Harnessing nitrogen-doped graphene quantum dots for enhancing the fluorescence and conductivity of the starch-based film

作者：Liu, Chenxi; Wen, Mengying; Mai, Shihua; Ma, Yue; Duan, Qingfei; Bao, Xianyang; Zou, Wei^*; Liu, Hongsheng^*

来源：Carbohydrate Polymers, 2023, 303: 120475.

DOI：10.1016/j.carbpol.2022.120475

• Starch-based film
• N-rGO-QDs
• Fluorescence
• Conductivity
• Flexibility

The flexible film is widely applied in the modern electronic industry, whilst it is still challenging to use biopolymer substrates (e.g., starch) to prepare flexible film well-performed in conductivity and fluorescence. In the study, a novel conductive, fluorescent, and flexible biopolymer film was prepared via a cost-effective method by fabricating the nitrogen-doped oxide-reduced graphene quantum dots (N-rGO-QDs) into the thermoplastic starch (TPS) substrate. TPS/N-rGO-QDs film with 10 wt% N-rGO-QDs showed the desirable lowest resistivity (0.082 omega.m), acceptable light transmittance (60-80 %), and durable fluorescence intensity (9000 CPS). The results reveal a novel starch-based multifunctional film with satisfactory electrical and fluorescent performances, which is hypothesized potential to be applied in some frontier domains, like human wearable devices.