TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The tuning step comprises tuning the pulse of the laser shot to have 2 fs of the full width at a half-maximum of the pulse, a wavelength of the laser to be 800 nm and an average intensity of the electric field for 4 fs of the full width time range to be negative with respect to a normal axis of the graphene layer, or tuning the pulse of the laser shot to have 2 fs of the full width at the half-maximum of the pulse, a wavelength of the laser to be 800 nm, and an average intensity of the electric field for 4 fs of the full width time range to be positive with respect to a normal axis of the graphene layer. The step of tuning the average intensity to be negative comprises setting a first threshold that is positive and a second threshold that is negative and has a five time intensity of the first threshold, increasing the intensity of the field from zero to the first threshold in the time of 0-1 fs that is a first quarter of the full width at the half maximum of the pulse, decreasing the intensity of the field from the first threshold to the second threshold in the time of 1-2 fs that is a second quarter of the full width at the half maximum of the pulse, increasing the intensity of the field from the second threshold to the first threshold in the time of 2-3 fs that is a third quarter of the full width at the half maximum of the pulse, and decreasing the intensity of the field from the first threshold to zero in the time of 3-4 fs that is a fourth quarter of the full width at the half maximum of the pulse. The step of tuning the average intensity to be positive comprises setting a third threshold that is negative and a fourth threshold that is positive and has a five time absolute value of the third threshold, decreasing the intensity of the field from zero to the third threshold in the time of 0-1 fs that is a first quarter of the full width at the half maximum of the pulse, increasing the intensity of the field from the third threshold to the fourth threshold in the time of 1-2 fs that is a second quarter of the full width at the half maximum of the pulse, decreasing the intensity of the field from the fourth threshold to the third threshold in the time of 2-3 fs that is a third quarter of the full width at the half maximum of the pulse, and increasing the intensity of the field from the third threshold to zero in the time of 3-4 fs that is a fourth quarter of the full width at the half maximum of the pulse. The method further comprises tuning a maximum intensity of the electric field in the pulse shape to be 10-20 V/ Angstrom . The irradiation with the laser is performed, when the sheet material of graphene oxide is kept in a nitrogen gas or hydrogen gas environment. Preferred Components: The halogen atoms are chlorine atoms or fluorine atoms.