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Superior lattice thermal conductance of single-layer borophene

By way of the non-equilibrium Green’s function simulations and first-principles calculations, we report that borophene, a single layer of boron atoms that was fabricated recently, possesses an extraordinarily high lattice thermal conductance in the ballistic transport regime, which even exceeds graphene. In addition to the obvious reasons of light mass and strong bonding of boron...

Exploring Ag(111) Substrate for Epitaxially Growing Monolayer Stanene: A First-Principles Study

Stanene, a two-dimensional topological insulator composed of Sn atoms in a hexagonal lattice, is a promising contender to Si in nanoelectronics. Currently it is still a significant challenge to achieve large-area, high-quality monolayer stanene. We explore the potential of Ag(111) surface as an ideal substrate for the epitaxial growth of monolayer stanene. Using first-principles...

Tuning magnetoresistance in molybdenum disulphide and graphene using a molecular spin transition

Zeng in:Nature Research journals • PubMed • Google Scholar Search for Yong-Wei Zhang in:Nature Research journals • PubMed • Google Scholar Search for Han Zhang in:Nature Research journals • PubMed

Nanostructure Formation by controlled dewetting on patterned substrates: A combined theoretical, modeling and experimental study

Mohamed Asbahi in:Nature Research journals • PubMed • Google ScholarSearch for Joel K. W. Yang in:Nature Research journals • PubMed • Google ScholarSearch for Yong-Wei Zhang in:Nature Research journals ... Correspondence to Joel K. W. Yang or Yong-Wei Zhang. Supplementary information Word documents1.Supplementary Information Rights and permissions This work is licensed under a Creative Commons Attribution

High aspect ratio 10-nm-scale nanoaperture arrays with template-guided metal dewetting

journals • PubMed • Google ScholarSearch for Yong Wei Zhang in:Nature Research journals • PubMed • Google ScholarSearch for Joel K. W. Yang in:Nature Research journals • PubMed • Google Scholar Contributions ... the manuscript. All authors reviewed the manuscript. Competing interests All authors of this manuscript are inventors on a related patent application. Corresponding authors Correspondence to Yong Wei

Increased negative supercoiling of mtDNA in TOP1mt knockout mice and presence of topoisomerases IIα and IIβ in vertebrate mitochondria

Topoisomerases are critical for replication, DNA packing and repair, as well as for transcription by allowing changes in DNA topology. Cellular DNA is present both in nuclei and mitochondria, and mitochondrial topoisomerase I (Top1mt) is the only DNA topoisomerase specific for mitochondria in vertebrates. Here, we report in detail the generation of TOP1mt knockout mice, and...

Kinetic nanofriction: a mechanism transition from quasi-continuous to ballistic-like Brownian regime

Surface diffusion of mobile adsorbates is not only the key to control the rate of dynamical processes on solid surfaces, e.g. epitaxial growth, but also of fundamental importance for recent technological applications, such as nanoscale electro-mechanical, tribological, and surface probing devices. Though several possible regimes of surface diffusion have been suggested, the...

On optimal hierarchy of load-bearing biological materials

Load-bearing biological materials such as shell, mineralized tendon and bone exhibit two to seven levels of structural hierarchy based on constituent materials (biominerals and proteins) of relatively poor mechanical properties. A key question that remains unanswered is what determines the number of hierarchical levels in these materials. Here we develop a quasi-self-similar...

Metal-functionalized single-walled graphitic carbon nitride nanotubes: a first-principles study on magnetic property

The magnetic properties of metal-functionalized graphitic carbon nitride nanotubes were investigated based on first-principles calculations. The graphitic carbon nitride nanotube can be either ferromagnetic or antiferromagnetic by functionalizing with different metal atoms. The W- and Ti-functionalized nanotubes are ferromagnetic, which are attributed to carrier-mediated...

Role of CT perfusion imaging in evaluating the effects of multiple burr hole surgery on adult ischemic Moyamoya disease

Introduction To evaluate the effects of the multiple burr hole (MBH) revascularization on ischemic type adult Moyamoya disease (MMD) by computed tomography perfusion (CTP). Methods Eighty-six ischemic MMD patients received CTP 1 week before and 3 weeks after MBH operation. Fifty-seven patients received it again at 6 month and underwent digital subtraction angiography (DSA) and...

A Molecular Dynamics Study of the Effect of Voids on the Deformation Behavior of Nanocrystalline Copper

Molecular dynamics simulations are performed to study the effect of preexisting ellipsoidal voids on the tensile deformation behavior in nanocrystalline copper. No crack propagation is observed regardless of the orientation of the voids with respect to the tensile direction. However it is found that the voids may assist the shear plane formation via (1) emitting dislocations from...

A Molecular Dynamics Study of the Effect of Voids on the Deformation Behavior of Nanocrystalline Copper

Molecular dynamics simulations are performed to study the effect of preexisting ellipsoidal voids on the tensile deformation behavior in nanocrystalline copper. No crack propagation is observed regardless of the orientation of the voids with respect to the tensile direction. However it is found that the voids may assist the shear plane formation via (1) emitting dislocations from...

A Molecular Dynamics Study of the Effect of Voids on the Deformation Behavior of Nanocrystalline Copper

Molecular dynamics simulations are performed to study the effect of preexisting ellipsoidal voids on the tensile deformation behavior in nanocrystalline copper. No crack propagation is observed regardless of the orientation of the voids with respect to the tensile direction. However it is found that the voids may assist the shear plane formation via (1) emitting dislocations from...

Reconstruction of Saccular and Dissected Intracranial Aneurysms Using Solitaire™ AB Stents

Introduction We aimed to evaluate the feasibility, safety, efficacy, and predictors for outcome of reconstructive treatment with Solitaire™ AB stent(s) based on 54 cases of saccular aneurysms and 14 of acute symptomatic dissecting aneurysms. Methods Fifty-eight consecutive patients (M/F = 28/30; median age, 53 years) harbouring 68 aneurysms (ruptured/unruptured = 12/56) underwent...

Poly(ADP-ribose) polymerase and XPF–ERCC1 participate in distinct pathways for the repair of topoisomerase I-induced DNA damage in mammalian cells

Poly(ADP-Ribose) (PAR) polymerase (PARP) inhibitors represent a promising class of novel anticancer agents. The present study explores the molecular rationale for combining veliparib (ABT-888) with camptothecin (CPT) and its clinical derivatives, topotecan and irinotecan. ABT-888 inhibited PAR induction by CPT and increased CPT-induced cell killing and histone γH2AX. Increased...