No abstract

No abstract

Porous silicon (PS) fabrication, changes in the optical properties and surface modi¯cation in the oxidized PS (dipped into the Glucose oxide) due to the in¯ltration of biomolecules using Luminescence Spectrophotometer [Photoluminescence (PL)], Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscope (SEM) were studied. The surface morphology of oxidized PS (OPS) and treated with Glucose have been studied by SEM. Spontaneous imbibition weight was calculated theoretically using imbibition equation for the porous medium using glucose solution as the wetting liquid. FTIR analysis revealed that, the strong Si-H, Si-O-Si bonds which covered most of the OPS surface. In the glucose treated PS layer, the amide I (C¼O) stretch and amide II (C¼N) stretch (1690 cm À1 and 1551 cm À1 Þ groups were appeared in the spectrum which con¯rmed the coupling reaction. E±cient visible Photoluminescence was obtained at around 624 nm from glucose treated porous silicon. The functionalization of glucose with nano structured PS, changes light emission over the surface of OPS. It can be applied in optical biosensor and which can be used in biomedical applications.

The increasing legal and customer demands on passive safety of automobiles have to be fulfilled under the conditions of shortened development times and cost reductions. Today the design process of a bus with regard to its crashworthiness function is driven by a virtual development. A wide range of different applications has to be covered by simulation influencing the design of body-in-white, interior and exterior trim, chassis and power train. In recent days more emphasis has been given to Passenger bus rollover analysis and side impact but the study of frontal impact behaviour of the passenger bus is ignored. The finite element analysis is used for estimating the damage of the passenger bus due to the frontal crash. The vehicle model is allowed to frontal crash with rigid material. The deformation and displacement characteristics of the structure are analyzed at different speeds. Geometric modeling of the bus structure has been created by using CATIA cad package and discritized by ANSYS LS-Dyna. The numerical simulation is carried out for different velocities of bus structure. The results of displacement during collision are plotted on the graph. Some improvements were suggested in the body structure after analysing different types of crack initiators.

No abstract