Abstract: A method of forming at least one quantum dot on a predetermined area of a substrate includes forming a nucleation site having at least one surface or subsurface defect at the predetermined area of the substrate by implantation with ions, and growing a quantum dot on the nucleation site.

Abstract: A multi-purpose patient support and transport apparatus is provided which includes a Trendelenburg mechanism and a novel guard rail assembly. The Trendelenburg mechanism is actuated by turning a handle in one direction. This allows a penumatic spring connected between the seat and backrest assemblies to be fully contracted, thereby moving the backrest assembly to a Trendelenburg position. When the handle is turned in the opposite direction, the backrest may also be rotated downwardly, but is precluded from moving beyond the reclining position by a stop member which prevents the pneumatic spring shaft from moving entirely within the spring casing. The guard rail is mounted to the frame of the apparatus by a pair of pivot arms extending at an oblique angle with respect to the plane of the rail. This allows the rail to be stored under the frame when in the lowered position.

Abstract: A stretcher is provided which is usable for ophthalmic surgery and other similar operations. It includes a pivotably mounted backrest assembly and a headrest which is pivotably mounted to the backrest assembly. The headrest is substantially narrower in width than the remainder of the stretcher to provide easier access to a patient's head. A receptacle including a locking mechanism is centrally positioned beneath the headrest. It includes a passage which receives the mounting member of a wrist rest assembly or a headrest extension assembly. The headrest extension assembly is mounted to the headrest for providing a full width surface area for the patient's head.

Abstract: A multi-purpose patient support and transport apparatus is provided which includes a Trendelenburg mechanism and a novel guard rail assembly. The Trendelenburg mechanism is actuated by turning a handle in one direction. This allows a pneumatic spring connected between the seat and backrest assemblies to be fully contracted, thereby moving the backrest assembly to a Trendelenburg position. When the handle is turned in the opposite direction, the backrest may also be rotated downwardly, but is precluded from moving beyond the reclining position by a stop member which prevents the pneumatic spring shaft from moving entirely within the spring casing. The guard rail is mounted to the frame of the apparatus by a pair of pivot arms extending at an oblique angle with respect to the plane of the rail. This allows the rail to be stored under the frame when in the lowered position.