▎ 摘 要
NOVELTY - CVD graphene dry transferring process comprises e.g. (1) preparing PVP (polyvinyl pyrrolidone) and PVA (polyvinyl alcohol) gel; where the preparation of PVP gel comprises taking PVP white powder, adding deionized water, adding NVP (normal-vinylpyrrolidone), finally adding absolute ethanol, manually stirring until completely dissolving, sealing, and storing to obtain PVP gel; where preparation of PVA gel comprises taking PVA white powder, adding deionized water, placing on magnetic stirrer, setting the temperature, stirring until completely dissolving, to obtain sticky gel, sealing and storing at room temperature to obtain PVA gel; (2) cutting the required size of graphene/copper foil, placing in sealed deionized water, heating water bath, taking out, spin-coating the PVP gel and PVA gel on graphene surface, and oven drying; (3) taking out the obtained PVA/PVP/graphene/copper foil, stripping the PVA/PVP/graphene film, transferring the peeled film to middle of two transparent slides. USE - The method is useful for CVD graphene dry transferring process. ADVANTAGE - The method: has less protective rubber residue, no heavy metal residue, less residual organic solvent, less time for transferring graphene, and high quality of transferred graphene; and is economical. DETAILED DESCRIPTION - CVD graphene dry transferring process comprises (1) preparing PVP (polyvinyl pyrrolidone) and PVA (polyvinyl alcohol) gel; where the preparation of PVP gel comprises taking 1 g PVP white powder, adding 1ml of deionized water, adding 2ml of NVP (normal-vinylpyrrolidone), finally adding absolute ethanol to 10 ml, manually stirring until completely dissolving, sealing, and storing at 0-4 degrees C to obtain PVP gel; where preparation of PVA gel comprises taking 1 g PVA white powder, adding 10 ml deionized water, placing on magnetic stirrer, setting the temperature to 80 degrees C, stirring for 1 hours until completely dissolving, to obtain sticky gel, sealing and storing at room temperature to obtain PVA gel; (2) cutting the required size of graphene/copper foil, placing in sealed deionized water, heating in 50 degrees C water bath for 3 hours, taking out, spin-coating the obtained PVP gel and PVA gel on the graphene surface, and oven drying; (3) taking out the obtained PVA/PVP/graphene/copper foil, stripping the PVA/PVP/graphene film, transferring the peeled film to middle of two transparent slides, preheating at 75 degrees C for 90 seconds on hot plate to allow the film to naturally stretch; (4) transferring the naturally stretched PVA/PVP/ graphene thin film of graphene into absolute ethanol at 50 degrees C for 5 seconds, taking out, adhering on cleaned substrate after naturally airing, where at this time, film and the substrate are firmly adhered; drying in oven at 110 degrees C for 10 minutes to obtain PVA/PVP/graphene/substrate; and (5) removing the PVA/PVP/graphene/substrate, placing in deionized water at 75 degrees C for 10-15 minutes, removing the PVA/PVP colloid, rinsing in deionized water for 5 times, placing in oven, and drying