▎ 摘　　要

NOVELTY - The device has a graphene layer that is located on a substrate layer. A pair of metal electrodes with opposite positions is plated on the graphene layer. The metal electrodes are used as source and drain of bipolar junction transistor. A conductive graphene is formed between each pair of source electrodes and drain electrode. A graphene point electrode array is etched on conductive channels. The graphene point electrodes are arranged in an interval, and each pair of graphene points electrodes is etched with nano-scale gap. A gate is provided in graphene layers, and current between source electrode and drain electrode is controlled by adjusting input gate voltage to realize switch control. USE - Electrically controllable single-molecule switch device. ADVANTAGE - The single-molecule switch device is enabled to adjust the input gate voltage and to control current size between source electrode and drain electrode so as to realize the switch control. It realizes stable electric control, which is good for real integrated application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparation of controllable single-molecule switch device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the arrangement of electrically controllable single-molecule switch device. (Drawing includes non-English language text)