A5054502235- Advanced Memory and Neural Computing
- solar cell performance optimization
- Nanowire Synthesis and Applications
- Organic Electronics and Photovoltaics
- 2D Materials and Applications
- Graphene research and applications
- Thin-Film Transistor Technologies
- Advanced Sensor and Energy Harvesting Materials
- Gene expression and cancer classification
- Advanced Optical Network Technologies
- Perovskite Materials and Applications
- CCD and CMOS Imaging Sensors
- GaN-based semiconductor devices and materials
- Ferroelectric and Negative Capacitance Devices
- Electronic and Structural Properties of Oxides
- Quantum Dots Synthesis And Properties
- Thermal Radiation and Cooling Technologies
- MXene and MAX Phase Materials
- Lung Cancer Treatments and Mutations
- Semiconductor Quantum Structures and Devices
- Conducting polymers and applications
- Gas Sensing Nanomaterials and Sensors
- Ga2O3 and related materials
- Cancer Genomics and Diagnostics
- RNA modifications and cancer
University of Virginia
2016-2024
Samsung (South Korea)
2004-2023
Icahn School of Medicine at Mount Sinai
2023
Park University
2022
Yonsei University
2022
Hyundai Mobis (South Korea)
2020
Samsung SDS (South Korea)
2018-2019
Michigan United
2018
University of Michigan
1990-2018
Massachusetts Institute of Technology
2017-2018
Abstract Optical tracking is often combined with conventional flat panel solar cells to maximize electrical power generation over the course of a day. However, trackers are complex and require costly cumbersome structural components support system weight. Here we use kirigami (the art paper cutting) realize novel where integral structure at substrate level. Specifically, an elegant cut pattern made in thin-film gallium arsenide cells, which then stretched produce array tilted surface...
Cleaving with a metal handle Using adhesive tape to pull off monolayers of two-dimensional (2D) materials is now well-established approach. However, the flakes tend be micrometer scale, and creation multilayer stacks for device application can challenging time consuming. Shim et al. show that variety 2D materials, including molybdenum disulfide hexagonal boron nitride, cleaved from multilayers grown as 5-centimeter-diameter wafers. The capped nickel layer, which used entire stack. bottom...
Recent advances in flexible and stretchable electronics have led to a surge of electronic skin (e-skin)-based health monitoring platforms. Conventional wireless e-skins rely on rigid integrated circuit chips that compromise the overall flexibility consume considerable power. Chip-less based inductor-capacitor resonators are limited mechanical sensors with low sensitivities. We report chip-less e-skin surface acoustic wave made freestanding ultrathin single-crystalline piezoelectric gallium...
Abstract Purpose: One of the main challenges lung cancer research is identifying patients at high risk for recurrence after surgical resection. Simple, accurate, and reproducible methods evaluating individual risks are needed. Experimental Design: Based on a combined analysis time-to-recurrence data, censoring information, microarray data from set 138 patients, we selected statistically significant genes thought to be predictive disease recurrence. The number was further reduced by...
Abstract The rearrangement of TCR genes during thymic ontogeny creates a repertoire T cell specificities that is refined to ensure the deletion autoreactive clones and MHC restriction responses. Signals delivered via accessory molecules CD2, CD4, CD8 have crucial role in this phase differentiation. Recently, CD28 has been identified as signal transducing molecule on surface most mature cells. Perturbation stimulates novel pathway activation regulating production variety lymphokines including...
Circulating tumor cells (CTCs) have great potential to provide minimally invasive ways for the early detection of cancer metastasis and response monitoring various treatments. Despite clinical importance progress CTC-based diagnostics, most current methods enriching CTCs are difficult implement in general hospital settings due complex time-consuming protocols. Among existing technologies, size-based isolation antibody-independent, relatively simple, high throughput However, clogging issues...
Multispectral photodetectors are emerging devices capable of detecting photons in multiple wavelength ranges, such as visible (VIS), near infrared (NIR), etc. Image data acquired with these can be used for effective object identification and navigations owing to additional information beyond human vision, including thermal image night vision. However, capabilities hindered by the structural complexity arising from integration heterojunctions selective absorbers. In this paper, we demonstrate...
Deep-ultraviolet (DUV) photodetectors based on wide-band-gap semiconductors have attracted significant interest across a wide range of applications in the industrial, biological, environmental, and military fields due to their solar-blind nature. As one most promising materials, β-Ga2O3 provides great application potential over detection wavelengths ranging from 230 280 nm owing its superior optoelectronic performance, stability, compatibility with conventional fabrication techniques....
As machine vision technology generates large amounts of data from sensors, it requires efficient computational systems for visual cognitive processing. Recently, in-sensor computing have emerged as a potential solution reducing unnecessary transfer and realizing fast energy-efficient However, they still lack the capability to process stored images directly within sensor. Here, we demonstrate heterogeneously integrated 1-photodiode 1 memristor (1P-1R) crossbar processing, emulating mammalian...
Significant effort for demonstrating a gallium nitride (GaN)-based ferroelectric metal-oxide-semiconductor (MOS)-high-electron-mobility transistor (HEMT) reconfigurable operation via simple pulse has been hindered by the lack of suitable materials, gate structures, and intrinsic depolarization effects. In this study, we have demonstrated artificial synapses using GaN-based MOS-HEMT integrated with an α-In2Se3 semiconductor. The van der Waals heterostructure GaN/α-In2Se3 provides potential to...
Practical solar energy solutions must not only reduce the cost of module, but also address substantial balance system costs. Here, we demonstrate a counter-intuitive approach based on gallium arsenide cells that can achieve extremely low-cost conversion with an estimated 3% conventional using accelerated, non-destructive epitaxial lift-off wafer recycling process along lightweight, thermoformed plastic, truncated mini-compound parabolic concentrator avoids need for active tracking. Using...
We demonstrate repeated use of GaAs wafers for multiple growths by employing lattice-matched epitaxial protection layers to preserve the wafer surface in its original condition following their etch removal after growth. The provide a regrowth that eliminates need repolishing prior subsequent Between growths, are removed wet chemical etching. resulting quality is examined using atomic force microscope and energy dispersive spectrometry. show roughness, composition, morphology, electronic...
Compound semiconductors are the basis for many of highest performance optical and electronic devices in use today. Their widespread commercial application has, however, been limited due to high cost substrates. Device costs can be significantly reduced if substrate is reused a simple, totally non‐destructive rapid process. Here, method that allows indefinite reuse recycling wafers demonstrated, employing combination epitaxial “protection layers”, plasma cleaning techniques return their...
In this study, we demonstrate ferroelectric GaN high-electron mobility transistors (HEMTs) with a sputtered AlScN gate dielectric, exhibiting large memory window of ~ 14.6 V and high on/off ratio <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sim ~10^{{8}}$ </tex-math></inline-formula> . The strong polarization layer contributes to the remarkably threshold voltage ( notation="LaTeX">$\text{V}_{\text...
Introduction For drug resistant epilepsy patients who are either not candidates for resective surgery or have already failed surgery, neuromodulation is a promising option. Neuromodulatory approaches include responsive neurostimulation (RNS), deep brain stimulation (DBS), and vagal nerve (VNS). Thalamocortical circuits involved in both generalized focal onset seizures. This paper explores the use of RNS centromedian nucleus thalamus (CMN) anterior thalamic (ANT) with epilepsy. Methods...