title: Ultraviolet and blue emitting graphene quantum dots synthesized from carbon nano-onions and their comparison for metal ion sensing.
abstract: Ultraviolet and blue emitting graphene quantum dots (GQDs) were synthesized by chemical oxidation of carbon nano-onions. TEM, AFM, XPS, and optical characterization techniques showed that different optical properties of UV- and blue-emitting GQDs originate from their unique structure and chemical functionalities. UV- and blue-emitting GQDs were also compared for heavy metal ion sensing.
authors.affiliation: Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA. dooyoung.kim@uky.edu.
authors.forename: Yiyang
authors.initials: Y
authors.lastname: Liu
authors.forename: Doo Young
authors.initials: DY
authors.lastname: Kim