
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 multisequence process of targeting to rare cells invivo, retargeting to...

Excited State Spectroscopy of a Quantum Dot Molecule
16 Dec 2011   Contributor(s):: Muhammad Usman
Atomistic electronic structure calculations are performed to study the coherent interdot couplings of the electronic states in a single InGaAs quantum dot molecule. The experimentally observed excitonic spectrum by Krenner et al (Phys. Rev. Lett. 94 057402, 2005) is quantitatively reproduced,...

Finite Size Scaling and Quantum Criticality
02 Jan 2008   Contributor(s):: Sabre Kais
In statistical mechanics, the finite size scaling method provides a systematic way to extrapolate information about criticality obtained from a finite system to the thermodynamic limit. For quantum systems, the finite size corresponds not to the spatial dimension but to the number of elements in...

HPC and Visualization for multimillion atom simulations
21 Jun 2005   Contributor(s):: Gerhard Klimeck
This presentation gives an overview of the HPC and visulaization efforts involving multimillion atom simulations for the June 2005 NSF site visit to the Network for Computational Nanotechnology.

Illinois ECE598XL Semiconductor Nanotechnology  3  Quantum Dots: Formation
15 Jun 2011   Contributor(s):: Xiuling Li

Introduction to Coulomb Blockade Lab
31 Mar 2008   Contributor(s):: Bhaskaran Muralidharan, Xufeng Wang, Gerhard Klimeck
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...

Introduction to Quantum Dot Lab
31 Mar 2008   Contributor(s):: Sunhee Lee, Hoon Ryu, Gerhard Klimeck
The nanoHUB tool "Quantum Dot Lab" allows users to compute the quantum mechanical "particle in a box" problem for a variety of differentconfinement shapes, such as boxes, ellipsoids, disks, and pyramids. Users can explore, interactively, the energy spectrum and orbital shapes of new quantized...

KIST/PU MultiComponent, MultiFunctional Nanomedical Systems for Drug/Gene Delivery
23 Oct 2007   Contributor(s):: James Leary
In this brief paper we describe some of our recent efforts to construct multicomponent, multifunctional nanomedical systems for delivery of therapeutic genes. We first describe the general philosophy of our approach. Then we describe three specific aspects of the overall construction in simple...

MCW07 Physics of Contact Induced Current Asymmetry in Transport Through Molecules
25 Feb 2008   Contributor(s):: Bhaskaran Muralidharan, owen miller, Neeti Kapur, Avik Ghosh, Supriyo Datta
We first outline the qualitatively different physics involved in the charginginduced current asymmetries in molecular conductors operating in the strongly coupled (weakly interacting) selfconsistent field (SCF) and the weakly coupled (strongly interacting) Coulomb Blockade (CB) regimes. The CB...

MCW07 Simple Models for Molecular Transport Junctions
13 Sep 2007   Contributor(s):: , Abraham Nitzan, Mark Ratner
We review our recent research on role of interactions in molecular transport junctions. We consider simple models within nonequilibrium Green function approach (NEGF) in steadystate regime.

Microscaled Biochips with Optically Active Surfaces for Near and Farfield Analysis of Cellular Fluorescence
31 Aug 2007   Contributor(s):: Huw Summers
The integration of thin (< 100 nm) metal films with microscaleoptical waveguides provides a route to controlled spatialexcitation of cellular fluorescence within a biochip platform.Surface bound electronplasma oscillations (surface plasmon waves)interact with photons to produce an...

Modeling the quantum dot growth in the continuum approximation
12 Jan 2011   Contributor(s):: Peter Cendula
Quantum dots can grow spontaneously during molecular beam epitaxy oftwo materials with different lattice parameters, StranskiKrastanow growth mode.We study a mathematical model based on the continuum approximation of thegrowing layer in two dimensions. Nonlinear evolution equation is solved...

Molecular Transport Structures: Elastic Scattering, Vibronic Effects and Beyond
13 Feb 2006   Contributor(s):: Mark Ratner, Abraham Nitzan,
Current experimental efforts are clarifying quite beautifully the nature of charge transport in socalled molecular junctions, in which a single molecule provides the channel for current flow between two electrodes. The theoretical modeling of such structures is challenging, because of the...

Nano Carbon: From ballistic transistors to atomic drumheads
14 May 2008   Contributor(s):: Paul L. McEuen
Carbon takes many forms, from precious diamonds to lowly graphite. Surprisingly, it is the latter that is the most prized by nano physicists. Graphene, a single layer of graphite, can serve as an impenetrable membrane a single atom thick. Rolled up into a nanometerdiameter cylindera carbon...

Nanobiotechnology – a different perspective
22 Jul 2008   Contributor(s):: Murali Sastry
The study of the synthesis, exotic properties, assembly/packaging and potential commercial application of nanomaterials is an extremely important topic of research that is expected to have farreaching global impact. The focus of my talk will be on an emerging branch of nanotechnology that...

Nanoelectronic Modeling Lecture 28: Introduction to Quantum Dots and Modeling Needs/Requirements
20 Jul 2010   Contributor(s):: Gerhard Klimeck
This presentation provides a very high level software overview of NEMO1D.Learning Objectives:This lecture provides a very high level overview of quantum dots. The main issues and questions that are addressed are:Length scale of quantum dotsDefinition of a quantum dotQuantum dot examples and...

Nanoelectronic Modeling Lecture 29: Introduction to the NEMO3D Tool
04 Aug 2010   Contributor(s):: Gerhard Klimeck
This presentation provides a very high level software overview of NEMO3D. The items discussed are:Modeling Agenda and MotivationTightBinding Motivation and basic formula expressionsTight binding representation of strainSoftware structureNEMO3D algorithm flow NEMO3D parallelization scheme –...

Nanoelectronic Modeling Lecture 31a: LongRange Strain in InGaAs Quantum Dots
04 Aug 2010   Contributor(s):: Gerhard Klimeck
This presentation demonstrates the importance of longrange strain in quantum dotsNumerical analysis of the importance of the buffer around the central quantum dot  local band edges – vertical and horizontal extension of the bufferControlled overgrowth can tune the electron energies in the...

Nanoelectronic Modeling Lecture 32: Strain Layer Design through Quantum Dot TCAD
04 Aug 2010   Contributor(s):: Gerhard Klimeck, Muhammad Usman
This presentation demonstrates the utilization of NEMO3D to understand complex experimental data of embedded InAs quantum dots that are selectively overgrown with a strain reducing InGaAs layer. Different alloy concentrations of the strain layer tune the optical emission and absorption...

Nanoelectronic Modeling Lecture 34: Alloy Disorder in Quantum Dots
05 Aug 2010   Contributor(s):: Gerhard Klimeck, Timothy Boykin, Chris Bowen
This presentation discusses the consequences of Alloy Disorder in strained InGaAs Quantum Dots Reminder of the origin of bandstructure and bandstructure engineeringWhat happens when there is disorder?Concept of disorder in the local bandstructureConfiguration noise, concentration noise,...