Enhanced Sensitivity in Photovoltaic 2D MoS/Te Heterojunction VOC Sensors.

Volatile organic compound (VOC) sensors have a broad range of applications including healthcare monitoring, product quality control, and air quality management. However, many such applications are demanding, requiring sensors with high sensitivity and selectivity. 2D materials are extensively used in many VOC sensing devices due to their large surface-to-volume ratio and fascinating electronic properties.

Pseudocapacitance-Induced Synaptic Plasticity of Tribo-Phototronic Effect Between Ionic Liquid and 2D MoS.

Contact-induced electrification, commonly referred to as triboelectrification, is the subject of extensive investigation at liquid-solid interfaces due to its wide range of applications in electrochemistry, energy harvesting, and sensors. This study examines the triboelectric between an ionic liquid and 2D MoS under light illumination. Notably, when a liquid droplet slides across the MoS surface, an increase in the generated current and voltage is observed in the forward direction, while a decrease is observed in the reverse direction.

Multilayer WSe/ZnO heterojunctions for self-powered, broadband, and high-speed photodetectors.

Self-powered broadband photodetectors have attracted great interest due to their applications in biomedical imaging, integrated circuits, wireless communication systems, and optical switches. Recently, significant research is being carried out to develop high-performance self-powered photodetectors based on thin 2D materials and their heterostructures due to their unique optoelectronic properties. Herein, a vertical heterostructure based on p-type 2D WSeand n-type thin film ZnO is realized for photodetectors with a broadband response in the wavelength range of 300-850 nm.

Unique Photoactivated Time-Resolved Response in 2D GeS for Selective Detection of Volatile Organic Compounds.

Volatile organic compounds (VOCs) sensors have a broad range of applications including healthcare, process control, and air quality analysis. There are a variety of techniques for detecting VOCs such as optical, acoustic, electrochemical, and chemiresistive sensors. However, existing commercial VOC detectors have drawbacks such as high cost, large size, or lack of selectivity.

Self-Powered, Broadband Photodetector Based on Two-Dimensional Tellurium-Silicon Heterojunction.

As a new class of two-dimensional (2D) materials and a group-VI chalcogen, tellurium (Te) has emerged as a p-type semiconductor with high carrier mobility. Potential applications include high-speed opto-electronic devices for communication. One method to enhance the performance of 2D material-based photodetectors is by integration with a IV group of semiconductors such as silicon (Si).

Ultrasensitive rapid cytokine sensors based on asymmetric geometry two-dimensional MoS diodes.

The elevation of cytokine levels in body fluids has been associated with numerous health conditions. The detection of these cytokine biomarkers at low concentrations may help clinicians diagnose diseases at an early stage. Here, we report an asymmetric geometry MoS diode-based biosensor for rapid, label-free, highly sensitive, and specific detection of tumor necrosis factor-α (TNF-α), a proinflammatory cytokine.

Free-Standing Multilayer Molybdenum Disulfide Memristor for Brain-Inspired Neuromorphic Applications.

Recently, atomically thin two-dimensional (2D) transition-metal dichalcogenides (TMDs) have attracted great interest in electronic and opto-electronic devices for high-integration-density applications such as data storage due to their small vertical dimension and high data storage capability. Here, we report a memristor based on free-standing multilayer molybdenum disulfide (MoS) with a high current on/off ratio of ∼10 and a stable retention for at least 3000 s. Through light modulation of the carrier density in the suspended MoS channel, the on/off ratio can be further increased to ∼10.

SnO@a-Si core-shell nanowires on free-standing CNT paper as a thin and flexible Li-ion battery anode with high areal capacity.

Here, we report 3D hierarchical SnO nanowire (NW) core-amorphous silicon shell on free-standing carbon nanotube paper (SnO@a-Si/CNT paper) as an effective anode for flexible lithium-ion battery (LIB) application. This binder-free electrode exhibits a high initial discharge capacity of 3020 mAh g with a large reversible charge capacity of 1250 mAh g at a current density of 250 mA g. Compared to other SnO NW or its core-shell nanostructured anodes, the fabricated SnO@a-Si/CNT structure demonstrates an outstanding performance with high mass loading (∼5.