Results 81 to 90 of about 110,088 (300)

Effectiveness of Second-generation Light-emitting Diode (LED) Light Curing Units

The Journal of Contemporary Dental Practice, 2007
Abstract Aim The purpose of this study was to evaluate the effectiveness of three commercially available light emitting diode (LED) light curing units (LCU) (Elipar FreeLight - 3M ESPE; UltraLume LED2 - Ultradent; and Single V - BioArt) for polymerizing Z250-A3 composite (3M ESPE) using Knoop hardness, polymerization depth, and flexural strength ...
Ulisses Bastos, Campregher, Susana Maria Werner, Samuel, Carmen Beatriz Borges, Fortes, Alberth David Correa, Medina, Fabricio Mezzomo, Collares, Fabricio Aulo, Ogliari   +5 more
openaire   +2 more sources

Ultrastable Photoactive Halide Perovskite Nanocrystal‐Sensitized SnO2 Nanorods for Room‐Temperature NO2 Detection

Advanced Functional Materials, EarlyView.
ABSTRACT Metal oxide (MOx)‐based NO2 gas sensors typically require high temperatures or ultraviolet light, limiting their practical use. To enable visible‐light activation at room temperature, efficient and stable photosensitizers should be integrated with nanostructured MOx hosts.
Yeonji Yuk, Dokyum Kim, Jun‐Cheol Park, Yoonsung Jung, Inhyeok Oh, Donghyeon Lee, Yejoon Kim, Ji‐Eun Yeo, Young Min Song, Chang‐Lyoul Lee, Sanghan Lee   +10 more
wiley   +1 more source

III-Nitride Multi-Quantum-Well Light Emitting Structures with Selective Carrier Injection

Applied Sciences, 2019
Incorporation into the multi-layered active region of a semiconductor light-emitting structure specially designed intermediate carrier blocking layers (IBLs) allows efficient control over the carrier injection distribution across the structure’s ...
Hussein S. El-Ghoroury, Mikhail V. Kisin, Chih-Li Chuang   +2 more
doaj   +1 more source

On the Performance of Single- and Multi-carrier Modulation Schemes for Indoor Visible Light Communication Systems

, 2015
In this paper, we investigate and compare the performance of single- and multi-carrier modulation schemes for indoor visible light communication (VLC).
Aminikashani, Mohammadreza, Kavehrad, Mohsen   +1 more
core   +1 more source

INFLUENCE OF LIGHT EMITTING DIODE (LED) ON MICROALGAE

Journal of Chemical Engineering and Industrial Biotechnology, 2020
There are 150,000 microalgae species. Scientists identified and classified 30,000 species. Only 10–15 species are utilised and studied for wastewater treatment, biogas upgrading, biomass production, and lipid content. LED can raise microalgae performance to the highest.
Sajjad Al-amshawee, Mohd Yusri Bin Mohd Yunus   +1 more
openaire   +2 more sources

Quasi‐Static to Supersonic Energy Absorption of Nanoarchitected Tubulanes and Schwarzites

Advanced Functional Materials, EarlyView.
Nanoarchitected energy‐absorptive Tubulanes exhibit record energy absorption under quasi‐static conditions and exceptional inelastic energy dissipation under 750 m s−1 ballistics impact, with high performance spanning strain rates of 12 orders of magnitude.
Peter Serles, Alianna Maguire, Thomas Butruille, Jet Lem, Shuo Yang, Pedro Guerra Demingos, Sahar Choukir, Michel Haché, Boran Kumral, Katherine Jia, Charles Jia, Yu Zou, Chandra Veer Singh, Carlos M. Portela, Jun Lou, Pulickel M. Ajayan, Tobin Filleter   +16 more
wiley   +1 more source

Curing efficiency of three light emitting diode units at different curing profiles

Indian Journal of Dental Research, 2016
Context: High-intensity light emitting diode lamps with reduced exposure time to bond orthodontic attachments have been introduced to save the valuable clinical time. Aims: To evaluate the shear bond strength of brackets cured using three different light
Priyanka Verma
doaj   +1 more source

Deciphering Small Molecule Diffusion Parameters Across Light Responsive Polymersome Membranes

Advanced Functional Materials, EarlyView.
Light‐responsive polymersomes bearing donor–acceptor Stenhouse adducts (DASAs) enable programmable control over small‐molecule transport across synthetic membranes. By systematically varying DASA density, an optimal functionalization regime is identified that maximizes light‐gated permeability.
Farzina Matubbar, Beyzanur Kaya, Buse Ipek, Tenzin Dorjee, Shoghik Hakobyan, Mohamed Chami, Julien E. Gautrot, Omar Rifaie‐Graham   +7 more
wiley   +1 more source

Investigation into Using Compensation for the Nonlinear Effects of the Output of LEDs in Visible Light Communication Systems [PDF]

, 2019
This paper investigate the effects of the nonlinear output power to the input current transfer function of a light emitting diode (LED) used as the transmitter in visible light communication systems, and proposes a compensation technique to mitigate the ...
Burton, Andrew, Ghassemlooy, Zabih, Haigh, Paul Anthony, Le Minh, Hoa, Li, Xicong, Zvánovec, Stanislav   +5 more
core   +2 more sources

Bio‐Inspired Magnetically Tunable Structural Colors from Elliptical Self‐Assembled Block Copolymer Microparticles

Advanced Functional Materials, EarlyView.
Cephalopod‐inspired photonic microparticles with dynamic structural coloration are fabricated via confined self‐assembly of linear block copolymers into ellipsoids containing stacked lamellae. Embedded superparamagnetic nanoparticles enable rapid magnetic alignment, restoring vivid, angle‐dependent color.
Gianluca Mazzotta, Simone Bertucci, Jose Mendoza‐Carreño, Agustín Mihi, Paola Lova, Davide Comoretto, Ullrich Steiner, Marco Lattuada, Andrea Dodero   +8 more
wiley   +1 more source