▎ 摘　　要

NOVELTY - The method involves using detector (7) to detect the position of sample by a position signal from scanning unit (9). The sample position image is sent to a computer (10) through computer image generator (8). The working parameter for a graphene ion bombardment, such as bombardment time, gallium ion source heating parameter, ion flow sample surface ion bombardment area are considered to lower the effect of deflection of external electric field. USE - Gallium ion bombardment method for doping modified graphene. ADVANTAGE - The graphene electrical characteristics and intrinsic graphene two-dimensional structure are maintained, while selection of ion bombardment area is made accurately. DESCRIPTION OF DRAWING(S) - The drawing shows an explanatory view illustrating the process for performing bombardment of gallium ion. Gallium ion source (1) Lens system (3) Deflection system (4) Sample table (6) Detector (7) Computer image generator (8) Scanning unit (9) Computer (10)