--------------------------------------------------------------------
           COLLOQUIUM OF THE COMPUTATIONAL MATERIALS SCIENCE CENTER
                              College of Science
                       (CDS Department CSI 898-Sec 001)
--------------------------------------------------------------------
Novel Fabrication Methods for Nanowire Logic, Memory and Sensing Devices

                        Qiliang Li
     Department of Electrical and Computer Engineering, 
            George Mason University, Fairfax, VA

We have developed two novel methods to align and integrate semiconductor 
nanowires for electronic device application.  Method 1: we developed a 
single nanowire manipulation system to precisely transfer and align 
individual nanowire or nanotube. Method 2: we developed a self-aligned 
technique to fabricate large numbers (> millions) of excellent nanowire 
devices. Both methods include only the conventional photolithography 
and do not require complicated equipments (such as EBL and FIB), and 
chemical alignment processes. Therefore, these two methods are 
compatible with the standard silicon technology and low-cost 
self-assembly bottom-up approach. We have fabricated a variety of 
nanowire devices, including silicon nanowire field effect transistor 
(SiNW FET), nanoelectromechanical switch (NEMS), nanowire test structure, 
nanowire chemical sensor and optoelectronic device. Compared to other 
nanowire assembling strategies, the self-aligned approach provides a 
clean fabrication route (minimizing possible contamination) and helps 
developing nanowire devices with high performance.

                      March 31, 2008
                         4:30 pm
           Room 301, Research I, Fairfax Campus

Refreshments will be served at 4:15 PM.
----------------------------------------------------------------------
Find the schedule at www.cmasc.gmu.edu/seminar/schedule.html
--------------------------------------------------------------------