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嵌段无规共聚物胶束化介导的金纳米粒子上聚合物片的形成
作者:小柯机器人 发布时间:2021/3/30 16:58:07

复旦大学聂志鸿团队开发了一种嵌段无规共聚物胶束化介导的金纳米粒子上聚合物片的形成策略。 相关研究成果于2021年3月26日发表于国际一流学术期刊《美国化学会杂志》。

片状胶体纳米颗粒具有广泛的应用前景,特别是作为复杂功能结构材料的构建单元,但是在合成的纳米颗粒上可控生成化学片仍然是一个挑战。

该文描述了一种在高收率和高固体含量下可伸缩合成高质量片状纳米颗粒的稳健策略。在选定的溶剂中对金纳米颗粒和巯基封端的嵌段无规共聚物的混合物进行简单的热处理,产生具有受控形态和聚合物片数量的各种片块状纳米颗粒(例如,豆状片、一个片、两个片、三个片、多个片和开放配置片)。

在实验和模拟中研究表明,共聚物的动态分离/附着以及溶液中纳米粒子表面和自由胶束之间的共聚物交换(由共聚物的结构决定)控制着聚合物片的形成。

该工作不仅为研究片状纳米颗粒提供了一种有效的方法,而且为研究共聚物在纳米尺度表面的相行为提供了新的视角。

附:英文原文

Title: Block-Random Copolymer-Micellization-Mediated Formation of Polymeric Patches on Gold Nanoparticles

Author: Yiqun Yang, Chenglin Yi, Xiaozheng Duan, Qi Wu, Yan Zhang, Jing Tao, Wenhao Dong, Zhihong Nie

Issue&Volume: March 26, 2021

Abstract: Patchy colloidal nanoparticles are important for a broad range of applications, especially as building blocks for complex and functional structural materials, but the controllable generation of chemical patches on as-synthesized nanoparticles remains a challenge. This article describes a robust strategy for the scalable synthesis of high-quality patchy nanoparticles in high yield and solid content. A simple thermal treatment of a mixture of gold nanoparticles and thiol-terminated block-random copolymers in selected solvents produced a variety of patchy nanoparticles with a controlled morphology and number of polymeric patches (e.g., beanlike patch, one patch, two patches, three patches, multiple patches, and open-configuration patch). We show in experiments and simulations that the dynamic detachment/attachment of copolymers and the exchange of copolymers between the nanoparticle surface and free micelles in the solution—which are dictated by the architecture of copolymers—govern the formation of polymeric patches. This work not only offers an effective approach to patchy nanoparticles but also provides new insights into the phase behaviors of copolymers on nanoscale surfaces.

DOI: 10.1021/jacs.1c00310

Source: https://pubs.acs.org/doi/10.1021/jacs.1c00310

 

期刊信息

JACS:《美国化学会志》,创刊于1879年。隶属于美国化学会,最新IF:14.612
官方网址:https://pubs.acs.org/journal/jacsat
投稿链接:https://acsparagonplus.acs.org/psweb/loginForm?code=1000