Journal article

Detection of Ring and Adatom Defects in Activated Disordered Carbon via Fluctuation Nanobeam Electron Diffraction

Andrew Martin, Espen D Bojesen, Timothy C Petersen, Cheng Hu, Mark J Biggs, Matthew Weyland, Amelia CY Liu

Small | WILEY-V C H VERLAG GMBH | Published : 2020

Abstract

How the structure of disordered porous carbons evolves during their activation is particularly poorly understood. This problem endures primarily because of a lack of high-resolution 3D techniques for the characterization of amorphous and highly disordered structure. To address this, the measurement of the 3D pair-angle distribution function using nanodiffraction patterns from high-energy electrons is demonstrated. These rich multiatom correlations are measured for a disordered carbon and they clearly show the structural evolution during activation. They provide previously inaccessible bond-angle information and direct evidence for the presence of ring and adatom defects. An increase in the s..

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University of Melbourne Researchers

Grants

Awarded by ARC


Awarded by Australian Research Council


Awarded by VILLUM FONDEN


Funding Acknowledgements

The authors acknowledge use of the facilities at the Monash Centre for Electron Microscopy (FEI Titan3 80-300 FEGTEM funded by ARC LE0454166). A.M. acknowledges funding support from the Australian Research Council Discovery Project grant (DP190103027). A.L. acknowledges funding from the Australian Research Council Future Fellowship (FT180100594). E.B. would like to thank VILLUM FONDEN for the funding via the research grant (VKR023371). E.B. acknowledges funding from the Carlsberg Foundation.