Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/5989
Title: | Role of surface states and defects in the ultrafast nonlinear optical properties of CuS quantum dots |
Authors: | Ann Mary, K.A. Unnikrishnan, N.V. Philip, Reji |
Issue Date: | Jul-2014 |
Publisher: | American Institute of Physics |
Citation: | APL Materials, 2014, Vol 2, 076104 |
Abstract: | We report facile preparation of water dispersible CuS quantum dots (2–4 nm) and nanoparticles (5–11 nm) through a nontoxic, green, one-pot synthesis method. Optical and microstructural studies indicate the presence of surface states and defects (dislocations, stacking faults, and twins) in the quantum dots. The smaller crystallite size and quantum dot formation have significant effects on the high energy excitonic and low energy plasmonic absorption bands. Effective two-photon absorption coefficients measured using 100 fs laser pulses employing open-aperture Z-scan in the plasmonic region of 800 nm reveal that CuS quantum dots are better ultrafast optical limiters compared to CuS nanoparticles. |
Description: | Open Access |
URI: | http://hdl.handle.net/2289/5989 |
ISSN: | 2166-532X |
Alternative Location: | http://dx.doi.org/10.1063/1.4886276 |
Copyright: | 2014 Authors licensed under Creative Commons Attribution 3.0 |
Appears in Collections: | Research Papers (LAMP) |
Files in This Item:
File | Description | Size | Format | |
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2014_ApplM_2_076104.pdf | Open Access | 530.46 kB | Adobe PDF | View/Open |
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