1. Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
2. Department of Mechanical Engineering Stanford University Stanford CA 94305 USA
3. Stanford Nano Shared Facilities Stanford University Stanford CA 94305 USA
4. Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo Park CA 94025 USA
5. Division of Mechanical Systems Engineering Sookmyung Women's University Seoul 04310 South Korea