Surface Modification of a Titanium Carbide MXene Memristor to Enhance Memory Window and Low‐Power Operation

Abstract

With the demand for low‐power‐operating artificial intelligence systems, bio‐inspired memristor devices exhibit potential in terms of high‐density memory functions and the emulation of the synaptic dynamics of the human brain. The 2D material MXene attracts considerable interest for use in resistive‐switching memory and artificial synapse devices owing to its excellent physicochemical properties in memristor devices. However, few memristive and synaptic MXene devices that display increased switching performances are reported, with no significant results. Herein, the conductivity of MXene (Ti3C2Tx) is engineered via etching and oxidation to enhance the switching performance of the device. The exceptional properties of partially oxidized MXene memristors include large memory windows and low threshold biases, and the complex spike‐timing‐dependent plasticity synaptic rules are also emulated. The low threshold potential distribution, reliable retention time (104 s), and distinct resistance states with a high ON–OFF ratio (>104) are the main memory‐related features of this device. The experimentally determined switching potentials of the optimized device are also uniformly distributed, according to a statistical probability‐based approach. This investigation may promote the essential material properties for use in high‐density non‐volatile memory storage and artificial synapse systems in the field of innovative nanoelectronic devices.

Scaling up the charge transfer on Pd@Ti3C2Tx–TiO2 catalysts: a sustainable approach for H2 generation via water splitting

“…The absence of agglomeration is due to the layered structure of Ti 3 C 2 T x that reduces the TiO 2 accumulations. 75 It has been noted that the intimate contact between TiO 2 (101) and Ti 3 C 2 T x facets in the photoreaction facilitates the transfer of photogenerated electrons to the active sites where the rate of water reduction is remarkably enhanced. Surprisingly, Pd nanoparticles located on Ti 3 C 2 T x remain un-oxidized ( i.e.…”

Electrical and Electrochemical Investigations on Copper Oxide-Based Monolayer and Bilayer Memristive Devices

“…The experimental EPSC data were well fitted to the exponential equation with the fitting factor of 0.9787 (Adj. R 2 ) and the time constant (τ) of 3.41 ms. Figure c shows the paired-pulse facilitation (PPF index %) property of the Ag/ZnO/Cu x O/FTO RS device, which can be calculated by taking the ratio of the second EPSC (A2) response to the first EPSC (A1) response. − The PPF index (%) is considered a short-term plasticity (STP) property of the human brain. It can be seen from Figure c that as the spike interval increased, the PPF index decreased, indicating the loss of temporal correlations between the two neurons.…”

Versatile Titanium Carbide MXene Thin-Film Memristors with Adaptive Learning Behavior

“…The high-resolution TEM (HR-TEM) image depicts the characteristic hexagonal symmetry of the lattice planes with an interplanar spacing (d) of 0.24 nm as shown in Figure 1h, which corresponds to the (111) plane of titanium carbide (TiC). 23 Then, the recorded SAED pattern shows the bright spots arranged in a hexagonal form in the reciprocal space. The d-spacing extracted from the SAED pattern is also found to be about 0.24 nm for the (111) lattice plane of TiC in Ti 3 C 2 T x NF samples.…”