Results 131 to 140 of about 3,034,026 (343)

Spiropyran-based reversible, light-modulated sensing with reduced photofatigue [PDF]

open access: yes, 2009
Switchable materials have tremendous potential for application in sensor development that could be applied to many fields. We are focusing on emerging area of wireless sensor networks due to the potential impact of this concept in society.
Aleksandar Radu   +45 more
core   +1 more source

In Situ Construction of Multi‐Functional Polymer Network Toward Durable Perovskite Solar Cells

open access: yesAdvanced Science, EarlyView.
Acrylamide monomers were introduced into the perovskite precursor solution to 3D polymer networks at grain boundaries for stabilizing grain boundaries. By constructing weak chemical bond interactions with perovskite films, the polymer networks effectively reduce defect density and simultaneously suppress the degradation of perovskites.
Bingqian Zhang   +14 more
wiley   +1 more source

Heterojunction Derived Efficient Charge Separation for High Sensitivity Self‐Powered Flexible Photodetectors toward Real‐Time Heart Rate Monitoring

open access: yesAdvanced Science, EarlyView.
Schematic diagram of heart rate monitoring by the flexible self‐powered PDs and 710 nm LED illumination. Abstract Real‐time and accurate heart rate monitoring is crucial in the field of disease prevention and early diagnosis. Compared with the conventional rigid heart rate sensors, wearable flexible devices have unique advantages, such as convenient ...
Nan Ding   +7 more
wiley   +1 more source

Solution‐Processed Sterically Hindered Donor–Acceptor Small Molecules as Molecular Floating‐Gates for High‐Efficiency Ambipolar Charge Trapping Memory

open access: yesAdvanced Electronic Materials, EarlyView.
High‐efficiency ambipolar multilevel nonvolatile organic transistor memory using solution‐processing a sterically hindered small molecule spiro[fluorene‐9,7′‐dibenzo[c,h]acridine]‐5′‐one with donor–acceptor structures as charge trapping layer is demonstrated.
Yuyu Liu   +8 more
wiley   +1 more source

The Hermitian Connection and the Jacobi Fields of a Complex Finsler Manifold [PDF]

open access: yesarXiv, 2000
It is proved that all invariant functions of a complex Finsler manifold can be totally recovered from the torsion and curvature of the connection introduced by Kobayashi for holomorphic vector bundles with complex Finsler structures. Equations of the geodesics and Jacobi fields of a generic complex Finsler manifold, expressed by means Kobayashi's ...
arxiv  

3'-R-Spiro[cycloalkyl-1(2), (hetaryl-3(4), 6'-[1,2,4]triazino[2,3-c]quinazoline]-2'(7'H)-2-оnes as a perspective class of compounds with actoprotective activity

open access: yesZaporožskij Medicinskij Žurnal, 2017
Quinazolines and their derivatives are a perspective class of compounds with versatile biological activities. Their representatives are used in medical practice as sleeping, diuretic, antimicrobial and antitumor drugs.
O. S. Kolomoets   +6 more
doaj   +1 more source

Tuning the Performance of Poly(quaterphenyl piperidinium) Anion‐Exchange Membranes by Monomer Configuration

open access: yesAdvanced Energy Materials, EarlyView.
Ether‐free poly(quaterphenyl piperidinium) ionomers are prepared by superacid‐mediated polyhydroxyalkylations and explored as hydroxide conducting membranes. The para‐meta configuration of the quaterphenyl monomer greatly influences polymer backbone flexibility.
Pegah Mansouri Bakvand   +3 more
wiley   +1 more source

Polyphenylene‐Based Anion Exchange Membranes with Robust Hydrophobic Components Designed for High‐Performance and Durable Anion Exchange Membrane Water Electrolyzers Using Non‐PGM Anode Catalysts

open access: yesAdvanced Energy Materials, EarlyView.
Terphenyl groups bearing meta‐phenylene and trifluoromethyl substituents as hydrophobic components are incorporated into a quaternized polyphenylene‐based backbone to produce AEMs. The fabricated thin membranes exhibit high ion conductivity, alkaline stability, and mechanical robustness.
Fanghua Liu   +10 more
wiley   +1 more source

Kaehler-Ricci solitons on homogeneous toric bundles (II) [PDF]

open access: yesarXiv, 2006
It is proved that an homogeneous toric bundles over a flag manifold G^\C/P admits a Kaehler-Ricci solitonic metric if and only if it is Fano. In particular, an homogeneous toric bundle of this kind is Kaehler-Einstein if and only if it is Fano and its Futaki invariant vanishes identically.
arxiv  

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