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Title: Electronic structure of cyclodextrin–carbon nanotube composite films

Abstract

The electronic structures of two kinds of cyclodextrin–carbon nanotube (αCD–CNT and γCD–CNT) composite films are investigated by using (angular dependent) photoelectron spectroscopy to gain insight as to why the αCD–CNT and γCD–CNT composite films show different performances in biosensor applications. The γCD–CNT composite film is likely to have the CD localized on the surface rather than in the bulk of the film, while αCD–CNT has CD relatively more concentrated within the bulk of selvedge region of the film, rather than the surface. The results indicate that the CD, of the γCD–CNT composite, may be more bioactive, and possibly a better sensor of biomolecules due to the favorable surface position compared with that of αCD–CNT. The valence band of αCD–CNT and γCD–CNT show little difference from the CNT film except for a density of states, originating from CD, evident at a binding energy near 27 eV below Fermi level, meaning that there are few or no redox interactions between the CD and the CNT. The absence of a redox interaction between the CD and the CNT permits a clear electrochemical response to occur when guest biomolecules are captured on the composites, providing a route to biosensor applications.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [1]; ORCiD logo [2]
  1. Daegu Univ., Gyeongsan (Korea). Dept. of Physics, Inst. of Basic Science
  2. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Org.:
USDOE; National Research Foundation of Korea (NRF)
OSTI Identifier:
1423560
Grant/Contract Number:  
FG02-07ER15842
Resource Type:
Accepted Manuscript
Journal Name:
RSC Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 18; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Jeong, Hae Kyung, Echeverria, Elena, Chakraborti, Priyanka, Le, Hien Thi, and Dowben, P. A. Electronic structure of cyclodextrin–carbon nanotube composite films. United States: N. p., 2017. Web. doi:10.1039/c6ra26900a.
Jeong, Hae Kyung, Echeverria, Elena, Chakraborti, Priyanka, Le, Hien Thi, & Dowben, P. A. Electronic structure of cyclodextrin–carbon nanotube composite films. United States. doi:10.1039/c6ra26900a.
Jeong, Hae Kyung, Echeverria, Elena, Chakraborti, Priyanka, Le, Hien Thi, and Dowben, P. A. Fri . "Electronic structure of cyclodextrin–carbon nanotube composite films". United States. doi:10.1039/c6ra26900a. https://www.osti.gov/servlets/purl/1423560.
@article{osti_1423560,
title = {Electronic structure of cyclodextrin–carbon nanotube composite films},
author = {Jeong, Hae Kyung and Echeverria, Elena and Chakraborti, Priyanka and Le, Hien Thi and Dowben, P. A.},
abstractNote = {The electronic structures of two kinds of cyclodextrin–carbon nanotube (αCD–CNT and γCD–CNT) composite films are investigated by using (angular dependent) photoelectron spectroscopy to gain insight as to why the αCD–CNT and γCD–CNT composite films show different performances in biosensor applications. The γCD–CNT composite film is likely to have the CD localized on the surface rather than in the bulk of the film, while αCD–CNT has CD relatively more concentrated within the bulk of selvedge region of the film, rather than the surface. The results indicate that the CD, of the γCD–CNT composite, may be more bioactive, and possibly a better sensor of biomolecules due to the favorable surface position compared with that of αCD–CNT. The valence band of αCD–CNT and γCD–CNT show little difference from the CNT film except for a density of states, originating from CD, evident at a binding energy near 27 eV below Fermi level, meaning that there are few or no redox interactions between the CD and the CNT. The absence of a redox interaction between the CD and the CNT permits a clear electrochemical response to occur when guest biomolecules are captured on the composites, providing a route to biosensor applications.},
doi = {10.1039/c6ra26900a},
journal = {RSC Advances},
number = 18,
volume = 7,
place = {United States},
year = {2017},
month = {2}
}

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