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Potassium Channels: Conduction, Selectivity, Blockage, Inactivation, and Gating
out of 5 stars
03 Nov 2006 | | Contributor(s):: Benoit Roux, NCN at Northwestern University
The determination of the structure of the KcsA K+ channel fromStreptomyces lividan has made it possible to investigate the functionof a biological channel at the atomic level. Because of its structuralsimilarity with eukaryotic K-channels, investigations of KcsA areexpected to help understand a...
Molecular Workbench: An Interface to the Molecular World
25 Jun 2006 | | Contributor(s):: Charles Xie
The Molecular Workbench software is a free, open-source modeling and authoring program specifically designed for use in science education. Powered by a set of real-time molecular simulation engines that compute and visualize the motion of particles interacting through force fields, in both 2D...
Nanotechnology in Biology
29 Aug 2006 | | Contributor(s):: Elizabeth Gardner
This is the first of two exercises developed by El Paso High School teachers as part of a two week workshop on nanotechnology education, part of the National Center for Learning and Teaching of Nanoscale Science and Engineering (NCLT) Professional Development Workshop held June 19-30, 2006 at...
Information Theory and Cell/Nanoparticle Modeling
03 Mar 2005 |
Physico-chemical models of cells and nanoparticles are being developed for pure and applied studies. Nanoparticles are simulated by a Poisson-Boltzmann equation (for determining the electric force field in bioelectrolyte media) while an all atom-simulator is used to determine structure. Both...
Three-Dimensional Simulations of Field Effect Sensors for DNA Detection
03 Aug 2006 | | Contributor(s):: Eddie Howell, Gerhard Klimeck
Here, the development of a DNA field-effect transistor (DNAFET) simulator is described. In DNAFETs the gate structure of a silicon on insulator (SOI) field-effect transistor is replaced by a layer of immobilized single-stranded DNA molecules which act as surface probe molecules. When...
Chemical Modification of GaAs with TAT Peptide and Alkylthiol Self-Assembled Monolayers
03 Aug 2006 | | Contributor(s):: Hamsa Jaganathan
The use of self-assembled monolayers (SAM) on semiconductors creates a basis for the design and creation of bioelectronics, such as biosensors. The interface between the surface and an organic monolayer can change significant electrical and physiochemical properties of a biological device....
Technique for High Spatial Resolution, Focused Electrical Stimulation for Electrically Excitable Tissue
08 Aug 2006 | | Contributor(s):: Matteo Mannino
Cochlear implant devices have made use of electrode pulses as a method of nerve fiber stimulation since their early conception. Electrode stimulation is limiting in both quality and consistency, and a new method is required if significant improvements to implant devices are to be made. By using...
06 Aug 2006 | | Contributor(s):: Margarita Shalaev
DNA is a relatively inexpensive and ubiquitous material that can be used as a scaffold for constructing nanowires. Our research focuses on the manufacturing of DNA-templated, magnetic nanowires. This is accomplished by synthesizing positively-charged metal nanoparticles that self-assemble along...
Surface Analysis of Organic Monlayers Using FTIR and XPS
02 Aug 2006 | | Contributor(s):: Jamie Nipple, Michael Toole, David Janes
Current research concerning self-assembled monolayers (SAM) focuses on the fabrication of microelectronics utilizing a semiconductor/molecule/metal junction. This study seeks to investigate various experimental techniques for creation of organic monolayers by surface analysis techniques...
A MATLAB code for Hartree Fock calculation of H-H ground state bondlength and energy using STO-4G
08 Aug 2006 | | Contributor(s):: Amritanshu Palaria
Hartree Fock (HF) theory is one of the basic theories underlying the current understanding of the electronic structure of materials. It is a simple non-relativistic treatment of many electron system that accounts for the antisymmetric (fermion) nature of electronic wavefunction but does not...
Nanotubes and Nanowires: One-dimensional Materials
17 Jul 2006 |
What is a nanowire? What is a nanotube? Why are they interesting and what are their potential applications? How are they made? This presentation is intended to begin to answer these questions while introducing some fundamental concepts such as wave-particle duality, quantum confinement, the...
Vector Free Energy Calculation with Adaptive Biasing Force
18 Jun 2006 | | Contributor(s):: Eric F Darve
This presentation discusses recent numerical methods to calculate thefree energy as a function of a reaction coordinate for bio-molecules.Free energy is often called potential of mean force and represents theeffective potential experienced by a generalized coordinate for abio-molecular system....
First Principles-Based Modeling of materials: Towards Computational Materials Design
20 Apr 2006 | | Contributor(s):: Alejandro Strachan
Molecular dynamics (MD) simulations with accurate, first principles-based interatomic potentials is a powerful tool to uncover and characterize the molecular-level mechanisms that govern the chemical, mechanical and optical properties of materials. Such fundamental understanding is critical to...
The Rush to Market, Lack of Knowledge, and Public Trust
11 Apr 2006 |
What should rivet our attention now is the rush to get nano products into the market long before the nanoscale phenomena these products exploit are understood. Nanoscale materials often present unusual structures and activities as compared to ordinary-scale amounts of the same material. Research...
EDA Challenges in Nanoscale Design: A Synopsys Perspective
Rich Goldman gives an overview of the current state ofthe semiconductor and EDA (Electronic Design Automation) industry with aspecial focus on the impact of nanometer scale design on design tools andthe economics of the industry.
The Long and Short of Pick-up Stick Transistors: A Promising Technology for Nano- and Macro-Electronics
11 Apr 2006 | | Contributor(s):: Muhammad A. Alam
In recent years, there has been enormous interest in the emerging field of large-area macro-electronics, and fabricating thin-film transistors on flexible substrates. This talk will cover recent work in developing a comprehensive theoretical framework to describe the performance of these...
Tutorial on Using Micelle-MD
05 Apr 2006 | | Contributor(s):: Patrick Chiu, Kunal Shah, Susan Sinnott
This is a tutorial using Micelle-MD. This includes the main capabilities, computation procedure, with format of files generated, and the simulation setup, which includes the material models implemented.
Mechanical Properties of Surfactant Aggregates at Water-Solid Interfaces
This is a talk on the mechanical properties of surfactant aggregates at water-solid interfaces using Micelle-MD. This includes silica indentations of micelles with comparison to experimental data and graphite indentation of Micelle.
Mark Ratner Interview on Nanotechnology
23 Mar 2006 | | Contributor(s):: Mark Ratner, Krishna Madhavan
Nanotechnology interview with Krishna Madhavan.
Engineering Nanomedical Systems
06 Mar 2006 | | Contributor(s):: James Leary
This tutorial discusses general problems and approaches to the design of engineered nanomedical systems. One example given is the engineering design of programmable multilayered nanoparticles (PMNP) to control a multi-sequence process of targeting to rare cells in-vivo, re-targeting to...