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Purnima Ruberu T. Purnima A. Ruberu

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Post# of 22467
Posted On: 06/02/2015 8:13:22 PM
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Posted By: chessmite
Purnima Ruberu
T. Purnima A. Ruberu



Controlled Fabrication of Semiconductor-Metal Hybrid Nano-Heterostructures via Site-Selective Metal Photodeposition


Application number: 20130174778

Abstract: A method of synthesizing colloidal semiconductor-metal hybrid heterostructures is disclosed. The method includes dissolving semiconductor nanorods in a solvent to form a nanorod solution, and adding a precursor solution to the nanorod solution. The precursor solution contains a metal. The method further includes illuminating the combined precursor and nanorod solutions with light of a specific wavelength. The illumination causes the deposition of the metal in the precursor solution onto the surface of the semiconductor nanorods.

Type: Application

Filed: January 4, 2013

Issued: July 11, 2013

Assignee: Iowa State University Research Foundation, Inc.

Inventors: Javier Vela Becerra, T. Purnima A. Ruberu

http://patents.justia.com/inventor/t-purnima-a-ruberu

http://www.public.iastate.edu/~vela/Vela_rese.../home.html

PhD Graduates

Dr. Sam Alvarado, 2010-2015, BS from Augustana College, Rock Island, IL

Dr. Yijun Guo, 2009-2014, BS from Anhui Normal University, Hefei, China

Dr. Chia-Cheng (John) Lin, 2010-2015, MS from National Tsing Hua University, Taiwan

Dr. Malinda Reichert, 2010-2015, BS from University of Wisconsin, Oshkosh, WI

Dr. T. Purnima A. Ruberu, 2009-2013, BS from Univ. of Colombo, Sri Lanka

Dr. Elham Tavasoli, 2009-2014, MS from Sharif University of Technology, Iran

http://www.public.iastate.edu/~vela/Vela_rese...mbers.html
.......notice time to rec PhD vs others


RESEARCH

A few metal (Pt, Pd) islands on the semiconductor surface greatly enhance the activity and selectivity, and prevent etching and degradation of the photocatalyst. CdS-Pt favors dehydrogenation (to benzaldehyde/H2) over hydrogenolysis (to toluene) 8:1, whereas CdS0.4Se0.6-Pd favors hydrogenolysis over dehydrogenation

Multi-element solid-state compounds such as Cu2ZnSnS4, TaON, Yb14MnSb11, and PtxBiyPbz are at the forefront of emerging energy technologies for photovoltaic solar cells, photocatalytic devices, thermoelectric power generators, and fuel cells, respectively.

Having a working scale of chemical reactivities for cationic and pnictide precursors will obviate the need for time-consuming testing of several different reaction conditions or precursors at random, as is often still practiced in the field of solution-phase material synthesis. This work will thus lead to vertical (rather than incremental) improvements in the synthesis and characterization of CZTS and M-V-VI materials.
http://www.public.iastate.edu/~vela/Vela_rese...earch.html



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