通过表面引发原子转移自由基聚合制备的热敏纳米电缆

Thermosensitive Nanocables Prepared by Surface-Initiated Atom Transfer Radical Polymerization.

作者信息

Wei Qingshan, Zhou Wenbo, Ji Jian, Shen Jiacong

机构信息

Department of Polymer Science and Engineering, Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Zhejiang University, Hangzhou, 310027 People's Republic of China.

出版信息

Nanoscale Res Lett. 2009 Jan;4(1):84-89. doi: 10.1007/s11671-008-9206-5. Epub 2008 Nov 19.

DOI:10.1007/s11671-008-9206-5

PMID:20592960

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2893766/

Abstract

Thermosensitive nanocables consisting of Au nanowire cores and poly(N-isopropylacrylamide) sheaths (denoted as Au/PNIPAAm) were synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP). The formation of PNIPAAm sheath was verified by Fourier transform infrared (FTIR) and hydrogen nuclear magnetic resonance ((1)H NMR) spectroscopy. Transmission electron microscope (TEM) results confirmed the core/shell structure of nanohybrids. The thickness and density of PNIPAAm sheaths can be adjusted by controlling the amount of cross-linker during the polymerization. Signature temperature response was observed from Au/cross-linked-PNIPAAm nanocables. Such smart nanocables show immense potentials as building blocks for novel thermosensitive nanodevices in future.

摘要

通过表面引发原子转移自由基聚合（SI-ATRP）合成了由金纳米线芯和聚（N-异丙基丙烯酰胺）鞘层组成的热敏纳米电缆（表示为Au/PNIPAAm）。通过傅里叶变换红外光谱（FTIR）和氢核磁共振（¹H NMR）光谱验证了PNIPAAm鞘层的形成。透射电子显微镜（TEM）结果证实了纳米杂化物的核壳结构。在聚合过程中，通过控制交联剂的量可以调节PNIPAAm鞘层的厚度和密度。从Au/交联-PNIPAAm纳米电缆中观察到了特征温度响应。这种智能纳米电缆作为未来新型热敏纳米器件的构建模块具有巨大的潜力。