Vaidya, Sonalika ; Patra, Amitava ; Ganguli, Ashok K. (2012) Optical properties of Ag@TiO2 and CdS@TiO2 core–shell nanostructures Science of Advanced Materials, 4 (5). pp. 631-636. ISSN 1947-2935
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Official URL: http://www.ingentaconnect.com/contentone/asp/sam/2...
Related URL: http://dx.doi.org/10.1166/sam.2012.1330
Abstract
Titanium hydroxyacylate has been used as a shell forming agent to form core–shell nanostructures of Ag@TiO2 (10–40 nm core; 15 nm shell) and CdS@TiO2 (3 nm core; 1 nm shell) using the reverse micellar route. The low rate of hydrolysis of titanium hydroxyacylate appears to be responsible for the formation of TiO2 shell. A red shift of 25 nm was observed in the surface plasmon band of silver for Ag@TiO2 core–shell structures (compared with that of silver nanoparticles) while blue shift of the absorption band CdS@TiO2 core–shell nanostructures (compared to bare CdS nanoparticles) was observed. CdS@TiO2 shows a strong quantum confinement effect. Our studies clearly show an increase in the PL intensity of Ag@TiO2 which we rationalize based on the SERS effect of the Ag nanoparticle. No quenching was observed of the emission band of CdS for the CdS@TiO2 core–shell nanostructures.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Scientific Publishers. |
Keywords: | Core–Shell Nanostructures; Optical Properties |
ID Code: | 104740 |
Deposited On: | 01 Dec 2017 11:16 |
Last Modified: | 01 Dec 2017 11:16 |
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