Nanowires: Small 4/2010

The cover picture shows a microfluidic channel between two reservoirs made of SiN on a SiO2 substrate. In the channel lies several microelectrodes made of platinum. ZnO nanowires are grown from nanoparticles deposited on the electrodes using AC dielectrophoresis. The device shows n-type transport characteristics with 4 to 6 orders of magnitude modulation of conductance. ZnO nanowires are thereafter functionalized with 3-aminopropyltriethoxysilane to be used as pH sensors. For more information, please read the Full Paper “Site-Specific Self-Assembled Liquid-Gated ZnO Nanowire Transistors for Sensing Applications” by K. Balasubramanian et al., beginning on page 589.