Funding for this research was provided by:
National Science Foundation (CHE-1465248, DMR-14207090)
Army Research Office (W911NF1410403)
Received: 10 September 2018
Accepted: 21 October 2018
First Online: 31 October 2018
Compliance with ethical standards
: This study was financially supported in part by the National Science Foundation through NSF Grant CHE-1465248 and Materials Research Science and Engineering Center (MRSEC) grant DMR-14207090, and Department of Defense Army Research Office (ARO) through MURI grant W911NF1410403.
: Fikret Aydin declares that he has no conflict of interest. Harshwardhan H. Katkar declares that he has no conflict of interest. Gregory A. Voth declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.