46 research outputs found
Glass Transition Behavior of Polymer Films of Nanoscopic Dimensions
Glass transition behavior of nanoscopically thin polymer films is
investigated by means of molecular dynamics simulations. A thin polymer film
that is composed of bead-spring model chains and supported on an idealized, fcc
lattice substrate surface is studied in this work.Comment: in review, macromolecule
Completely resected follicular dendritic cell sarcoma of the posterior mediastinum: report of a case
One-Dimensional Nanostructures and Devices of II–V Group Semiconductors
The II–V group semiconductors, with narrow band gaps, are important materials with many applications in infrared detectors, lasers, solar cells, ultrasonic multipliers, and Hall generators. Since the first report on trumpet-like Zn3P2nanowires, one-dimensional (1-D) nanostructures of II–V group semiconductors have attracted great research attention recently because these special 1-D nanostructures may find applications in fabricating new electronic and optoelectronic nanoscale devices. This article covers the 1-D II–V semiconducting nanostructures that have been synthesized till now, focusing on nanotubes, nanowires, nanobelts, and special nanostructures like heterostructured nanowires. Novel electronic and optoelectronic devices built on 1-D II–V semiconducting nanostructures will also be discussed, which include metal–insulator-semiconductor field-effect transistors, metal-semiconductor field-effect transistors, andp–nheterojunction photodiode. We intent to provide the readers a brief account of these exciting research activities
Electronically induced modification of thin layers on surfaces
Interactions of thermally and electronically stimulated reactions in thin layers on surfaces are investigated.
For self-assembled monolayers, thermal activation promotes many processes primarily induced by
electronic excitations. We demonstrate that the film temperature is an important parameter for steering these
reactions towards different final products. Using chemisorbed water on Ru(001) as an example, we investigate
how the products of an irradiation induced reaction catalyze thermally stimulated dissociation of water
molecules
Parkinson's disease in North Karnataka An epidemiological perspective
Abstract: Parkinson's disease (PD) is a progressive disorder of the brain. It occurs when certain neurons in substantia nigr