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Defect-rich ZnO quantum dots as a potential multifunctional sunscreen and cosmetic active ingredient

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Title Defect-rich ZnO quantum dots as a potential multifunctional sunscreen and cosmetic active ingredient
 
Creator ASOK, A
KULKARNI, AR
GANDHI, MN
 
Subject HUMAN-SKIN
PHOTOLUMINESCENCE
AUTOFLUORESCENCE
NANOPARTICLES
EMISSION
OXIDE
atomic defects
camouflaging
colloids
cosmetics
fluorescence
inorganic chemistry
inorganic materials
luminescence
Photobiology-16
quantum dots
sunscreen
ZnO
 
Description In sunscreens, ZnO nanoparticles (NPs) are used as inorganic UV filter which have a prominent band edge emission in the UVA region (similar to 385 nm). When applied to biological surface, this highly penetrating UVA emission from ZnO NPs would enhance the generation of reactive oxygen species resulting in oxidative stress. Therefore, the elimination of this harmful UVA emission from ZnO NPs are much sought after for the development of safer sunscreens. In this paper we introduce the use of defect-rich ZnO (D-ZnO) quantum dots (QDs) as a multifunctional active ingredient in sunscreen/cosmetic application. These D-ZnO QDs make use of their defect energy levels to emit in visible region by bypassing their harmful band edge emission at UVA region. The D-ZnO QDs also showed prominent visible luminescence which matches well with the autofluorescence of in vivo human skin. Hence, this visible luminescence could be useful for camouflaging, thereby enabling its potential as a biologically safe active ingredient for both cosmetic and UV screening applications.
 
Publisher WALTER DE GRUYTER GMBH
 
Date 2016-01-15T10:29:16Z
2016-01-15T10:29:16Z
2015
 
Type Article
 
Identifier PURE AND APPLIED CHEMISTRY, 87(42257)971-977
0033-4545
1365-3075
http://dx.doi.org/10.1515/pac-2015-0307
http://dspace.library.iitb.ac.in/jspui/handle/100/18348
 
Language en