Results 151 to 160 of about 1,224,382 (402)

Active Hydrogen for Electrochemical Ammonia Synthesis

open access: yesAdvanced Functional Materials, EarlyView.
This review provides a comprehensive overview of the active hydrogen (H*) for electrochemical ammonia synthesis with particular attention given to the regulation of H* generation and consumption to suppress the competition of hydrogen evolution reaction and enhance the yield, selectivity, and Faradaic efficiency of ammonia.
Guoqiang Gan, Guo Hong, Wenjun Zhang
wiley   +1 more source

Spin multiplicity and entanglement swapping in radical ion recombinations [PDF]

open access: yesarXiv, 2009
We address the problem of relative frequencies of singlet and triplet recombinations in a multiparticle system, which consists of spin-correlated radical ion pairs. The nonlocal swapping of spin correlations due to cross-recombinations is taken into account.
arxiv  

Negative capacitance in organic semiconductor devices: bipolar injection and charge recombination mechanism

open access: yes, 2007
We report negative capacitance at low frequencies in organic semiconductor based diodes and show that it appears only under bipolar injection conditions.
C. Lungenschmied   +6 more
core   +1 more source

Imbalanced Surface Charge Induced Phase Segregation in Mixed Halide Perovskites

open access: yesAdvanced Functional Materials, EarlyView.
The key factor determining the phase segregation in mixed halide perovskites (MHP) is the intrinsic imbalanced surface charges in the crystal lattice. MHP films with excellent crystallinity and surface morphology can suffer severe phase segregation.
Zixin Zeng   +7 more
wiley   +1 more source

Radiation of the Tunnel Electron on Secondary Center of Recombination [PDF]

open access: yesarXiv, 2013
We discuss the photon emission that occurs due to the radiative recombination of an electron on a nearby center after tunneling ionization. The model of an active electron is used, and analytical solution to three-dimensional problem is obtained. The dependence of the photon emission from a distance between centers of ionization and a recombination ...
arxiv  

Unravelling the Effects of Grain Boundary and Chemical Doping on Electron-Hole Recombination in CH3NH3PbI3 Perovskite by Time-Domain Atomistic Simulation.

open access: yesJournal of the American Chemical Society, 2016
Advancing organohalide perovskite solar cells requires understanding of carrier dynamics. Electron-hole recombination is a particularly important process because it constitutes a major pathway of energy and current losses.
R. Long, Jin Liu, O. Prezhdo
semanticscholar   +1 more source

Hydrogel‐Based Photothermal‐Catalytic Membrane for Efficient Cogeneration of Freshwater and Hydrogen in Membrane Distillation System

open access: yesAdvanced Functional Materials, EarlyView.
This work presents an overview of the PTC‐VMD system for water‐hydrogen co‐generation. a) Illustration of the hydrogel‐based PTC membrane and the co‐generation of water and hydrogen. b) Structure of the PTC‐VMD system and the functions of each component layer.
Jiawei Sun   +7 more
wiley   +1 more source

The randomness that shapes our DNA

open access: yeseLife, 2018
Just 5% of the human genome is subject to neutral evolution, but this process remains central to understanding the history of human migration across the Earth.
Kelley Harris
doaj   +1 more source

New Calculations of Recombination Rates for Cold $^4$He Atoms and Determination of Universal Scaling Functions

open access: yes, 2007
Three-body recombination rates for cold $^4$He are calculated with a new method which exploits the simple relationship between the imaginary part of the atom-dimer elastic scattering phase shift and the $S$-matrix for recombination.
J. R. Shepard, K. Watson
core   +1 more source

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