Disclosure of potential conflicts of interest
No potential conflicts of interest were disclosed.
Acknowledgments
We thank members of the Center of Functional Nanotechnology at BNL for providing scientific insights and technological support. Grateful acknowledgement is given to Camy Deck for her valuable input and extraordinary patience.
Funding
Research was carried out in part at the Center for Functional Nanomaterials, Proposal no. 30097, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract no. DE-AC02-98CH10886.