ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Resonance raman detection and estimation in the aqueous phase using water dispersible cyclodextrin: reduced-graphene oxide sheets

Konkena, Bharathi and Vasudevan, Sukumaran (2013) Resonance raman detection and estimation in the aqueous phase using water dispersible cyclodextrin: reduced-graphene oxide sheets. In: Analytical Chemistry, 85 (10). pp. 5114-5119.

[img] PDF
Anal_Chem_85-10_5114_2013.pdf - Published Version
Restricted to Registered users only

Download (524kB) | Request a copy
[img] PDF
Anal_Chem_85-10_1_2013.pdf - Published Supplemental Material
Restricted to Registered users only

Download (1MB) | Request a copy
Official URL: http://dx.doi.org/10.1021/ac400457h

Abstract

Resonance Raman spectroscopy is a powerful analytical tool for detecting and identifying analytes, but the associated strong fluorescence background severely limits the use of the technique. Here, we show that by attaching beta-cyclodextrin (beta-CD) cavities to reduced graphene-oxide (rGO) sheets we obtain a water dispersible material (beta-CD: rGO) that combines the hydrophobicity associated with rGO with that of the cyclodextrin cavities and provides a versatile platform for resonance Raman detection. Planar aromatic and dye molecules that adsorb on the rGO domains and nonplanar molecules included within the tethered beta-CD cavities have their fluorescence effectively quenched. We show that it is possible using the water dispersible beta-CD: rGO sheets to record the resonance Raman spectra of adsorbed and included organic chromophores directly in aqueous media without having to extract or deposit on a substrate. This is significant, as it allows us to identify and estimate organic analytes present in water by resonance Raman spectroscopy.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Francis Jayakanth
Date Deposited: 21 Aug 2013 06:21
Last Modified: 21 Aug 2013 06:21
URI: http://eprints.iisc.ac.in/id/eprint/46990

Actions (login required)

View Item View Item