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Shin, Hyeon Suk
Lab for Carbon and 2D Materials
Research Interests
  • Two-dimensional materials: graphene, transition metal dichalcogenides, h-BN, and their heterostructures

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"Fingertip"-Guided noncovalent functionalization of carbon nanotubes by dendrons

Cited 10 times inthomson ciCited 11 times inthomson ci
Title
"Fingertip"-Guided noncovalent functionalization of carbon nanotubes by dendrons
Author
Woo, SungwookLee, YoonmiSunkara, VijayaCheedarala, Ravi KumarShin, Hyeon SukChoi, Hee CheulPark, Joon Won
Issue Date
2007-11
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.23, no.23, pp.11373 - 11376
Abstract
Noncovalent functionalization of carbon nanotubes (CNTs) by dendrons was demonstrated. Certain types of dendrons successfully functionalized CNT surfaces through the noncovalent interactions between the peripheries of the dendrons and the sidewalls of CNTs. Dendrons have a unique anisotropic shape and an orthogonal functional group at their apex, and thus can generate a certain spacing between the functional groups upon immobilization on surfaces. Atomic force microscope (AFM) imaging, dispersion experiments, and MicroRaman spectroscopy were employed for the characterization of the functionalization. The binding was found to be governed by the chemical nature of the terminal groups, namely, the "fingertips", through a comparison study on the adsorption efficiency of the dendron analogs. Functional groups such as the carboxylic acid group and the benzyl amide group were effective for the cooperative binding. AFM analysis showed that the average spacing generated by the dendrons was 14-15 nm at a particular adsorption condition. Assembling streptavidin on the tubes through the dendrons and biotin confirmed the realization of the regulated spacing as well as the elimination of unwanted aggregation. The noncovalent functionalization of CNTs by a dendron can be a new approach toward sensible nanobiodevices, not only by introducing biomolecular probes on CNTs without disruption of the electronic network of the tubes, but also by providing the immobilized probe molecules with a space ample enough to minimize steric hindrance for the unhindered interaction with their target species.
URI
https://scholarworks.unist.ac.kr/handle/201301/5869
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=36248946262
DOI
10.1021/la701968y
ISSN
0743-7463
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CHM_Journal Papers
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