A5100637929- Graphene research and applications
- Gas Sensing Nanomaterials and Sensors
- 2D Materials and Applications
- Nanowire Synthesis and Applications
- Analytical Chemistry and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Catalysis and Oxidation Reactions
- Conducting polymers and applications
- Catalytic Processes in Materials Science
- Quantum and electron transport phenomena
- Perovskite Materials and Applications
- Copper-based nanomaterials and applications
- Molecular Junctions and Nanostructures
- Nanopore and Nanochannel Transport Studies
- Advanced ceramic materials synthesis
- Epoxy Resin Curing Processes
- Chalcogenide Semiconductor Thin Films
- Carbon Nanotubes in Composites
- Aluminum Alloys Composites Properties
- Advanced Nanomaterials in Catalysis
- Graphene and Nanomaterials Applications
- Synthesis and properties of polymers
- Transition Metal Oxide Nanomaterials
- Carbon and Quantum Dots Applications
- Advanced Chemical Sensor Technologies
Joint Institute for Nuclear Astrophysics
2025
University of Michigan
2025
Shanghai Jiao Tong University
2024-2025
Micro & Nano Research Institute
2025
Huazhong University of Science and Technology
2024
Shandong University of Technology
2022-2024
East China University of Science and Technology
2024
Jiangxi Agricultural University
2021-2023
Shaanxi Normal University
2023
Chongqing University of Science and Technology
2022
The poor gas selectivity problem has been a long-standing issue for miniaturized chemical-resistor sensors. electronic nose (e-nose) was proposed in the 1980s to tackle issue, but it required top-down chemical functionalization processes deposit multiple functional materials. Here, we report novel gas-sensing scheme using single graphene field-effect transistor (GFET) and machine learning realize under particular conditions by combining unique properties of GFET e-nose concept. Instead...
Electrospinning, a process that converts solution or melt droplet into an ejected jet under high electric field, is well-established technique to produce one-dimensional (1D) fibers two-dimensional (2D) randomly arranged fibrous meshes. Nevertheless, the direct electrospinning of controllable three-dimensional (3D) architectures still nascent technology. Here, we apply near-field (NFES) directly write arbitrarily shaped 3D structures through consistent and spatially controlled fiber-by-fiber...
With the development of sustainable technology and continuous innovation people’s travel styles, smart tourism (STT) is widely used in various fields. STT has changed traditional experience while enhancing destination competitiveness. This study examines relationships between perceived experience, revisit intention. A total 312 valid questionnaires were collected from tourists who had using local Macau. structural equation modeling (SEM) was to test proposed model, results showed that a...
High-voltage direct-current (HVdc) transmission lines have been implemented in many countries, including Australia, Brazil, China, and Sweden, the safety concerns as result of high electromagnetic-radiation underneath HVdc garnered increased public attentions. Here, we report on model, design, testing field-mill electric field sensors to measure at ground level under lines. This study utilized a finite-element analysis method establish numerical simulation results based electrical mechanical...
Upconversion nanoparticles (UCNPs) have been widely explored for various bioapplications because of their unique optical properties, easy surface functionalization, and low cytotoxicity. Herein, we synthesize gadolinium (Gd3+)-doped UCNPs, which are modified first with poly(ethylene glycol) (PEG) then two layers poly(ethylenimine) (PEI) via covalent conjugation layer-by-layer assembly, respectively. Compared UCNP-PEG@1×PEI only one layer PEI coating, the final complex, UCNP-PEG@2×PEI,...
An ultraviolet detector is demonstrated through a whole‐wafer, thin diamond film transfer process to realize the heterojunction between graphene and microcrystalline (MCD). Conventional direct processes fail deposit onto top surface of MCD film. However, it found that 2 µm thick can be easily peeled off from growth silicon substrate expose its smooth backside for high‐quality graphene/MCD heterojunctions. A vertical graphene/MCD/metal structure constructed as photodiode device using...
Abstract Understanding the influences of defect states on gas adsorption graphene is at heart developing based sensors for practical applications. However, it has been challenging to experimentally discriminate adsorptions induced by defects graphene, especially charged impurities commonly found transferred samples. Here, using a transistor biased with quasistatic gate voltage, this study measures charge density and scattering strength adsorbents directly resolves defect‐induced versus...
