title: RNA-Mediated CdS-Based Nanostructures.
abstract: The colloidal method provides an important tool to synthesize different nanostructures and their assemblies. The coating of colloidal inorganic nanostructures by the biotemplate of similar dimension not only provides them the thermodynamic stability but also imparts the chemical features to grow in different dimensionalities and capabilities for molecular recognition. In this chapter we describe detailed methodology for the synthesis and characterization of CdS nanoparticles templated by ribonucleic acid (RNA) derived from torula yeast. The binding of RNA passivates the surface of CdS nanostructures and controls their optical properties. The presence of excess Cd(2+) ions induces the folding and polarization in RNA-mediated CdS to enhance the supramolecular interactions among different building blocks. It produces CdS-based nanostructures of varied morphologies in the process of self-assembly. An interaction of the multi-functionalities of RNA with the excess Cd(2+)/Zn(2+) ions induces the spontaneous folding and polarization in RNA-mediated CdS/ZnS nanostructures and enhances the non-covalent bonding interactions among their building blocks. The self-organization in CdS/ZnS semiconducting nanosystem results in the production of novel tubular morphology.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India.
authors.forename: Vinit
authors.initials: V
authors.lastname: Kumar
authors.forename: Anil
authors.initials: A
authors.lastname: Kumar
mesh_terms: D002104:Cadmium / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D009690:Nucleic Acid Conformation; D012313:RNA / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D002104:Cadmium; D012313:RNA