Results 111 to 120 of about 7,138,349 (365)

Periodic splay Fréedericksz transitions in a ferroelectric nematic

open access: yesNature Communications
Electric field-induced splay of molecular orientation, called the Fréedericksz transition, is a fundamental electro-optic phenomenon in nonpolar nematic liquid crystals. In a ferroelectric nematic NF with a spontaneous electric polarization $${{\bf{P}}}$$
Bijaya Basnet   +7 more
doaj   +1 more source

Crystal design using multipolar electrostatic interactions: A concept study for organic electronics

open access: yesBeilstein Journal of Organic Chemistry, 2013
Using a simple synthetic protocol, heterohexacene analogues with a quadrupolar distribution of partial charges are readily available. In contrast to most other acenes, these compounds crystallize with a slipped-stack, brickwork-like packing which is ...
Peer Kirsch   +2 more
doaj   +1 more source

Lead halide perovskites: Crystal-liquid duality, phonon glass electron crystals, and large polaron formation

open access: yesScience Advances, 2017
Efficient dynamic screening is key to the success of lead halide perovskites in solar cells and light emitting devices. Lead halide perovskites have been demonstrated as high performance materials in solar cells and light-emitting devices.
K. Miyata, T. Atallah, X. Zhu
semanticscholar   +1 more source

Influence of a Hydrogen Addition to the Inert Gas and Subsequent Heat Treatments on the Microstructure and Mechanical Properties of Magnesium WE43 Fabricated by PBF‐LB/M

open access: yesAdvanced Engineering Materials, EarlyView.
This article investigates optimal processing conditions for the laser‐based powder bed fusion of WE43. To limit the interaction with remaining oxygen, a 3 vol% hydrogen admixture to the inert gas is investigated. Furthermore, heat treatments are investigated in the range of 250–350 °C for 48 h.
Arvid Abel   +9 more
wiley   +1 more source

Simultaneously enhancing the electronic and ionic conductivities of Li2ZnTi3O8 via modification with polyacrylonitrile-derived carbon for high-performance anodes

open access: yesChemPhysMater, 2023
Polyacrylonitrile (PAN) with C≡N bonds can be converted to nitrogen-doped carbon during carbonization, which enhances electronic conductivity by compensating for the deficiency of the Li2ZnTi3O8 (LZTO) anode.
Yujun Bai   +6 more
doaj  

Liquid-Crystal-Enabled Active Plasmonics: A Review

open access: yesMaterials, 2014
Liquid crystals are a promising candidate for development of active plasmonics due to their large birefringence, low driving threshold, and versatile driving methods.
G. Si, Yanhui Zhao, E. Leong, Y. Liu
semanticscholar   +1 more source

Exploring the Effect of Polymer Addition to the Room Temperature Synthesis of Colloidal Lead Halide Perovskite for Better Stability, Higher Passivation, and More Uniform Particle Size

open access: yesAdvanced Engineering Materials, EarlyView.
This study examines the incorporation of the polymer BUTVAR during the synthesis of various perovskite structures at room temperature The study demonstrates that the incorporation of the polymer solution enhances the optical characteristics and improves the shape uniformity of the resultant perovskite material without altering the inherent structure of
Elshaimaa Darwish   +4 more
wiley   +1 more source

Liquid Crystals

open access: yes
Liquid crystals are an intermediate state (3-1) (Mesophase) described as a fourth state of matter. It was first called “flowing crystals” and “fluid crystals.” It appears between the solid phase, in which the movement of molecules is restricted in the triangular lattice. Dimensions and have an integrated molecular organization in location and direction,
Fouad Salem Allawi, Jassam   +3 more
openaire   +3 more sources

Geometry‐Based Scan Curve Analysis: Rapid Method for the Evaluation of Scan Strategies in Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
This study presents rapid evaluation methods for scan strategies in powder bed fusion (PBF) of polymers with a NIR laser as an example for its application. It uses line buffer‐based calculations and point density fields to predict the performance of four different scan strategies. The methods show promising results in laser‐based PBF of polymer samples,
Simon Leupold   +9 more
wiley   +1 more source

Multifunctional C/TiO2 from MXene/Polyaniline for Electromagnetic Protection and Supercapacitor

open access: yesEnergy Material Advances
Enormous endeavors have been made to cope with microwave pollution and energy crisis. Here, porous nitrogen-doped C/TiO2 composites with absorption/shielding/supercapacitor functions were derived from MXene/polyaniline.
Xiaodan Xu   +4 more
doaj   +1 more source

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