A5070600996- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Nanowire Synthesis and Applications
- Microwave Engineering and Waveguides
- Radar Systems and Signal Processing
- Metamaterials and Metasurfaces Applications
- Graphene research and applications
- Carbon Nanotubes in Composites
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced SAR Imaging Techniques
- Electrocatalysts for Energy Conversion
- Advanced Photocatalysis Techniques
- Semiconductor materials and interfaces
- Advanced battery technologies research
- Advancements in Semiconductor Devices and Circuit Design
- Millimeter-Wave Propagation and Modeling
- Gas Sensing Nanomaterials and Sensors
- Anodic Oxide Films and Nanostructures
- Conducting polymers and applications
- Nanomaterials and Printing Technologies
- Advanced Semiconductor Detectors and Materials
- Nanopore and Nanochannel Transport Studies
- Nanofabrication and Lithography Techniques
- Radio Frequency Integrated Circuit Design
Hainan Tropical Ocean University
2020
South China University of Technology
2019
Tsinghua University
2004-2018
State Key Laboratory of New Ceramics and Fine Processing
2011-2016
Institute of Microelectronics
2012-2014
United States Naval Academy
2014
The adhesion of as-formed gas bubbles on the electrode surface usually impedes mass-transfer kinetics and subsequently decreases electrolysis efficiency. Here it is demonstrated that nanostructured MoS2 films conductive substrates show a faster hydrogen evolution reaction (HER), current increase, more-stable working state than their flat counterpart by significantly alleviating electrode. This study clearly reveals importance nano-porous structure for HER, which should be general beneficial...
Although carbonaceous materials possess long cycle stability and high power density, their low-energy density greatly limits applications. On the contrary, metal oxides are promising pseudocapacitive electrode for supercapacitors due to high-energy density. Nevertheless, poor electrical conductivity of constitutes a primary challenge that significantly energy storage capacity. Here, an advanced integrated high-performance pseudocapacitors has been designed by growing...
A 4H structural silver nanowire (4H-AgNW) is discovered to coexist with a face-centered cubic (FCC) one prepared by electrochemical deposition and have the highest concentration in total of 4H- FCC-AgNWs diameters around 30 nm. Moreover, becomes smaller when deviate from This size effect arises fact that 4H-AgNW has more favorable surface configuration but higher volume internal energy than FCC-AgNW, which proved our model.
ZnO 3D hierarchical structures assembled by different low-dimensional building blocks (nanosheet, nanoneedle) have been successfully synthesized at room temperature without the addition of organic agents. The morphology can be well controlled simply changing concentration reactant. On basis experimental results, a possible mechanism for formation is proposed. photoluminescence spectra show that relative intensity UV emission increases from nanosheets to thin needle flowers and tuned...
We have developed a method combining lithography and catalytic etching to fabricate large-area (uniform coverage over an entire 5-in. wafer) arrays of vertically aligned single-crystal Si nanowires with high throughput. Coaxial n-Si/p-SiGe wire are also fabricated by further coating epitaxial SiGe layers on the wires using ultrahigh vacuum chemical vapor deposition (UHVCVD). This allows precise control diameter, length, density, spacing, orientation, shape, pattern location Si/SiGe nanowire...
Aligned and diameter-controlled one-dimensional nickel–carbon nanotubes Ag–Si heterojunctions (see Figure) have been synthesized by a novel combination of electrochemical deposition chemical vapor with anodic aluminum oxide templates. No external catalysts are introduced in the reactions. In joint regions heterojunctions, no amorphous layers found. These significant for development electronics.
Density gradient ultracentrifuge separation has been employed as a process-analysis microsystem combining microreactor and separator. As paradigm, intermediates formed after tens of seconds in the galvanic replacement Ag nanoplates high concentrated AuCl4− solution are captured, providing evidence mechanism reaction, which is difficult to obtain other ways.
