Aqueous Exfoliation of Graphite into Graphene Assisted by Sulfonyl Graphene Quantum Dots for Photonic Crystal Applications

作者：Zeng Minxiang; Shah Smit A; Huang Dali; Parviz Dorsa; Yu Yi Hsien; Wang Xuezhen; Green Micah J^*; Chene Zhengdong^*

来源：ACS Applied Materials & Interfaces, 2017, 9(36): 30797-30804.

DOI：10.1021/acsami.7b06980

• polyaromatic hydrocarbons
• graphene quantum dots
• surface chemistry
• graphene exfoliation
• photonic crystal

We investigate the pi-pi stacking of polyaromatic hydrocarbons (PAHs) with graphene surfaces, showing that such interactions are general across a wide range of PAH sizes and species, including graphene quantum dots. We synthesized a series of graphene quantum dots with sulfonyl, amino, and carboxylic functional groups and employed them to exfoliate and disperse pristine graphene in water. We observed that sulfonyl-functionalized graphene quantum dots were able to stabilize the highest concentration of graphene in comparison to other functional groups; this is consistent with prior findings by pyrene. The graphene nanosheets prepared showed excellent colloidal stability, indicating great potential for applications in "electronics, solar cells, and photonic displays which was demonstrated in this work.

• 出版日期2017-9-13