A5101792240- Magnetic and transport properties of perovskites and related materials
- Electrocatalysts for Energy Conversion
- Advanced Condensed Matter Physics
- Transportation Planning and Optimization
- Vehicle Routing Optimization Methods
- Multiferroics and related materials
- Transportation and Mobility Innovations
- Fuel Cells and Related Materials
- Advancements in Battery Materials
- Metamaterials and Metasurfaces Applications
- Luminescence and Fluorescent Materials
- Advanced battery technologies research
- Quantum Dots Synthesis And Properties
- Advanced Antenna and Metasurface Technologies
- Extraction and Separation Processes
- Magnetic properties of thin films
- Topological Materials and Phenomena
- Electromagnetic wave absorption materials
- Advanced Sensor and Energy Harvesting Materials
- Magnetic Properties of Alloys
- Wind and Air Flow Studies
- Metal Extraction and Bioleaching
- Simulation and Modeling Applications
- Quantum many-body systems
- Traffic Prediction and Management Techniques
University of California, Riverside
2023-2024
China Rural Technology Development Center
2024
Yunnan University
2024
Aerospace Information Research Institute
2023
Beijing Jiaotong University
2015-2023
Tsinghua University
2018-2020
Tsinghua–Berkeley Shenzhen Institute
2020
University of Maryland, College Park
2017-2020
Nanjing University of Science and Technology
2020
Chinese Academy of Sciences
2001-2019
Abstract Carbon‐supported low‐Pt ordered intermetallic nanoparticulate catalysts (PtM 3 , M = Fe, Co, and Ni) are explored in order to enhance the oxygen reduction reaction (ORR) activity while achieving a high stability compared previously reported Pt‐richer intermetallics (Pt PtM) disordered alloy catalysts. Upon high‐temperature thermal annealing, PtCo nanoparticles successfully prepared with minimum particle sintering. In contrast, PtFe catalyst, despite formation of structure, suffers...
Colloidal assembly into chiral superstructures is usually accomplished with templating or lithographic patterning methods that are only applicable to materials specific compositions and morphologies over narrow size ranges. Here, can be rapidly formed by magnetically assembling of any chemical at all scales, from molecules nano- microstructures. We show a quadrupole field chirality generated permanent magnets caused consistent rotation in space. Applying the magnetic nanoparticles produces...
Abstract Incorporating mechanoluminescent (ML) materials into piezoelectric polymer nanofibers enables the development of advanced pressure sensors and human–machine interactive devices by providing mechanical flexibility enhancing processibility. This study demonstrates that introducing water during electrospinning process significantly improves properties polyvinylidene fluoride (PVDF)‐based polymers, attributed to enhanced formation piezoelectrically active β ‐phases. A biphasic...
Colloidal assembly has emerged as an effective avenue for achieving polarized light emission. Here, we showcase the efficacy and versatility of magnetic colloidal in enabling both linearly circularly luminescence. europium-doped NaYF4 nanorods with surface-bound Fe3O4 nanoparticles are magnetically assembled into linear or chiral superstructures using corresponding fields created permanent magnets. In a uniform field generated by opposing poles, assemblies exhibit photoluminescence intensity...
We report on the magneto-transport properties of chemical vapor deposition grown films interconnected Bi2Te3 nanoplates. Similar to many other topological insulator (TI) materials, these granular exhibit a linear magneto-resistance (LMR) effect which has received much recent attention. Studying samples with different degree granularity, we find universal correlation between magnitude LMR and average mobility (<\mu>) over nearly two orders change <\mu>. The granularity controlled here is...
Transportation-induced damage to fresh produce is a big challenge in logistics. Current acceleration and pressure sensors for collision monitoring face issues of power dependency, high cost, environmental concerns. Here, self-powered environmentally friendly triboelectric sensor has been developed monitor fruit collisions transportation packaging. Microcrystalline cellulose/chitosan sodium alginate films were prepared as positive negative tribo-layers assemble natural polysaccharide...
Effective thawing of cryopreserved samples requires rapid and uniform heating. This is achievable through nanowarming, an approach that heats magnetic nanoparticles by using alternating fields. Here we demonstrate the synthesis surface modification nanoclusters for efficient nanowarming. Magnetite (Fe3O4) with optimal diameter 58 nm exhibit a high specific absorption rate 1499 W/g Fe under field at 43 kA/m 413 kHz, more than twice commercial iron oxide cores used in prior nanowarming...
Mechanoluminescent (ML) materials with reduced dimensions have the potential to advance development of optical microdevices. However, their progress has been hindered by limited understanding ML properties at length scale nano- micrometers. This study aims optimize performance Mn2+-doped wurtzite ZnS examining evolution size, morphology, phase, and surface property as-prepared nanorods during calcination elevated temperatures. It reveals a complex dependence phase on surface-capping ligands,...
