Biomemristic Behavior for Water-Soluble Chitosan Blended with Graphene Quantum Dot Nanocomposite.

Lei Li

doi:10.3390/nano10030559

Abstract

Bionanocomposite has promising biomemristic behaviors for data storage inspired by a natural biomaterial matrix. Carboxylated chitosan (CCS), a water-soluble derivative of chitosan avoiding the acidic salt removal, has better biodegradability and bioactivity, and is able to absorb graphene quantum dots (GQDs) employed as charge-trapping centers. In this investigation, biomemristic devices based on water-soluble CCS:GQDs nanocomposites were successfully achieved with the aid of the spin-casting method. The promotion of binary biomemristic behaviors for Ni/CCS:GQDs/indium-tin-oxide (ITO) was evaluated for distinct weight ratios of the chemical components. Fourier transform infrared spectroscopy, Raman spectroscopy (temperature dependence), thermogravimetric analyses and scanning electron microscopy were performed to assess the nature of the CCS:GQDs nanocomposites. The fitting curves on the experimental data further confirmed that the conduction mechanism might be attributed to charge trapping–detrapping in the CCS:GQDs nanocomposite film. Advances in water-soluble CCS-based electronic devices would open new avenues in the biocompatibility and integration of high-performance biointegrated electronics.

Highlights

Memristic devices, beneficial to high density, large scalability, low power consumption, high endurance and retention performance, have emerged as promising candidates for future high-performance nonvolatile data memory [1,2,3]
Acidic salts are generated during the solution-processable method which must be removed in the following experiment
This paper aims at providing a novel biomemristic device using Ni/carboxylated chitosan (CCS):Graphene quantum dots (GQDs)/indium-tin-oxide (ITO), in which CCS:GQDs nanocomposites serve as passive components; ITO and Ni are used as top and bottom electrodes, respectively

Summary

Introduction

Beneficial to high density, large scalability, low power consumption, high endurance and retention performance, have emerged as promising candidates for future high-performance nonvolatile data memory [1,2,3] They possess a capacitor-like two-terminal metal-insulator-metal (MIM) configuration, where an insulating material is sandwiched between two conductive electrodes. Natural biomaterials offer remarkable building blocks for exploitation in next-generation biosustainable electronics, such as in organic thin-film transistors [4], organic displays and light-emitting devices [5,6], and organic photovoltaics [7] They provide these devices with environmental benignity, high performance and large-scale fabrication capability at low cost. A method blending inorganic nanoparticles into natural biomaterials has opened up a new way to create biomemristic materials

Objectives

Methods

Results

Conclusion