A Bioinspired Ultra Flexible Artificial van der Waals 2D-MoS Channel/LiSiO Solid Electrolyte Synapse Arrays via Laser-Lift Off Process for Wearable Adaptive Neuromorphic Computing.

Wearable electronic devices with next-generation biocompatible, mechanical, ultraflexible, and portable sensors are a fast-growing technology. Hardware systems enabling artificial neural networks while consuming low power and processing massive in situ personal data are essential for adaptive wearable neuromorphic edging computing. Herein, the development of an ultraflexible artificial-synaptic array device with concrete-mechanical cyclic endurance consisting of a novel heterostructure with an all-solid-state 2D MoS channel and LiSiO (lithium silicate) is demonstrated.

Robust 2D MoS Artificial Synapse Device Based on a Lithium Silicate Solid Electrolyte for High-Precision Analogue Neuromorphic Computing.

High-precision artificial synaptic devices compatible with existing CMOS technology are essential for realizing robust neuromorphic hardware systems with reliable parallel analogue computation beyond the von Neumann serial digital computing architecture. However, critical issues related to reliability and variability, such as nonlinearity and asymmetric weight updates, have been great challenges in the implementation of artificial synaptic devices in practical neuromorphic hardware systems. Herein, a robust three-terminal two-dimensional (2D) MoS artificial synaptic device combined with a lithium silicate (LSO) solid-state electrolyte thin film is proposed.

Colloidal Synthesis of MoSe/WSe Heterostructure Nanoflowers via Two-Step Growth.

The ability to control the active edge sites of transition metal dichalcogenides (TMDs) is crucial for modulating their chemical activity for various electrochemical applications, including hydrogen evolution reactions. In this study, we demonstrate a colloidal synthetic method to prepare core-shell-like heterostructures composed of MoSe and WSe via a two-step sequential growth. By overgrowing WSe on the surface of preexisting MoSe nanosheet edges, MoSe-core/WSe-shell heterostructures were successfully obtained.

Orientation-Dependent Conversion of VLS-Grown Lead Iodide Nanowires into Organic-Inorganic Hybrid Perovskites.

In this study, we demonstrate Sn-assisted vapor-liquid-solid (VLS) growth of lead iodide (PbI) nanowires with van der Waals layered crystal structure and subsequent vapor-phase conversion into methylammonium lead iodide (CHNHPbI) perovskites. Our systematic microscopic investigations confirmed that the VLS-grown PbI nanowires display two major growth orientations of [0001] and [1¯21¯0], corresponding to the stacking configurations of PbI layers to the nanowire axis (transverse for [0001] vs. parallel for [1¯21¯0]).

Inherent Resistance of Seed-Mediated Grown MoSe Monolayers to Defect Formation.

Recent progress in the chemical vapor deposition technique toward growing large-area and single-crystalline two-dimensional (2D) transition metal dichalcogenides (TMDs) has resulted in an electronic/optoelectronic device performance that rivals that of their top-down counterparts, despite the extensive use of hydrogen, a common reducing agent that readily generates defects in TMDs. Herein, we report that 2D MoSe domains containing oxide seeds are resistant to hydrogen-induced defect generation. Specifically, we observed that the etching of the edges of seed-containing MoSe was significantly less than that of pristine MoSe, without apparent seed particles, under the same H annealing conditions.

Hydrogen-assisted step-edge nucleation of MoSe monolayers on sapphire substrates.

The fabrication of large-area single crystalline monolayer transition metal dichalcogenides (TMDs) is essential for a range of electric and optoelectronic applications. Chemical vapor deposition (CVD) is a promising method to achieve this goal by employing orientation control or alignment along the crystalline lattice of the substrate such as sapphire. On the other hand, a fundamental understanding of the aligned-growth mechanism of TMDs is limited.

Effects of Preoperative Dehydration on Postoperative Nausea and Vomiting in Gynecological Surgery Patients.

Purpose: The purpose of this study was to investigate the effect of dehydration from preoperative fasting on postoperative nausea and vomiting in patients who underwent gynecologic surgeries.

Methods: Study design was a prospective descriptive study. A total of 75 patients in a university hospital were selected.