This issue's cover highlights the main low-dimensional carbon materials (for example graphene and carbon nanotubes), a longstanding favorite of the Center for Nanochemistry (CNC) at Peking University. In the past 20 years, the CNC team has produced numerous exciting achievements in the synthesis, characterization, properties, and applications of low-dimensional carbon materials. This special issue was organized as the commemorative gift to the CNC's 20th birthday.
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