A5049999335- Advancements in PLL and VCO Technologies
- Radio Frequency Integrated Circuit Design
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced Polymer Synthesis and Characterization
- Advanced Sensor and Energy Harvesting Materials
- Advanced Battery Technologies Research
- Photonic and Optical Devices
- Polymer Surface Interaction Studies
- Analog and Mixed-Signal Circuit Design
- Supercapacitor Materials and Fabrication
- Semiconductor Lasers and Optical Devices
- Polymer composites and self-healing
- Conducting polymers and applications
- Advanced battery technologies research
- biodegradable polymer synthesis and properties
- Dielectric materials and actuators
- Electromagnetic Compatibility and Noise Suppression
- Block Copolymer Self-Assembly
- Pickering emulsions and particle stabilization
- Advanced Materials and Mechanics
- Low-power high-performance VLSI design
- Polymer crystallization and properties
- Fuel Cells and Related Materials
- Radioactive element chemistry and processing
Zhejiang University
2016-2025
State Key Laboratory of Clean Energy Utilization
2020-2025
Baidu (China)
2025
State Key Laboratory of Chemical Engineering
2015-2024
Jiaxing University
2024
Harbin Institute of Technology
2023-2024
China National Petroleum Corporation (China)
2024
Zhejiang Energy Group (China)
2024
University of Delaware
2024
Shanghai Jiao Tong University
2023
This paper presents a 2.2-GHz low jitter sub-sampling based PLL. It uses phase-detector/charge-pump (PD/CP) that sub-samples the VCO output with reference clock. In contrast to what happens in classical PLL, PD/CP noise is not multiplied by <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">N</i> <sup xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> this resulting contribution from PD/CP. Moreover, no frequency divider needed locked state and hence...
Abstract Properties of emulsions highly depend on the interdroplet interactions and, thus, engineering at molecular scale are essential to achieve desired emulsion systems. Here, attractive Pickering gels (APEGs) designed and prepared by bridging neighboring particle‐stabilized droplets via telechelic polymers. In APEGs, each molecule with two amino end groups can simultaneously bind carboxyl functionalized nanoparticles in droplets, forming a bridged network. The APEG systems show typical...
Carbon dioxide (CO2) is the primary greenhouse gas contributing to anthropogenic climate change which associated with human activities. The majority of CO2 emissions are results burning fossil fuels for energy, as well industrial processes such steel and cement production. capture, utilization, storage (CCUS) a sustainable technology promising in terms reducing that would otherwise contribute change. From this perspective, discussion on carbon capture focuses chemical absorption technology,...
Multiple degrees of freedom (DOFs) motion manipulation various objects is a crucial skill for robotic systems, which relies on hands. However, traditional hands suffer from problems low accuracy, poor electromagnetic compatibility and complex system due to limitations in structures, principles transmissions. Here we present direct-drive rigid piezo hand (PRH) constructed functional piezoelectric ceramic. Our PRH holds four fingers twelve DOFs. It achieves high adaptability ten employing...
This brief analyzes the jitter as well power dissipation of phase-locked loops (PLLs). It aims at defining a benchmark figure-of-merit (FOM) that is compatible with well-known FOM for oscillators but now extended to an entire PLL. The phase noise generated by thermal in oscillator and loop components calculated. estimated, focusing on required dynamic power. absolute PLL output calculated, optimum bandwidth gives minimum derived. shown that, steep enough input reference clock, this <i...
The chain sequence of a poly(styrene-co-methyl acrylate) copolymer is designed to form V-shaped gradient via controlled/living radical emulsion copolymerization. This specially gives this common the capacity multishape memory. can sequentially recover its permanent shape from three or more previously programmed temporary shapes with stimulus temperature. As service our authors and readers, journal provides supporting information supplied by authors. Such materials are peer reviewed may be...
This paper presents phase-locked loop (PLL) reference-spur reduction design techniques exploiting a sub-sampling phase detector (SSPD) (which is also referred to as sampling detector). The VCO sampled by the reference clock without using frequency divider and an amplitude controlled charge pump used which inherently insensitive mismatch. main remaining source of spur periodic disturbance at frequency. underlying mechanisms are analyzed their effect minimized dummy samplers isolation buffers....
