Résultats de la recherche - "extraction efficiency"
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Insights Into the Influence of Sidewall Morphology on the Light Extraction Efficiency of Mini-LEDs
Publié 2019-01-01Sujets: “…Light extraction efficiency…”We systemically investigated the influence of sidewall morphology change based on TMAH etching on the optical performance of mini-LEDs. The dominant feature of prism structures on the sidewall of mini-LEDs with TMAH etching treatment varied from inhomogeneous to homogeneous as the TMAH etching time...
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Geographical and temporal variability in the extraction efficiency of bioactive metabolites from Cosmos bipinnatus
Publié 2025-12-01Accéder au texte intégralRuderal plants constitute a promising source of bioactive compounds with nutraceutical and therapeutic potential. In this study, we evaluated the influence of extraction method, geographic origin, and temporal factors on the chemical profile of Cosmos bipinnatus flowers collected from three high val...
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The Impact of Resonance on the Light Extraction Efficiency of Single Nanowire Ultraviolet Light Emitting Diodes
Publié 2020-01-01Sujets: Accéder au texte intégralFabricating the nanowire ultraviolet light emitting diodes (UV LEDs) has been a promising candidate to dramatically enhance the external quantum efficiency (EQE) of UV LEDs. For a great luminescent performance, it is necessary to understand the propagating features of light inside the nanowire. The...
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Extraction efficiency of Graptophyllum pictum: influence of methods and durations on bioactive compound recovery and antioxidant capacity
Publié 2025-07-01Accéder au texte intégralAbstract Graptophyllum pictum, commonly known as daun wungu, is a medicinal plant rich in bioactive compounds with antioxidant properties. This study evaluated the effects of three extraction methods—continuous shaking extraction (CSE), microwave-assisted extraction (MAE), and ultrasonic-assisted ex...
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Improving Carrageenan Extraction Efficiency and Stability Using KOH, NaOH, and Anti-Caking Agents
Publié 2025-05-01Accéder au texte intégralThis study investigates the impact of varying concentrations of potassium hydroxide (KOH) and sodium hydroxide (NaOH), along with anti-caking agents, on the quality of carrageenan extracted from Eucheuma cottonii seaweed. FTIR analysis revealed that KOH-extracted carrageenan retained key functional...
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Enhancing Light Extraction Efficiency in Micro-LEDs via Metal Photonic Crystals in the Passivation Layer and Air Photonic Crystals on the n-GaN Side
Publié 2025-01-01Sujets: Accéder au texte intégralPhotonic crystals (PhCs), as a type of metamaterial, have attracted significant attention due to their ability to control light propagation to enhance the light extraction efficiency (LEE) of Micro-LEDs. However, the current advancements in improving the LEE of Micro-LED with PhCs are far from 100&a...
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Light Extraction Efficiency Analysis of Flip-Chip Ultraviolet Light-Emitting Diodes With Patterned Sapphire Substrate
Publié 2018-01-01Sujets: “…polarization-dependent light extraction efficiency…”This study investigates polarization-dependent light extraction efficiency (<italic>η</italic><sub>extraction </sub>) of AlGaN-based flip-chip ultraviolet (UV) light-emitting diodes (LEDs) emitting at 230 nm and 280 nm with microdome-shaped patterning on...
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Comparison of DNA extraction efficiency between two commercial kits on whole blood, swab, and plasma samples
Publié 2025-07-01Accéder au texte intégralWhole blood, swab, and plasma samples are widely used in molecular biology testing in Vietnam. However, most DNA extraction kits currently in use are imported and rely on silica column technology, which can be challenging to integrate into automated or high-throughput workflows. To address this lim...
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Comparison of DNA extraction efficiency between two commercial kits on whole blood, swab, and plasma samples
Publié 2025-07-01Accéder au texte intégralWhole blood, swab, and plasma samples are widely used in molecular biology testing in Vietnam. However, most DNA extraction kits currently in use are imported and rely on silica column technology, which can be challenging to integrate into automated or high-throughput workflows. To address this lim...
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Studying the solid-liquid extraction of enzyme amylase: influence of type of solvent, temperature, contact time and their interrelationship
Publié 2025-07-01Sujets: Accéder au texte intégralAmylases are one of the most essential and widely used enzymes in a number of industries, including food, fermentation, paper, textile and pharmaceutical. The industrial production of enzyme amylase is carried out using two methods which are submerged fermentation and solid-state fermentation. The i...
