K.P.L. acknowledges MOE Tier II grant “From in situ observation to growth scaling of graphene quantum dots (R-143-000-493-112)”.
Observing High-Pressure Chemistry in Graphene Bubbles†
Article first published online: 20 NOV 2013
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 126, Issue 1, pages 219–223, January 3, 2014
How to Cite
Lim, C. H. Y. X., Nesladek, M. and Loh, K. P. (2014), Observing High-Pressure Chemistry in Graphene Bubbles. Angew. Chem., 126: 219–223. doi: 10.1002/ange.201308682
- Issue published online: 23 DEC 2013
- Article first published online: 20 NOV 2013
- Manuscript Received: 5 OCT 2013
- MOE. Grant Number: R-143-000-493-112
Using IR spectroscopy, high-pressure reactions of molecules were observed in liquids entrapped by graphene nanobubbles formed at the graphene–diamond interface. Nanobubbles formed on graphene as a result of thermally induced bonding of its edges with diamond are highly impermeable, thus providing a good sealing of solvents within. Owing to the optical transparency of graphene and diamond, high-pressure chemical reactions within the bubbles can be probed with vibrational spectroscopy. By monitoring the conformational changes of pressure-sensitive molecules, the pressure within the nanobubble can be calibrated as a function of temperature and it is about 1 GPa at 600 K. The polymerization of buckministerfullerene (C60), which is symmetrically forbidden under ambient conditions, is observed to proceed in well-defined stages in the pressurized nanobubbles.