1 9 decadiene

Isopentenyl diphosphate (IDP), dimethylallyl diphosphate (DMADP), geranyl diphosphate (GDP), farnesyl diphosphate (FDP), geranylgeranyl diphosphate (GGDP), 1,9-decadiene, ammonium bicarbonate, chlorogenic acid, formic acid, tert-butyl methyl ether (TBME), methanol and acetonitrile (LC-MS grade) were purchased from Sigma-Aldrich (St. Louis, MO, United States). Trimethylsulfonium hydroxide (TMSH) was ordered from Macherey-Nagel (Düren, Germany).

Polymer solutions for graphene transfer were prepared by dissolving polystyrene beads (average MW ~192K by Sigma Aldrich, St. Louis, MO, USA) in toluene solvent at 5 w.t%. 1-5 hexadiene, 1-7 octadiene and 1-9 decadiene (by Sigma Aldrich, St. Louis, MO, USA) were used as plasticizers for polystyrene. Polystyrene to plasticizer ratio in the solution was varied from 100% pure polystyrene to 80/20 ratio of polystyrene with plasticizer. The solution was stirred at 500 rpm for 3 h and filtered to remove any undissolved residue from the solution. PMMA solution (4 wt% 950K MW PMMA A4 in Anisole by MICROCHEM, Westborough, MA, USA) was used for PMMA assisted graphene transfer.