1. Department of Chemical Engineering Stanford University Stanford CA 94305‐5025 USA
2. School of Polymer Science and Engineering The University of Southern Mississippi Hattiesburg MS 39406 USA
3. King Abdullah University of Science and Technology (KAUST) Kaust Solar Center (KSC) Thuwal 23955‐6900 Saudi Arabia
4. Department of Mechanical Engineering Stanford University Stanford CA 94305 USA
5. Department of Materials Science & Engineering Stanford University Stanford CA 94305 USA