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

Chenxi Liu; Mengying Wen; Shihua Mai; Yue Ma; Qingfei Duan; Xianyang Bao; Wei Zou; Hongsheng Liu

doi:10.1016/j.carbpol.2022.120475

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

Carbohydr Polym. 2023 Mar 1:303:120475. doi: 10.1016/j.carbpol.2022.120475. Epub 2022 Dec 18.

Authors

Chenxi Liu¹, Mengying Wen¹, Shihua Mai¹, Yue Ma¹, Qingfei Duan¹, Xianyang Bao², Wei Zou³, Hongsheng Liu⁴

Affiliations

¹ School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
² School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
³ School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Jiashili Group Limited, Jiangmen 529300, China. Electronic address: Wei.zou@uq.net.au.
⁴ School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Sino-Singapore International Joint Research Institute, Knowledge City, Guangzhou 510663, China. Electronic address: liuhongsheng@scut.edu.cn.

PMID: 36657854
DOI: 10.1016/j.carbpol.2022.120475

Abstract

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 Ω·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.

Keywords: Conductivity; Flexibility; Fluorescence; N-rGO-QDs; Starch-based film.