A5100337920- Electromagnetic Launch and Propulsion Technology
- Energetic Materials and Combustion
- Structural Integrity and Reliability Analysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Arctic and Antarctic ice dynamics
- Fatigue and fracture mechanics
- High Entropy Alloys Studies
- Additive Manufacturing Materials and Processes
- Plasma Diagnostics and Applications
- High-Velocity Impact and Material Behavior
- Ship Hydrodynamics and Maneuverability
- Combustion and Detonation Processes
- Arctic and Russian Policy Studies
- Maritime Transport Emissions and Efficiency
- Fluid Dynamics Simulations and Interactions
- Coal and Its By-products
- Plasmonic and Surface Plasmon Research
- Photonic Crystals and Applications
- Fluid Dynamics and Turbulent Flows
- Aluminum Alloys Composites Properties
- Icing and De-icing Technologies
- Hydrogen embrittlement and corrosion behaviors in metals
- Particle accelerators and beam dynamics
- Aerodynamics and Acoustics in Jet Flows
- High-Temperature Coating Behaviors
China University of Petroleum, Beijing
2023-2025
Chalmers University of Technology
2013-2024
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
2023-2024
Southeast University
2021-2024
Sun Yat-sen University
2024
Southwest Petroleum University
2023-2024
Kyushu University
2023-2024
East China Normal University
2024
City University of Hong Kong
2024
Logistics University of People's Armed Police Force
2023
This paper describes a facile method for generating Au@Ag core−shell nanocubes with edge lengths controllable in the range of 13.4−50 nm. The synthesis involved use single-crystal, spherical Au nanocrystals 11 nm size as seeds an aqueous system, ascorbic acid serving reductant and cetyltrimethylammonium chloride (CTAC) capping agent. thickness Ag shells could be finely tuned from 1.2 to 20 by varying ratio AgNO3 precursor seeds. We also investigated growth mechanism examining effects (capped...
Silver nanocubes dispersed in water were transformed into Pd−Ag or Pt−Ag nanoboxes by adding either Na2PdCl4 Na2PtCl4. By controlling the amount of noble metal salt added, and therefore molar ratio Na2PtCl4 to Ag, we could tune surface plasmon resonance peak nanostructures across entire visible spectrum, from 440 730 nm. Replacement Ag with Pd resulted formation a nanobox composed alloy single crystal, but formed after replacement Pt was instead distinct nanoparticles. DDA calculations...
Gold−silver alloy nanocages with controllable pores on the surface have been synthesized via galvanic replacement reaction between truncated Ag nanocubes and aqueous HAuCl4. Unlike in previous studies, initiation of started a way, simultaneously from eight corners where {111} facets were exposed. The formation cubic at all was determined by capping agent, poly(vinyl pyrrolidone) (PVP), which preferentially covered {100} nanocube.
This paper describes a two-step procedure for generating cubic nanocages and nanoframes. In the first step, Au/Ag alloy nanoboxes were synthesized through galvanic replacement reaction between Ag nanocubes an aqueous HAuCl4 solution. The second step involved selective removal (or dealloying) of from with etchant based on Fe(NO3)3 or NH4OH. use wet other than dealloying process allows one to better control wall thickness porosity resultant because there is no concurrent deposition Au. By...
Silver nanocubes with sharp or truncated corners were synthesized, deposited on silicon substrates, and functionalized Raman-active thiols for surface-enhanced Raman scattering (SERS) studies. The use of substrates registration marks allowed us to correlate the SERS spectra from individual their physical parameters revealed by high-resolution SEM imaging. We observed dramatic variations in intensity when oriented at different angles relative polarization excitation laser. This angular...
A simple and robust route is described to the synthesis of single‐crystal Au nanospheres with diameters controlled in range 5 nm 150 nm. The success this relies on use spheres different as seeds for successive growth a slow injection rate precursor enable surface diffusion atoms added onto seed. could be precisely by varying size and/or number seeds. products exhibit excellent uniformity terms both shape they are expected find widespread applications, including self‐assembly, fabrication...
