Publication

NMSL Lab

Publication

Metal-Amino Acid Nanofibers based Triboelectric Nanogenerator for Self-Powered Thioacetamide Sensor
Author
Gaurav Khandelwal, Meran Keshawa Ediriweera, Neeta Kumari, Nirmal Prashanth Maria Joseph Raj, Somi Kim Cho, Sang-Jae Kim
Journal
ACS APPLIED MATERIALS & INTERFACES
Page
18887–18896
Year
2021

Abstract

The biomolecules offer different metal-binding sites to form a coordination polymer with structural diversity. The coordination directed one-dimensional metal-biomolecule nanofibers (Cu-Asp NFs) designed using copper as metal ion and aspartate as a ligand for triboelectric nanogenerator (TENG) is reported here. The different characterization techniques reveal the detailed characteristics of the synthesized Cu-Asp NFs. The robust coating of the Cu-Asp NFs is achieved using a simple tape cast coater. The bending and water dipping studies suggest the stability of the coated material. The relative polarity test and Kelvin probe force microscopy (KPFM) reveal the position of Cu-Asp in the triboelectric series. The Cu-Asp NFs and Teflon are used as the active material for the fabrication of freestanding mode (NF-TENG) and contact-separation mode (cNF-TENG) TENG. The NF-TENG generates an output of 200 V and 6 μA. The simple ion deposition technique enhances the voltage, current, and transferred charge of cNF-TENG by 2.5, 8, and 3 times. The use of the material for the single electrode sliding mode device further confirms the coated material’s stability and robustness. A selective self-powered thioacetamide sensor is developed with the cNF-TENG, which exhibits a sensitivity of 0.76 v mM–1. Finally, NF-TENG is demonstrated for powering up numerous portable electronics.