Shock processing of amorphous carbon nanodust

Roy, A and Singh, SV and Ambresh, M and Sahu, D and Meka, JK and Ramachandran, R and Samarth, P and Pavithraa, S and Jayaram, V and Hill, H and Cami, J and Rajasekhar, BN and Janardhan, P and Bhardwaj, A and Mason, NJ and Sivaraman, B (2022) Shock processing of amorphous carbon nanodust. In: Advances in Space Research .

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Abstract

Our understanding on the role of amorphous carbon in the interstellar medium to form complex structures, such as carbon nanotube/graphene/fullerene, is limited to date. We have investigated how shocks may induce physico-chemical transformation in amorphous carbon by subjecting samples of carbon nanopowder to high-temperature shocks, ∼7300 K, in a hydrogen-free environment for about 2 ms using a shock tube. The shock conditions achieved in the laboratory mimics low velocity interstellar shocks. Post shock samples were analyzed using Raman Spectroscopy and High Resolution – Transmission Electron Microscopy. We have found compelling evidence for the formation of carbon nanotube, graphene, and various other carbon nanostructures induced by the shock. Our results show that shocks in the interstellar medium can provide important chemical pathways to the formation of fullerenes and suggests that other carbonaceous structures may be present as well.

Item Type:	Journal Article
Publication:	Advances in Space Research
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd.
Keywords:	Amorphous carbon; Carbon nanotubes; Graphene; High resolution transmission electron microscopy, Astrochemistry; Carbon nano-structures; Interstellar dust; Interstellar medias; Interstellar space; Shock processing; Shock tube in astrochemistry research; Shock wave in interstellar space; Shock-waves, Shock tubes
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	23 Aug 2022 05:39
Last Modified:	23 Aug 2022 05:39
URI:	https://eprints.iisc.ac.in/id/eprint/76171

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