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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/15427

Title: A hydrothermal anvil made of graphene nanobubbles on diamond
Authors: Lim, Candy Haley Yi Xuan
Sorkin, Anastassia
Bao, Qiaoliang
Li, Ang
Zhang, Kai
Loh, Kian Ping
Issue Date: 2013
Abstract: The hardness and virtual incompressibility of diamond allow it to be used in high-pressure anvil cell. Here we report a new way to generate static pressure by encapsulating single-crystal diamond with graphene membrane, the latter is well known for its superior nano-indentation strength and in-plane rigidity. Heating the diamond-graphene interface to the reconstruction temperature of diamond (similar to 1,275 K) produces a high density of graphene nanobubbles that can trap water. At high temperature, chemical bonding between graphene and diamond is robust enough to allow the hybrid interface to act as a hydrothermal anvil cell due to the impermeability of graphene. Superheated water trapped within the pressurized graphene nanobubbles is observed to etch the diamond surface to produce a high density of square-shaped voids. The molecular structure of superheated water trapped in the bubble is probed using vibrational spectroscopy and dynamic changes in the hydrogen-bonding environment are observed.
Notes: Loh, KP (reprint author), Natl Univ Singapore, Graphene Res Ctr, Dept Chem, Singapore 117543, Singapore. NUS Grad Sch Integrat Sci & Engn, Singapore 117597, Singapore. Bruker Singapore, Singapore 138667, Singapore. Hasselt Univ, IMOMEC, B-3590 Diepenbeek, Belgium. chmlohkp@nus.edu.sg
URI: http://hdl.handle.net/1942/15427
DOI: 10.1038/ncomms2579
ISI #: 000318873900010
ISSN: 2041-1723
Category: A1
Type: Journal Contribution
Validation: ecoom, 2014
Appears in Collections: Research publications

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