Linked Life Data

18568389

Source:http://linkedlifedata.com/resource/pubmed/id/18568389

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2009-12-21
pubmed:abstractText
In this work, polysorbate surfactants with same functional groups but with varying molecular masses (Tween-80, Tween-40 and Tween-20) in different concentrations (0.1% to 20% w/w) were used to study the effect of the length of the surfactant chain on the luminescence of the entrapped TOPO-capped CdSe nanocrystals. Various phospholipids with different functional headgroups such as ethylene glycol (-PEG) and amine (-NH2) were used to improve biocompatibility and provide sites for bioconjugation respectively. It is understood that that the hydrophobic ends of the surfactant binds with the water repelling groups of the cap layer, thus modifying the CdSe cap layer and making it soluble in aqueous media. It was observed that the PL emission intensity of CdSe increases with increase in concentration of Tween-series surfactant unlike in the case of thiol-coated CdSe nanoparticles. However, higher PL intensity was obtained in the case of stoichiometric CdSe with Tween-40 corresponding to 20% w/w. The efficient PL sustainability of water-soluble CdSe QD's can be attributed to the simpler chain structure of Tween-40 surfactant resulting in better passivation of the micelle.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1573-4838
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
20 Suppl 1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
S123-30
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Formation of water-soluble and biocompatible TOPO-capped CdSe quantum dots with efficient photoluminescence.
pubmed:affiliation
Electronic Materials Division, National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110 012, India.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Evaluation Studies