Non-covalent Methods of Engineering Optical Sensors Based on Single-Walled Carbon Nanotubes

被引:42
作者
Gillen, Alice J. [1 ]
Boghossian, Ardemis A. [1 ]
机构
[1] Ecole Polytech Fed Lausanne, Lausanne, Switzerland
来源
FRONTIERS IN CHEMISTRY | 2019年 / 7卷
关键词
optical biosensing; near-infrared sensors; single-walled carbon nanotubes (SWCNTs or SWNTs); molecular recognition; selectivity; fluorescence brightness; non-covalent solubilization; PHASE MOLECULAR RECOGNITION; SYNTHETIC GENETIC POLYMERS; BAND-GAP FLUORESCENCE; ELECTRONIC-STRUCTURE; AQUEOUS DISPERSIONS; SDS SURFACTANTS; DNA; SEPARATION; PROTEIN; FUNCTIONALIZATION;
D O I
10.3389/fchem.2019.00612
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Optical sensors based on single-walled carbon nanotubes (SWCNTs) demonstrate tradeoffs that limit their use in in vivo and in vitro environments. Sensor characteristics are primarily governed by the non-covalent wrapping used to suspend the hydrophobic SWCNTs in aqueous solutions, and we herein review the advantages and disadvantages of several of these different wrappings. Sensors based on surfactant wrappings can show enhanced quantum efficiency, high stability, scalability, and diminished selectivity. Conversely, sensors based on synthetic and bio-polymer wrappings tend to show lower quantum efficiency, stability, and scalability, while demonstrating improved selectivity. Major efforts have focused on optimizing sensors based on DNA wrappings, which have intermediate properties that can be improved through synthetic modifications. Although SWCNT sensors have, to date, been mainly engineered using empirical approaches, herein we highlight alternative techniques based on iterative screening that offer a more guided approach to tuning sensor properties. These more rational techniques can yield new combinations that incorporate the advantages of the diverse nanotube wrappings available to create high performance optical sensors.
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页数:13
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