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Graphene is a single layer of graphite sheet; one atom thick sp2-bonded carbon atoms organized on a plane. It has extremely interesting electrical properties, which offers various applications in a number of nanometer scale devices, potentially operating at high frequency ranges. Mechanically exfoliated single and multilayer graphene sheets are prepared on (100) oriented silicon wafers with 300 nm thermal oxide. These graphene layers are characterized by optical microscopy, Atomic Force Microscopy (AFM) and Raman Spectroscopy. A graphene feld effect transistor is fabricated on a 35x9 micron...

The present work is an attempt to understand wetting on very rough surfaces for printing, coating, cooling etc. applications. Various kinds of PDMS (polydimethylsiloxane), deionized water, and glycerin-water (85%-15% vol.) mixture were used to wet the pyramidal arrays and concentric triangular circles, which have scales in millimeters. Wetting of the test substrates were done both in vertical and horizontal orientation, by dipping the substrate in a liquid bath and pumping the liquid through the center of the substrate, respectively. The apparent contact angle on each substrate was measured...