1. Department of Physics, Kent State University, Kent, Ohio 44240, USA
2. Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44240, USA
3. Institute for Microsensors, Microactuators, and Microsystems (IMSAS), University of Bremen, Bremen 28359, Germany
4. Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, Ohio 44240, USA