▎ 摘　　要

NOVELTY - Purifying graphene nanoribbons, comprises: contacting a composition comprising graphene nanoribbons GNR1 and one or more contaminants with a liquid medium comprising a dispersant, and dispersing the graphene nanoribbons GNR1 in the liquid medium to obtain a liquid dispersion of the graphene nanoribbons GNR1; subjecting the liquid dispersion of the graphene nanoribbons GNR1 to a separation treatment to at least partly remove the one or more contaminants. USE - The process is useful for purifying graphene nanoribbons, which are useful for the preparation of devices, including electronic, optical or optoelectronic device (all claimed), e.g. field effect transistors, photovoltaic devices, sensor devices or light-emitting devices. ADVANTAGE - The process allows effective and easy purification of the graphene nanoribbons, which can be deposited on a substrate in a controlled and well-defined manner. The purified graphene nanoribbons exhibit very high structural uniformity and excellent control of the electronic properties. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a liquid dispersion of purified graphene nanoribbons, obtainable by the above process; (2) a process for depositing the graphene nanoribbons, comprising providing the liquid dispersion of purified graphene nanoribbons GNR1, and depositing the purified graphene nanoribbons GNR1 on a substrate; and (3) a device obtainable by the process.