multiform and high purity gold NMs. Here, we report the synthesis of stable, water-soluble gold NPs, NCs, and NSs via a facile and green method, using soy protein isolate as reductant, template, and capping agent. The size and shape of the resulting gold NMs can be easily regulated by changing the pH and incubation time. Moreover, by combining the high aspect ratio of gold NSs and the unique properties of soy protein (such as good biocompatibility, easy film-forming features, and satisfactory mechanical properties), we developed a new type of robust, free-standing gold/protein nanocomposite hybrid film, which presents a sensitive response to humidity, showing promise in a vast range of applications, such as biosensors, e-skin and actuators.
金纳米材料（NMs），如金纳米颗粒（NPs）、金纳米簇（NCs）和金纳米片（NSs），由于其独特的光学、催化和导电性能，在许多不同的科学和技术领域引起了极大的关注。关于从金配合物生物合成金胶体的报道也导致了对金生物矿化的关注度增加。然而，很少有方法可用于多形态和高纯度金纳米材料的综合制备。在此，我们报道了一种简便、绿色的方法，以大豆分离蛋白作为还原剂、模板和封端剂，合成稳定的水溶性金纳米颗粒、纳米簇和纳米片。通过改变pH值和孵育时间，可以轻松调节所得金纳米材料的尺寸和形状。此外，通过结合金纳米片的高纵横比和大豆蛋白的独特性能（如良好的生物相容性、易于成膜的特性和令人满意的机械性能），我们开发了一种新型的坚固、自立的金/蛋白纳米复合杂化膜，该膜对湿度表现出敏感响应，在生物传感器、电子皮肤和致动器等广泛应用中显示出前景。
