A5012085818- Semiconductor materials and devices
- Advanced Memory and Neural Computing
- Advancements in Battery Materials
- GaN-based semiconductor devices and materials
- Advanced Battery Materials and Technologies
- Nanowire Synthesis and Applications
- Semiconductor materials and interfaces
- Metal-Organic Frameworks: Synthesis and Applications
- Transition Metal Oxide Nanomaterials
- Electron and X-Ray Spectroscopy Techniques
- Gas Sensing Nanomaterials and Sensors
- Advanced Battery Technologies Research
- Ga2O3 and related materials
- ZnO doping and properties
- Ferroelectric and Negative Capacitance Devices
- Force Microscopy Techniques and Applications
- Conducting polymers and applications
- Advancements in Semiconductor Devices and Circuit Design
- Integrated Circuits and Semiconductor Failure Analysis
- Neural Networks and Applications
- Machine Learning in Materials Science
- Molecular Junctions and Nanostructures
- Semiconductor Quantum Structures and Devices
- Carbon Nanotubes in Composites
- Advanced Thermoelectric Materials and Devices
Sandia National Laboratories California
2016-2025
Sandia National Laboratories
2015-2025
Material Physics Center
2010-2025
University of Maryland, College Park
2023-2024
IEEE Computer Society
2023
Institute of Electrical and Electronics Engineers
2023
Regional Municipality of Niagara
2023
Lawrence Livermore National Security
2006-2021
Center for Nanoscale Science and Technology
2010-2016
National Institute of Standards and Technology
2009-2016
Guests for Conductors Thin films of metal-organic framework (MOF) compounds are generally poor conductors because the linking organic groups usually insulators with little π-orbital conjugation. Talin et al. (p. 66 , published online 5 December) show that infiltrating copper-based MOF HKUST-1 conjugated molecule 7,7,8,8-tetracyanoquinododimethane created an air-stable material conductivities as high 7 siemens per meter.
Neuromorphic computers could overcome efficiency bottlenecks inherent to conventional computing through parallel programming and readout of artificial neural network weights in a crossbar memory array. However, selective linear weight updates <10-nanoampere read currents are required for learning that surpasses efficiency. We introduce an ionic floating-gate array based on polymer redox transistor connected conductive-bridge (CBM). Selective is executed by overcoming the bridging threshold...
Nonvolatile redox transistors (NVRTs) based upon Li-ion battery materials are demonstrated as memory elements for neuromorphic computer architectures with multi-level analog states, "write" linearity, low-voltage switching, and low power dissipation. Simulations of backpropagation using the device properties reach ideal classification accuracy. Physics-based simulations predict energy costs per operation <10 aJ when scaled to 200 nm × nm.
In this work we demonstrate the concept of stress-induced chemical detection using metal−organic frameworks (MOFs) by integrating a thin film MOF HKUST-1 with microcantilever surface. The results show that energy molecular adsorption, which causes slight distortions in crystal structure, can be converted to mechanical create highly responsive, reversible, and selective sensor. This sensor responds water, methanol, ethanol vapors, but yields no response either N2 or O2. magnitude signal, is...
Abstract Metal–organic frameworks (MOFs) and related material classes are attracting considerable attention for applications such as gas storage, separations, catalysis. In contrast, research focused on potential uses in electronic devices is its infancy. Several sensing concepts which the tailorable chemistry of MOFs used to enhance sensitivity or provide chemical specificity have been demonstrated, but only a few cases an integral part actual device. The synthesis electrically conducting...
Abstract Electronic synaptic devices are important building blocks for neuromorphic computational systems that can go beyond the constraints of von Neumann architecture. Although two‐terminal memristive demonstrated to be possible candidates, they suffer from several shortcomings related filament formation mechanism including nonlinear switching, write noise, and high device conductance, all which limit accuracy energy efficiency. Electrochemical three‐terminal transistors, in channel...
Abstract With vibrant colours and simple, room-temperature processing methods, electrochromic polymers have attracted attention as active materials for flexible, low-power-consuming devices. However, slow switching speeds in devices realized to date, well the complexity of having combine several distinct achieve a full-colour gamut, limited niche applications. Here we fast, high-contrast by significantly enhancing interaction light—propagating deep-subwavelength-confined surface plasmon...
A new thermoelectric material with high Seebeck coefficient and low thermal conductivity is demonstrated based on an electrically conducting metal–organic framework (MOF) using the [email protected] concept. This demonstration opens a avenue for future development of materials. As service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized online delivery, but not copy-edited or typeset. Technical...
