Reach Us +441474556909
Polyelectrolytestabilized Gold Nanoparticles Of Different Size And Shape | 6553
ISSN: 2157-7439

Journal of Nanomedicine & Nanotechnology
Open Access

Like us on:

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)
All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Polyelectrolytestabilized gold nanoparticles of different size and shape

International Conference and Exhibition on Nanotechnology & Nanomedicine

Joachim Koetz

ScientificTracks Abstracts: J Nanomedic Nanotechnol

DOI: 10.4172/2157-7439.S1.02

The synthesis of well defined nanoparticles in the size range < 100 nm has received much attention since they can offer highly promising and novel options for a wide range of technical applications. Gold nanoparticles are of special interest due to their prominent optical resonance in the visible range and their shape dependent optical properties. Several methods can be employed for the synthesis of gold nanoparticles. An example of widespread usage is the water based reduction of a diluted tetrachloroaureate solution by citrate, introduced by Turkevich. Nevertheless, the stability of the formed gold nanoparticles is limited due to the fact that they are only electrostatically stabilized. Recently, it was shown that polyelectrolytes can reduce a gold chloride solution, too, and can stabilize gold nanoparticles of very small dimensions. The advantage of this procedure is that the produced gold nanoparticles are much more stable, that means electrosterically stabilized. We have checked different types of polyelectrolytes as potential new agents as reducing and stabilizing agent: By using oligosaccharide-modified poly (ethyleneimines) (PEI) fluorescent, biocompatible core-shell gold nanoparticles with particle diameters of about 3 nm can be produced. In presence of a vesicle template phase gold nanorods and large triangular structures are formed. In comparison to this water based processes the reduction process with PEI can be realized also in ionic liquids and in microemulsions. The finally obtained gold nanoparticles can be used as fluorescent markers and can be successfully incorporated into biosensors.
Joachim Koetz studied chemistry at the Martin-Luther University Halle/Wittenberg and obtained his PhD in 1986 from the Academy of Science. He worked in the Institute of Polymer Chemistry in Teltow- Seehof, and since 1994 he has been Professor of Colloid Chemistry at the University of Potsdam. His main interests are polyelectrolytes, liquid crystalline systems and microemulsions as template phases for the nanoparticle formation. He published above 140 papers (including 2 books and above 10 book chapters), and gave more than 100 lectures at national and international conferences