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Two-dimensional (2D) molybdenum disulfide (MoS2) nanosheets have attracted attention as a promising and cost-effective alternative catalyst for the hydrogen evolution reaction (HER). However, their aggregation and poor conductivity limit…

The ability to synthesize high-quality samples over large areas and at low cost is one of the biggest challenges during the developmental stage of any novel material. While chemical vapor deposition (CVD) methods provide a promising…

Electric and thermoelectric properties of strictly monolayer MoS$_2$ films, which are grown using a novel micro-cavity based CVD growth technique, have been studied under diverse environmental and annealing conditions. Resistance of a…

Mesoscale and Nanoscale Physics · Physics 2020-09-16 Swarup Deb , Pritam Bhattacharyya , Poulab Chakrabarti , Himadri Chakraborti , Kantimay Das Gupta , Alok Shukla , Subhabrata Dhar

Led by the rise of the internet of things, the world is experiencing exponential growth of generated data. Data-driven algorithms such as signal processing and artificial neural networks are required to process and extract meaningful…

Mesoscale and Nanoscale Physics · Physics 2024-01-24 Guilherme Migliato Marega , Hyun Goo Ji , Zhenyu Wang , Mukesh Tripathi , Aleksandra Radenovic , Andras Kis

Due to its high carrier mobility, broadband absorption, and fast response time, graphene is attractive for optoelectronics and photodetection applications. However, the extraction of photoelectrons in conventional metal-graphene junction…

Biological synapses store multiple memories on top of each other in a palimpsest fashion and at different timescales. Palimpsest consolidation is facilitated by the interaction of hidden biochemical processes that govern synaptic efficacy…

Neurons and Cognition · Quantitative Biology 2021-09-28 Christos Giotis , Alexander Serb , Vasileios Manouras , Spyros Stathopoulos , Themis Prodromakis

Progress in developing advanced photonic devices relies on introducing new materials, discovered physical principles, and optimal designs when constructing their components. Optical systems operating on the principles of excitation of…

The continuous effort in making artificial neural networks more alike to human brain calls for the hardware elements to implement biological synapse-like functionalities. The recent experimental demonstration of ferroelectric-like FETs…

The desire to empower resource-limited edge devices with computer vision (CV) must overcome the high energy consumption of collecting and processing vast sensory data. To address the challenge, this work proposes an energy-efficient…

Hardware Architecture · Computer Science 2024-02-26 Md Abdullah-Al Kaiser , Gourav Datta , Peter A. Beerel , Akhilesh R. Jaiswal

MoS2 atomic layers have recently attracted much interest because of their two-dimensional structure as well as tunable optical, electrical, and mechanical properties for next generation electronic and electro-optical devices. Here we have…

Materials Science · Physics 2016-11-15 Chih-Shan Tan , Yu-Jung Lu , Chun-Chi Chen , Pei-Hsuan Liu , Shangjr Gwo , Guang-Yu Guo , Lih-Juann Chen

Recently emerging large-area single-layer MoS2 grown by chemical vapor deposition has triggered great interest due to its exciting potential for applications in advanced electronic and optoelectronic devices. Unlike gapless graphene, MoS2…

The novel combination of a strongly-resonant optical metasurface with the MoS$_2$/WSe$_2$ hetero-bilayer is proposed for efficient free-space lasing enabled by the enhanced coupling between the optical and matter (exciton) states. The…

The increasing demand for efficient hardware in neural computation highlights the limitations of electronic-based systems in terms of speed, energy efficiency, and scalability. Wavelength-division multiplexing (WDM) photonic neural networks…

Optics · Physics 2025-02-18 Jorge Parra , Juan Navarro-Arenas , Pablo Sanchis

Thin films of colloidal semiconductor CdSe quantum-dots (QDs) and a styrene/maleic anhydride copolymer were prepared by the Langmuir-Blodgett technique and their photoluminescence was characterized by confocal fluorescence lifetime…

Edge devices equipped with computer vision must deal with vast amounts of sensory data with limited computing resources. Hence, researchers have been exploring different energy-efficient solutions such as near-sensor processing, in-sensor…

Image and Video Processing · Electrical Eng. & Systems 2023-01-24 Md Abdullah-Al Kaiser , Gourav Datta , Zixu Wang , Ajey P. Jacob , Peter A. Beerel , Akhilesh R. Jaiswal

The measurements of the high - temperature current - voltage characteristics of MoS2 thin - film transistors show that the devices remain functional to temperatures of at least as high as 500 K. The temperature increase results in decreased…

Materials Science · Physics 2015-06-23 C. Jiang , S. L. Rumyantsev , R. Samnakay , M. S. Shur , A. A. Balandin

Photodetectors based on two dimensional materials have attracted growing interest. However, the sensitivity is still unsatisfactory even under high gate voltage. Here we demonstrate a MoS2 photodetector with a poly(vinylidene…

Monolayer semiconducting transition metal dichalcogenides (S-TMDs) have been extensively studied as materials for next-generation optoelectronic devices due to their direct band gap and high exciton binding energy at room temperature. Under…

Materials Science · Physics 2024-09-26 Kurt H. Tyson , James R. Godfrey , James M. Fraser , Robert G. Knobel

Using an ab initio density functional theory (DFT) based electronic structure method, we study the effects of adatoms on the electronic properties of monolayer transition metal dichalcogenide (TMD) Molybdenum-disulfide (MoS2). We consider…

Mesoscale and Nanoscale Physics · Physics 2014-04-08 Jiwon Chang , Stefano Larentis , Emanuel Tutuc , Leonard F. Register , Sanjay K. Banerjee

This paper presents a mixed-signal neuromorphic accelerator architecture designed for accelerating inference with event-based neural network models. This fully CMOS-compatible accelerator utilizes analog computing to emulate synapse and…

Hardware Architecture · Computer Science 2024-10-14 Armin Abdollahi , Mehdi Kamal , Massoud Pedram