Department of Chemistry
The City College of New York-CUNY

News & Highlights
Scientific American on May 2, 2008 in the news, “A Silver Coating in the Fight against Microbes”.

The New York Times on April 9, 2008 in Technology Innovation, “Harnessing Biology, and Avoiding Oil, for Chemical Goods”.

Prof. John featured in ‘Mathrubhumi’, National Newspaper, India on March 09, 2008.
  Biobased Organic Synthesis  |  Molecular Gels and Drug-Delivery  |  Nanoparticles: Synthesis and Catalysis  |  Polymers and Coatings
Self-Assembled Functional Architectures  |  Undergraduate Research

Research - Nanoparticles: Synthesis and Catalysis

Nanoparticles:-templated synthesis and catalysis. Liquid crystal mediated in situ synthesis of metal nanoparticles (MNPs) and their assembly is a new area of research and has not been explored to any significant extent. We could synthesize and organize gold nanoparticles (GNPs) in various architectures including a helical/twisted fashion by using liquid crystal (LC) phase templates. These results, highlighting the tailoring of nanoparticle assemblies via the novel method of LC templating can have applications in developing displays (by using NP doped LCs), catalysts, sensors and optical filters. The fundamental study described here could enhance our present knowledge in engineering NPs for the development of novel tailored material systems. This new technology could impact development in nanotechnology by bringing a new set of materials and tools for commercial applications.

Related Publications:

Kumar, A., Vemula, P., Ajayan, P. M., John, G. ‘Silver Nanoparticles Embedded Anti-microbial Paints Based on Vegetable Oil’. Nature Materials, 7, 236-241 (2008).

Vemula, P. K., Mallia, V., Bizati, K., John, G. ‘Cholesterol Phenoxy Hexanoate Mesogens: Effect of meta Substituents on Their Liquid Crystalline Behavior and In Situ Metal Nanoparticle Synthesis’ Chem Mater. 19, 5203-5206 (2007).

Ajay Mallia, V., Vemula, P., John, G, Kumar, A., Ajayan, P. M. ‘In Situ Synthesis and Assembly of Gold Nanoparticles Embedded Glass Forming Liquid Crystals’ Angew. Chem. Int. Ed. 46, 3269-3274 (2007). Highlights in MRS 360, ‘Image in Focus’ May 2007.

Vemula, P., Aslam, U., Mallia, A., John, G. ‘In Situ Synthesis of Gold Nanoparticles Using Molecular Gels and Liquid Crystals from Vitamin-C Amphiphiles’ Chem. Mat. 19, 138-140 (2007).

Ashavani Kumar, Saravanababu Murugesan, Victor Pushparaj, Caterina Soldano, Jin Xie, George John, Omkaram Nalamasu, Robert J. Linhardt, Pulickel M. Ajayan, ‘Ionic liquid induced formation of conducting organic nanotubes-new hybrid materials for device applications’ Small 3, 3: 429-433 (2007).

Vemula, P., John, G. ‘Smart Amphiphiles: Hydro/Organogelators for In Situ Reduction of Gold’ Chem. Commun, 2218-2220 (2006). Front cover page feature.

Zhu, H., George John, Wei, B. Synthesis of Assembled Copper Nanoparticles from Copper-Chelating Glycolipid Nanotubes, Chem. Phys. Lett. 405, 49 (2005).


Department of Chemistry | Division of Science | The City College of New York | Graduate Center of CUNY | CUNY
© 2008 George John's Soft Materials Research Group.