This study explores the heterogeneous impact of local government debt on credit risk across state-owned and urban rural commercial banks in China, through analysis stress test methodology quarter-based data period 2014–2021. It found that if scale of expands, Non-Performing Loan (NPL) rates will reduce state-owned banks, while increase. In case further decay macroeconomic indicators, there would be more a manner among different-sized banks. Medium-sized have smallest rise non-performing...
Delta doping (δ-doping) has extensive applications in advanced metal oxide semiconductor field effect transistors, quantum devices, and deep ultraviolet (DUV) photodetectors. In this work, we demonstrate a novel method for high-concentration phosphorus δ-doping silicon using pulsed laser annealing assisted with argon preimplantation. The layer peak concentration of 1.44 × 1020 cm–3. Low-temperature Hall measurements reveal that the is metallic state exhibits weak localization phenomenon,...
Photodetectors based on two-dimensional (2D) atomically thin semiconductors suffer from low light absorption, limiting their potential for practical applications. In this work, we demonstrate high-performance MoS2 phototransistors by integrating few-layer a PN junction formed silicon (Si) substrate. The photovoltage created in the under illumination electrically gates channel, creating strong photoresponse MoS2. We present theory to predict photocurrent of proposed phototransistor...
A novel process to create self-aligned and chemically doped graphene channel is presented. Near-field electrospinning utilized pattern dope the layer using functionalized polymers such as PEI PEO. Field effects of p- n-type transistors are fabricated complimentary inverter circuitry electronic junctions successfully demonstrated. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for online...
Magnetic resonance (MR) imaging using magnetic nanoparticles as the contrast agent has been extensively explored in biomedical and disease diagnosis. Herein, we develop biocompatible polymer coated ultra-small Pt3Co a new T2-weighted MR agent. A unique class of alloy is synthesized through thermal decomposition method. After being modified with polyethylene glycol (PEG), obtained Pt3Co–PEG exhibit an extremely high relaxivity rate (r2) up to 451.2 mM s−1, which much higher than that...
This work marks the first use of phase spectra detection method to realize selective sensing chemical vapors on a vapor deposition (CVD) monolayer graphene field effect transistor (FET). Compared with state-of-art technology, three distinctive advances have achieved: (1) demonstration gas using single CVD FET without surface functionalization; (2) quantitative results for four (water, methanol, ethanol and isopropanol) different concentrations; (3) illustrations selectivity by extraction...
In order to improve the reliability of phthalonitrile resins in extreme service environments, a high cyanodensity monomer (BPN) containing branched cyano groups was synthesized from 3,4-dihydroxybenzonitrile and 4-nitrophthalonitrile characterized by 1H NMR FTIR. It found that polymerized BPN (p-BPN) exhibited excellent thermal properties with Td5 540 °C when tested N2 thermogravimetric analysis (TGA), as well glass transition temperature (Tg) p-BPN1 exceeded 480 dynamic mechanical (DMA). A...
Abstract The growth of large and high‐quality 2D nanomaterials is challenging due to the formation defects from dislocations, disinclinations, symmetry‐breaking instabilities. In this study it demonstrated that biological template can be utilized align molecular orientation for grain size in synthesis silver nanostructure. solvent assisted multilayering phenomenon hydrogel forms at air/gel interface supports salts grow laterally largely a manner between scaffold layers with nominal thickness...
This work reveals a new AC sensing scheme to achieve fast recovery and minimal baseline drift of gas sensors based on graphene FETs. Compared with the state-of-art technologies, three distinctive advancements have been achieved: (1) first demonstration using phase lag signal between channel resistance gate voltage as sensitive detection FETs; (2) achieving ultrafast speed (~10s) defect rich, chemical vapor deposition (CVD) grown monolayer FET for various tested gases, including water,...
This work marks the first use of an AC sensing technique on a graphene transistor to realize label-free gas 100 ppb-level formaldehyde in air at room temperature. Compared with state-of-art technology, three distinctive advances have been achieved: (1) extraordinary sensitivity trace amount using phase detection method single made monolayer from chemical vapor deposition (CVD) process without adding functional materials; (2) high signal stability devices or artificial defects; (3) fast...