▎ 摘　　要

NOVELTY - Etching graphene nanostructure involves providing a piece of highly oriented pyrolytic graphite which includes a first window, a second window, and a third window, where first window and second window includes one or more electrode contacts configured to received an electrical voltage, where portion of third window includes a reaction area is configured to received a deoxyribonucleic acid sample, depositing deoxyribonucleic acid sample on piece of highly oriented pyrolytic graphite, where deoxyribonucleic acid sample comprises double-stranded deoxyribonucleic acid or single-stranded deoxyribonucleic acid, placing piece of highly oriented pyrolytic graphite in a humidity controlled chamber, applying a relative humidity to piece of highly oriented pyrolytic graphite, and applying electrical voltage across first window and second window, and etching a surface of highly oriented pyrolytic graphite. USE - Method for etching graphene nanostructure.