| A facile "green" synthesis of ascorbic acid-capped ZnSe nanoparticles. | |
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MedLine Citation:
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PMID: 20417073 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A simple, green room temperature synthesis of ascorbic acid-capped ZnSe nanoparticles is hereby reported. By varying the pH of the solution, the temporal evolution of the optical properties and shape of the nanocrystals was investigated. The nanoparticles were characterized by UV-vis absorption and photoluminescence spectroscopy (PL), transmission electron microscope (TEM) and infra-red spectroscopy (IR). All the particles exhibited quantum confinement in their optical spectra. An atypical optical spectrum was observed at pH 11 after 5h attributed to digestive ripening and shrinkage of ZnSe core. From the TEM image we inferred that the reaction is kinetically driven at pH 7 producing elongated particles as the reaction times increases, while spherical particles are produced at pH 4 and 11. The IR spectroscopy confirmed the capping of ascorbic acid and its deprotonation to give ascorbate ions. |
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Authors:
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Oluwatobi S Oluwafemi; N Revaprasadu; Olufemi O Adeyemi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-04-04 |
Journal Detail:
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Title: Colloids and surfaces. B, Biointerfaces Volume: 79 ISSN: 1873-4367 ISO Abbreviation: Colloids Surf B Biointerfaces Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-05-24 Completed Date: 2010-08-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9315133 Medline TA: Colloids Surf B Biointerfaces Country: Netherlands |
Other Details:
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Languages: eng Pagination: 126-30 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Chemistry and Chemical Technology, Walter Sisulu University, Mthatha, Eastern Cape, South Africa. oluwafemi.oluwatobi@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Ascorbic Acid
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chemistry* Hydrogen-Ion Concentration Microscopy, Electron, Transmission Nanoparticles / chemistry*, ultrastructure Selenium Compounds / chemical synthesis*, chemistry Spectrophotometry, Infrared Temperature Zinc Compounds / chemical synthesis*, chemistry |
| Chemical | |
Reg. No./Substance:
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0/Selenium Compounds; 0/Zinc Compounds; 1315-09-9/zinc selenide; 50-81-7/Ascorbic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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