News Column

Reports Summarize Interface Science Findings from University of Rennes

June 17, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Data detailed on Interface Science have been presented. According to news originating from Rennes, France, by VerticalNews correspondents, research stated, "Herein, we describe the self-assembling of gold nanorods (GNRs) induced during the ligand exchange at their surface. An exchange reaction between tricysteine PEGylated peptidic ligands and cetyltrimethylammonium bromide (CTAB)-protected gold nanorods is conducted."

Our news journalists obtained a quote from the research from the University of Rennes, "We demonstrated that the terminal group charge (positively or negatively charged) and the hydrophobicity of the peptidic ligands (bearing or not an undecanoyl chain) strongly affects the self-organization of the GNRs occurring in solution. Adjusting the amount of short PEGylated peptides causes a self-organization of the gold nanorods in solution, resulting in a red- or blue-shift of the plasmon bands. The decrease of their surface charge and the self-assembling in solution were first shown by zetametry, by Dynamic Light Scattering and UV-spectroscopy. Thanks to Small Angle X-ray Scattering experiments and Transmission Electron Microscopy images, the self-organization of the nanorods in solution was clearly demonstrated and correlated to the spectroscopic change in absorbance. Conversely, in the case of longer PEGylated peptidic ligands including an undecanoyl chain, the GNRs are particularly stable against aggregation for several days after purification."

According to the news editors, the research concluded: "By controlled drying on a substrate, we showed their ability to self-organize into well-defined ordered structures making them very attractive as building blocks to design optical materials."

For more information on this research see: Replacement of CTAB with peptidic ligands at the surface of gold nanorods and their self-assembling properties. Journal of Colloid and Interface Science, 2014;424():90-97. Journal of Colloid and Interface Science can be contacted at: Academic Press Inc Elsevier Science, 525 B St, Ste 1900, San Diego, CA 92101-4495, USA. (Elsevier -; Journal of Colloid and Interface Science -

The news correspondents report that additional information may be obtained from C. Hamon, University of Rennes, Inst Phys Rennes, UMR CNRS 6251, F-35042 Rennes, France. Additional authors for this research include T. Bizien, F. Artzner, P. Even-Hernandez and V. Marchi.

Keywords for this news article include: Rennes, France, Europe, Interface Science

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Source: Journal of Technology