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  • Optical properties of CdSe nanoparticles embedded in polyvinyl alcohol matrix.

Optical properties of CdSe nanoparticles embedded in polyvinyl alcohol matrix.

Journal of nanoscience and nanotechnology (2013-05-08)
Susnata Bera, Suvra Prakash Mondal, Samit K Ray
PMID23646730
ABSTRACT

Polymer capped CdSe nanoparticles have been grown using a simple chemical process. Transmission electron microscopy study revealed the formation of isolated CdSe nanoparticles encapsulated in polyvinyl alcohol matrix. The optical band gap of nanoparticle has been found to be blue shifted from the bulk value due to quantum confinement of carriers. The recombination dynamics of polymer encapsulated nanoparticles has been studied in details using time resolved photoluminescence measurements. Room temperature photoluminescence decay has been used to explain the biexponential decay characteristics originated from the delocalized and localized carriers. The spectral photocurrent measurements of CdSe-polymer composite materials have also been studied.

MATERIALS
Product Number
Brand
Product Description
24-3745
Sigma-Aldrich
Poly(vinyl alcohol), SAJ first grade, degree of polymerization 500
10852
Sigma-Aldrich
Mowiol® 10-98, Mw ~61,000
10853
Sigma-Aldrich
Mowiol® 6-98, Mw ~47,000
81381
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81383
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363081
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Poly(vinyl alcohol), average Mw 85,000-124,000, 87-89% hydrolyzed
341584
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363073
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Poly(vinyl alcohol), Mw 31,000-50,000, 98-99% hydrolyzed
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Poly(vinyl alcohol), Mw 85,000-124,000, 99+% hydrolyzed
363170
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Poly(vinyl alcohol), Mw 13,000-23,000, 87-89% hydrolyzed
348406
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Poly(vinyl alcohol), average Mw 13,000-23,000, 98% hydrolyzed
563900
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360627
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363065
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Poly(vinyl alcohol), Mw 146,000-186,000, 99+% hydrolyzed
81382
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363103
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10851
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10849
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Sigma-Aldrich
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