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Title: | A hydrothermal anvil made of graphene nanobubbles on diamond | Authors: | Lim, Candy Haley Yi Xuan Sorkin, Anastassia Bao, Qiaoliang Li, Ang Zhang, Kai NESLADEK, Milos Loh, Kian Ping |
Issue Date: | 2013 | Publisher: | NATURE PUBLISHING GROUP | Source: | NATURE COMMUNICATIONS, 4 | 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 | Keywords: | Multidisciplinary Sciences | Document URI: | http://hdl.handle.net/1942/15427 | e-ISSN: | 2041-1723 | DOI: | 10.1038/ncomms2579 | ISI #: | 000318873900010 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2014 |
Appears in Collections: | Research publications |
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