A method of preparing a graphene nanoplate (GNP), comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding between the expanded graphite by a gas-phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 2-5 canceled

canceled

canceled

canceled

A graphene nanoplate prepared by a method comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding the expanded graphite by a gas- phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, K. Chang e t al. U.S. Serial No. 14/144,134 Page 3 of 7 grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 8-9 canceled

canceled

A method of preparing a graphene nanoplate (GNP), comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding between the expanded graphite by a gas-phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 2-5 canceled

canceled

canceled

canceled

A graphene nanoplate prepared by a method comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding the expanded graphite by a gas- phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, K. Chang e t al. U.S. Serial No. 14/144,134 Page 3 of 7 grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 8-9 canceled

canceled

A method of preparing a graphene nanoplate (GNP), comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding between the expanded graphite by a gas-phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 2-5 canceled

canceled

canceled

canceled

A graphene nanoplate prepared by a method comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding the expanded graphite by a gas- phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, K. Chang e t al. U.S. Serial No. 14/144,134 Page 3 of 7 grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 8-9 canceled

canceled

A method of preparing a graphene nanoplate (GNP), comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding between the expanded graphite by a gas-phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 2-5 canceled

canceled

canceled

canceled

A graphene nanoplate prepared by a method comprising: preparing expanded graphite (EG); and exfoliating, grinding, or cracking the EG by colliding the expanded graphite by a gas- phase high speed to crack the EG induced by gas-phase-collision, wherein the exfoliating, grinding, or cracking the expanded graphite by gas-phase high speed collision is performed using a turbulence-inducing method including: transferring the expanded graphite into a chamber equipped with a sample inlet and a rotator at a lower part of the chamber, and spinning the rotator to induce turbulence into the chamber, and exfoliating, K. Chang e t al. U.S. Serial No. 14/144,134 Page 3 of 7 grinding, or cracking the expanded graphite by the induced turbulence, and wherein the gas-phase high speed collision is performed by inducing the expanded graphite to collision at the gas-phase high speed of about 0.5 x 10 2 to about 10 x 10 2 m/s.

Claims 8-9 canceled

canceled