Results 201 to 210 of about 233,265 (291)

Hierarchical Twist: Chirality Across Scales in Cellulose Cholesterics

open access: yesAdvanced Optical Materials, EarlyView.
Hierarchical left‐ and right‐handed chiral nematic structures are observed in a solvent‐free thermotropic cellulose derivative. Free‐standing films show hierarchical twisted structures whose pitches respond differently to uniaxial strain: left‐handed pitches increase, ones decrease.
N. Monge   +7 more
wiley   +1 more source

Ionic Density‐Controlled Conjugated Polyelectrolytes for Interface Engineering in Inverted Colloidal PbS Quantum‐Dots Infrared Photodetector

open access: yesAdvanced Optical Materials, EarlyView.
This study demonstrates that conjugated polyelectrolytes with tunable ionic density can act as effective interfacial layers in inverted PbS quantum dot photodiodes. By enhancing dipole orientation and defect passivation at the ITO/QD interface, the devices exhibit suppressed dark current, improved photocurrent, and a record near‐infrared detectivity of
Chanwoo Lim   +8 more
wiley   +1 more source

530 The forming characteristics in Micro-Forging with Ultrasound Vibration

open access: diamond, 2002
Mitsugu MOTOMURA   +3 more
openalex   +2 more sources

Spectroscopic Ellipsometry Characterization and Radiative Limit Modeling of Bismuth‐Based Perovskite‐Inspired Absorbers for Indoor Photovoltaics

open access: yesAdvanced Optical Materials, EarlyView.
This study determines the optical constants of two lead‐free perovskite‐inspired materials (PIMs), Cu2AgBiI6 and Cs3Bi2I6Br3, promising for indoor light conversion. The optical constants are applied to simulate photovoltaic device optics, and thereupon, revise the theoretical limits for photocurrent generation and power conversion efficiency, providing
Aleksi Kamppinen   +6 more
wiley   +1 more source

Cu-Doped Cs<sub>3</sub>Sb<sub>2</sub>Cl<sub>9</sub> Nanocrystals: Revisiting the Low Bandgap of Cs<sub>2</sub>CuSbCl<sub>6</sub> Double Perovskites. [PDF]

open access: yesACS Mater Lett
Virga S   +7 more
europepmc   +1 more source

530 Micro Deburring Technology Using Ultrasonic Cavitation

open access: diamond, 2003
Hyung-Youn Choi   +3 more
openalex   +1 more source

Impact of Attaching Selectively Reflecting Cholesteric Layers on Edge Output of Static and Dynamic Luminescent Solar Concentrators

open access: yesAdvanced Photonics Research, EarlyView.
Luminescent solar concentrators (LSCs) are colorful solar energy devices designed for integration into urban settings. Their modest efficiencies partly result from excessive light surface losses . By directly coating both static and switchable LSCs with selectively reflecting chiral nematic (cholesteric) layers red‐shifted ≈70 nm to the peak emission ...
Sebastian J. M. Robben   +4 more
wiley   +1 more source

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