Nineteen men pose with a 6-foot, 8-inch diameter tree trunk (on which leans a saw) and two sections of the tree, one of which has been loaded onto a cart led by two horses. There is a white splotch in the lower left-hand corner of the photograph,...
Optical properties of carbon nanotubes have recently attracted considerable amount of attention. Due to there direct band gap material characteristic these and dimension of the order of nano meters they find potential applications in the field of...