Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds
Author: Kumeria, T.
Parkinson, L.
Losic, D.
Citation: Nanoscale Research Letters, 2011; 6(1):634-1-634-7
Publisher: SpringerOpen
Issue Date: 2011
ISSN: 1931-7573
Statement of
Tushar Kumeria, Luke Parkinson and Dusan Losic
Abstract: This work presents the use of nanoporous anodic aluminium oxide [AAO] for reflective interferometric sensing of volatile sulphur compounds and hydrogen sulphide [H2S] gas. Detection is based on changes of the interference signal from AAO porous layer as a result of specific adsorption of gas molecules with sulphur functional groups on a gold-coated surface. A nanoporous AAO sensing platform with optimised pore diameters (30 nm) and length (4 µm) was fabricated using a two-step anodization process in 0.3 M oxalic, followed by coating with a thin gold film (8 nm). The AAO is assembled in a specially designed microfluidic chip supported with a miniature fibre optic system that is able to measure changes of reflective interference signal (Fabry-Perrot fringes). When the sensor is exposed to a small concentration of H2S gas, the interference signal showed a concentration-dependent wavelength shifting of the Fabry-Perot interference fringe spectrum, as a result of the adsorption of H2S molecules on the Au surface and changes in the refractive index of the AAO. A practical biomedical application of reflectometric interference spectroscopy [RIfS] Au-AAO sensor for malodour measurement was successfully shown. The RIfS method based on a nanoporous AAO platform is simple, easy to miniaturise, inexpensive and has great potential for development of gas sensing devices for a range of medical and environmental applications.
Keywords: nanoporous alumina; reflectometric interference spectroscopy; volatile sulphur compounds; hydrogen sulphide sensor; oral malodour
Rights: © 2011 Kumeria et al; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
RMID: 0020116504
DOI: 10.1186/1556-276X-6-634
Grant ID:
Appears in Collections:Chemical Engineering publications

Files in This Item:
File Description SizeFormat 
hdl_86969.pdfPublished version5.41 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.