Source:http://linkedlifedata.com/resource/pubmed/id/14527461
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
2
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| pubmed:dateCreated |
2003-10-6
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| pubmed:abstractText |
The second-order optical nonlinearity of CdS nanoparticles with different mean diameters of 28.0, 30.0, 31.5, 50.0, and 91.0 A was studied by the incoherent hyper-Rayleigh scattering technique. Results show that the first-order hyperpolarizability beta value per CdS particle decreases with decreasing size from 91.0 to 31.5 A; however, as CdS particle size further decreases, this trend is reversed and the beta value increases. Substantially, the normalized value of the first-order hyperpolarizability per CdS formula unit, beta(0), exhibits systematic enhancement with decreasing size. This is interpreted in terms of a so-called surface contribution mechanism. The two aspects of quantum size effects, the size dependence of optical band-gap and oscillator strength, cannot be adopted to explain the size dependence of the second-order optical nonlinearity of CdS nanoparticles.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Oct
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| pubmed:issn |
0021-9797
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:day |
15
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| pubmed:volume |
266
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
377-81
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| pubmed:dateRevised |
2009-11-11
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| pubmed:year |
2003
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| pubmed:articleTitle |
Size dependence of second-order optical nonlinearity of CdS nanoparticles studied by hyper-Rayleigh scattering.
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| pubmed:affiliation |
National Laboratory of Molecular and Biomolecular Electronics, Southeast University, 210096, Nanjing, People's Republic of China.
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| pubmed:publicationType |
Journal Article
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