Abstract Large volume change, poor conductivity, and electrolyte soluble active materials intermediates have long been daunting challenges for sulfur, silicon, silicon oxides electrode materials. A self‐healable polyelectrolyte binder is exploited by crosslinking polydopamine, phytic acid poly(acrylamide‐ co ‐2‐(Dimethylamino)ethyl acrylate) in situ at room temperature through reconfigurable hydrogen bonds ionic bonds. Therefore, the crosslinked network can readily recover its mechanical...
Abstract Metallic Lithium deposited on graphite particles is the major phenomenon responsible for degradation of cell capacity, triggering internal short circuit (ISC), and exacerbating thermal runaway (TR) in lithium‐ion batteries (LIBs). However, currently, no available physics‐based model can provide an accurate quantitative description lithium‐plating behavior. Herein, this work establishes a mechanism to characterize Li deposition‐stripping process, especially formation dead...
High-performance phase-locked-loops (PLLs) are key building blocks for many modern ICs. The sub-sampling PLL proposed in [1] uses a reference clock REF to sample high-frequency VCO and converts phase/timing error into voltage. steep dv/dt slope of the helps realize high phase-detection gain greatly suppresses noise loop components succeeding phase detector, leading low in-band good Figure-Of-Merit (FOM). However, original design is analog limited integer-N (int-N) operation. It desirable...
Abstract Lithium–sulfur batteries (LSBs) can work at high temperatures, but they suffer from poor cycle life stability due to the “shuttle effect” of polysulfides. In this study, pollen‐derived porous carbon/cuprous phosphide (PC/Cu 3 P) hybrids were rationally synthesized using a one‐step carbonization method pollen as source material, acting sulfur host for LSBs. hybrid, polar Cu P markedly inhibit by regulating adsorption ability toward polysulfides, confirmed theoretical calculations and...
The lithium sulfur battery is an attractive energy storage device because of its high theoretical capacity and density, but lifetime seriously limited by the shuttle effect polysulfides. Herein, a rational design vertical MoS2 nanosheets anchored on conductive carbon nanotubes through Mo–O–C covalent coupling proposed. In this composite, strong chemical interaction ensures rapid charge transfer at interfaces, while sulfur-deficient metallic 1T phase-containing enhances affinity with...
The thermoresponsive PEG-based copolymer poly[2-(2-methoxyethoxy)ethyl methacrylate-co-oligo(ethylene glycol) methacrylate) (P(MEO2MA-co-OEGMA)] was grafted onto a silicon wafer, and its chain conformation in aqueous solution studied by neutron reflectometry. effects of temperature salt concentration on the polymer's were evaluated. With increasing temperature, it found that polymer brushes underwent transition from an extended state to compressed state, eventually collapsed above lower...
High internal phase emulsion (HIPE) living polymerization was proposed in current work. Reversible addition-fragmentation chain transfer (RAFT), one of the radical methods, introduced to HIPE for preparation polystyrene PolyHIPEs. Living changed crosslinking process giving a highly homogeneous polymeric wall The resolving heterogeneity problem increased mechanical strength PolyHIPEs significantly with Young's modulus reaching theoretical value ∼45 MPa, which more than 3 times higher that by...
Surface-initiated controlled radical polymerization has been widely used for grafting polymers from various surfaces. However, how the surface-constrained radicals are terminated remains to be further elucidated. In this work, a simple kinetic model is developed surface-initiated atom transfer (SI-ATRP) with addition of excess deactivator in solution. The describes development polymer layer thickness, as well concentrations radical, dormant and dead chains. A but accurate analytical solution...
Shield tunnel damage induced by excessive and differential displacement has become a major threat to the operational safety of urban subways in China. Grouting offers an effective way reduce ensure structural damaged shield tunnels. In this paper, case study on remediation Shenzhen, China, grouting is presented. The drop groundwater level caused nearby foundation excavation was main reason for damage. outside selected considering site conditions construction time limitations. An automatic...
Biological muscles are composed of aligned actuatable fiber units to generate directional linear output, inspiring the design microstructures in artificial muscles. However, synthetic soft elastomers generally possess isotropic mechanical properties; therefore, a promising muscle (dielectric elastomer actuator) outputs nondirectional force or deformation. In this work, we report muscle-mimetic anisotropic dielectric with output driven by electric field. The millimeter-in-diameter fibers...