1. Department
of Mechanical Engineering
and the Materials Science and Engineering Program, The University of Texas at Austin, 1 University Station
C2200, Austin, Texas 78712, United States
2. CNR-IDASC Sensor Lab Department
of Chemistry and Physics, University of Brescia, via Valotti, 9, Brescia 25133, Italy
3. Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, Texas 75083,
United States
4. Department
of Physics and Center
for Nano and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712, United States