Electrochemical Redox Switchable Dispersion of Single-Walled Carbon Nanotubes in Water

被引：14

作者：

Feng, Anchao ^{[1
]}

Peng, Liao ^{[1
]}

Liu, Bowen ^{[1
]}

Liu, Senyang ^{[1
]}

Wang, Shanfeng ^{[2
]}

Yuan, Jinying ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 17期

基金：

中国国家自然科学基金;

关键词：

single-walled carbon nanotubes (SWNTs); stimuli-responsive polymer; electrochemical redox switch; dispersion of SWNTs; host-guest interaction; REVERSIBLE DISPERSION; DRUG-DELIVERY; COPOLYMER; MICELLES; STIMULI; PH; HOMOPOLYMERS; AGGREGATION; TEMPERATURE; NANOFIBERS;

D O I：

10.1021/acsami.5b12864

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present a new, efficient approach to achieve superior dispersibility of single-walled carbon nanotubes (SWNTs) in water by integrating reversible host-guest interaction and pi-pi stacking. In this approach, beta-cyclodextrin (beta-CD) was first modified with a pyrene group to be adsorbed onto the wall of pristine SWNTs via pi-pi stacking, followed by further functionalization with ferrocene (Fc)-terminated water-soluble poly (ethylene glycol) (PEG) through supramolecular host-guest interaction between beta-CD and Fc. Upon alternate electrochemical oxidative/reductive stimuli, the reversible host-guest pair enabled the PEG-Fc@Py-CD@SWNTs to exhibit switchable conversion between dispersion and aggregation states. Electric field controllable PEG-Fc@Py-CD@SWNTs with good reversibility and intact nanotube structure may find potential applications in selective screening of SWNTs, biosensors, and targeted drug delivery.

引用

页码：11024 / 11030

页数：7

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