Results 11 to 20 of about 9,149 (206)

Benzoyl-Xanthenoxanthenes: Versatile Chromophores for Light-Engaging Applications. [PDF]

open access: yesAngew Chem Int Ed Engl
Oxidatively stable benzoyl‐fused peri‐xanthenoxanthene ribbons with NIR emission were synthesized. Their good spectral overlap enabled cascaded Förster resonance energy transfer (FRET) antennae in a nematic liquid crystal phase, achieving directional energy transfer.
De Luca C   +10 more
europepmc   +3 more sources

BN/BO Doping of peri-Acenoacenes: Modulating Excited States in Trapeziumene Congeners. [PDF]

open access: yesAngew Chem Int Ed Engl
A new family of (2,5,4)‐trapeziumenes bearing NBNBN, NBOBN, OBNBO, and OBOBO doping patterns is synthesized. Progressive N→O substitution enables precise control over the excited‐state landscape, increasing the S1 energy, decreasing the T1 energy, and widening the T2–T1 energy gap.
Poletto D   +7 more
europepmc   +3 more sources

Methanol Sensor-Less Control Strategy for Direct Methanol Fuel Cell Startup

open access: yesFrontiers in Energy Research, 2022
It is critical and challenging to start direct methanol fuel cells (DMFCs) from various environmental states to an ideal operating state by a sensor-less method.
Haibo Gan   +5 more
doaj   +1 more source

Synthesis and Characterization of Chitosan-Polyvinyl AlcoholFe2O3 Composite Membrane for DMFC Application

open access: yesMakara Journal of Science, 2020
This study investigates the utilization of different compositions of Fe2O3 and polyvinyl alcohol (PVA) to modify chitosan in order to prepare a composite membrane.
Dian Permana   +4 more
doaj   +1 more source

Neurofeedback-guided kinesthetic motor imagery training in Parkinson’s disease: Randomized trial

open access: yesNeuroImage: Clinical, 2022
Background: Parkinson’s disease (PD) causes difficulty with maintaining the speed, size, and vigor of movements, especially when they are internally generated. We previously proposed that the insula is important in motivating intentional movement via its
Sule Tinaz   +8 more
doaj   +1 more source

Study of Solvent Effect on PVDF-HFP Gel Polymer Electrolyte Containing Ionic Liquid Pyr<sub>1,4</sub>TFSI for Lithium Batteries Application. [PDF]

open access: yesMacromol Rapid Commun
The study develops gel polymer electrolytes using PVDF‐HFP copolymer, lithium salt, and an ionic liquid, evaluates how different solvents affect crystallinity, thermal stability, microstructure, and conductivity, observes a crystallinity decrease from 31% to 11%, identifies solvent‐dependent membrane morphologies, and reports the highest conductivity ...
Zanotto PV, Fernandes EG, Martins VL.
europepmc   +2 more sources

A Multi-Fluid Model for Water and Methanol Transport in a Direct Methanol Fuel Cell

open access: yesEnergies, 2022
Direct-methanol fuel cell (DMFC) systems are comparatively simple, sometimes just requiring a fuel cartridge and a fuel cell stack with appropriate control devices.
Anders Christian Olesen   +2 more
doaj   +1 more source

Experimental measurement technique for the assessment of the fuel crossover diffusion coefficient in the membrane electrode assembly of a direct methanol fuel cell [PDF]

open access: yes, 2017
Since the cross-over still seems to be the main issue of the direct methanol fuel cells, an experimental evaluation of the diffusive cross-over is performed.
Borello, Domenico   +3 more
core   +1 more source

Fabrication of Electrically Conductive, Fluid Impermeable Direct Methanol Fuel Cell (DMFC) Graphite Bipolar Plates by Indirect Selective Laser Sintering (SLS) [PDF]

open access: yes, 2008
Graphite bipolar plates are highly desirable due to their properties of high electrical conductivity and low weight but are associated with prohibitive machining costs arising from poor mechanical properties.
Alayavalli, Kaushik, Bourell, David L.
core   +1 more source

Performance Analysis of Direct Methanol Fuel Cell for Optimal Operation

open access: yesJournal of Thermal Science and Technology, 2009
Direct methanol fuel cell (DMFC) is one of promising candidates for power sources of mobile devices. Efficient operation of fuel cell system is very important for long-sustained power supply due to limited tank size.
Changhwan CHO   +2 more
doaj   +1 more source

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