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2D materials

mohsenzaeem's picture

A new planner BCN lateral heterostructure with outstanding strength and defect-mediated superior semiconducting to conducting properties

Motivated by the recent synthesis of boron-carbon-nitride (BCN) monolayers with different atomic compositions, we propose a novel planar BCN lateral heterostructure with a combination of graphene and hexagonal boron nitride (h-BN) counterparts. Density functional theory (DFT) and classical molecular dynamics (CMD) simulations are integrated to examine the effects of defects (vacancy and Stone-Wales (SW) defects) and temperature on the physical properties of the BCN heterostructure.

Zhaohe Dai's picture

Mechanics at the interfaces of 2D materials

Dear iMechanica researchers,

I'd like to share an opinion paper that was written by Rui Huang, Kenneth Liechti, Nanshu Lu, and I for Current Opinion in Solid State & Materials Science. The aim is to discuss the mechanics research on 2D material interfaces in terms of recent developments and appeared challenges and opportunitiesHere is the link; Below, I also attached a copy of the manuscript and pasted the Abstract.

Kmomeni's picture

3 Ph.D. Positions in Multiscale Mechanics and Materials

Three fully supported Ph.D. positions are open immediately in Advanced Hierarchical Materials by Design Labat the University of Alabama on multiscale modeling of materials and processes. The research directions are in the following fields:

1.     Additive Manufacturing (1 position): The goal of this project is to model the additive manufacturing process and to develop new alloys for additive manufacturing.

Zhaohe Dai's picture

Bending of Multilayer van der Waals Materials

Dear colleagues, I'd like to share our recent work on blister testing of multilayer 2D materials that gives a direct measurement of Young's modulus and bending rigidity of a multilayer (~10-70 layers). Materials involved include graphene, MoS2, and hBN.

Bin Liu's picture

Why are most 2D lattices hexagonal? The stability of 2D lattices predicted by a simple mechanics model

Published in Extreme Mechanics Letters: https://doi.org/10.1016/j.eml.2019.100507. For more than half a century, physicists rejected the existence of two-dimensional (2D) materials since they theoretically underestimated the stability. However, the discovery of one-atom-thick graphene proved the inapplicability of this theory.

Jingjie Yeo's picture

Multiscale Design of Graphyne‐Based Materials for High‐Performance Separation Membranes

https://doi.org/10.1002/adma.201805665 Computational modeling and simulations play an integral role in the bottom‐up design and characterization of graph‐n‐yne materials. Here, the state of the art in modeling α‐, β‐, γ‐, δ‐, and 6,6,12‐graphyne nanosheets for synthesizing graph‐2‐yne materials and 3D architectures thereof is discussed.

Zhaohe Dai's picture

Interface-Governed Deformation of Nanobubbles and Nanotents Formed by Two-Dimensional Materials

In this paper, we experimentally characterize a simple and unified power law for the profiles of a variety of nanobubbles and nanotents formed by 2D materials such as graphene and MoS2 layers. https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.266101

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ABSTRACT

PhD Position in 'Intelligent design of 2D nanostructures based on molybdenum' project

PhD student will be engaged in a research project of National Science Centre (NCN) carried out in the Institute of Fundamental Technological Research PAS, Poland on 'Intelligent design of 2D nanostructures based on molybdenum'.  The materials with a 2D atomic structure (flat, one layer) have drawn attention of researchers for years.

Shuze Zhu's picture

Metallic and highly conducting two-dimensional atomic arrays of sulfur enabled by molybdenum disulfide nanotemplate

https://www.nature.com/articles/s41524-017-0041-z

Element sulfur in nature is an insulating solid. While it has been tested that one-dimensional sulfur chain is metallic and conducting, the investigation on two-dimensional sulfur remains elusive. We report that molybdenum disulfide layers are able to serve as the nanotemplate to facilitate the formation of two-dimensional sulfur.

PhD Position in 'Intelligent design of 2D nanostructures based on molybdenum' project

Two PhD students will be engaged in a research project of National Science Centre (NCN) carried out in the Institute of Fundamental Technological Research PAS, Poland on 'Intelligent design of 2D nanostructures based on molybdenum'.  The materials with a 2D atomic structure (flat, one layer) have drawn attention of researchers for years.

Harley T. Johnson's picture

Postdoc position at UIUC: mechanics of 2D materials

A postdoctoral position in the UIUC research group of Prof. Harley Johnson is available immediately.  The project, in collaboration with Prof. Shaoxing Qu of Zhejiang University, will involve modeling of coupled mechanical and optical behavior of 2D materials.  Candidates should have experience with empirical and first-principles atomistic modeling.  The position will start no later than July 31st, 2017, for a one-year duration, and may be renewable depending on progress and availability of funds.  

Rouzbeh1's picture

Research Scientist/Post-Doctoral Position in Advanced Materials at Rice University

Position Description: 

A research scientist/postdoctoral associate position in the area of synthesis and characterization of 2D materials and nanocomposites is available at Rice University. The successful candidates will work in a highly inter-disciplinary and stimulating environment.

 

Job Duties and Responsibilities: 

Kmomeni's picture

Special issue on "Low-Dimensional Phase Transforming Materials"

A special issue of Journal of Nanomaterials is devoted to "Low-Dimensional Phase Transforming Materials" which obtained significant interests in the recent years. This topic covers a broad range of research such as 

Harley T. Johnson's picture

A critical thickness condition for graphene and other 2D materials

B. C. McGuigan, P. Pochet, and H. T. Johnson, Critical thickness for interface misfit dislocation formation in two-dimensional materials, Phys. Rev. B 93, 214103, 2016.

URL: http://link.aps.org/doi/10.1103/PhysRevB.93.214103

Shuze Zhu's picture

[Call for Abstract] SES 2016 Symposium E-5: Mechanics of Multifunctional 2D materials and 2D-based Nanostructures

We would like to invite you to submit abstracts to the symposium of Mechanics of Multifunctional 2D materials and 2D-based Nanostructures at the 53rd Annual Technical Meeting of the Society of Engineering Science (SES 2016) to be held at University of Maryland College Park (October 2-5, 2016).

Symposium Description

Harold S. Park's picture

Journal Club Theme of June 2016: 2D Materials: Current and Future Directions

Two-Dimensional (2D) materials have been widely studied since the discovery of graphene in 2004.  Many of the initial works on the various 2D materials (graphene, MoS2 and other transition metal dichalcogenides, black phosphorus, and others like the monochalcogenides) by mechanicians focused on issues like ideal strength, and appropriate methods to calculate the bending modulus.  Some of these, and other issues, were reviewed by Sulin Zhang in a J-Club from March 2015 (http://imechanica

Harold S. Park's picture

Negative Poisson's Ratio in Single-Layer Graphene Ribbons

The Poisson's ratio characterizes the resultant strain in the lateral direction for a material under longitudinal deformation.  Though negative Poisson's ratios (NPR) are theoretically possible within continuum elasticity, they are most frequently observed in engineered materials and structures, as they are not intrinsic to many materials.  In this work, we report NPR in single-layer graphene ribbons, which results from the compressive edge stress induced warping of the edges.

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