NOVELTY - The device has a substrate (702) including an active material of nanosized particles deposited on a surface (706) of the substrate. The active material includes an edge formed at a position determined by a transition (720) from a plane to a trench (714), where a shaped surface geometry controls an orientation of the nanosized particles and density distribution of the nanosized particles. The trench is part of a set of trenches that is spaced at 100 nanometers to 1 micrometer apart from one another on the surface. Multiple pillars protrude out of the surface of the substrate.    USE - Responsive device for use in a system e.g. photonic system, capacitive system, and inductor system. Uses include but are not limited to active display matrix, passive display matrix, computer, laptop, desktop, electronic tablet, phone, watch, automobile, airplane, sensor, global positioning unit, satellite, instrumentation, circuit board, display monitor, appliance and solar cell.    ADVANTAGE - The device allows nanosized particles droplet's edge to be formed within two micrometers of the trench, where the edge of the droplet stops at the trench's transition as the droplet's edge is pinned to the trench's transition as the edge advances, and the droplet's surface tension holds back the remainder of the droplet from moving away from the pinned edge of the droplet such that the droplet's edge conforms to the shapes defined by the trenches, thus controlling the overall shape formed by the droplet, and precisely controlling the way of the droplets with nanosized particles in an efficient manner.    DETAILED DESCRIPTION - The nanosized particles are selected from a group consisting of electrically conductive particles, optically responsive particles, and electrically responsive particles. The active material is selected from a group consisting of electrically conductive material, optically responsive material, and electrically responsive material. An INDEPENDENT CLAIM is also included for a method for forming a responsive device.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating responsive device manufacturing process.    Substrate (702)    Substrate surface (706)    Light source (710)    Trench (714)    Transition (720)