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SIMULATE with over 330 tools for nanoelectronics, nanophotonics and more ›

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A resource for nanoscience and nanotechnology, nanoHUB.org was created by the NSF-funded Network for Computational Nanotechnology.

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### Popular topicsTrending topics

• Fermi-Dirac Statistics 8 Presentations
• Newton's Law Basics 10 Presentations
• CMOS Process Steps 4 Course Lectures, 1 Learning Module, 1 Presentation, 1 Teaching Material, 1 Tutorial
• #### Course Lectures

• ECE 612 Lecture 18A: CMOS Process Steps

• ECE 612 Lecture 18B: CMOS Process Flow

• Lecture 1: Review of MOSFET Fundamentals

A quick review of the traditional theory of the MOSFET along with a review of key device performance metrics. A short discussion of the limits of the traditional (drift-diffusion) approach and the meaning of ballistic transport is also included.
• The Nano-MOSFET: A brief introduction

MOSFET channel lengths are now well below 100nm, and getting smaller, but MOSFETs are still modeled and understood much as they were 30 years ago. Seminal work in the 1960’s laid the foundation for our understanding of the MOSFET, but traditional approaches are based on concepts that lose validity at the nanoscale. This talk is a brief introduction to a new approach that provides a sound conceptual foundation for understanding nanoscale MOSFETs.

#### Presentations

• MOSFET Operation Description

This set of slides gives the students basic understanding of MOSFET operation description.www.eas.asu.edu/~vasileskNSF Career

#### Teaching Materials

• Poisson Equation Solvers - General Considerations

We describe the need for numerical modeling, the finite difference method, the conversion from continuous set to set of matrix equations, types of solvers for solving sparse matrix equations of the form Ax=b that result, for example, from the finite difference discretization of the Poisson Equation.

#### Tutorials

• A Primer on Semiconductor Device Simulation

Computer simulation is now an essential tool for the research and development of semiconductor processes and devices, but to use a simulation tool intelligently, one must know what\'s \"under the hood.\" This talk is a tutorial introduction designed for someone using semiconductor device simulation for the first time. After reviewing the semiconductor equations, I will briefly describe how one solves them \"exactly\" on a computer. I\'ll then discuss an example device simulation program and conclude with some thoughts about how to effectively use simulation in practice.
• Thin Film Solar Cells 4 Presentations, 3 Course Lectures, 1 Paper
• Charging Effects 6 Course Lectures, 2 Teaching Materials

#### Teaching Materials

• ECE 495N: Fundamentals of Nanoelectronics Lecture Notes (Fall 2009)

Lecture notes for the Fall 2009 teaching of ECE 495: Fundamentals of Nanoelectronics.
• Introduction to Coulomb Blockade Lab

The tutorial is based on the Coulomb Blockade Lab available online at Coulomb Blockade Lab. Students are introduced to the concepts of level broadening and charging energies in artificial atoms (single quantum dots) and molecules (coupled quantum dots). A tutorial level introduction to the underlying theory can be found in chapters 5 and 6 of “Electron-Phonon and Electron-Electron Interactions in Quantum Transport”, Gerhard Klimeck, Ph.D. thesis, Purdue University, 1994. NCN@Purdue[1] ...
• Nanoscale Semiconductor Interfaces 2 Presentations, 1 Learning Module, 1 Tutorial
• #### Learning Modules

• Introduction to Carbon Nanotube Electronics

Carbon nanotubes (CNT) have interesting, structure-dependent electronic properties. In particular, CNTs can be a metallic or semiconducting depending on the way in which the carbon atoms are arranged in the CNT walls. The purpose of this learning module is to familiarize students with the basic concepts associated with CNT electronic properties. It begins with a pre-test to assess initial student knowledge of the topic, followed by a presentation and reading material on the electronic properties of CNTs. This is followed by some exercises that utilize the CNTbands tool on the nanoHUB for computing key electronic properties of CNTs. Finally, a post-test is administered to determine the degree to which the module assisted in student learning of the fundamental concepts associated with the electronic properties of CNTs.

#### Tutorials

• Semiconductor Interfaces at the Nanoscale

The trend in downscaling of electronic devices and the need to add functionalities such as sensing and nonvolatile memory to existing circuitry dictate that new approaches be developed for device structures and fabrication technologies. Various device technologies are being investigated, including nanotube/nanowire transistors, molecular electronic components and electrical/mechanical sensor platforms.
• Schottky Diodes 5 Presentations, 3 Course Lectures
• Atomic Force Microscopy 6 Presentations, 1 Tutorial
• Density States 7 Course Lectures, 2 Presentations, 1 Teaching Material
• Scanning Probe Microscopy 4 Animations, 2 Tutorials, 1 Course Lecture, 1 Presentation
• #### Animations

