1. Center for Energy Harvesting Materials and Systems (CEHMS), Bio-Inspired Materials and Devices Laboratory (BMDL), Center for Intelligent Material Systems and Structure (CIMSS), Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061yonas@vt.eduyonas@vt.edu;
2. Center for Energy Harvesting Materials and Systems (CEHMS), Bio-Inspired Materials and Devices Laboratory (BMDL), Center for Intelligent Material Systems and Structure (CIMSS), Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061