Results 161 to 170 of about 304 (214)

Low‐Temperature Gold Deposition Improves CdTe Back Contacts

Advanced Materials Interfaces, EarlyView.
Cd(Se,Te) samples are cooled during the evaporation of Au back contacts to thermally quench CdTe degradation. Reduced temperature during Au evaporation boosts PV efficiency, open‐circuit voltage, and fill factor. XPS associates these improvements with less chemical perturbation of the CdTe surface during metallization.
Christopher P. Muzzillo, Ryan Muzzio, Craig L. Perkins, B. Edward Sartor, Matthew O. Reese, Chungho Lee   +5 more
wiley   +1 more source

Enhanced Photostability and Reduced Burn‐In Losses in Organic Solar Cells via a 2PACz‐Modified PEDOT:PSS Hole Transport Layer

Advanced Materials Interfaces, EarlyView.
A PEDOT:PSS/2PACz hole transport layer reduces burn‐in degradation and enhances the photostability of organic solar cells. The interfacial modification with 2PACz mitigates photo‐induced interfacial disorder, enabling stable power conversion efficiencies under continuous illumination for over 650 h.
Julia Hönigsberger, Lakshmi Rajan, Egon Pavlica, Anto Vrbat, Thomas Griesser, Lukas Troi, Konrad Binter, Gregor Trimmel, Thomas Rath   +8 more
wiley   +1 more source

Chaotropic Surface Arginine Correlates With Protein Corona Formation on Anti‐Fouling Biomaterial Surfaces: A Quantitative Proteomics and Protein Structure Study

Advanced Materials Interfaces, EarlyView.
Why do specific proteins accumulate on “non‐fouling” surfaces? Quantitative proteomics and structural analysis reveal surface‐exposed arginine as the key molecular determinant. ABSTRACT The protein corona determines the biocompatibility of medical devices, yet predicting its composition on anti‐fouling surfaces remains challenging.
Ayano Nomura, Guanghao Hu, Ang Art Wei Yao, Chisato Komura, Hideharu Kurioka, Tomohiro Hayashi   +5 more
wiley   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Nanoporous Silica Embedded in Nanoporous Platinum: A Versatile Composite Coating for Implant‐Associated Drug Delivery From Neuronal Electrodes

Advanced Materials Technologies, EarlyView.
Nanoporous silica nanoparticles incorporated in nanoporous platinum offer the possibility for implant‐associated drug delivery from neuronal electrodes. ABSTRACT Sensorineural hearing loss, resulting from damage to the hair cells of the inner ear, profoundly impairs quality of life.
Mosaieb Habib, Tim‐Joshua Strauß, Jennifer Harre, Madeleine Goblet, Florian Klodwig‐Kirstein, Jana Schwieger, Michaela Kreienmeyer, Verena Scheper, Athanasia Warnecke, Nina Ehlert, Peter Behrens   +10 more
wiley   +1 more source

Testing and Simulation of Multilayer Polyvinylidene Fluoride‐Based Piezoelectric Energy Harvester Devices

Advanced Materials Technologies, EarlyView.
The study considers the use of polymer/dielectric‐based multilayers piezoelectric Energy Harvesters (EH) to produce an output voltage and current, by exploiting the mechanical energy provided by human organs movements. In particular, the heart motion is considered from the kinematic viewpoint, and a multiphysics theoretical model is developed to assess
Hamdi Ezzin, Silvia Monchetti, Paolo Emilio Puddu, Luciano Teresi, Antonio DeSimone, Roberto Brighenti   +5 more
wiley   +1 more source

Programmable Pneumatic Actuator System for a Bioinspired Artificial Colon

Advanced Materials Technologies, EarlyView.
A modular soft robotic colon simulator driven by programmable pneumatic actuation is developed to mimic physiological and pathological‐like motility patterns of the large intestine. Finite element–guided design and distributed control enable anatomically realistic deformation for peristalsis, segmentation, and mass movements, supporting capsule ...
Andrew Bickerdike, Bo Tian, Xizheng Fang, Zepeng Wang, Yang Liu, Lucy Adams, Shyam Prasad   +6 more
wiley   +1 more source

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On the Summability of Power Series

Proceedings of the London Mathematical Society, 1932
The author \(1^\circ\) gives a necessary and sufficient condition for the summability \((C, \gamma)\) of the power series \(f(z) =\sum a_nz^n\), \(a_n =o(n^\gamma)\) \((\gamma > -1)\) on the circle \(| z| = 1\), \(2^\circ\) applies the condition to obtain some (mostly known) theorems on the summability of power series, bounded (or even satisfying a ...
openaire   +4 more sources

The Summability of Fourier Series

The Mathematical Gazette, 1931
One of the oldest problems in the theory of Fourier series is that of looking for a criterion that a Fourier series shall converge. No one, however, has been able to find a simple, necessary and sufficient condition for this. Thus, for instance, bounded variation of the function is sufficient but not necessary.
openaire   +1 more source

On Strong Summability of Fourier Series of Summable Functions

Ukrainian Mathematical Journal, 2000
Summary: In the metric of \(L\) we obtain estimates for the generalized means of deviations of partial Fourier sums from an arbitrary summable function in terms of the corresponding means of its best approximations by trigonometric polynomials.
openaire   +2 more sources