Abstract: A photosensing device with a photovoltage sensing mechanism, a graphene layer and a semiconductor layer. The graphene layer is sandwiched between the semiconductor layer and a substrate. The photovoltage sensing mechanism senses the photovoltage created by light impinging on the graphene-semiconductor heterojunction. The strength of the photovoltage is used to indicate the level of illumination of the impinging light.

Abstract: A photosensing device with a photovoltage sensing mechanism, a graphene layer and a semiconductor layer. The graphene layer is sandwiched between the semiconductor layer and a substrate. The photovoltage sensing mechanism senses the photovoltage created by light impinging on the graphene-semiconductor heterojunction. The strength of the photovoltage is used to indicate the level of illumination of the impinging light.

Abstract: A photosensing device with a photovoltage sensing mechanism, a graphene layer and a semiconductor layer. The graphene layer is sandwiched between the semiconductor layer and a substrate. The photovoltage sensing mechanism senses the photovoltage created by light impinging on the graphene-semiconductor heterojunction. The strength of the photovoltage is used to indicate the level of illumination of the impinging light.

Abstract: An energy efficient apparatus and method for the continuous heat treatment of a carpet yarn or the like is disclosed, and which includes a conveyor extending through a heat treatment chamber, and with the conveyor comprising a number of endless belts which are adapted to support the yarn in downwardly hanging relaxed helically arranged loops. The lower portions of the loops are supportingly lifted during movement through each of the entrance and exit openings of the chamber, which permits the dimensions of the openings in the chamber to be minimized and thereby reduce heat loss therethrough.

Abstract: A method and apparatus for the continuous heat treatment of a carpet yarn or the like is disclosed, and wherein the yarn is advanced in loop form through a heat treatment chamber and then along a downstream accumulation zone. A control system is provided for insuring that all portions of the yarn remain in the heat treatment chamber for a predetermined residence time, and such that all portions of the yarn will possess uniform properties and appearance in a finished carpet. The control system continuously monitors the number of loops of yarn in the apparatus, and in the event that the number of loops either exceeds a predetermined maximum or is less than a predetermined minimum, a yarn severing mechanism located upstream of the heating chamber is actuated. By appropriate selection of the maximum and minimum numbers, all of the yarn downstream of the severing mechanism will be able to pass through the heating chamber in the predetermined residence time, and thus no off-standard yarn will be produced.