A hierarchical nanoparticle strategy to simultaneously gain super Raman signal amplification, high uniformity, and reproducibility is presented. Using hollow Au-Ag alloy nanourchins, an ultrahigh sensitivity, e.g., down 1 fM concentrations for DEHP molecule obtained. small standard deviation of <10% achieved by simply dropping evaporating sub-100 nm nanourchins onto a substrate. As service our authors readers, this journal provides supporting information supplied the authors. Such materials...
Here we report the synthesis of Pd@Cu core-shell nanocubes via epitaxial growth, where lattice mismatch is 7.1%. The involved use Pd seeds with different shapes (including cubes, cuboctahedra, and octahedra) for growth Cu shells. Different from conventional mode, atoms initially nucleated only on a few many faces seed, onto which more were continuously added to generate blocks. Later, also started nucleate grow other seed until entire surface was covered by shell. As result, rarely located...
Novel surface-enhanced Raman scattering (SERS) substrates with high SERS-activity are ideal for novel SERS sensors, detectors to detect illicitly sold narcotics and explosives. The key the wider application of technique is develop plasmon resonant structure geometries enhance signals control periodic ordering these structures over a large area obtain reproducible enhancement. In this work, simple Ar+-ion sputtering route has been developed fabricate silver nanoneedles arrays on silicon...
Colloidal metal nanoparticles have unique surface plasmon resonance (SPR) properties for applications in optics, medicine, photocatalysis, and photovoltaics. In this work, we use the Mie theory to investigate SPR of bimetallic core–shell having a spherical shape consisting Drude metals. We find that there exists special mode whose energy is concentrated at interface between core shell, call it extraordinary mode. This can interact with conventional outer nanoparticle, which called ordinary...
The construction of an electrochromic supercapacitor device (ESD) with multicolor change, good energy storage capacity, cyclic stability, and the realization quantitative monitoring level (ESL) ESD are very important to realize practical application device. In this study, poly(indole-5-carboxylic acid)/WO3 (P5ICA/WO3) nanocomposites supercapacitive properties successfully prepared. color P5ICA/WO3 can be reversibly changed among blue-green, yellow, dark green. specific capacitance prepared...
We systematically investigate lensing of electromagnetic waves by a negative refractive-index material slab constructed from two-dimensional photonic crystal with properly designed equifrequency-surface configuration [Luo et al., Phys. Rev. B 65, 201104 (2002)]. find that point source placed in the vicinity can form good-quality image opposite side slab. However, is strongly confined near-field region and gradually degrades disappears when moved beyond domain. In addition, image-slab...
We have synthesized Au@Ag core-shell nanocubes containing Au cores with varying shapes and sizes through modified seed-mediated methods. Bromide ions are found to be crucial in the epitaxial growth of Ag atoms onto formation shell's cubic shape. The exhibit very abundant distinct localized surface plasmon resonance (LSPR) properties, which core-shape size-dependent. With help theoretical calculation, physical origin mode profile each LSPR peak identified studied. nanocrystals shaped offer a...
Abstract Surface-enhanced Raman scattering technique, as a powerful tool to identify the molecular species, has been severely restricted noble metals. The surface-enhanced substrates based on semiconductors would overcome shortcomings of metal and promote development technique in surface science, spectroscopy, biomedicine studies. However, detection sensitivity enhancement effects semiconductor are suffering from their weak activities. In this work, Nb 2 O 5 is reported new candidate for...
Introduction: The porcine nerve-derived extracellular matrix (ECM) fabricated as films has good performance in peripheral nerve regeneration. However, when constructed conduits to bridge defects, ECM lacks sufficient mechanical strength. Methods: In this study, a novel electrospun bilayer-structured conduit (BNC) with outer poly (L-lactic acid-co-ε-caprolactone) (PLA-PCL) and inner was for composition, structure, strength of BNC were characterized. Then biosafety evaluated by cytotoxicity,...
Planar nanocrystals with multiple branches exhibit unique localized surface plasmon resonance properties and great promise in optical applications. Here, we report an aqueous synthesis of Pd@AuCu core–shell planar tetrapods through preferential overgrowth on Pd cubic seeds. The large lattice mismatch between the core AuCu shell is key to induce formation under sluggish reduction kinetics. Meanwhile, capping effect cetyltrimethylammonium chloride {100} facets cubes aspect ratio 1.2 can...