Directly to

 

In this project we use tobacco mosaic viruses (TMV) as template in bio-inspired mineralization processes to produce bio/inorganic hybrid semiconductive layers with transistor properties. We will extend the successfully commenced work of the first funding period on establishing biomineralization processes for inorganic oxides to mineralization of metal-doped nanomaterials. The precise goal is here an extended understanding on the influence of the TMV surface charge distribution on the mineralization process and the resulting transistor properties. Additionally to TMV particles showing an equally distribution of charges on the surface TMV particles with asymmetric domains, so called Janus particles will yield information on the influence of different surface charge distributions. Next to the already established convective assembly process for homogeneous and dense monolayers of the viruses additional alignment methods like microcontact printing and dielectrophoresis will be developed. For characterization of the as produced materials atomic force- and scanning electron microscopy, transmission electron microscopy and X-ray diffraction will be applied. To study the charge distribution on TMV as well as on the TMV/metal oxide hybrids as new methodology Kelvin probe force microscopy will be established. The micellar self-organization of the Janus-type virus-like particles will be studied additionally after fluorescent labelling using fluorescent correlation spectroscopy. In depth information on the mineralization process in the early stages are expected to be gained by quartz crystal microbalance measurements, photoluminescence and the method of analytical ultracentrifugation.