We propose a hopping mechanism for diffusion of large nonsticky nanoparticles subjected to topological constraints in both unentangled and entangled polymer solids (networks and gels) and entangled polymer liquids (melts and solutions). Probe particles with size larger than the mesh size ax of unentangled polymer networks or tube diameter ae of entangled polymer liquids are trapped by the netwo...

Among graphene-like family, phosphorene is a typical semiconducting layered material, which can also be a superconductor in low temperature. Applying pressure or tension on phosphorene lattice results in changing the hopping terms, which change the energy bands of the material. In this research we use the tight-binding Hamiltonian, including relevant hopping terms, to calculate energy bands of ...

Irradiation of prenatal and infant rats resulted in a spectrum of highly reproducible nervous system malformations associated with locomotor abnormalities difficult to correlate with morphologic findings. Fetal rats exposed to 150 R on the 13th, 14th. or 15th day ofgestation were born with a hopping gait, paired hind and forelimbs moving in unison instead of the normal alternating mode. Some an...

Temperature-dependent DC-conductivity of PbS nanoparticle films prepared by solution growth technique has been studied. Variable range hopping is identified as a predominant conduction mechanism. Density of localized states near the Fermi level is observed to decrease exponentially with increase of average grain size in the films. PACS: 81.05.Hd; 73.61.Tm; 72.20.i

The Cover Feature shows the general concept of realizing Arrhenius-type lithium-ion conduction in organic electrolytes. key to achieve such mechanism is use thermotropic liquid crystalline single-ion conductors which Li+ hopping distance well defined by self-assembling molecules. More information can be found Full Paper D. Bresser, M. Leclere, et al.

Children perform cyclic motor tasks less efficiently than adults; however, the mechanisms underlying such differences are not fully understood. One mechanism that may contribute to these age-related differences is a differential contribution of muscles and tendons to a given muscle-tendon unit (MTU) excursion. The aims of this study were to (i) compare muscle and tendon excursion between childr...

We investigate how multi-hop routing affects the goodput and throughput performances of IEEE 802.11 distributed coordination function-based wireless networks compared with direct transmission (single hopping), when medium access control dynamics such as carrier sensing, collisions, retransmissions, and exponential backoff are taken into account under hidden terminal presence. We propose a semi-...

We explore charge migration in DNA, advancing two distinct mechanisms of charge separation in a donor (d)-bridge ([Bj])-acceptor (a) system, where [Bj] = B1,B2, . , BN are the N-specific adjacent bases of B-DNA: (i) two-center unistep superexchange induced charge transfer, d*[Bj]a --> d[Bj]a+/-, and (ii) multistep charge transport involves charge injection from d* (or d+) to [Bj], charge hoppin...