Contents: (Small 18/2017)

In article number 1601001, Ling Huang, Wei Huang, and co-workers, report a temperature-controlled facile one-pot solvothermal method that allows selective synthesis of either pure graphene oxide, pure carbon dots, or pure graphene oxide quantum dots (GOQDs) using graphite as a starting material. The size of carbon dots (50-2.5 nm) can be precisely tuned by adjusting the reactants ratios. In addition, trace amount of Eu 3+ and Tb 3+ can be selectively distinguished by GOQDs.