Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color

The light-structure interaction was considered for hair color deciphering. Using focused ion beam (FIB) nanomachining and scanning electron microscopy (SEM) imaging, the hair shaft structures were observed, and the effects of light-structure interaction on hair coloration/whitening were analyzed. It...

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Main Authors: Wang, Houxiao, Zhou, Wei
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/107180
http://hdl.handle.net/10220/25363
http://dx.doi.org/10.1166/jbt.2014.1181
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1071802019-12-06T22:26:05Z Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color Wang, Houxiao Zhou, Wei School of Mechanical and Aerospace Engineering DRNTU::Engineering::Materials::Biomaterials The light-structure interaction was considered for hair color deciphering. Using focused ion beam (FIB) nanomachining and scanning electron microscopy (SEM) imaging, the hair shaft structures were observed, and the effects of light-structure interaction on hair coloration/whitening were analyzed. It was shown that the outer structural morphologies of the cuticles for both black and white hair shafts were nearly the same (like the stepped and discontinuous antireflection surface relief gratings), and a highly-packed melanin layer, which could make the black hair act like a 'black body' to fully absorb incident photons, clearly located in the joint region between the cortex and the cuticle of the black hair, however, no such melanin layer was found in the white hair shaft. Moreover, the lack of pigments during hair whitening resulted in obvious changes of the inner hair structure, i.e., the melanin granules in the black hair were not observed in the white hair leading to a porous structure consisting of lots of nanoscale hollow spaces, and these nanoholes could act like the nanoscopic mirrors to reflect the incident white light, contributing to the color alteration in the human hair shafts. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2015-04-10T07:29:12Z 2019-12-06T22:26:05Z 2015-04-10T07:29:12Z 2019-12-06T22:26:05Z 2014 2014 Journal Article Wang, H., & Zhou, W. (2014). Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color. Journal of biomaterials and tissue engineering, 4(5), 411-415. 2157-9083 https://hdl.handle.net/10356/107180 http://hdl.handle.net/10220/25363 http://dx.doi.org/10.1166/jbt.2014.1181 en Journal of biomaterials and tissue engineering © 2014 American Scientific Publishers.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Biomaterials
spellingShingle DRNTU::Engineering::Materials::Biomaterials
Wang, Houxiao
Zhou, Wei
Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color
description The light-structure interaction was considered for hair color deciphering. Using focused ion beam (FIB) nanomachining and scanning electron microscopy (SEM) imaging, the hair shaft structures were observed, and the effects of light-structure interaction on hair coloration/whitening were analyzed. It was shown that the outer structural morphologies of the cuticles for both black and white hair shafts were nearly the same (like the stepped and discontinuous antireflection surface relief gratings), and a highly-packed melanin layer, which could make the black hair act like a 'black body' to fully absorb incident photons, clearly located in the joint region between the cortex and the cuticle of the black hair, however, no such melanin layer was found in the white hair shaft. Moreover, the lack of pigments during hair whitening resulted in obvious changes of the inner hair structure, i.e., the melanin granules in the black hair were not observed in the white hair leading to a porous structure consisting of lots of nanoscale hollow spaces, and these nanoholes could act like the nanoscopic mirrors to reflect the incident white light, contributing to the color alteration in the human hair shafts.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Wang, Houxiao
Zhou, Wei
format Article
author Wang, Houxiao
Zhou, Wei
author_sort Wang, Houxiao
title Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color
title_short Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color
title_full Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color
title_fullStr Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color
title_full_unstemmed Focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color
title_sort focused ion beam nanomachining for analyzing effects of light-structure interaction on hair color
publishDate 2015
url https://hdl.handle.net/10356/107180
http://hdl.handle.net/10220/25363
http://dx.doi.org/10.1166/jbt.2014.1181
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