▎ 摘　　要

NOVELTY - Dispersion or coating of turbostratic graphene comprises 1-100 layers of tubrostratic graphene. USE - The dispersion or coating of turbostratic graphene is used in super capacitors and strain sensors (claimed) and electronic circuits. ADVANTAGE - The dispersion is directly exfoliated by solution-mediated sonication without requiring additional intercalation and oxidation process. The turbostratic graphene is highly defect-free and exhibits excellent electronic conductivity. The graphene sheet can also be exfoliated using an elastomer stamp to have large area few-layer graphene on a solid substrate. The turbostratic graphene sheet has high purity and can be adopted in a facile manner in various electronic devices. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of the dispersion of turbostratic graphene involving (a) preparing turbostratic graphene by heating a hydrocarbon on a metal, (b) etching the metal by aqueous ferric chloride solution and (c) scooping the turbostratic graphene, washing, heating and transferring to a solvent to obtain turbostratic graphene dispersion; (2) preparation of a coating of turbostratic graphene on a substrate involving (i) preparing turbostratic graphene by heating a hydrocarbon on a metal, (ii) transferring the turbostratic graphene to adhere on to polydimethylsiloxane, (iii) contacting the turbostratic graphene adhered polydimethylsiloxane to the substrate and (iv) soaking in a solvent to obtain a coating; (3) a super capacitor comprising the turbostratic graphene dispersion or coating, where specific capacitance is 0.01-10 mF/cm2 with time constant of 40-60 microseconds and capacitance linearity is 100-1000 V/second; and (4) a strain sensor comprising the turbostratic graphene dispersion or coating, where strain gauge factor is 0.1-106 in a strain of 50-100% with response time of 1-3 ms.