In this letter, a novel distributed de-embedding solution with double open-short structures are proposed and investigated. The effect is well considered by regarding the interconnection as scalable transmission line at high frequency all parasitic parameters can be extracted directly three steps. Experimental results show general technique provides more stable on-wafer extraction than well-adopted SLOT millimeter-wave frequency.
Abstract A one‐dimensional heterojunction is fabricated and characterized. This comprises a Ni nanowire, multiwalled carbon nanotube (MWCNT), an amorphous (a‐CNT). The three components are in end‐to‐end configuration, form two MWCNT contacts, namely Ni/MWCNT MWCNT/a‐CNT contact. interfacial structures of the contacts show that multiple outer walls simultaneously contact nanowire a‐CNT, can participate electrical transport. By investigating electrical‐transport properties heterojunctions, to...
An extrusion method, using anodic aluminium oxide (AAO) membranes as templates, has been developed to fabricate Nafion®-115 nanowire arrays. Surface decoration of the templates plays an important role in synthesis By sodium dodecyl sulfate (SDS) a surfactant surface decoration, filling rate nanowires corresponding template exceeds 95%, compared with 42% undecorated template, while on cetyltrimethylammonium bromide (CTAB) surfactant, is only about 20%. Systematical investigations show that...
Metasurfaces have been used to design various new devices in microwaves and optics, this letter presents a novel application of metasurfaces, which is an artificial matching layer (AML) with arbitrary permittivity. In contrast conventional that requires certain permittivity λ/4 thickness, substrate available can be designed as effective the usage proper metasurface. The general approach described letter, several examples are presented. Full-wave simulation results agree well theoretical...
A microstrip line-fed patch antenna array is developed based on a novel PCB/epoxy/polypropylene/epoxy composite substrate for 60-GHz WPAN applications. The features high RF performance as PTFE or LTCC, while the cost and manufacturing complexity much lower than above two materials, therefore provides great convenience integration of antennas with transceiver front-end at band. This paper introduces fabrication process in detail, 2×2 4×4 demo arrays fabricated are developed. Measurement...
Porous carbon nanofibers containing iron and nitrogen, represented by the cubes in image, are developed J. Luo, Zhu, co-workers to efficiently catalyze oxygen reduction reaction fuel cells. As described on page 4072, produced from electrospun polymer fibers that denoted flower-like fiber bundle with an open end image. When bubbles meet nanofibers, energies (‘lightning’ bubble centers) can be generated.
A multi-channel readout ASIC for pixelated CZT detectors has been developed gamma-ray spectroscopy applications. Each channel consists of a low noise dual-stage charge sensitive amplifier (CSA), CR-(RC)4 semi-Gaussian shaper and class-AB output buffer. The equivalent (ENC) input PMOS transistor is optimized 5 pF capacitance 1 μs peaking time using gm/ID design methodology. gain can be adjusted from 100 mV/fC to 400 the 4 μs. 16-channel chip designed fabricated in 0.35 μm 2P4M CMOS...
This paper proposes a novel transmitarray element consisting of 3-layer identical E-shaped metal patch. Several elements different shapes are analyzed. The unit is developed to alleviate the cross polarization level in this linear-polarized design, and smooth phase curve obtained. Through simulation, proposed reaches range 270 degrees above -1dB transmission magnitude, an average 50dB discrimination.
We present a novel substrate material with good RF performances and low cost for the fabrication of millimeter-wave microstrip antennas. The takes copper layer FR-4 PCB board as its ground plane, an Epoxy/Polypropylene/Epoxy composite is used dielectric antenna. A 4×4 patch antenna array 60GHz WPAN has been designed fabricated on demonstration, results simulation preliminary measurement are provided well.
Abstract A high‐gain and broadband linear‐polarized transmitarray antenna is proposed in this paper, its element composed of 4 identical layers E‐shaped patches separated by quarter‐wavelength air gaps. To cover the required phase range, dual‐resonant developed; realizing transmission, low cross‐polarization level, stable oblique‐incident response. prototype using 4‐layer designed, fabricated, tested. The has a broad 1‐dB gain bandwidth 15%, high 33.0 dBi, an aperture efficiency 40%.