Scanning tunneling microscopy study and nanomanipulation of graphene-coated water on mica.

Autor: He KT; Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States., Wood JD, Doidge GP, Pop E, Lyding JW
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2012 Jun 13; Vol. 12 (6), pp. 2665-72. Date of Electronic Publication: 2012 May 31.
DOI: 10.1021/nl202613t
Abstrakt: We study interfacial water trapped between a sheet of graphene and a muscovite (mica) surface using Raman spectroscopy and ultrahigh vacuum scanning tunneling microscopy (UHV-STM) at room temperature. We are able to image the graphene-water interface with atomic resolution, revealing a layered network of water trapped underneath the graphene. We identify water layer numbers with a carbon nanotube height reference. Under normal scanning conditions, the water structures remain stable. However, at greater electron energies, we are able to locally manipulate the water using the STM tip.
Databáze: MEDLINE