An image scanning device employing a two-dimensional linear sensor including multiple linear sensors in parallel or arrays of photodetectors is disclosed. The sensors include radially projecting blades that deflect and actuate in response to the downward flow of material being discharged. The amount of the hallow nanoparticles in the composite material is 1-20 wt. The grasper mechanism is on the distal end of an elongated flexible body, and is operated with a handle located on the proximal end of the flexible body.