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Title: Aqueous phase synthesis of Cu2-xS nanostructures and their photothermal generation study
Authors: Xu, Z 
Rao, N 
Tang, CY 
Cheng, CH 
Law, WC 
Issue Date: 10-Sep-2019
Source: ACS omega, 10 Sept. 2019, v. 4, no. 11, p. 14655-14662
Abstract: Size- and shape-dependent features of plasmonic nanocrystals govern the development of their applications. In the past decades, gold nanostructures, such as gold nanorods and nanoshells, have been well studied and applied for sensing, bioimaging, and photothermal generation. However, knowledge of copper chalcogenide, a new generation of plasmonic nanomaterials, is limited, especially about their preparation and size- and shape-dependent photothermal properties. In this work, controllable size and shape Cu2-xS nanocrystals (NCs) are synthesized by a facile aqueous route. Using low-molecularweight polyethylenimine (PEI) as the reducing and capping agents, the size and shape of Cu2-xS NCs can be controlled with lengths from 6.5 to 46.5 nm and the aspect ratio from 2.2 to 7.5 by adjusting the concentration of PEI. The plasmonic peak of Cu2-xS experiences a redshift (from 1145 to 1369 nm) when the length increases from 6.5 to 44.5 nm. Under the irradiation of 1064 nm laser with 1.33 W/cm(2), an excellent photothermal conversion rate (from 34.9 to 49.0% is obtained. The characterization of Cu2-xS NCs is conducted with a UV-vis spectrometer, transmission electron microscopy, powder X-ray diffraction measurements, and 1064 nm laser.
Publisher: American Chemical Society
Journal: ACS omega 
ISSN: 2470-1343
DOI: 10.1021/acsomega.9b02204
Rights: Copyright © 2019 American Chemical Society
This is an open access article published under an ACS AuthorChoice License (https://pubs.acs.org/page/policy/authorchoice_termsofuse.html), which permits copying and redistribution of the article or any adaptations for non-commercial purpose.
The following publication Xu, Z. R., Rao, N. X., Tang, C. Y., Cheng, C. H., & Law, W. C. (2019). Aqueous phase synthesis of Cu2-xS nanostructures and their photothermal generation study. ACS Omega, 4(11), 14655-14662 is available at https://dx.doi.org/10.1021/acsomega.9b02204
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