Wai Sze Cheung Presents Research at Symposium

Study looks at use of nanosized silicon powders in nanoelectronics and photovoltaics.  


Wai Sze Cheung ’09 presented a poster, “Synthesis of Nanosized Silicon Powders and Characterization of Their Electrical Properties” at Randolph College’s Symposium for Artists & Scholars on April 17, 2009.

Cheung conducted the research project with her faculty mentor, Peter Sheldon, associate professor of physics, while an undergraduate student at Randolph College.

An abstract of project follows...

The application of nanosized silicon powders in nanoelectronics and photovoltaics opens paths for new technologies. One of the examples is the use of nanosized silicon powders in solar cells, which can reduce production costs of existing devices. However, the properties of the powder are not yet fully understood. In this research, the electrical property of nanosized silicon powders was investigated. The powders were synthesized in a low pressure reactor, and powders with different particle size and varying dopant concentration were prepared. Cyclic voltammetry was used as a mean to characterize the current-voltage relationship of the powders. A force ranging from 10kN to 80kN was applied to the powder during the measurement. A non-linear change in resistance was observed during the compression.

The Student Symposium of Artists and Scholars provides Randolph College students from all classes and disciplines the opportunity to present the results of their research, scholarship, and creative work to the entire College community and beyond.

The two-day symposium, modeled after a typical academic conference, features oral presentations of student research, readings of creative work, musical performances, and exhibitions of student artwork. The symposium also includes a poster session, reception and a keynote address from a noteworthy academic speaker.

Learn more at www.randolphcollege.edu/sas