Results 101 to 110 of about 201,281 (284)

Dual Band Deep Ultraviolet AlGaN Photodetectors [PDF]

, 2007
We report on the design, fabrication and characterization of a back-illuminated voltage bias selectable dual-band AlGaN UV photodetector. The photodetector can separate UVA and W-B band radiation by bias switching a two terminal n-p-n homojunction ...
Aslam, S., Franz, D., Gaska, R., Guan, B., Miko, L., Pugel, D., Stahle, C., Zhang, J. P.   +7 more
core   +1 more source

Fixed points of quantum gravity in extra dimensions

, 2006
We study quantum gravity in more than four dimensions with renormalisation group methods. We find a non-trivial ultraviolet fixed point in the Einstein-Hilbert action.
Aida, Ambjorn, Ambjorn, Antoniadis, Antoniadis, Arkani-Hamed, Arkani-Hamed, Bergerhoff, Bergerhoff, Berges, Bonanno, Branchina, Christensen, Daniel F. Litim, Forgacs, Freire, Gastmans, Gies, Giudice, Hamber, Hamber, Hamber, Hamber, Herbut, Kawai, Kazakov, Lauscher, Lauscher, Lauscher, Litim, Litim, Litim, Litim, Litim, Litim, Litim, Litim, Litim, Litim, Litim, Litim, Morris, Niedermaier, Niedermaier, Pawlowski, Pawlowski, Pawlowski, Pawlowski, Pawlowski, Percacci, Percacci, Percacci, Peter Fischer, Polonyi, Randall, Randall, Reuter, Reuter, Reuter, Souma, Souma, Weinberg   +61 more
core   +1 more source

Shaped ultrafast laser pulses in the deep ultraviolet

Optics Express, 2007
We use an acousto-optic pulse shaper to directly control the phase and amplitude of femtosecond laser pulses in the deep ultraviolet (~ 260 nm). The efficiency of the pulse shaper is 21% and the output pulse energy is 2.8muJ. We are currently using these pulses in molecular coherent control experiments.
Brett J, Pearson, Thomas C, Weinacht
openaire   +2 more sources

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

Advanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian, Jingkai Lin, Zhihao Tian, Selusiwe Ncube, Huayang Zhang, Emiliano Cortés, Hongqi Sun, Shaobin Wang   +7 more
wiley   +1 more source

Efficient Chiral Ultraviolet and Deep‐Blue Materials for High‐Performance Circularly Polarized OLEDs

Aggregate
High‐performance circularly polarized organic light‐emitting diodes (CP‐OLEDs) with ultraviolet and deep‐blue circularly polarized electroluminescence (CP‐EL) are important for 3D displays, but designing short‐wavelength circularly polarized luminescence
Letian Xu, Yan Li, Hao Liu, Nuoling Qiu, Hui Chen, Yinhao Luo, Heping Shi, Ben Zhong Tang, Zujin Zhao   +8 more
doaj   +1 more source

Substrate Stress Relaxation Regulates Cell‐Mediated Assembly of Extracellular Matrix

Advanced Functional Materials, EarlyView.
Silicone‐based viscoelastic substrates with tunable stress relaxation reveal how matrix mechanics regulates cellular mechanosensing and cell‐mediated matrix remodelling in the stiff regime. High stress relaxation promotes assembly of fibronectin fibril‐like structures, increased nuclear localization of YAP and formation of β1 integrin‐enriched ...
Jonah L. Voigt, Jens Timmer, Elisabetta Ada Cavalcanti‐Adam   +2 more
wiley   +1 more source

Modulating Electrochemical CO2 Reduction Pathways via Interfacial Electric Field

Advanced Functional Materials, EarlyView.
Engineering interfacial electric fields in Cu/ITO electrodes enables precise control of CO2 reduction pathways. Charge transfer from Cu to ITO generates positively charged Cu species that steer selectivity from ethylene toward methane. This work demonstrates how interfacial electric‐field modulation can direct reaction intermediates and transform ...
Mahdi Salehi, Zhengyuan Gao, Sai Phani Kumar Vangala, Amirhossein Farzi, Hamed Heidarpour, Morgan McKee, Nikolay Kornienko, Ali Seifitokaldani   +7 more
wiley   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

High-Energy, Multicolor Femtosecond Pulses from the Deep Ultraviolet to the Near Infrared Generated in a Hydrogen-Filled Gas Cell and Hollow Fiber

Applied Sciences, 2014
We investigate four-wave mixing in hydrogen gas using a gas cell and a hollow fiber for the generation of high-energy, multicolor femtosecond (fs) optical pulses.
Kazuya Motoyoshi, Yuichiro Kida, Totaro Imasaka   +2 more
doaj   +1 more source