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231223s2004 xx ||||| 00| ||eng c |
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|a pubmed24n0499.xml
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|a (DE-627)NLM149574932
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|a (NLM)15274597
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|a DE-627
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|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Jimenez, Victoria L
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Hexanethiolate monolayer protected 38 gold atom cluster
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|c 2004
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 22.05.2006
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|a Date Revised 27.07.2004
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a The nucleation-growth-passivation Brust reaction has been modified so as to enrich the product in useful quantities of a 38-atom gold nanoparticle coated with a hexanethiolate monolayer. Two modifications are described, using -78 degrees C reduction temperature and a hyperexcess of thiol. Compositional evidence is presented that establishes the product as a Au38(C6)24 hexanethiolate monolayer protected cluster (MPC), based on transmission electron microscopy, laser ionization-desorption mass spectrometry, thermogravimetric analysis, and elemental analysis. Reverse phase HPLC confirms the relatively good monodispersity of the MPC products, but high-resolution double-column HPLC reveals that the MPCs are a mixture of closely related but chromatographically distinct products. Voltammetry, low energy spectrophotometry, and spectroelectrochemistry reveal, respectively, a 1.6 eV electrochemical energy gap between the first oxidation and the first reduction, an optical HOMO-LUMO energy absorbance edge at 1.3 eV, and a bleaching of optical absorbance near the 1.3 eV band edge that accompanies electrochemical oxidation of the nanoparticle
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|a Journal Article
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1 |
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|a Georganopoulou, Dimitra G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a White, Ryan J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Harper, Amanda S
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mills, Allan J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lee, Dongil
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Murray, Royce W
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 20(2004), 16 vom: 03. Aug., Seite 6864-70
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:20
|g year:2004
|g number:16
|g day:03
|g month:08
|g pages:6864-70
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