Lawrence Livermore National Laboratory – Page 2

Designing Opto-Electronic Nanomaterials Using First Principles Simulations

Williamson A.J., Lawrence Livermore National Laboratory, US

The results of recent first principles simulations of the structural and opto-electronic of semiconductor nanomaterials will be presented. We will show how the opto-electronic properties of silicon nanomaterials can be controlled by altering their size, [...]

Biomolecular Patterning via Photocatalytic Lithography

Bearinger J.P., Hiddessen A.L., Wu K.J.J., Christian A.T., Dugan L.C., Stone G., Camarero J., Hinz A.K., Hubbell J.A., Lawrence Livermore National Laboratory, US

We have developed a novel method for patterning surface chemistry: Photocatalytic Lithography. This technique relies on inexpensive stamp materials and light; it does not necessitate mass transport or specified substrates, and the wavelength of light [...]

A Numerical Algorithm for Complex Biological Flow in Irregular Microdevice Geometries

Trebotich D., Colella P., Miller G.H., Nonaka A., Marshall T., Gulati S., Liepmann D., Lawrence Livermore National Laboratory, US

We present a numerical algorithm to simulate non-Newtonian flow in complex microdevice components. The model consists of continuum viscoelastic incompressible flow in irregular microscale geometries. Our numerical approach is the projection method of Bell, Colella [...]

Coarse-Grained Molecular Dynamics for Nano-Design

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

The design of nanoscale mechanical systems poses a novel set of challenges for modeling and simulation. The need for an accurate model of the nanoscale components is clear. This can be of the form of [...]

Biologically Inspired Controls over Assembly of Crystalline Nanostructures

De Yoreo J.J., Orme C.A., Qiu R., Dove P.M., Lawrence Livermore National Laboratory, US

By utilizing small molecules and proteins to modulate crystal nucleation and growth, living organisms produce single nanocrystals and nanocrystal composites that exhibit control over the location, phase and crystallographic orientation of the nuclei, as well [...]

Coarse-Grained Molecular Dynamics for Nano-Design

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

The design of nanoscale mechanical systems poses a novel set of challenges for modeling and simulation. The need for an accurate model of the nanoscale components is clear. This can be of the form of [...]

A Numerical Model of Viscoelastic Flows in Microchannels

Trebotich D., Colella P., Miller G., Liepmann D., Lawrence Livermore National Laboratory, US

We present a numerical method to model non-Newtonian, viscoelastic flow at the microscale. The equations of motion are the incompressible Navier-Stokes equations coupled with the Oldroyd-B constitutive equation. This constitutive equation is chosen to model [...]

Modeling AFM Induced Mechanical Deformation of Living Cells

Rudd R.E., McElfresh M., Balhorn R., Allen M., Belak J., Lawrence Livermore National Laboratory, US

One challenge with using Atomic Force Microscopy (AFM) for recognition microscopy on living cells is the fact that the cell is not rigid, and as the force is applied to a receptor site, it is [...]

A Micro Cantilever-based Pathogen Detector

Weeks B.L., Camarero J., Noy A., Miller A.E., Stanker L., De Yoreo J.J., Lawrence Livermore National Laboratory, US

Increasing efforts have been put into the developments of cantilever-based micro sensors. These devices show fast responses, high sensitivity, and are suitable for mass production. Currently, they are mainly applied for quality and process control, [...]

Assembly of Oriented Virus Arrays by Chemo-Selective Ligation Methods and Nanolithography Techniques

Camarero J.A., Cheung C-L, Lin T., Johnson J.E., Weeks B.L., Noy A., De Yoreo J.J., Lawrence Livermore National Laboratory, US

Many experimental techniques in biology and biophysics, and applications in diagnosis and drug discovery, require proteins immobilized on solid substrates. In fact, the concept of arrays of proteins attached to a solid support has attracted [...]