Highly Stable Operation of Metal Oxide Nanowire Transistors in Ambient Humidity, Water, Blood, and Oxygen

作者：Lim Taekyung; Bong Jihye; Mills Edmund M; Kim Sangtae^*; Ju Sanghyun

来源：ACS Applied Materials & Interfaces, 2015, 7(30): 16296-16302.

DOI：10.1021/acsami.5b03038

• sensing selectivity
• nanowire transistor
• self-assembled monolayer
• environmental stability
• hydrophobicity

The,capability-for robust operation of nanoscale transistors under harsh environments is equally important as their operating parameters such as high on-currents, high mobility, and: high sensing selectivity. For electronic/biomedical applications, in particular, transistor operation must be stable under diverse conditions including ambient humidity, water, blood, and oxygen. Here we demonstrate the use of a self-assembled monolayer of octadecylphosphonic acid (OD-PA) to passivate a functionalized nanowire transistor, allowing the device to operate consistently in such environments. in contrast, without passivation, the characteristics (especially the threshold voltage) of identical nanowire transistors Were dramatically altered under these conditions. Furthermore, the OD-PA-passivated transistor shows no signs of long-term stability deterioration and maintains equally high sensing selectivity to light under the harsh environments because of OD-PA's optical transparency. These results demonstrate the suitability of OD-PA passivation methods for fabricating commercial nanoelectronics.

• 出版日期2015-8-5