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View article: Surface-Modified Pd/CeO<sub>2</sub> Single-Atom Catalyst Shows Increased Activity for Suzuki Cross-Coupling
Surface-Modified Pd/CeO<sub>2</sub> Single-Atom Catalyst Shows Increased Activity for Suzuki Cross-Coupling Open
Single-atom catalysts (SACs) comprise catalytically active atoms dispersed on supports; they combine the high activity and site uniformity of homogeneous catalysts with the ease of separability of heterogeneous catalysts. However, SACs lac…
View article: Electron ratchets: State of the field and future challenges
Electron ratchets: State of the field and future challenges Open
Electron ratchets are non-equilibrium electronic devices that break inversion symmetry to produce currents from non-directional and random perturbations, without an applied net bias. They are characterized by strong parameter dependence, w…
View article: Cooperative Transport in a Multi-Particle, Multi-Dimensional Flashing Ratchet
Cooperative Transport in a Multi-Particle, Multi-Dimensional Flashing Ratchet Open
In this work, random and undirected forces are rectified in biological and synthetic systems using ratcheting mechanisms, which employ periodic asymmetric potentials and nonequilibrium conditions to produce useful transport. The density of…
View article: A Silicon Ratchet to Produce Power from Below‐Bandgap Photons
A Silicon Ratchet to Produce Power from Below‐Bandgap Photons Open
This paper computationally demonstrates a new photovoltaic mechanism that generates power from incoherent, below‐bandgap (THz) excitations of conduction band electrons in silicon. A periodic sawtooth potential, realized through elastic str…
View article: How To Drive a Flashing Electron Ratchet To Maximize Current
How To Drive a Flashing Electron Ratchet To Maximize Current Open
Biological systems utilize a combination of asymmetry, noise, and chemical energy to produce motion in the highly damped environment of the cell with molecular motors, many of which are "ratchets", nonequilibrium devices for producing dire…
View article: Light-responsive organic flashing electron ratchet
Light-responsive organic flashing electron ratchet Open
Significance Transport of objects in man-made systems typically relies on energy gradients that span the distance over which the particles must travel. Biological systems do not have these large-scale gradients available and instead transp…
View article: Mechanisms of Symmetry Breaking in a Multidimensional Flashing Particle Ratchet
Mechanisms of Symmetry Breaking in a Multidimensional Flashing Particle Ratchet Open
Ratcheting is a mechanism that produces directional transport of particles by rectifying nondirectional energy using local asymmetries rather than a net bias in the direction of transport. In a flashing ratchet, an oscillating force (here,…
View article: Identification of two mechanisms for current production in a biharmonic flashing electron ratchet
Identification of two mechanisms for current production in a biharmonic flashing electron ratchet Open
Ratchets rectify the motion of randomly moving particles, which are driven by isotropic sources of energy such as thermal and chemical energy, without applying a net, time-averaged force between source and drain. This paper describes the b…