Effect of capping agent on the particle size of CdSe nanoparticles

CdSe nanoparticles were synthesized by green route and chemical route methods. In the green route method the samples were capped by starch and in the chemical route method the samples were capped by mercaptoacetic acid (MAA). The samples were characterized by powder X‐ ray diffraction (XRD) and tran...

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Published in:Luminescence (Chichester, England) England), 2016-11, Vol.31 (7), p.1400-1406
Main Authors: Sahu, Narsing, Brahme, Namita, Sharma, Ravi
Format: Article
Language:English
Subjects:
Absorption spectra
Blue shift
Cadmium Compounds - chemistry
Cadmium selenides
Capping
CdSe nanoparticles
Intermetallics
Light
Luminescence
Microscopy, Electron, Transmission
Nanoparticles - chemistry
Particle Size
photoluminescence
Selenium Compounds - chemistry
Spectra
Spectroscopy, Fourier Transform Infrared
Starches
surface passivation
TEM
Transmission electron microscopy
XRD
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creator Sahu, Narsing
Brahme, Namita
Sharma, Ravi
description CdSe nanoparticles were synthesized by green route and chemical route methods. In the green route method the samples were capped by starch and in the chemical route method the samples were capped by mercaptoacetic acid (MAA). The samples were characterized by powder X‐ ray diffraction (XRD) and transmission electron microscopy (TEM). Both the samples showed zinc blend structure. The optical absorption spectra and Fourier transform infrared (FTIR) spectra were also studied. A blue shift was seen in the absorption spectra as compared with the bulk as well as the sample capped by starch. TEM images showed agglomeration for the starch‐capped sample as compared with the MAA‐capped sample. The particle size for the sample capped by MAA was found to be less as compared with the starch‐capped sample. A blue shift in the photoluminescence (PL) spectra was also recorded for the samples prepared by the chemical route as compared with the sample prepared by the green route as well as the bulk. The PL peak shifted towards the red side and increase in the peak intensity occurred with the change in the excitation wavelength. Change in PL intensity was observed with different pH at 685 nm. Copyright © 2016 John Wiley & Sons, Ltd.
doi_str_mv 10.1002/bio.3123
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In the green route method the samples were capped by starch and in the chemical route method the samples were capped by mercaptoacetic acid (MAA). The samples were characterized by powder X‐ ray diffraction (XRD) and transmission electron microscopy (TEM). Both the samples showed zinc blend structure. The optical absorption spectra and Fourier transform infrared (FTIR) spectra were also studied. A blue shift was seen in the absorption spectra as compared with the bulk as well as the sample capped by starch. TEM images showed agglomeration for the starch‐capped sample as compared with the MAA‐capped sample. The particle size for the sample capped by MAA was found to be less as compared with the starch‐capped sample. A blue shift in the photoluminescence (PL) spectra was also recorded for the samples prepared by the chemical route as compared with the sample prepared by the green route as well as the bulk. The PL peak shifted towards the red side and increase in the peak intensity occurred with the change in the excitation wavelength. Change in PL intensity was observed with different pH at 685 nm. 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The PL peak shifted towards the red side and increase in the peak intensity occurred with the change in the excitation wavelength. Change in PL intensity was observed with different pH at 685 nm. 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1522-7243
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subjects Absorption spectra
Blue shift
Cadmium Compounds - chemistry
Cadmium selenides
Capping
CdSe nanoparticles
Intermetallics
Light
Luminescence
Microscopy, Electron, Transmission
Nanoparticles - chemistry
Particle Size
photoluminescence
Selenium Compounds - chemistry
Spectra
Spectroscopy, Fourier Transform Infrared
Starches
surface passivation
TEM
Transmission electron microscopy
XRD
title Effect of capping agent on the particle size of CdSe nanoparticles
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