Publications de Xiao Zhou | EPFL Graph Search

Critical assessment of hydrogen pipe diffusion at dislocations in metals

Hydrogen-dislocation interactions have always been a crucial problem in understanding and predicting the longstanding hydrogen embrittlement (HE) phenomenon in structural metals. Particularly with respect to hydrogen diffusion, dislocations have often been ...

Pergamon-Elsevier Science Ltd2024

Single-Walled Black Phosphorus Nanotube as a NO(2 )Gas Sensor

Xiao Zhou, Cheng Chen, Pengfei Ou

An ab initio density functional theory study on the candidacy of single-walled black phosphorus nanotubes (BPNTs) towards sensing several common toxic gas molecules (NH3, CO, NO, NO2, and SO2) was conducted. Various adsorption characteristics, including th ...

ELSEVIER2022

High throughput synthesis enabled exploration of CoCrFeNi-based high entropy alloys

William Curtin, Xiao Zhou

To accelerate the exploration, screening, and discovery of structural high-entropy alloys with targeted properties, the newly developed High-Throughput Hot-Isostatic-Pressing based Micro-Synthesis Approach (HT-HIP-MSA) is employed to efficiently synthesize ...

JOURNAL MATER SCI TECHNOL2022

Electric metal contacts to monolayer blue phosphorus: electronic and chemical properties

Xiao Zhou, Cheng Chen, Pengfei Ou

The contact nature when monolayer blue phosphorus (blueP) interfaces with three transition metal electrodes (i. e., Pd, Ir, and Pt) was unraveled by the ab initio density functional theory calculations. Specifically, n-type Schottky contact is observed for ...

ELSEVIER2022

Mechanism and Prediction of Hydrogen Embrittlement in fcc Stainless Steels and High Entropy Alloys

William Curtin, Xiao Zhou, Ali Tehranchi

The urgent need for clean energy coupled with the exceptional promise of hydrogen (H) as a clean fuel is driving development of new metals resistant to hydrogen embrittlement. Experiments on new fcc high entropy alloys present a paradox: these alloys absor ...

AMER PHYSICAL SOC2021

Improved thermal stability and fast phase change speed of Y-doped Sb7Se3 thin film for phase change memory applications

Xiao Zhou, Haitao Zhou

By combining experiments and first-principles calculations, Y-doped Sb7Se3 thin films were successfully fabricated and investigated. Our results suggest that Y is one promising dopant for simultaneously enhancing thermal stability, increasing phase change ...

ELSEVIER2020

Zn-doped Sb70Se30 thin films with multiple phase transition for high storage density and low power consumption phase change memory applications

Xiao Zhou, Haitao Zhou

The single layer Zn44Sb39Se17 thin film, being fabricated by Sb70Se30 and Zn using co-sputtering method, exhibits double phase change transition. The double phase change processes are mainly attributed to the crystallization of the Sb and ZnSb phases. The ...

PERGAMON-ELSEVIER SCIENCE LTD2020

First principles study of the effect of hydrogen in austenitic stainless steels and high entropy alloys

William Curtin, Xiao Zhou

Hydrogen (H) embrittlement in multicomponent austenitic alloys is a serious limitation to their application in many environments. Recent experiments show that the High-Entropy Alloy (HEA) CoCrFeMnNi absorbs more H than 304 Stainless Steel but is less prone ...

2020

A new variational line tension model for accurate evaluation of the stress effect on cross-slip energy barrier in face-centered cubic metals

Xiao Zhou, Hui Liu

The present work developed a new variational line tension model (LTM) that accounts for contributions from the local line energy, long-range interaction among dislocation segments, and interplay between dissociated partials. This new LTM has been shown to ...

2019

Reduction of Fermi level pinning at Cu-BP interfaces by atomic passivation

Xiao Zhou, Cheng Chen, Pengfei Ou

Black phosphorus (BP) is a semiconducting material with a direct finite band gap in its monolayer, attracting intense attention for its application in field-effect transistors. However, strong Fermi level pinning (FLP) has been observed for contacts betwee ...

2019