High On/Off Ratio Carbon Quantum Dot–Chitosan Biomemristors with Coplanar Nanogap Electrodes

Abstract

A carbon-based natural nanocomposite material comprising carbon quantum dots (CQDs) is dispersed in a chitosan matrix. The CQD−chitosan nanocomposite serves as a solid polymer electrolyte layer of a biomemristor with a Au/CQD− chitosan/Al structure. The active layer of the CQD−chitosan nanocomposite is deposited from its solution on top of coplanar asymmetric nanogap (∼15 nm) Al−Au electrodes, patterned via adhesion lithography. The CQD−chitosan biomemristor presents a high on/off ratio (>10 6 ) and reproducible and reliable bipolar resistive switching behavior. An endurance of 160 cycles was recorded, while the high and low resistance states remained stable for more than 10 4 s. This study highlights the potential of both the CQD−chitosan material and nanogap electrode structures for application in nanoscale biocompatible memory devices.

A high-performance magnetoelectric non-volatile light-emitting memory device

“…The SET and RESET voltages vary from device-to-device and the respective statistical values are +(1.37 ± 0.34) V and −(1.88 ± 0.38) V. The current density ratio of the LRS to the HRS is greater than 10 3 , which is phenomenal for the performance of memory devices. 45 Moreover, the ON/OFF switching behavior of the ITO/PMMA/Ag RRAMs for 50 cycles is also shown in Fig. S1b (ESI†), with the ON/OFF ratio remaining at 10 3 .…”

Dissolvable Flexible Biomemristor Based on a Collagen Electrolyte and Mg Electrodes for Transient Electronics

“…Moreover, artificial neuromorphic computing as a multitasking system has emerged to facilitate AI advancement. On the other hand, among the developing memory technologies, the memristor has the merits of fast response time, low power consumption, − and high density, making it a reliable candidate for the next generation of nonvolatile memories …”

First‐Principles Study of the Electronic Properties of Egg Albumen Optoelectronic Artificial Synapses by Carbon Nanotube Insertion

“…[7][8][9] Memristors made of nontoxic, biocompatible, and degradable natural biomaterials are used in wearable, humancompatible, and environmentally friendly smart electronic devices. [10][11][12][13] As one of the common biological proteins, egg albumen (EA) does not require an additional extraction process compared to other proteins. Electronic devices made of it have strong durability and have been applied to one-writeread-many memory devices, [14] field effect transistors, [15] transistors, [16,17] and supercapacitors.…”

“…[ 7–9 ] Memristors made of nontoxic, biocompatible, and degradable natural biomaterials are used in wearable, human‐compatible, and environmentally friendly smart electronic devices. [ 10–13 ]…”