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Proceedings Paper

Thiol adsorption on metal oxides: an approach for selective deposition on zinc oxide nanoparticles
Author(s): Jason W. Soares; Diane M. Steeves; Jagdeep Singh; Jisun Im; James E. Whitten
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Paper Abstract

We have previously discovered a novel, facile approach to encapsulate ZnO nanorods within thiol complexes. This approach results in a thiol uptake of 30-40% and a 400-500 nm thick thiol-Zn-thiol complex encapsulation layer surrounding ZnO nanorods. By controlling experimental parameters, it is possible to control the thiol deposition, enabling less uptake, which results in a surface monolayer instead of encapsulation. Through this approach, thiol modification of other metal oxide materials, namely TiO2, Al2O3, and MgO, has been attempted. FTIR analysis indicates that thiol adsorption occurs only on ZnO; chemisorption of thiols on other nanoparticles is not evident. Ultrahigh vacuum single crystal adsorption studies demonstrate that ZnO(0001) is also more susceptible to thiol monolayer formation, as evidenced by lack of methanethiol adsorption on TiO2(110) and MgO(0001). These results indicate that the facile thiol modification approach opens a new avenue for surface modification of multi-component metal oxide materials by enabling selective thiol modification of ZnO. This work has potential applicability for creating multiple ligand-functionalized materials, which could be useful for the design of novel multiplexing sensors and photovoltaics.

Paper Details

Date Published: 14 March 2011
PDF: 7 pages
Proc. SPIE 7940, Oxide-based Materials and Devices II, 79400K (14 March 2011); doi: 10.1117/12.875393
Show Author Affiliations
Jason W. Soares, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Diane M. Steeves, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Jagdeep Singh, Univ. of Massachusetts Lowell (United States)
Jisun Im, Univ. of Massachusetts Lowell (United States)
James E. Whitten, Univ. of Massachusetts Lowell (United States)

Published in SPIE Proceedings Vol. 7940:
Oxide-based Materials and Devices II
Ferechteh Hosseini Teherani; David C. Look; David J. Rogers, Editor(s)

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