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Enhancing Light Extraction Efficiency of Vertical Emission of AlGaN Nanowire Light Emitting Diodes With Photonic Crystal
Publié 2019-01-01“…In this paper, we propose a novel flip-chip AlGaN nanowire LED with top photonic crystals, for the purpose of improving light extraction efficiency (LEE) from top surface. Using three-dimensional finite-difference time domain simulation, we first investigate the LEE in vertical direction of nanowire LEDs. …”AlGaN alloys have been widely used to make ultraviolet light-emitting diodes (UV-LEDs) because its energy bandgap covers 200–360 nm wavelength range. However, AlGaN shows strong transverse magnetic polarization in deep UV range, which severely prevents light extraction from top...
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Enhancing antioxidant extraction efficiency from red dragon fruit peel by green approach using novel optimization technique
Publié 2025-01-01Accéder au texte intégralThis study is the first application of a combined sonication and enzyme extraction technique as green technology to recover biological compounds from the peel of red-fleshed dragon fruit, utilizing Response Surface Methodology (RSM) and Artificial Neural Network-Genetic Algorithm (ANN-GA). The peel...
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Light Extraction Efficiency of GaN-Based Micro-Scale Light-Emitting Diodes Investigated Using Finite-Difference Time-Domain Simulation
Publié 2020-01-01Sujets: Accéder au texte intégralWe conducted a systematic investigation of the light extraction efficiency (LEE) of GaN-based vertical micro-scale light-emitting diode (μ-LED) structures using three-dimensional finite-difference time-domain (FDTD) simulations. The LEE of μ-LED structures was found to have a s...
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The Effect of Sapphire Substrates on Omni-Directional Reflector Design for Flip-Chip Near-Ultraviolet Light-Emitting Diodes
Publié 2019-01-01Sujets: Accéder au texte intégralIn this paper, we investigate the effect of omni-directional reflectors (ODRs) on the light extraction efficiency (LEE) for flip-chip near-ultraviolet light-emitting diodes (LEDs) on patterned (PSS) and flat sapphire substrate (FSS) using three-dimensional finite-difference time-domain method. Diffe...
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Study on Packaging Technology of GAGG:Ce Scintillation Detector
Publié 2025-01-01Sujets:GAGG:Ce scintillation crystal has a wide application prospect in the field of energy spectrum detection, due to its high density, high light yield, radiation resistance and non-deliquination characteristics. The performance of the GAGG:Ce scintillator detector is limited, especially its energy resol...
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Enhancement of Yellow Light Extraction Efficiency of Y <sub>3</sub>Al <sub>5</sub>O <sub>12</sub>:Ce <sup>3+</sup> Ceramic Converters Using a 2-D TiO <sub>2</sub> Hexagonal-Lattice Nanocylinder Photonic Crystal Layer
Publié 2016-01-01Sujets: Accéder au texte intégralThe effects of 2-D hexagonal-lattice TiO <sub>2</sub> photonic crystal layers on the directional light extraction efficiency of low-scattering (Y <sub>1-x</sub>Ce <sub>x</sub>) <sub>3</sub>Al <sub>5</sub>O <sub>12</sub> (YAG:Ce...
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Effects of Inclined Sidewall Structure With Bottom Metal Air Cavity on the Light Extraction Efficiency for AlGaN-Based Deep Ultraviolet Light-Emitting Diodes
Publié 2017-01-01Sujets: Accéder au texte intégralAn inclined sidewall scattering structure with air cavity characterized by a metal bottom and flat parallel top (Bottom_metal) is proposed to enhance the light extraction efficiency (LEE) for AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs). Compared to the reported sidewall metal incli...
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Enhancing Both TM- and TE-Polarized Light Extraction Efficiency of AlGaN-Based Deep Ultraviolet Light-Emitting Diode via Air Cavity Extractor With Vertical Sidewall
Publié 2018-01-01Sujets: Accéder au texte intégralIn this work, we investigate the effect of sidewall angle, height and space of an air cavity extractor (AC-Extractor) on the polarization-dependent light extraction efficiency (LEE) for AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) using three-dimensional finite difference time-domai...
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Innovative Approaches to Extracting Phenolics from <i>Echinacea purpurea</i>: Maximizing Yield and Efficacy
Publié 2025-06-01Sujets: Accéder au texte intégralPeople have long been interested in plants rich in secondary metabolites and have tried to isolate them outside the plants. Purple coneflower is a crucial medicinal plant, known for its broad spectrum of bioactive substances. The type of solvent and the duration of maceration had an important impact...
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Enhanced Output Power of Light-Emitting Diodes With Embedded Air-Gap Photonic Crystals by Nanosphere Lithography
Publié 2017-01-01Sujets: Accéder au texte intégralLarge-scale two-dimensional air-gap photonic crystals (PhCs) were embedded in an n-type GaN layer to enhance the light emission of GaN-based light-emitting diodes (LEDs). The embedded-PhCs were obtained through overgrowth on n-GaN templates, which had air holes array previously fabricated by using n...
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