Results 191 to 200 of about 34,079 (254)

Hybrid Amyloid–Boron Nitride Aerogels for Lightweight Sound Insulation

Advanced Materials, EarlyView.
Amyloid fibrils template the mild formation of boron nitride–rich hybrid aerogels with hierarchical porosity, enhanced BN‐like ordering, and fibril‐reinforced mechanics. These ultralight materials combine thermal stability with strong sound absorption and transmission loss, offering a sustainable bio‐assisted route toward lightweight acoustic shields ...
Mohammad Peydayesh, Andrin Lustgarten, Stefan Schoenwald, Enrico Boschi, My Hanh Bui, Ali Miserez, Felix Donat, Christoph R. Müller, Raffaele Mezzenga   +8 more
wiley   +1 more source

Solvent‐Guided Chiral Assemblies and Chemical Doping of OEG‐Functionalized Conjugated Polymers

Advanced Materials, EarlyView.
Solvent‐dependent aggregation pathways dictate whether conjugated polymers form chiral lyotropic liquid‐crystalline assemblies or achiral packed aggregates. Mapping solvent‐controlled β₁ and β2 states reveals that weaker backbone association favors β₁ aggregates and reorganizable twisted mesophases, whereas stronger backbone association favors β2 ...
Sanghyun Jeon, Justin Scott Neu, Nahyun Ahn, Ayse Senlik, Yen‐Chi Chen, Pravini S. Fernando, Priyotosh Bairagya, Chetan Kumar Prasad, Janice Mihyun Baek, Wei You, Ying Diao   +10 more
wiley   +1 more source

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Optical anisotropy of NbOCl2

Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XX, 2023
Guo et al, 2023, report that NbOCl2 is a novel thin-material SPDC source. This work presents optical measurements on thick flakes of the material that differ from standard SPDC sources like LiNbO3.
Shuin Jian Wu, Yi Wei Ho, Isa Ahmadalidokht, Goki Eda, Alexander Ling   +4 more
openaire   +1 more source

Optical anisotropy of (311) superlattices

Physical Review B, 1994
We report a calculation of the electronic properties of GaAs/AlAs (311) superlattices through the Brillouin zone using realistic values of the parameters in a tight-binding Hamiltonian. The nature and the localization of the lowest conduction bands for these low-symmetry structures is investigated and its origin is studied with respect to the layer ...
, Jouanin, , Hallaoui, , Bertho
openaire   +2 more sources

Optical anisotropy of polypeptide chains

Biopolymers, 1972
AbstractOptical anisotropies γ2 of N‐t‐butylacetamide (tBA), N‐Methylacetamide (MA), and N, N‐dimethylacetamide (DMA) have been determined from the Rayleigh ratios for depolarzed scattering by dilute solutions of the amides in p‐dioxane. Traceless optical polarizability tensors \documentclass{article}\pagestyle{empty}\begin{document}$ \widehat{\rm ...
R T, Ingwall, P J, Flory
openaire   +2 more sources

Optical anisotropies in electromodulation

SPIE Proceedings, 1990
We describe both reflectance anisotropy and electroreflectance measurements carried out to determine the physical origin of the anisotropies observed in the reflectance spectrum of (001) and (110) GaAs. We find an anisotropy component which depends on impurity concentration for both (001) and (110) surfaces [and on conductivity type for (001) GaAs].
Sofia E. Acosta-Ortiz, Alfonso Lastras-Martinez   +1 more
openaire   +1 more source

Optical anisotropy of UNi2Si2

Physica B: Condensed Matter, 1993
Abstract The optical anisotropy of UNi 2 Si 2 has been systematically studied by reflectance spectroscopy in the range of 50 to 37 000 cm -1 . A temperature-dependent absorption peak was found in the c -axis optical conductivity spectra centered at 280 cm -1 in the incommensurate longitudinal spin-density-wave phase (103 K T K ), which, we ...
N. Cao, J.D. Garrett, T. Timusk
openaire   +1 more source

Optical Anisotropy of Semiconductor Nanowires

2008
Semiconductor nanowires are novel nanostructures full of promise for optical applications. Nanowires have subwavelength diameters and large aspect ratios, which combined with the high permittivity of semiconductors lead to a strong optical anisotropy.
Gómez Rivas, J., Muskens, Otto L., Diedenhofen, S.L., Borgström, M.T., Bakkers, E.P.A.M.   +4 more
openaire   +2 more sources

Optical anisotropy of biotissues

SPIE Proceedings, 2001
To create a model of development of atherosclerosis and other major human diseases the structural and functional peculiarities of bradytrophic tissues were studied in series of investigations. Sclera, cornea, tendon, cartilage and some other tissues belong to bradytrophic tissues, which nutrition is the result of the diffusion of extravasal liquid.
Georgy V. Simonenko, Tatyana P. Denisova, Nina A. Lakodina, Alexander V. Papaev, Valery V. Tuchin   +4 more
openaire   +1 more source