Purnima Ruberu T. Purnima A. Ruberu
Post# of 22454
Posted On: 06/02/2015 8:13:22 PM
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
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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