Terahertz (THz) technologies are promising for diverse areas such as medicine, bioengineering, astronomy, environmental monitoring, and communications. However, despite decades of worldwide efforts, the THz region electromagnetic spectrum still continues to be elusive solid state technology. Here, we report on development a powerless, compact, broadband, flexible, large-area, polarization-sensitive carbon nanotube detector that works at room temperature. The is sensitive throughout entire...
Both LiCB9H10 and NaCB9H10 exhibit liquid-like cationic conductivities (≥0.03 S cm−1) in their disordered hexagonal phases near or at room temperature. These unprecedented favorable stabilities enabled by the large pseudoaromatic polyhedral anions render these materials pristine further modified forms as promising solid electrolytes next-generation, power devices.
Topological superconductors represent a newly predicted phase of matter that is topologically distinct from conventional superconducting condensates Cooper pairs. As manifestation their topological character, support solid-state realizations Majorana fermions at boundaries. The recently discovered superconductor Cu(x)Bi(2)Se(3) has been theoretically proposed as an odd-parity in the time-reversal-invariant class, and point-contact spectroscopy measurements have reported observation zero-bias...
Recent progress in artificial intelligence is largely attributed to the rapid development of machine learning, especially algorithm and neural network models. However, it performance hardware, particular energy efficiency a computing system that sets fundamental limit capability learning. Data-centric requires revolution hardware systems, since traditional digital computers based on transistors von Neumann architecture were not purposely designed for neuromorphic computing. A platform...
Abstract Flexible electronic skin with features that include sensing, processing, and responding to stimuli have transformed human–robot interactions. However, more advanced capabilities, such as human‐like self‐protection modalities a sense of pain, sign injury, healing, are challenging. Herein, novel, flexible, robust diffusive memristor based on copolymer chlorotrifluoroethylene vinylidene fluoride (FK‐800) an artificial nociceptor (pain sensor) is reported. Devices composed Ag/FK‐800/Pt...
Abstract Ambient energy harvesting has great potential to contribute sustainable development and address growing environmental challenges. Converting waste from energy-intensive processes systems (e.g. combustion engines furnaces) is crucial reducing their impact achieving net-zero emissions. Compact harvesters will also be key powering the exponentially smart devices ecosystem that part of Internet Things, thus enabling futuristic applications can improve our quality life homes, cities,...
Synthetic methods used to produce metal nanoparticles typically lead a distribution of particle sizes. In addition, creation the smallest clusters, with sizes few tens atoms, remains very challenging. Nanoporous metal−organic frameworks (MOFs) are promising solution these problems, since their long-range crystalline order creates completely uniform pore potential for both steric and chemical stabilization. We report systematic investigation silver nanocluster formation within MOFs using...
Metal-organic frameworks (MOFs) are crystalline nanoporous materials comprised of organic electron donors linked to metal ions by strong coordination bonds. Applications such as gas storage and separations currently receiving considerable attention, but if the unique properties MOFs could be extended electronics, magnetics, photonics, impact on material science would greatly increase. Recently, we obtained "emergent properties," electronic conductivity energy transfer, infiltrating MOF pores...
The distribution of mitochondria to daughter cells is an essential feature mitotic cell growth, yet the molecular mechanisms facilitating this mitochondrial inheritance are unknown. We have isolated mutants Saccharomyces cerevisiae that temperature-sensitive for transfer into a growing bud. Two these contain single, recessive, nuclear mutations, mdm1 and mdm2, cause growth aberrant at nonpermissive temperature. absence from buds mutant was confirmed by indirect immunofluorescence microscopy...
We report the growth of exceptionally well aligned and vertically oriented GaN nanowires on r-plane sapphire wafers via metal–organic chemical vapour deposition. The were grown without use either a template or patterning. Transmission electron microscopy indicates are single crystalline, free threading dislocations, have triangular cross-sections. high degree vertical alignment is explained by crystallographic match between surface. find that size uniformity highly dependent nickel nitrate...
The current-voltage characteristics of thin wires are often observed to be nonlinear, and this behavior has been ascribed Schottky barriers at the contacts. We present electronic transport measurements on GaN nanorods demonstrate that nonlinear originates instead from space-charge-limited current. A theory current in corroborates experiments shows poor screening high-aspect ratio materials leads a dramatic enhancement space-charge limited current, resulting new scaling terms aspect ratio.