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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 |
Issue Date: | 2016 | Source: | HKIE transactions, 2016, v. 23, no. 4, p. 174-178 | 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. | Keywords: | 3D-printed Copper sulfide Millifluidic Plasmonics Semiconductor nanocrystals |
Publisher: | Hong Kong Institution of Engineers | Journal: | HKIE transactions | ISSN: | 1023-697X | EISSN: | 2326-3733 | DOI: | 10.1080/1023697X.2016.1231020 | Rights: | © 2016 The Hong Kong Institution of Engineers Posted with permission of the Hong Kong Institution of Engineers The date of receipt of the paper to the HKIE Transactions: 16 March 2016 The date of acceptance of the paper to the HKIE Transactions: 14 July 2016 This is an Accepted Manuscript of an article published by The Hong Kong Institution of Engineers in HKIE Transactions in Volume 23 Issue 4 on 16 Dec 2016, available online: https://www.hkie.org.hk/hkietransactions/article_detail.php?id=91 |
| Appears in Collections: | Journal/Magazine Article |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| THIE-2016-0018.R1.pdf | Pre-Published version | 1.89 MB | Adobe PDF | View/Open |
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