刺激响应性高分子智能调控的贵金属纳米粒子的合成与自组装

Due to their unique optical, electronic and catalytic properties, noble metal nanoparticles (NPs) including gold (Au), silver (Ag), palladium (Pd) and platinum (Pt) have been widely used in the numerous applications such as biosensor, selective catalysis, energy storage and nanomedicine. Precisely controlling the synthesis and self-assembly of noble metal NPs is the recent trends and challenge. In this project, unlike traditional synthetic method, a series of smart-controlled synthetic approaches will be designed by using stimuli-responsive polymers. Research contents are as below: (1) The stimuli-responsive polymers are absorbed on the surfaces of ‘seed’. This would change the surface energy of ‘seed’ by controlling the external fields, which leads to the distinctive secondary growth of special crystal facets of ‘seed’. This smart approach allows us to obtian different noble NPs by using the same recipe; (2) The polymer chains can be selectively collapsed or stretched onto the surfaces of ‘seed’ by tuning the external fields, when the stimuli-responsive polymers were modified onto the surfaces of ‘seed’ by chemical bonds. This would lead to discontinuous secondary growth of ‘seed’, differencing from the continuous secondary growth model of ionic surfactants absolved ‘seed’. Additionally, this project would further explore the reversible self-assembly and dis-assembly of gold NPs by using stimuli-responsive polymers, and also design a series of mutil-functional and samrt switchable nanodevices.

贵金属纳米粒子，包括金、银、钯、铂等，由于其独特的光、电及催化性能，已经被应用到传感器、催化、能源以及纳米医药等众多领域。如何精确调控纳米粒子的合成与自组装是目前贵金属纳米材料的研究热点与难点。本项目拟利用刺激响应性高分子对外界环境的响应性，突破传统的化学合成概念，实现外界环境对纳米材料的智能可控合成。主要包括：（1）刺激响应性高分子吸附纳米晶核表面，利用外界环境对高分子的响应调控晶核的表面自由能，达到调节晶核的特定晶面生长，进而实现同一种配方，不同纳米粒子产出的智能化手段。（2）刺激响应性高分子通过化学键绑定到晶核表面，调控外界条件使高分子链在晶核表面选择性伸展和塌缩，形成与传统的离子表面活性剂通过物理吸附晶核不同的非连续性生长模式。在此基础上，本项目还将研究刺激响应性高分子调控纳米金的可逆自组装与解组装，开发一系列功能化智能型开关纳米器件。

贵金属纳米粒子，包括金、银、钯、铂等，由于其独特的光、电及催化性能，已经被应用到传感器、催化、能源以及纳米医药等众多领域。如何精确调控纳米粒子的合成与自组装是目前贵金属纳米材料的研究热点与难点。本项目利用了刺激响应性高分子对外界环境的响应性，突破传统的化学合成概念，实现外界环境对纳米材料的智能可控合成。主要包括：（1）刺激响应性高分子吸附纳米晶核表面，利用外界环境对高分子的响应调控晶核的表面自由能，达到调节晶核的特定晶面生长，进而实现同一种配方，不同纳米粒子产出的智能化手段。（2）刺激响应性高分子通过化学键绑定到晶核表面，调控外界条件使高分子链在晶核表面选择性伸展和塌缩，形成与传统的离子表面活性剂通过物理吸附晶核不同的非连续性生长模式。在此基础上，本项目还研究了刺激响应性高分子调控纳米金的可逆自组装与解组装，开发一系列功能化智能型开关纳米器件。基于上述工作，以第一作者/通讯作者发表SCI文章25篇。