Results 191 to 200 of about 8,162,811 (252)

Circularly Polarized Electroluminescence and Spin‐Polarized Carrier Transport in Chiral‐Doped Polymer Films

Advanced Functional Materials, EarlyView.
Chiral dopants induce supramolecular chirality in an achiral polymer (PFO), generating spin‐polarized carriers via the chiral‐induced spin selectivity (CISS) and suggesting a possible contribution of Spin‐polarized carrier transport to circularly polarized electroluminescence (CPEL).
Kazuyuki Asahi, Masashi Hasegawa, Yuuya Nagata, Tamaki Nakano, Hiroyuki Nishikawa   +4 more
wiley   +1 more source

Analog Classification of Human Hand Gestures Exploiting Dendritic Integration With an Organic Artificial Soma

Advanced Functional Materials, EarlyView.
An organic neuromorphic architecture for the classification of human motor behavior is presented and validated. It performs somatic integration by linearly combining the activity from three muscles. An investigation of synaptic weights is presented and discussed in relationship with the classification performance.
Ilenia Sergi, Federico Rondelli, Francesco Torricelli, Federica Velluto, Anna De Salvo, Michele Di Lauro, Luciano Fadiga, Fabio Biscarini   +7 more
wiley   +1 more source

Grayscale Photomasks Enable Noncontact Optical Patterning of Hydroxypropyl Cellulose Gels for Dynamic Art

Advanced Functional Materials, EarlyView.
Mask‐encoded UV exposure translates digital color information into pixel‐resolved structural‐color patterns in hydroxypropyl cellulose gels. Gaussian‐process‐guided calibration links UV processing conditions, wavelength, and mask opacity, enabling parallel fabrication of multicolor images in a single 10 s exposure.
Mengting Ye, Yunyi Zhu, Sai Sabareesh KS, Md Ashiqur Rahman Alif, Yichen Wan, Ruobing Bai, Narges Pourjafarian, Stefanie Mueller, Hongli Zhu   +8 more
wiley   +1 more source

A New Strategy for Creating Quantum Light Emitters Via Post‐Growth Hydrogen‐Ion Irradiation of III‐V Nanowires

Advanced Functional Materials, EarlyView.
A post‐growth method is demonstrated to realize energy‐tunable quantum emitters in GaAs/GaAsN/GaAs core–multishell nanowires on a Si substrate. By combining the N‐induced bandgap reduction with H‐ion irradiation, the GaAsN potential landscape is engineered, enabling isolated, narrow emission lines that function as single‐photon sources with g(2)(0) ∼ 0.
Akant Sagar Sharma, Paolo De Vincenzi, Nadine Denis, Francesca Santangeli, Riccardo Pallucchi, Harikrishnan Gopalakrishnan, Elena Blundo, Antonio Polimeni, Marco Felici, Fumitaro Ishikawa, Marta De Luca   +10 more
wiley   +1 more source

Reversible Calcium Alloying on Bulk and Indium (Sub)‐Micro Negative Electrodes for Calcium‐Based Batteries

Advanced Functional Materials, EarlyView.
Description: Indium metal serves as a reversible calcium‐alloying negative electrode. By transitioning from planar electrodes to powders and (sub‐)micron indium particles, the specific surface area is increased, improving the areal capacity density and cycling stability for calcium‐based batteries.
Wouter Monnens, Robert Markowski, Zhenyu Zhou, Claude Poleunis, Livia Grgurić, Jan Bitenc, Pingping Tan, Han‐Hung Hsu, Alexandru Vlad, Koen Binnemans, Jan Fransaer   +10 more
wiley   +1 more source

Halide Composition Controls Phase Morphology and Device Specific Performance in Perovskite Photovoltaics and Light Emitting Diodes

Advanced Functional Materials, EarlyView.
We demonstrate that halide composition determines phase morphology, governing distinct operating mechanisms in mixed halide perovskites. Phase segregating 75% Br compositions enhance solar cell performance, whereas intrinsically phase‐separated 95% Br compositions provide stable light emitting diodes.
Tal Binyamin, Stav Rahmany, Anat Shvets, Hadar Shema, Elad Gross, Ido Hadar, Lioz Etgar   +6 more
wiley   +1 more source

A New Representation of Power Spectral Density and Correlation Function by Means of Fractional Spectral Moments

Probabilistic Engineering Mechanics, 2010
In this paper, a new perspective for the representation of both the power spectral density and the correlation function by a unique class of function is introduced. We define the moments of order γγ (γ∈Cγ∈C) of the one sided power spectral density and we
Giulio Cottone, Mario di Paola
exaly   +3 more sources

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Power spectral density bounds

IEEE Trans. Inf. Theory, 1984
The determination of a power density spectrum from a finite set of correlation samples is an ill-posed problem. Furthermore. it is not possible even to bound the values that consistent power density spectra can take on at a particular point. A more reasonable problem is to try to determine the total spectral power in some frequency interval.
Thomas L. Marzetta, Stephen W. Lang
openaire   +3 more sources

On the Power Spectral Density of Constrained Sequences

IEEE Transactions on Communications, 2007
This paper derives a simple closed-form expression for computing the power spectral density (PSD) of constrained sequences whose constraints are characterized by a function of an ergodic Markov process specified in terms of a Mealy machine. A suitable matrix description of the stochastic behavior of the constrained sequence is used to express its ...
Cecilio Pimentel, Valdemar Cardoso da Rocha Jr.   +1 more
openaire   +2 more sources

Power Spectral Density: Is It Right?

International Optical Design Conference and Optical Fabrication and Testing, 2010
We concentrate on the instrumental issues surrounding power spectral density (PSD) determination employing Fizeau interferometers. We briefly discuss the properties of an ideal calibration method and some methods that have been used previously.
John P. Lehan, Ulf Griesmann, Jiyoung Chu   +2 more
openaire   +1 more source