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Publications associées (7)

Demonstrating and Unraveling a Controlled Nanometer-Scale Expansion of the Vacancy Defects in Graphene by CO2

Kumar Varoon Agrawal, Luis Francisco Villalobos Vazquez de la Parra, Kuang-Jung Hsu, Mojtaba Chevalier

A controlled manipulation of graphene edges and vacancies is desired for molecular separation, sensing and electronics applications. Unfortunately, available etching methods always lead to vacancy nucleation making it challenging to control etching. Herein ...

Wiley-VCH Verlag GmbH2022

Systematic design of millisecond gasification reactor for the incorporation of gas-sieving nanopores in single-layer graphene

Kumar Varoon Agrawal, Luis Francisco Villalobos Vazquez de la Parra, Shiqi Huang, Shaoxian Li, Kuang-Jung Hsu

Etching an ensemble of vacancy defects (nanopores) in single-layer graphene (SLG) to obtain a high density of nanopores with an effective size that enables high-performance gas sieving is challenging. This is because nanopore nucleation and expansion are u ...

2021

Mechanistic Study on Thermally Induced Lattice Stiffening of ZIF-8

Kumar Varoon Agrawal, Wendy Lee Queen, Pascal Alexander Schouwink, Mehrdad Asgari, Qi Liu, Deepu Joseph Babu, Jian Hao

The flexibility of the ZIF-8 aperture, which inhibits a molecular cutoff of 3.4 angstrom, can be reduced by rapid heat treatment to obtain CO2-selective membranes. However, the early stages of the structural, morphological, and chemical changes responsible ...

2021

Three-dimensional scanning transmission electron microscopy of dislocation loops in tungsten

Cécile Hébert, Robin Schäublin, Soheil Hasanzadeh

Scanning transmission electron microscopy (STEM) imaging using diffraction contrast is a powerful technique to assess crystal defects. In this work it is used to assess the spatial distribution of radiation induced defect in tungsten. In effect, its irradi ...

PERGAMON-ELSEVIER SCIENCE LTD2018

Comparison between bulk and thin foil ion irradiation of ultra high purity Fe

Anna Prokhodtseva

Accumulation of radiation damage in ultra high purity iron under self ion irradiation without and with simultaneous He implantation was investigated in bulk and thin foil form to assess, on the one hand, the effect of free surfaces and, on the other hand, ...

Elsevier Science Bv2013

A theoretical quantification of the possible improvement in the mechanical properties of carbon nanotube bundles by carbon ion irradiation

William Curtin

Improvement of single wall carbon nanotube (CNT) bundle mechanical properties through carbon ion irradiation is investigated using molecular dynamics. Increased inter-tube shear and toughness properties through formation of inter-tube cross-links is balanc ...

Elsevier2013

Interface-confined mixing and buried partial dislocations for Ag bilayer on Pt(111)

Harald Brune

The trigonal strain-relief pattern formed by an Ag bilayer on Pt(111) is a prominent example for dislocation networks and their use as nanotemplates. However, its atomic structure has not been solved. Combining scanning tunneling microscopy, low-energy ion ...

Amer Physical Soc2012