Fabrication and self assembly of nano-heterostructures

We discuss about the covalent attachment of quantum dots with amine terminal groups (QD-NH2) to the ends of oxidized multi-walled Carbon Nanotube (MWCNTs) for nanodevices. We synthesized QDs with terminal carboxylic acid groups (QD-COOH) and covalently attached with a plant adhesion protein (SCA) for the localization study of the protein SCA on the live pollen tube of lily. We localized the protein and unveiled new sciences regarding the endocytosis of the protein SCA that we did not be observe using classical antibody labeling techniques.; We explore the electrostatic coordination affinity (ECA) between the Zn atoms and the oxygen of the carboxylic acids groups on the carbon nanotube (CNTs) to form ZnO-CNT heterostructures both in aqueous and vapor phase. With SWCNTs ZnO hollow spheres are formed and we show that SWCNTs perform dual functions, as templates for growth and as scaffolds providing structural intactness to the hollow ZnO spheres (20 nm wall thickness). We also report the possibility of using oxidized SWCNT as templates for the growth of vertical ZnO nanowires. Apart from the hollow spheres, we also discuss some interesting fundamental research on forming ZnO heterostructures with gold and CdTe nanowires.; We discuss the development of a novel technique which we call 'Nano Patterned Liquid Electrode' (NaPLE) technique for the electrochemical (ED) fabrication of nanowires and nanotubes of materials sensitive to acids and bases. We fabricated Prussian blue nanotubes via NaPLE wherein a liquid metal surface is nano patterned with a porous polycarbonate membrane (PCM; used as a hard mask). Nano patterning of a liquid metal (Hg that functions as a topside metal contact) with PCM instead of porous alumina membrane eliminates the use of both strong acid and base during the isolation of the freestanding nanowires. We also demonstrate the use of this technique to fabricate gold nanowires. Apart from CVD, and ED we fabricated for the first time metallo organic nanotubes (Rhodium-carbene-metal complexes) using a simple technique of wetting porous templates.