Shape Memory Actuation of Janus Nanoparticles with Amphipathic Cross-Linked Network

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• 作者：Jinlong Zhang ; Xiaotong Zheng ; Fengluan Wu ; Bingyun Yan ; Shaobing Zhou ; Shuxin Qu ; Jie Weng
• 刊名：ACS Macro Letters
• 出版年：2016
• 出版时间：December 20, 2016
• 年：2016
• 卷：5
• 期：12
• 页码：1317-1321
• 全文大小：378K
• ISSN：2161-1653

文摘

Preparation of nanoscale Janus particles that can respond to external stimulation and, at the same time, be prepared using an easily achievable method presents a significant challenge. Here, we have demonstrated the shape memory of Janus nanoparticles (SMJNPs) with a multifunctional combination of Janus nanostructure and a shape memory effect, composed of a well-defined amphipathic sucrose-poly(ε-caprolactone) cross-linked network. A sudden negative pressure method was first used to prepare the Janus-shaped nanoparticles (temporary shape), which can switch their shape and wettability. The Janus-shaped nanoparticle is an amphipathic structure composed of hydrophilic and hydrophobic parts. Moreover, in response to temperature, the nanoparticle can recover their nanosphere state via a shape memory process. The novel Janus nanoparticles with the shape memory property also show a great potential for application such as drug delivery.