21 Result(s)
within
**n-Qiang Guo
Nanotechnology
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Article
Effects of Surface Roughness on Interface Bonding Performance for 316H Stainless Steel in Hot-Compression Bonding
The metallurgical bonding quality of bonding joints is affected by the substrate surface state in hot-compression bonding (HCB), and the surface roughness is a core indicator of the surface state. However, the...
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Article
Open AccessCoassembly of hypoxia-sensitive macrocyclic amphiphiles and extracellular vesicles for targeted kidney injury imaging and therapy
Hypoxia is a major contributor to global kidney diseases. Targeting hypoxia is a promising therapeutic option against both acute kidney injury and chronic kidney disease; however, an effective strategy that ca...
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Article
Direct synthesis of L10-FePt nanoparticles from single-source bimetallic complex and their electrocatalytic applications in oxygen reduction and hydrogen evolution reactions
L10-FePt nanoparticles (NPs) with high chemical ordering represent effective electrocatalysts to reduce the cost and enhance their catalytic performance in fuel cells. A molecular strategy of preparing highly ord...
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Open AccessAnomalous Mode Transitions in High Power Distributed Bragg Reflector Quantum Cascade Lasers
In this paper, an anomalous spectral data of distributed Bragg reflector (DBR) quantum cascade lasers (QCLs) emitting around 7.6 μm is presented. The two-section DBR lasers, consisting of a gain section and an...
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Open AccessDemonstration of High-Power and Stable Single-Mode in a Quantum Cascade Laser Using Buried Sampled Grating
High-power, low-threshold stable single-mode operation buried distributed feedback quantum cascade laser by incorporating sampled grating emitting at λ ~ 4.87 μm is demonstrated. The high continuous wave (CW) out...
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Article
Young’s Modulus Enhancement and Measurement in CNT/Al Nanocomposites
Young’s modulus is a critical parameter for designing lightweight structure, but Al and its alloys only demonstrate a limited value of 70–72 GPa. The introduction of carbon nanotubes (CNTs) is an effective way...
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Article
Open AccessTapered Quantum Cascade Laser Arrays Integrated with Talbot Cavities
Power scaling in broad area quantum cascade laser (QCL) usually leads to the deterioration of the beam quality with an emission of multiple lobes far-field pattern. In this letter, we demonstrate a tapered QCL...
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Article
Characterization of Interfacial Bonding Mechanism for Graphene-Modified Powder Metallurgy Nickle-Based Superalloy
A modified FGH96 superalloy using 0.1 wt% graphene was successfully prepared using the wet mixing method. The interfacial bonding mechanism between the graphene and the superalloy matrix was characterized usin...
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Article
Open AccessStable Single-Mode Operation of Distributed Feedback Quantum Cascade Laser by Optimized Reflectivity Facet Coatings
In this work, quantum cascade lasers (QCLs) based on strain compensation combined with two-phonon resonance design are presented. Distributed feedback (DFB) laser emitting at ~ 4.76 μm was fabricated through a...
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Article
Open AccessLow Power Consumption Substrate-Emitting DFB Quantum Cascade Lasers
In the present work, an ultra-low power consumption substrate-emitting distributed feedback (DFB) quantum cascade laser (QCL) was developed. The continuous-wave (CW) threshold power dissipation is reduced to 0...
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Article
Open AccessBipolar Resistive Switching Characteristics of HfO2/TiO2/HfO2 Trilayer-Structure RRAM Devices on Pt and TiN-Coated Substrates Fabricated by Atomic Layer Deposition
The HfO2/TiO2/HfO2 trilayer-structure resistive random access memory (RRAM) devices have been fabricated on Pt- and TiN-coated Si substrates with Pt top electrodes by atomic layer deposition (ALD). The effect of ...
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Article
Open AccessHigh Efficiency, Low Power-Consumption DFB Quantum Cascade Lasers Without Lateral Regrowth
Very low power-consumption distributed feedback (DFB) quantum cascade lasers (QCLs) at the wavelength around 4.9 μm were fabricated by conventional process without lateral regrowth of InP:Fe or using sidewall ...
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Open AccessSynaptic Plasticity and Learning Behaviors Mimicked in Single Inorganic Synapses of Pt/HfOx/ZnOx/TiN Memristive System
In this work, a kind of new memristor with the simple structure of Pt/HfOx/ZnOx/TiN was fabricated completely via combination of thermal-atomic layer deposition (TALD) and plasma-enhanced ALD (PEALD). The synapti...
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Article
Open AccessA Polarization-Dependent Normal Incident Quantum Cascade Detector Enhanced Via Metamaterial Resonators
The design, fabrication, and characterization of a polarization-dependent normal incident quantum cascade detector coupled via complementary split-ring metamaterial resonators in the infrared regime are presen...
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Article
Open AccessNormal Incident Long Wave Infrared Quantum Dash Quantum Cascade Photodetector
We demonstrate a quantum dash quantum cascade photodetector (QDash-QCD) by incorporating self-assembled InAs quantum dashes into the active region of a long wave infrared QCD. Sensitive photoresponse to normal...
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Article
Plasmon Resonances in a Stacked Pair of Periodic Graphene Hole Arrays
In this paper, we investigate the plasmon resonances in a stacked pair of periodic graphene hole arrays by using charge oscillation picture. It is found that the plasmon resonances can be controlled by changin...
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Article
Open AccessThe Antibacterial Activity of Ta-doped ZnO Nanoparticles
A novel photocatalyst of Ta-doped ZnO nanoparticles was prepared by a modified Pechini-type method. The antimicrobial study of Ta-doped ZnO nanoparticles on several bacteria of Gram-positive Bacillus subtilis (B....
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Article
Open Access10-W pulsed operation of substrate emitting photonic-crystal quantum cascade laser with very small divergence
High-power broad area substrate emitting photonic-crystal distributed feedback (DFB) quantum cascade lasers (QCLs) emitting around 4.73 μm is reported. Two-dimensional centered rectangular photonic-crystal (CR...
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Article
Magnetic-field induced anisotropy in electromigration behavior of Sn–Ag–Cu solder interconnects
Sn–Ag–Cu solder interconnects were made by solidifying the solder balls in a magnetic field and subsequently tested for their electromigration behavior. The orientation of the tin grains was analyzed by electr...
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Article
Open AccessExcellent resistive switching properties of atomic layer-deposited Al2O3/HfO2/Al2O3 trilayer structures for non-volatile memory applications
We have demonstrated a flexible resistive random access memory unit with trilayer structure by atomic layer deposition (ALD). The device unit is composed of Al2O3/HfO2/Al2O3-based functional stacks on TiN-coated ...
