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Formation of hollow carbon nanoshells from thiol stabilised silver nanoparticles via heat treatment

Watts, Julie A.; Fay, Mike W.; Rance, Graham A.; Brown, Paul D.; Khlobystov, Andrei N.

Authors

Julie A. Watts

Graham A. Rance

Paul D. Brown

Andrei N. Khlobystov



Abstract

Uniform, less 10 nm sized, hollow carbon nano-shells (HCNS) have been prepared via a single-step, thermal treatment of alkanethiol stabilised Ag nanoparticles (TS-AgNP). Direct evidence for the formation of spherical HCNS from TS-AgNP is provided by in situ MEMS heating on Si3N4 supports within a TEM, and ex situ thermal processing of TS-AgNP on carbon nanotube supports. A mechanism is proposed for the thermally driven, templated formation of HCNS from the TS-AgNP stabilising layer, with Ag catalysing the graphitisation of carbon in advance of thermally induced AgNP template removal. This facile processing route provides for excellent size control of the HCNS product via appropriate AgNP template selection. However, a rapid rate of heating was found to be crucial for the formation of well-defined HCNS, whilst a slow heating rate gave a much more disrupted product, comprising predominantly lacy carbon with decreased levels of graphitic ordering, reflecting a competition between the thermal transformation of the TS-layer and the rate of removal of the AgNP template.

Journal Article Type Article
Publication Date Nov 30, 2018
Journal Carbon
Print ISSN 0008-6223
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 139
Pages 538-544
APA6 Citation Watts, J. A., Fay, M. W., Rance, G. A., Brown, P. D., & Khlobystov, A. N. (2018). Formation of hollow carbon nanoshells from thiol stabilised silver nanoparticles via heat treatment. Carbon, 139, 538-544. doi:10.1016/j.carbon.2018.06.074
DOI https://doi.org/10.1016/j.carbon.2018.06.074
Publisher URL https://www.sciencedirect.com/science/article/pii/S0008622318306407?via%3Dihub

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