Results 121 to 130 of about 1,482,446 (314)

Anisotropic structural dynamics of monolayer crystals revealed by femtosecond surface x-ray scattering

open access: yes, 2018
X-ray scattering is one of the primary tools to determine crystallographic configuration with atomic accuracy. However, the measurement of ultrafast structural dynamics in monolayer crystals remains a long-standing challenge due to a significant ...
Clark, Genevieve   +24 more
core   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

open access: yesAdvanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida   +16 more
wiley   +1 more source

Prospects of Electric Field Control in Perpendicular Magnetic Tunnel Junctions and Emerging 2D Spintronics for Ultralow Energy Memory and Logic Devices

open access: yesAdvanced Functional Materials, EarlyView.
Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp   +7 more
wiley   +1 more source

Fission fragments mass distributions of nuclei populated by the multinucleon transfer channels of the 18O+232Th reaction

open access: yesPhysics Letters B, 2016
It is shown that the multinucleon transfer reactions is a powerful tool to study fission of exotic neutron-rich actinide nuclei, which cannot be accessed by particle-capture or heavy-ion fusion reactions.
R. Léguillon   +17 more
doaj   +1 more source

Controlled Aggregation of Pyrene‐Based Supramolecular Nanostructures for Light‐Driven Switchable H2 or H2O2 Production

open access: yesAdvanced Functional Materials, EarlyView.
This work reports the self‐assembly of a pyrene derivative into two distinct nanostructures and their application in visible‐light photocatalysis. The two nanostructures exhibit completely different yet complementary photocatalytic activities, promoting either H2 or H2O2 evolution.
Marianna Barbieri   +6 more
wiley   +1 more source

Catalytic, Asymmetric Alkylation via Excited-State Iminium Ions [PDF]

open access: yesChem, 2017
The catalytic, enantioselective β-alkylation of unsaturated carbonyls is a powerful strategy for selectively installing stereocenters vicinal to carbonyls, yet it remains surprisingly elusive. In a recent publication in Nature Chemistry , Melchiorre and co-workers have introduced an elegantly simple solution that addresses this challenge by developing
openaire   +1 more source

Low‐Symmetry Weyl Semimetals: A Path to Ideal Topological States

open access: yesAdvanced Functional Materials, EarlyView.
This study presents a theoretical framework for realizing ideal Weyl semimetals, where Weyl nodes are well‐isolated at the Fermi level. The approach is exemplified in the low‐symmetry material Cu2SnSe3, which exhibits tunable topological phases, current‐induced orbital magnetization, and a strong circular photogalvanic effect, making it a promising ...
Darius‐Alexandru Deaconu   +3 more
wiley   +1 more source

Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial

open access: yesItalian National Conference on Sensors, 2013
We study the presence of dark and bright modes in a planar metamaterial with a double rod unit cell introducing geometric asymmetry in rod lengths.
N. E. J. Omaghali   +3 more
semanticscholar   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

open access: yesAdvanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner   +4 more
wiley   +1 more source

Charge-transfer excitation: unconventional yet practical means for controlling stereoselectivity in asymmetric photoreactions.

open access: yesChemical Society Reviews, 2013
In chiral donor-acceptor (D-A) systems, irradiation wavelength plays vital roles in determining the photochemical consequences. Selective excitation of a D-A complex at the charge-transfer (C-T) band affords an excited C-T complex (ECT), while the local ...
Tadashi Mori, Y. Inoue
semanticscholar   +1 more source

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