nanomechanics – TechConnect Briefs

Probing Nanoscale Composites, Interfaces, and Damage Gradients with In-Situ and Ex-Situ Multiscale Mechanical Methodologies

Mara N.A., Los Alamos National Laboratory, US

This presentation reports on recent findings within the Center for Integrated Nanotechnologies that determine the effects of interfacial structures and damage gradients on mechanical response at length scales varying from nanometers to millimeters. Three focus [...]

Computational Hierarchy Modeling of Self-assembled Polyurea Aerogels

Chen G.D., Missouri University of Science and Technology, US

An economical environmentally friendlier synthesis of nanoporous polyurea aerogels from triisocuyanates and water has recently been described. Owing to their multi-functionality and superior mechanical properties, those materials are finding their way into various engineering applications. [...]

Gold Nanoparticles Encapsulated within Graphene Shells

Shi W., Chopra N., The University of Alabama, US

We report here a novel approach to fabricate graphene shell encapsulated Au nanoparticles in a chemical vapor deposition process. In addition, processing parameters were studied to result in best quality non-turbostratic graphene shells. This system [...]

Mapping nanomechanical phenomena of graphene nanostructures using force modulation and ultrasonic force microscopy

Kolosov O.V., Kay N.D., Robinson B.J., Rosamond M., Zeze D., Dinelli F., Lancaster University, UK

Whereas graphene electronic properties are extensively studied, mechanical properties of graphene nanostructures are much less experimentally explored even for simple graphene structures. We use a combination of force sensitive scanning probe microscopies that combines low [...]

Adhesion and dynamic nanotribology of graphene in polar and non-polar liquid environments studied with ultrasonic force microscopy

Robinson B.J., Kolosov O.V., Lancaster University, UK

We report the characterisation of exfoliated few layer graphene (FLG) flakes using a range of scanning probe techniques. We have examined the nanoscale mechanical and interfacial properties of FLG and its substrate material, SiO2, in [...]

Measurement of nanometric deformation of thin membranes under controlled mechanical loads

Jobin M., Sidorenko V., Foschia R., Ecole Ingenieurs Geneve, CH

The accurate mechanical characterisation of thin membranes is recognized of prime importance for the development of membrane-based MEMS. To address this issue, we have built a measurement system which uses a nanoindentor to apply a [...]

Mechanics of silicon nanowires: size-dependent elasticity from first principles

Rudd R.E., Lee B., Lawrence Livermore National Laboratory, US

We have conducted a detailed study of the size dependence of the mechanical properties of silicon nanowires using first principles quantum mechanical calculation together with continuum mechanics theory and atomistic simulation based on empirical potentials. [...]

Modeling and Simulation of Multi-walled Carbon Nanotubes using Molecular Dynamics Simulation

Wong C.H., Liew K.M., He X.Q., Tan M.J., Meguid S.A., Nanyang Technological University, SG

Molecular dynamics simulation is performed on the buckling behavior of single and multi-walled carbon nanotubes under axial compression. Brenners second generation empirical potential is used to describe the many-body short range interatomic interactions for single-walled [...]

System Identification for Motion of Proteins Using an AFM-based Nanorobotic Manipulation

Park J., Kim B-K., Kim D-H., Kim B-K., Kim D-H., Lee K-I., Korea Institute of Science and Technology, KR

It is greatly important to understand the mechanics of AFM-based nanorobotic manipulation for efficient and reliable handling of nanoparticles. Robust motion control of an AFM-based nanorobotic manipulation is much challenging due to uncertain mechanics in [...]

System Identification for Motion of Proteins Using an AFM-based Nanorobotic Manipulation

Park J., Kim B-K., Kim D-H., Kim B-K., Kim D-H., Lee K-I., Korea Institute of Science and Technology, KR

It is greatly important to understand the mechanics of AFM-based nanorobotic manipulation for efficient and reliable handling of nanoparticles. Robust motion control of an AFM-based nanorobotic manipulation is much challenging due to uncertain mechanics in [...]