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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Tryptophan-functionalized gold nanoparticles for deep UV imaging of microbial cells
Colloids and Surfaces B: Biointerfaces, Volume 135, Year 2015
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Description
Biocompatible fluorescent nanostructures were prepared by a functionalization of gold nanoparticles with the amino acid tryptophan. The gold-tryptophan bioconjugates were investigated by TEM and HRTEM and various spectroscopy methods (XPS, FTIR, UV-vis and photoluminescence). It was found that the gold nanoparticles, initially 8. nm in diameter, aggregate in the presence of the amino acid. From the XPS and FTIR spectroscopy results, it was concluded that the tryptophan gold interactions mainly take place via indole and carboxyl groups. Although the indole group is involved in the interaction with the gold surfaces, the tryptophan-gold hybrids showed strong fluorescence due to the presence of multilayers of tryptophan. Deep ultra violet (DUV) imaging performed at the SOLEIL synchrotron showed that it is possible to detect these hybrid nanostructures within Escherichia coli cells. © 2015 Elsevier B.V.
Authors & Co-Authors
Pajović, Jelena D.
Serbia, Belgrade
University of Belgrade
Dojčilović, Radovan J.
Serbia, Belgrade
University of Belgrade
Božanić, Dušan K.
Serbia, Belgrade
University of Belgrade
Réfrégiers, Matthieu
France, Gif-sur-yvette
Soleil Synchrotron
Dimitrijević-Branković, Suzana I.
Serbia, Belgrade
University of Belgrade
Luyt, Adriaan S.
Qatar, Doha
Qatar University
Djoković, Vladimir
Serbia, Belgrade
University of Belgrade
Statistics
Citations: 37
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.1016/j.colsurfb.2015.08.050
ISSN:
09277765