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Effect of surface grafting coefficient and chain length of fatty acids on the luminescence of neodymium(3+)-doped LaF3 nanoparticles

DSpace at IIT Bombay

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Title Effect of surface grafting coefficient and chain length of fatty acids on the luminescence of neodymium(3+)-doped LaF3 nanoparticles
 
Creator NAMPOOTHIRI, PK
GANDHI, MN
KULKARNI, AR
 
Subject UP-CONVERSION
OPTICAL-PROPERTIES
HYBRID MATERIALS
LANTHANIDE IONS
NANOCRYSTALS
DEPENDENCE
PROBES
 
Description The challenge in synthesising lanthanide-doped nanoparticles (NPs) is the shielding of lanthanide luminescence from the quenching ions around the NPs. In this work, the effects of chain length and surface grafting coefficient (average number of molecules per nm(2) (xi)) of functionalising fatty acids on the luminescence intensity of LaF3:Nd3+ NPs were investigated. Nearly 14-fold enhancements in luminescence intensity were observed as the oleic acid surface grafting coefficient increased from 0 to 5.7. This increase in luminescence intensity is attributed to the shielding of the NP surfaces from surrounding quenching ions such as OH-, by the fatty acid molecules. In view of the changing ligand length, different fatty acids (decanoic acid, hexanoic acid, oleic acid, octanoic acid, and tetradecanoic acid) were used to functionalise the NPs. A 1 nm increase in fatty acid chain length resulted in a threefold increase in luminescence intensity.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2016-01-15T06:59:13Z
2016-01-15T06:59:13Z
2015
 
Type Article
 
Identifier JOURNAL OF MATERIALS CHEMISTRY C, 3(8)1817-1822
2050-7526
2050-7534
http://dx.doi.org/10.1039/c4tc02646b
http://dspace.library.iitb.ac.in/jspui/handle/100/17993
 
Language en