Results 41 to 50 of about 3,342 (219)

Trions as Fundamental Species in Chemically Doped Polymer Semiconductors

Advanced Materials, EarlyView.
This work shows that exciton–charge carrier coupling in doped polymer semiconductors gives rise to multi‐particle states, including trions—quasiparticles consisting of two holes and one electron under p‐doping—and bound exciton‐hole pairs, as identified through spectroscopic and theoretical analysis.
Hongmo Li, Henry J. Kantrow, David A. Valverde‐Chávez, Meghan McNeil, Arianna Magni, Mohammad Balooch Qarai, Jude Kpare, Jaden Cramlet, Qiao He, Félix Thouin, Zhihao Feng, Yadong Zhang, Andrew Comstock, Stephen Barlow, Jason Azoulay, Seung Soon Jang, Renaud Demadrille, Martin Heeney, Seth Marder, Nicholas J. Hestand, Alberto Salleo, Frank C. Spano, Carlos Silva‐Acuña, Natalie Stingelin   +23 more
wiley   +1 more source

Beyond Nanoporosity: A CO2‐Conditioned Glassy Matrix Contributes to the Brittle‐to‐Ductile Transition of Nanocellular Polyetherimide

Advanced Materials, EarlyView.
The mechanical performance of nanocellular polyetherimide cannot be explained by nanoporosity alone. It is shown that CO2 saturation and desorption leave a distinct mechanical signature in the glassy matrix before foaming. This matrix contribution provides a new route to understand and optimize the brittle to ductile transition in nanocellular polymers.
Félix Lizalde‐Arroyo, Frederik Van Loock, Victoria Bernardo, Tuuli Peltola, René Bes, Alberto Tena, Miguel Ángel Rodríguez‐Pérez, Judith Martín‐de León   +7 more
wiley   +1 more source

Ionic Gating of Liquid‐Crystal‐Like Pteridine Assemblies Enables Tunable Light Scattering

Advanced Materials, EarlyView.
Tunable optical properties emerge through developmentally regulated ionic gating, which transforms disordered, ultraviolet (UV)‐absorbing organelles into concentrically ordered, liquid‐crystal‐like light scatterers. By integrating analyses of pteridine composition, potassium‐dependent assembly, hierarchical ultrastructure, and optical behavior, the ...
Sourabh Bera, Zohar Eyal, Yael Noy, Yuval Barzilay, Siddharth Sahoo, Srikant Moharana, Avi Baram, Tali Lerer‐Goldshtein, Neta Varsano, Bar Bader, Lothar Houben, Uwe Heinig, Iddo Pinkas, Moshe Goldsmith, Tamar Unger, Shira Albeck, Andrea Sorrentino, Maxim Itkin, Sergey Malitsky, Ziv Porat, Ido Hadar, Venkata Jayasurya Yallapragada, Dvir Gur   +22 more
wiley   +1 more source

Effect of volume ratio between Cu-Sn-Ti alloy and vitrified binder on microstructures and mechanical properties of diamond segments

Jin'gangshi yu moliao moju gongcheng, 2020
To improve the holding strength of bond to the diamond grits, a Cu-Sn-Ti alloy was introduced as an additive into the SiO2-Al2O3-B2O3-Li2O vitrified bond, which was then made into segments with diamonds.
ZHAO Pengcheng, YAN Xinlin, XIAO Bing, MENG Xianglong, LIU Bingheng   +4 more
doaj  

Effect of nanometer Ti(C,N)on property of vitrified bond for CBN abrasives

Jin'gangshi yu moliao moju gongcheng, 2016
Na2O-Al2O3-SiO2-B2O3 based vitrified bond was selected as the main research subject.Vitrified bond for nanometer titanium carbonitride could be obtained by adding 2%,4%,6% and 8%mass fraction nano-Ti(C,N)into the basic glass material.The flexural ...
CHEN Feixiao, ZHAO Zhiwei, HU Wenmeng
doaj  

Research on preparation of vitrified bond lapping plates and lapping sapphire performance

Jin'gangshi yu moliao moju gongcheng, 2021
To improve the lapping efficiency and processing quality of the sapphire substrate, two lapping plates composed of vitrified bond diamond lapping pellets with different hardness were developed, and the lapping process experiment was carried out on the ...
LU Jiabin, NIE Xiaowei, YAN Qiusheng, CHEN Haiyang   +3 more
doaj  

Bond and topography evaluation of a Y-TZP ceramic with a superficial low-fusing porcelain glass layer after different hydrofluoric acid etching protocols

Revista de Odontologia da UNESP, 2018
Introduction Despite being one of the most studied ceramics today, zirconia still does not have a well-defined adhesion protocol. Objective Evaluate the influence of different etching times and hydrofluoric acid (HF) concentrations on the zirconia ...
Arthur Chaves SIMÕES, Jean Soares MIRANDA, Rodrigo Othávio de Assunção e SOUZA, Estevão Tomomitsu KIMPARA, Fabíola Pessôa Pereira LEITE   +4 more
doaj   +1 more source

A Thermoreversible Gelation Pathway to Plant Cuticle‐Inspired Biopolymer Aerogel Monoliths Based on Network‐Spherulitic Crystal Assemblies

Advanced Materials, EarlyView.
To address functionality limitations in plant‐based and industrially compostable polymer aerogels, this work introduces bio‐inspired aerogels with broadened functionality. Inspired by functional plant tissues, lightweight biopolymer aerogels based on exclusively stereocomplex crystals are fabricated, featuring hierarchically macro‐/meso‐porous ...
Anthony V. Tuccitto, Zeineb Ben Rejeb, Rafaela Aguiar, Nello D. Sansone, Sumaiya Farzana, Isaac Ali, Jun Uk Lee, Daniel J. Davidson, Ailsa K. Edward, Chul B. Park, Patrick C. Lee   +10 more
wiley   +1 more source

Preparing and characterizing ultrafine diamond coated with titanium dioxide

Jin'gangshi yu moliao moju gongcheng, 2018
Using polyvinylpyrrolidone (PVP) as a coupling agent, tetrabutyl orthotitanate (TBOT) as the precursor of titanium dioxide, and ammonia as catalyst, the ultrafine diamond coated with titanium dioxide (UFD@TiO2) with core-shell structure was prepared by ...
ZHAO Yucheng, LI Yapeng, YAN Ning, WANG Mingzhi, ZOU Qin, MIAO Weipeng   +5 more
doaj  

Harnessing Phase Separation for the Development of High‐Performance Hydrogels

Advanced Science, EarlyView.
ABSTRACT Hydrogels are indispensable for the development of next‐generation bioelectronics, soft robotics, and biomedical devices, where their mechanical properties determine performance and reliability. Among strategies to enhance hydrogel mechanics, phase separation enables controlled heterogeneity resulting in gel networks that are reinforced by ...
Yue Shao, Yiming Ma, Baihao Shao, Molly M. Stevens   +3 more
wiley   +1 more source