The crystal structures and magnetic properties of the 40 nm brownmillerite SrMnO2.5 film, perovskite SrMnO3-δ mixed-phase film have been systematically investigated. features oxygen vacancy ordering superstructure in are observed from HRSTEM as follows: dark stripes with a periodicity four (110) planes cubic appearing at an angle 45° substrate-film interface extra reflection spots fast Fourier transformation patterns along (001) plane. When annealing under higher pressure, top portion...
Structurally ordered intermetallic structure is an efficient catalyst design strategy to significantly improve the catalytic performance of Pt alloy electrocatalysts for oxygen reduction reaction in fuel cells. However, a high structural ordering degree generally relies on high-temperature annealing, which results detrimental particle sintering. Herein, we reveal that incompatibility between and minimum sintering during thermal annealing can be resolved through rational development...
Thermal annealing is an indispensable process during the preparation and structural ordering of Pt alloy fuel cell catalysts, which exhibit superior electrocatalytic activities as compared to catalysts thus enable decreased usage. However, thermal usually induces detrimental particle sintering, greatly offsets performance enhancement. Although mechanisms sintering monometallic have been well studied, knowledge on key factors controlling still very poor. Herein, we perform in situ heating...
Metal dissolution and redeposition are considered to be the most important degradation mechanism for Pt-based fuel cell electrocatalysts. Understanding key factors mitigating migration under realistic proton-exchange-membrane (PEM) cells is crucial improving their performance durability. Using ordered disordered PtCo electrocatalysts, we address how structural ordering particle size can affect of Co/Pt into membrane upon catalyst accelerated durability test in PEM by statistical scanning...
Metallic LaNiO<sub>3</sub> powder shows excellent EM absorption due to arc-discharge effect, which can modulate the complex permittivity of LNO–FeCo/C composites.
Article Piezocatalytic ZnS: Mn2+ Nanocrystals for Enhanced Organic Dye Degradation Zhongxiang Wang 1, Elizaveta Tiukalova 2, Youyi Tai 3, Miaofang Chi Jin Nam 3,* and Yadong Yin 1,* 1 Department of Chemistry, University California, Riverside, CA 92521, USA 2 Center Nanophase Materials Sciences, Oak Ridge National Laboratory, Ridge, TN 37831, 3 Bioengineering, * Correspondence: jnam@engr.ucr.edu (J.N.); yadong.yin@ucr.edu (Y.Y.) Received: 15 October 2024; Revised: 20 November Accepted: 21...
The permittivity and permeability of Zn or Zn(Fe) nanoparticles with core-shell structure were investigated for frequencies from 2 to 18 GHz. particles contain oxides shell in the form ZnO, while core material is Zn(Fe). resonance frequency corresponds maximum microwave absorption Zn/ZnO nanocapsules, which not shifted changing thickness absorbent. However, doping Fe (about 40%) position lower increasing
Compositional segregations in shaped alloy nanoparticles can significantly affect their catalytic activity and are largely dependent on elemental anisotropic growth diffusion during nanoparticle synthesis. An efficient approach to control the surface while keeping shape highly desired for fine-tuning properties. Using octahedral Pt–Ni as a typical example, we report new strategy modulate composition of bimetallic by microwave-enhanced solvothermal Compared traditional synthesis, application...
School bus planning is usually divided into routing and scheduling because of the complexity solving them concurrently. However, separation between these two steps may lead to worse solutions with higher overall costs than from together. When minimal number trips in problem being determined, neglecting trip compatibility could increase buses needed problem. This paper proposes a new formulation for multischool homogeneous fleet that maximizes while minimizing total travel time. plan...
Understanding the role of surfactants or ligands on growth mechanism metal/alloy nanoparticles (NPs) is important for controlled synthesis functional metallic NPs with tailored structures and properties. There have been a number works showing significant impact surfactants/ligands shape-controlled nanocrystals well-defined surfaces. Beyond morphological shape control, alloying structure bimetallic nanocrystals, however, still remains largely unaddressed. We reveal here effect benzoic acid...
NiAs-type manganese telluride (MnTe) films with preferred crystallographic plane of (110) were prepared on Si/SiO2 substrates by pulsed laser deposition. X-ray diffraction (XRD) the was studied at different temperatures. The XRD peak MnTe shifts to higher angle decreasing temperature, showing decrease lattice parameter. Resistivity in temperature range 2–350 K. bump between 150 and 250 K observed films, which may be related special s-d p-d overlaps induced compressed lattice. magnon drag...