• Diffusion of holes and electrons

Diffusion is a process of particles distributing themselves from regions of high- to low- concentrations. In semi-classical electronics these particles are the charge carriers (electrons and holes). The rate at which a carrier can diffuse is called diffusion constant with units of cm2/s. The image shows the process of steady state diffusion in an intrinsic semiconductor bar with different light shining intensity (different carrier generations rates /cm3) at the center of the bar. &#8230;
• Local density of states

The concept of general density of states (DOS) in devices is, by definition, spatially invariant. However, in the case of inhomogeneous materials or in quantum confined structures, the density of states can be resolved in space. This is known as local density of states, or LDOS. &#8230;
• Piece-Wise Constant Potential Barriers Tool Demonstration: Bandstructure Formation with Finite Superlattices

This video shows the simulation and analysis of a systems with a series of potential barriers. Several powerful analytic features of Piece-wise Constant Potential Barrier Tool (PCPBT) are demonstrated.
• Scanning Probe Microscopes

Laura explains how scanning probe microscopes can be used to create images of small devices, molecules, and even atoms! A large-scale version of the scanning probe microscope is built out of Legos to show the basic principles.

#### Tutorials

• Introduction to X-ray Photoelectron Spectroscopy and to XPS Applications

X-ray Photoelectron Spectroscopy (XPS), which is known as Electron Spectroscopy for Chemical Analysis (ESCA), is a powerful research tool for the study of the surface of solids. The technique is widely used for studies of the properties of atoms, molecules, solids, and surfaces. The main success of the XPS technique is associated with studies of the physical and chemical phenomena on the surface of solids. These investigations were limited by relatively simple inorganic reactions and not many biologically related objects were approached by XPS. There are impartial reasons for low involvement of XPS into investigations of biologically related objects. In this presentation successful examples of XPS studies of bio-related specimens will be presented. In particular, the systematic XPS investigation of four peptide-silane and peptide- silane hybrid sol-gel thin films prepared under biologically benign conditions will be reported. This work demonstrates a use for XPS to characterized biologically inspired surfaces, providing critical information on peptide coverage on the surface of the materials. The self-assembling layer characterization will be considered on the examples of thiols on Au and aryl diazonium molecules on Si(111).

In this tutorial, I will present a brief overview of the ways that transmission electron microscopy can be used to characterize nanoscale materials. This tutorial will emphasize what TEM does well, as well where difficulties arise. In particular, I will discuss in an overview manner how diffraction, imaging and spectroscopy function in the TEM, and how these techniques can be combined to provide a detailed characterization of nanoscale structures. Some emphasis on sample preparation requirements, image artifacts and low sampling statistics will be detailed as well. I hope that at the end of this brief tutorial, you will have a better sense as to when the TEM might help you answer particular questions in your research.
• Introduction To Bio-NEMS Bionanotechnology 5 Tutorials
• Cyclic Peptide Nanotubes 3 Course Lectures, 2 Presentations, 1 Research Seminar

#### Presentations

• Aluminum: a safe, economical, high energy density material for energy storage, transport and splitting water to make hydrogen on demand

In 1968, a team lead by the author discovered that liquid gallium saturated with aluminum at room temperature would split water into hydrogen gas, alumina and heat. More recently his current team has discovered that bulk, solid Al rich alloys will also split water in the same manner. Since 1) the energy density of Al via the water splitting reaction is 8.6 kW-hr/kg (as hydrogen plus heat), 2) Al is plentiful both as 400 billion kg of scrap metal lying on the planet\'s surface and is currently produced in large quantities at world-wide foundries via the electrolysis of alumina, 3) the small concentrations of the Ga or (Ga,Sn,In) in the Al alloy are inert and totally recoverable, simple calculations show that Al rich alloys could be an economically viable enabler for a potable large scale hydrogen economy. This presentation will focus on our current research aimed at understanding how and why our bulk alloys work. We will also, discuss some of the more sensible applications for this technology.
• ECE 656 Lecture 41: Transport in a Nutshell

#### Research Seminars

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• nanoHUB-U : Your source for cutting-edge topics distilled into short lectures with quizzes, homework, practice exams.
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I take courses on nanoHUB.org to understand the device semiconductor physics needed to design and prototype nano devices, and the courses on nanoHUB ...»

Jay Morreale, p-brane LLC (2012) -

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### NCN News

 Mar06 Simulations provide new insight into emerging nanoelectronic device Prof. Alejandro Strachan and group members Nicolas Onofrio and David … Mar04 From massive supercomputers come tiniest transistors NCN Director, Gerhard Klimeck, and his group work … Oct15 nanoHUB.org listed as one of the 50 top resources to learn electrical engineering nanoHUB.org was featured as one of the top 50 resources to learn …