Results 161 to 170 of about 182,765 (350)

Light-emitting-diode-induced fluorescence detector for capillary electrophoresis using optical fiber with spherical end

, 2003
A simple fluorescence detector for capillary electrophoresis (CE) using a blue light-emitting-diode (LED) as excitation source is constructed and evaluated.
Guan, YF, Yang, BC
core  

Performance of LED-Based Fluorescence Microscopy to Diagnose Tuberculosis in a Peripheral Health Centre in Nairobi.

, 2011
Sputum microscopy is the only tuberculosis (TB) diagnostic available at peripheral levels of care in resource limited countries. Its sensitivity is low, particularly in high HIV prevalence settings. Fluorescence microscopy (FM) can improve performance of
Gagnidze Laramie, Gagnidze, Laramie, Maryline Bonnet, Guérin, P J, Guérin, Philippe Jean, Ramsay, A, Ramsay Andrew, Bonnet, M, Gagnidze, L, Francis Varaine, Githui, W, Guérin Philippe Jean, Githui Willie, Bonte, L, Bonte, Laurence, Varaine, Francis, Bonte Laurence, Guérin, PJ, Laramie Gagnidze, Bonnet, Maryline, Varaine, F, Varaine Francis, Willie Githui, Laurence Bonte, Andrew Ramsay, Philippe Jean Guérin, Ramsay, Andrew, Githui, Willie, Bonnet Maryline   +28 more
core   +1 more source

Sustaining innovative capabilities of light emitting diode (led) manufacturers through dynamic entrepreneurship

Entrepreneurship and Sustainability Issues, 2020
Suhana Mohezar, Ainin Sulaiman, Mohammad Nazri, Safiah Omar   +3 more
doaj   +1 more source

Demonstration of InGaN full-color monolithic micro-LED display using stacking and selective removal of the light-emitting layer

Applied Physics Express
A full-color monolithic micro-light-emitting diode (LED) display based on InGaN quantum wells is demonstrated. We stacked red, green, and blue (RGB) light-emitting layers and selectively removed and regrew a p-type layer to create distinct areas on a ...
Koichi Goshonoo, Koji Okuno, Masaki Ohya
doaj   +1 more source

DEEP ULTRAVIOLET LIGHT EMITTING DIODES (DUV LEDS)

Journal of Engineering Science (Chişinău), 2018
There are a variety of applications for devices that extend into the deep-UV, including biological agent detection and optical storage. The nitride material system is a set of semiconducting compounds that have wavelengths that span a broad range, from yellow to deep-UV. AlGaN has a direct bandgap that extends into the deep-UV range; the device-quality
openaire   +2 more sources

Near‐Unity Chiral Lasing Enabled by Quasi‐Bound States in the Continuum

Advanced Materials, EarlyView.
Nanoimprinted chiral array that supports bound states in the continuum is doped with an efficient non‐chiral molecule (Rhodamine‐B) acting as gain medium to produce fully circularly polarized lasing emission. The chiral lasing wavelength can be tuned across the emission band of Rhodamine‐B by adjusting the coating thickness of the TiO2 high refractive ...
Jose Mendoza‐Carreño, Luis A. Pérez, Carlota Ruiz De Galarreta, Théo Rouanet, M. Isabel Alonso, Agustín Mihi   +5 more
wiley   +1 more source

Bias‐Field Free Single‐Frequency CW‐ODMR of Nitrogen‐Vacancy Centers in Diamond for the Detection of Transient Electrical Signals

Advanced Materials Interfaces, EarlyView.
Simplified quantum sensing technique for the detection of short electrical signals occurring in neuronal signaling or bioinspired technologies. We demonstrate a single frequency continuous‐wave optically detected magnetic resonance (CW‐ODMR) approach to sense signals that can be as short as 0.2 ms.
João Paulo Silva, Orlando D. Cunha, Pedro Magalhães, Filipe Camarneiro, Jana B. Nieder   +4 more
wiley   +1 more source

Magnetic‐Field Modulation of Charge Transport in Non‐Fullerene Semiconductors for Enhanced Hydrogen Evolution

Advanced Materials Interfaces, EarlyView.
ABSTRACT This study demonstrates that weak magnetic fields (16–40 mT) increase the efficiency of the hydrogen evolution reaction (HER) in electrocatalysts based on non‐fullerene acceptor (NFA) derivatives IT‐4Cl and Y6. Electrochemical measurements reveal that the application of the magnetic field reduces the onset potential and increases the current ...
João Paulo Araujo Souza, Marlus Koehler, John Fredy Ricardo Marroquin, Jorlandio Francisco Felix, Thanh‐Tuân Bui, Paulo Eduardo Narcizo de Souza, Sebastião William da Silva, Luana Wouk   +7 more
wiley   +1 more source

Interfacial Electronic Restructuring in MAPbBr3/rGO Hybrids Enabling Improved Charge Extraction for Efficient Photodetection

Advanced Materials Interfaces, EarlyView.
MAPbBr3/rGO hybrids exhibit interfacial electronic restructuring that enhances charge extraction in photodetectors. The incorporation of rGO modifies the surface chemical environment, enhances electron‐dominated transport, and suppresses performance degradation, resulting in higher responsivity, detectivity, and photostability than in pristine MAPbBr3 ...
Mohammed Misbah Uddin, Wisnu Tantyo Hadmojo, Zeyad M. Abdulhamid, Marwa Abd‐Ellah, Ahmed L. Abdelhady   +4 more
wiley   +1 more source

Light emitting diode color rendition properties

Master of ScienceDepartment of Architectural Engineering and Construction ScienceFred L. HaslerThis paper discusses the color rendition capabilities of light emitting diodes (LEDs) and their relationship with the current standard for color rendition ...
Hood, Sean
core