CVD-grown single layer graphene on copper was transferred onto SiOx/Si or left on copper. The sample was placed in a N₂-flushed vessel with anhydrous liquid ammonia and lithium wire to hydrogenate graphene (Birch reduction). Reaction durations of 5-30 seconds gave partially hydrogenated graphene (pHG); 2 minutes gave fully hydrogenated graphene. The reaction was quenched with a nucleofuge donor (methanol, ethanol, or methyl iodide). The sample was immersed into 5% v/v ethanol in water, causing the hydrogenated graphene to delaminate and float freely. The floating graphene was picked up with a target substrate (glass, PVDF, polyethylene, aluminum foil, copper TEM grid) and dried under N2. Characterized by Raman spectroscopy, AFM, MFM, STEM, and optical microscopy.

Transferred hydrogenated graphene (HG) was annealed in a tube furnace at 300°C under a 1:9 v/v H₂/Ar gas mixture. This step removed hydrogen from the graphene surface, restoring pristine graphene.

Graphene was first functionalized with p-nitrobenzene diazonium sulfate, then reduced with lithium in liquid ammonia and delaminated/relaminated as described in Example 1. Properties characterized using Raman spectroscopy.

CVD-grown single layer graphene on copper was transferred onto SiOx/Si or left on copper. The sample was placed in a N₂-flushed vessel with anhydrous liquid ammonia and lithium wire to hydrogenate graphene (Birch reduction). Reaction durations of 5-30 seconds gave partially hydrogenated graphene (pHG); 2 minutes gave fully hydrogenated graphene. The reaction was quenched with a nucleofuge donor (methanol, ethanol, or methyl iodide). The sample was immersed into 5% v/v ethanol in water, causing the hydrogenated graphene to delaminate and float freely. The floating graphene was picked up with a target substrate (glass, PVDF, polyethylene, aluminum foil, copper TEM grid) and dried under N2. Characterized by Raman spectroscopy, AFM, MFM, STEM, and optical microscopy.

Transferred hydrogenated graphene (HG) was annealed in a tube furnace at 300°C under a 1:9 v/v H₂/Ar gas mixture. This step removed hydrogen from the graphene surface, restoring pristine graphene.

Graphene was first functionalized with p-nitrobenzene diazonium sulfate, then reduced with lithium in liquid ammonia and delaminated/relaminated as described in Example 1. Properties characterized using Raman spectroscopy.

CVD-grown single layer graphene on copper was transferred onto SiOx/Si or left on copper. The sample was placed in a N₂-flushed vessel with anhydrous liquid ammonia and lithium wire to hydrogenate graphene (Birch reduction). Reaction durations of 5-30 seconds gave partially hydrogenated graphene (pHG); 2 minutes gave fully hydrogenated graphene. The reaction was quenched with a nucleofuge donor (methanol, ethanol, or methyl iodide). The sample was immersed into 5% v/v ethanol in water, causing the hydrogenated graphene to delaminate and float freely. The floating graphene was picked up with a target substrate (glass, PVDF, polyethylene, aluminum foil, copper TEM grid) and dried under N2. Characterized by Raman spectroscopy, AFM, MFM, STEM, and optical microscopy.

Transferred hydrogenated graphene (HG) was annealed in a tube furnace at 300°C under a 1:9 v/v H₂/Ar gas mixture. This step removed hydrogen from the graphene surface, restoring pristine graphene.

Graphene was first functionalized with p-nitrobenzene diazonium sulfate, then reduced with lithium in liquid ammonia and delaminated/relaminated as described in Example 1. Properties characterized using Raman spectroscopy.

CVD-grown single layer graphene on copper was transferred onto SiOx/Si or left on copper. The sample was placed in a N₂-flushed vessel with anhydrous liquid ammonia and lithium wire to hydrogenate graphene (Birch reduction). Reaction durations of 5-30 seconds gave partially hydrogenated graphene (pHG); 2 minutes gave fully hydrogenated graphene. The reaction was quenched with a nucleofuge donor (methanol, ethanol, or methyl iodide). The sample was immersed into 5% v/v ethanol in water, causing the hydrogenated graphene to delaminate and float freely. The floating graphene was picked up with a target substrate (glass, PVDF, polyethylene, aluminum foil, copper TEM grid) and dried under N2. Characterized by Raman spectroscopy, AFM, MFM, STEM, and optical microscopy.

Transferred hydrogenated graphene (HG) was annealed in a tube furnace at 300°C under a 1:9 v/v H₂/Ar gas mixture. This step removed hydrogen from the graphene surface, restoring pristine graphene.

Graphene was first functionalized with p-nitrobenzene diazonium sulfate, then reduced with lithium in liquid ammonia and delaminated/relaminated as described in Example 1. Properties characterized using Raman spectroscopy.