(624d) Investigation of Palladium Sorption On the Hydroxyl, Sulfhydryl, and Amine Functionality to Improve the Palladium Deposition On the Genetically Engineered Tobacco Mosaic Virus

Inorganic mineralization is used in metal/semiconductor coating on the biologically driven templates. With the aid of genetic engineering, the structure of the biotemplate or the surface functionality is potentially designable to prepare nanostructured inorganics for nano devices. The tobacco mosaic virus (TMV) has served as a model template to synthesize metal nanorods utilizing its unique tubular rod-shape (4 nm/18 nm of inner/external diameter with 300 nm longitudinal length). Also, the genetic engineering of TMV is well developed to modify it with active surface functionalities such as sulfhydry groups. There have been reports of biotemplated metal nanowires with gold, silver, palladium, and platinum with various biotemplates including TMV. However, further progresses of biotemplated metal nanowire synthesis are limited by few experimental observations elucidating the precursor interaction with the template surface.

The binding of pd(II) ion on the different functional groups on genetically modified tobacco mosaic virus (TMV1Cys) is studied through pd(II) sorption on the silica nanoparticles functionalized with hydroxyl, sulfhydryl, and amine surface groups. Pd(II) uptake/desorption on the surface functionalized silica is measured and the resulting Pd(II) staining on the functionalized silica will be further characterized with X-ray photoelectron spectrometer (XPS) and transmission electron microscopy (TEM).