Current-less photoreactivity catalyzed by functionalized AFM tips

ANYL 398

Mandakini Kanungo, mkanungo@bnl.gov1, Vasiliki Zorbas2, Sukhmine A. Bains3, and Stanislaus S. Wong1. (1) Materials Science, Brookhaven National Laboratory, Blg. no. 480, Brookhaven National Laboratory, Upton, NY 11973-5000, (2) Department of Chemistry, University of Texas at Dallas, Dallas, TX 75080, (3) Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
The ability to conduct controlled photochemical reactions in a highly localized region is critical in the field of semiconductor technology. Scanning probe microscopy (SPM) techniques especially atomic force microscopy (AFM) offers a good perspective towards the fulfillment of this goal. In the present work, spatially confined photocatalytic oxidation of a thin film of synthetic textile azo dye (Procion Red MX-5B) was carried out using TiO2 functionalized AFM probes. The reaction process was confirmed through acquisition of optical microscopy and AFM imaging and roughness analysis as well as through surface FT- mid IR spectroscopy studies. This procedure transforms an important, generalizable and bulk photocatalytic reaction in a solution into highly localized site selective surface photochemical modifications.

 

Analytical Approaches
1:30 PM-4:40 PM, Thursday, 30 March 2006 Georgia World Congress Center -- B213, Oral

Sci-Mix
8:00 PM-10:00 PM, Monday, 27 March 2006 Georgia World Congress Center -- Ex. Hall B4, Sci-Mix

Division of Analytical Chemistry

The 231st ACS National Meeting, Atlanta, GA, March 26-30, 2006