Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8742
Title: Organic liquids-responsive β-cyclodextrin-functionalized graphene-based fluorescence probe : label-free selective detection of tetrahydrofuran
Authors: Hu, H
Xin, JH 
Hu, H 
Wang, X
Lu, X
Keywords: Chemical reduction and functionalization
Fluorescence probe
Fluorescence quenching
Fluorescence switch-on
Functionalized graphene
Graphene oxide
Rhodamine B
Sensing platform
Sensor
β-cyclodextrin
Issue Date: 2014
Publisher: MDPI AG
Source: Molecules, 2014, v. 19, no. 6, p. 7459-7479 How to cite?
Journal: Molecules 
Abstract: In this study, a label-free graphene-based fluorescence probe used for detection of volatile organic liquids was fabricated by a simple, efficient and low-cost method. To fabricate the probe, a bio-based β-cyclodextrin (β-CD) was firstly grafted on reduced graphene surfaces effectively and uniformly, as evidenced by various characterization techniques such as Ultraviolet/Visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy and transmission electron microscopy. The subsequent inclusion of Rhodamine B (RhB) into the inner cavities of the β-CD grafted on the graphene surfaces was achieved easily by a solution mixing method, which yielded the graphene-based fluorescent switch-on probe. In addition, the gradual and controllable quenching of RhB by Fluorescence Resonance Energy Transfer from RhB to graphene during the process of stepwise accommodation of the RhB molecules into the β-CD-functionalized graphene was investigated in depth. A wide range of organic solvents was examined using the as-fabricated fluorescence probe, which revealed the highest sensitivity to tetrahydrofuran with the detection limit of about 1.7 μg/mL. Some insight into the mechanism of the different responsive behaviors of the fluorescence sensor to the examined targets was also described.
URI: http://hdl.handle.net/10397/8742
ISSN: 1420-3049
DOI: 10.3390/molecules19067459
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