▎ 摘　　要

NOVELTY - Preparing (M1) graphene nanoribbons involves providing several carbon nanotubes; and reacting the carbon nanotubes with at least one oxidant to form oxidized graphene nanoribbons; where at least one oxidant is operable to longitudinally open the carbon nanotubes. USE - For preparing oxidized graphene nanoribbons and reduced graphene nanoribbons (claimed). ADVANTAGE - The method provides low viscosity, high lubricity and high thermal stability of drilling fluids, and improves infection suppression, odor control and inhibit lipophilic toxins of wound dressings; and provides improved tolerance to explosive decompression of gaskets and seals. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparing (M2) oxidized graphene nanoribbons involving providing several multi-wall carbon nanotubes, and reacting the multi-wall carbon nanotubes with at least one oxidant in presence of at least one protective agent and/or at least one acid, where the oxidant is operable to longitudinally open the multi-wall carbon nanotubes; (2) preparing (M3) reduced graphene nanoribbons involving providing oxidized graphene nanoribbons; and reacting the oxidized graphene nanoribbons with at least one reducing agent; (3) shortened graphene nanoribbons, where the shortened graphene nanoribbons are selected from oxidized graphene nanoribbons and/or reduced graphene nanoribbons; and (4) a thin film comprising graphene nanoribbons, where the graphene nanoribbons are selected from oxidized graphene nanoribbons and/or reduced graphene nanoribbons.