Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/65789
Title: 3D-printed millifluidic chip for synthesising plasmonic semiconductor nanocrystals as sensors substrate
Authors: Law, WC 
Cheung, TL
Rao, N
Keywords: 3D-printed
Copper sulfide
Millifluidic
Plasmonics
Semiconductor nanocrystals
Issue Date: 2016
Publisher: Hong Kong Institution of Engineers
Source: HKIE transactions, 2016, v. 23, no. 4, p. 174-178 How to cite?
Journal: HKIE transactions 
Abstract: In the past, plasmonics were always referred to as the collective oscillation of free electrons on metal surfaces such as gold (Au) and silver (Ag). This changed when plasmonic behaviour was experimentally demonstrated in semiconductors, i.e. self-doped copper sulfur, nanocrystals (Cu2−xS NCs) in 2009. In fact, Cu2−xS NC possesses different plasmonic behaviour than Au and Ag, in which the resonant condition is governed by another regime (free holes as the carriers) and its sensing capability has not yet been fully explored. In this contribution, the as-prepared (organic phase) Cu2−xS NCs were transferred in water and were tested with glycerin-water mixtures and anions. The results showed that Cu2−xS NC is very sensitive to the variation of refractive index in the surrounding environment. Furthermore, it was found that the plasmonic properties of these NCs are also very sensitive to the presence of anions. By taking the advantages of this “additional” effect, Cu2−xS NC can be used as a potential substrate for the fabrication of sensor devices with enhanced sensitivity.
URI: http://hdl.handle.net/10397/65789
ISSN: 1023-697X
EISSN: 2326-3733
DOI: 10.1080/1023697X.2016.1231020
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page view(s)

15
Last Week
0
Last month
Checked on Aug 20, 2017

Google ScholarTM

Check

Altmetric



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