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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.8b03840
|2 doi
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|a pubmed24n0973.xml
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|a (DE-627)NLM292055749
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|a (NLM)30576151
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Ruks, Tatjana
|e verfasserin
|4 aut
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| 245 |
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|a Solution NMR Spectroscopy with Isotope-Labeled Cysteine (13C and 15N) Reveals the Surface Structure of l-Cysteine-Coated Ultrasmall Gold Nanoparticles (1.8 nm)
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 20.11.2019
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Ultrasmall gold nanoparticles with a diameter of 1.8 nm were synthesized by reduction of tetrachloroauric acid with sodium borohydride in the presence of l-cysteine, with natural isotope abundance as well as 13C-labeled and 15N-labeled. The particle diameter was determined by high-resolution transmission electron microscopy and differential centrifugal sedimentation. X-ray photoelectron spectroscopy confirmed the presence of metallic gold with only a few percent of oxidized Au(+I) species. The surface structure and the coordination environment of the cysteine ligands on the ultrasmall gold nanoparticles were studied by a variety of homo- and heteronuclear NMR spectroscopic techniques including 1H-13C-heteronuclear single-quantum coherence and 13C-13C-INADEQUATE. Further information on the binding situation (including the absence of residual or detached l-cysteine in the solution) and on the nanoparticle diameter (indicating the well-dispersed state) was obtained by diffusion-ordered spectroscopy (1H-, 13C-, and 1H-13C-DOSY). Three coordination environments of l-cysteine on the gold surface were identified that were ascribed to different crystallographic sites, supported by geometric considerations of the nanoparticle ultrastructure. The particle size data and the NMR-spectroscopic analysis gave a particle composition of about Au174(cysteine)67
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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1 |
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|a Beuck, Christine
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Schaller, Torsten
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Niemeyer, Felix
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zähres, Manfred
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Loza, Kateryna
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Heggen, Marc
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hagemann, Ulrich
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mayer, Christian
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bayer, Peter
|e verfasserin
|4 aut
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| 700 |
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|a Epple, Matthias
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 35(2019), 3 vom: 22. Jan., Seite 767-778
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:35
|g year:2019
|g number:3
|g day:22
|g month:01
|g pages:767-778
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|u http://dx.doi.org/10.1021/acs.langmuir.8b03840
|3 Volltext
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