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Plasma synthesis of nanodiamonds in ethanol

In this work, we examined the characteristics of the plasma formed by fs laser filamentation in ethanol that affected the nanodiamonds formation by optical emission spectroscopy. Molecular and atomic C species were detected in the plasma as the precursors to the nanodiamonds formed; above the thresh...

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Main Authors:	Nee, Chen Hon, Lee, Ming Chuan, Poh, Hun Seng, Yap, Seong Ling, Tou, Teck Yong, Yap, Seong Shan
Format:	Article
Published:	Elsevier 2019
Subjects:	Q Science (General) QC Physics TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.um.edu.my/20021/ https://doi.org/10.1016/j.compositesb.2018.10.071
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spelling	my.um.eprints.200212020-02-03T02:14:57Z http://eprints.um.edu.my/20021/ Plasma synthesis of nanodiamonds in ethanol Nee, Chen Hon Lee, Ming Chuan Poh, Hun Seng Yap, Seong Ling Tou, Teck Yong Yap, Seong Shan Q Science (General) QC Physics TA Engineering (General). Civil engineering (General) In this work, we examined the characteristics of the plasma formed by fs laser filamentation in ethanol that affected the nanodiamonds formation by optical emission spectroscopy. Molecular and atomic C species were detected in the plasma as the precursors to the nanodiamonds formed; above the threshold laser energy of 360 μJ. Thus, the generation of homogeneous nanodiamonds was identified to be occurred within laser energy of 360–550 μJ where atomic C, ionized C and C2 clusters coexisted. The process of fs laser filamentation is monitored with in-situ absorbance measurement of ethanol. The intensity of the absorbance peak of the sample at ∼228 nm, corresponds to intrinsic absorbance of diamond (σ→ σ* transition) was observed to increase with irradiation time. The prepared samples are characterized by using Raman spectroscopy, XPS and TEM. Nanodiamonds of <5 nm in size were produced. Photoluminescence measurements show that the sample fluoresce at ∼490 nm, when excited by 266 nm, 355 nm, 368 nm and 406 nm laser while additional photoluminescence peak is detected at 329 nm when excited by 266 nm laser. Elsevier 2019 Article PeerReviewed Nee, Chen Hon and Lee, Ming Chuan and Poh, Hun Seng and Yap, Seong Ling and Tou, Teck Yong and Yap, Seong Shan (2019) Plasma synthesis of nanodiamonds in ethanol. Composites Part B: Engineering, 162. pp. 162-166. ISSN 1359-8368 https://doi.org/10.1016/j.compositesb.2018.10.071 doi:10.1016/j.compositesb.2018.10.071
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	Q Science (General) QC Physics TA Engineering (General). Civil engineering (General)
spellingShingle	Q Science (General) QC Physics TA Engineering (General). Civil engineering (General) Nee, Chen Hon Lee, Ming Chuan Poh, Hun Seng Yap, Seong Ling Tou, Teck Yong Yap, Seong Shan Plasma synthesis of nanodiamonds in ethanol
description	In this work, we examined the characteristics of the plasma formed by fs laser filamentation in ethanol that affected the nanodiamonds formation by optical emission spectroscopy. Molecular and atomic C species were detected in the plasma as the precursors to the nanodiamonds formed; above the threshold laser energy of 360 μJ. Thus, the generation of homogeneous nanodiamonds was identified to be occurred within laser energy of 360–550 μJ where atomic C, ionized C and C2 clusters coexisted. The process of fs laser filamentation is monitored with in-situ absorbance measurement of ethanol. The intensity of the absorbance peak of the sample at ∼228 nm, corresponds to intrinsic absorbance of diamond (σ→ σ* transition) was observed to increase with irradiation time. The prepared samples are characterized by using Raman spectroscopy, XPS and TEM. Nanodiamonds of <5 nm in size were produced. Photoluminescence measurements show that the sample fluoresce at ∼490 nm, when excited by 266 nm, 355 nm, 368 nm and 406 nm laser while additional photoluminescence peak is detected at 329 nm when excited by 266 nm laser.
format	Article
author	Nee, Chen Hon Lee, Ming Chuan Poh, Hun Seng Yap, Seong Ling Tou, Teck Yong Yap, Seong Shan
author_facet	Nee, Chen Hon Lee, Ming Chuan Poh, Hun Seng Yap, Seong Ling Tou, Teck Yong Yap, Seong Shan
author_sort	Nee, Chen Hon
title	Plasma synthesis of nanodiamonds in ethanol
title_short	Plasma synthesis of nanodiamonds in ethanol
title_full	Plasma synthesis of nanodiamonds in ethanol
title_fullStr	Plasma synthesis of nanodiamonds in ethanol
title_full_unstemmed	Plasma synthesis of nanodiamonds in ethanol
title_sort	plasma synthesis of nanodiamonds in ethanol
publisher	Elsevier
publishDate	2019
url	http://eprints.um.edu.my/20021/ https://doi.org/10.1016/j.compositesb.2018.10.071
_version_	1657488191936004096
score	13.244369

Plasma synthesis of nanodiamonds in ethanol

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