Nanotechnology : West Lafayette

Network for Computational Nanotechnology ( NCN )

Benj — Sat, 02 Sep 2006 11:55:33 +0000

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Web url

http://www.ncn.purdue.edu/

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Purdue University, Birck Nanotechnology Center, 1205 West State Street, Box 1006

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47907-2057

Telephone

765.494.7715

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765.494.0811

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While addressing challenges in nanotechnology NCN researchers produce new algorithms, approaches, and software tools with capabilities not yet available commercially. As part of the NSF's infrastructure for the National Nanotechnology Initiative, the NCN engages the community through workshops and seminars and novel educational resources.

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Purdue University : Center for Nanoscale Devices

Benj — Sun, 20 Aug 2006 13:05:37 +0000

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http://www.nanodevices.ecn.purdue.edu/index.html

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Purdue University, School of Electrical and Computer Engineering, 465 Northwestern Ave.

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47907-2035

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Our Mission :

Nanotechnology, the ability to work at the molecular level, atom by atom to create materials and structures with new capabilities, will fundamentally change electronics, computers, medicine, biotechnology, and many other industries.

Our mission is to explore the science of nanostructures and new materials, to develop the enabling technology for producing new classes of electronic and biological devices, to educate the scientists and engineers who will carry this vision forward, and to promote economic development in these newly emerging fields.

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Patents

Gerhard Klimeck Research Group at Purdue

Benj — Sat, 19 Aug 2006 15:30:08 +0000

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Web url

http://dynamo.ecn.purdue.edu/~gekco/

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Electrical Engineering Building, Room 313B, 465 Northwestern Avenue

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47907-2035

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(765) 494-9212

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(765) 494-6441

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Atomistic Nanoelectronic Modeling in 3-D - Prototype development of a bottom-up nanoelectronic modeling tool that enables the analysis of the electronic structure in a nano-scale system based on the representation of each individual atom in the structure. This simulator will enable the analysis of the electronic structure and optical response in a variety of different crystal structures and material systems. The first structures that are analyzed are quantum dots. However, general nanoscale electronics problems such as interface roughness, randomized impurities and radiation effects are to be tackled as well. Demonstrated the simulation of a system as large as 32 million atoms. Parallelized the simulator on a Linux-based Beowulf system. Studied effects due to atomic alloy disorder and interface interdiffusion in quantum dots. [33, 36, 39, I21-I31]. Optimized material parameters (see below) resulted in good experimental agreement for optical transitions in colloidal quantum dots [33,38].

Parallelization of Mars Imaging Software (MER) - Convert existing serial Mars imaging software (e.g. mosaic generation from many images, left/right eye correlation for two images) to efficient parallel code. Hardware: COTS Linux-based pentium III cluster (beowulf) using MPI. Achieved time reductions from original baseline of 90 minutes to 3 minutes (mosaic software) and 90 minutes to 6 minutes (correlator). This order of magnitude speed-up enables fast feedback to mars rover control. [P29,P32]

Genetic Algorithm-Based Optimization and Synthesis - Develop an optimization and synthesis tool based on a massively parallel genetic algorithm (GA) and incorporate various high level simulation tools into the tool box.
Electron device synthesis: solved the reverse resonant tunneling diode design problem - what is the structure that will generate a particular current-voltage characteristic? NEMO + GA [P18,P20].

Circuit synthesis: what is the circuit configuration on an FPGA to achieve a Gaussian pulse response? SPICE + GA [P22,P23].

Optical filter synthesis: what is the best pattern on a frequency selective surface to achieve optimal transmission and reflection? [P19,P21]

Material Science: what is the best parameterization of a tight banding bandstructure model to achieve the proper representation of basic material properties such as bandgaps and effective masses? NEMO+GA [28,29,36,37]

High Performance Computing Extensions to NEMO 1-D - Parallelize existing NEMO 1-D software on various simultaneous levels using MPI. Ported parallel code to SGI and beowulf massively parallel machines. Achieve unprecedented high fidelity resolution of carrier transport through 1-D heterostructures and uncovered quite unintuitive quantum transport phenomena [30,40,32].

Develop Tight-Binding Model Theory - Collaborate with Prof. Tim Boykin on the fundamental understanding of tight binding models and their applications to quantum transport simulations

Comprehensive Quantum Electron Transport - Principal designer and developer of the NEMO software. NEMO is the worlds first comprehensive 1-D quantum electron transport simulator including effects due to charging, multiple bands and scattering. NEMO has shown predictive capabilities useful for devices design and analysis. The worldТ’s first high-bias quantum mechanical, simulations of scattering enhanced charging and charge self-consistency of holes and electrons [9-24,P4-P17] for RTDs were generated.

High Bias Coulomb Blockade - Initiated analysis of high bias transport in quantum dots. Key investigator of Coulomb blockade at Purdue University [8,P1].

Linear Response of Coupled Quantum Dots - Proposed experiment on conductance spectroscopy in coupled quantum dots and analyzed experimental feasibility [6,7]. This work is cited over 70 times!

Scattering - Studied the scattering enhanced valley current in RTDs [4,5].

2-D Linear Response - Analyzed anomalous Quantum Hall Effect in 2-D electron gas syst. [3].

Laser Noise Experiments - Implemented high frequency (200MHz) laser amplitude modulation circuitry. Developed laser stability controller (15kHz) using an external resonance cavity. Measured the propagation of laser noise through optical systems. Calculated and measured higher order, non-linear laser noise fluctuations [1,2].

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Patents

Purdue University : nanoHub

Benj — Sun, 20 Aug 2006 13:18:32 +0000

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Web url

http://www.nanohub.org/

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Street address

Birck Nanotechnology Center, 1205 West State Street, Box 1006

Zip or postal code

47907-2057

Telephone

765.494.7715

Fax

765.494.0811

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The Network for Computational Nanotechnology seeks to be an example of how theory and simulation can accelerate progress in:

* nano-electronics: Reinventing electronics from the "bottom up" while exploring applications in computing, communications, sensing, energy conversion, etc.

* nano-electromechanical systems (NEMS): Making NEMS an engineering discipline by developing design principles and CAD tools while exploring applications in metrology, switching, sensing, and actuation.

* nano-bio device and systems: Exploring applications of nanoelectronics and NEMS to biology and medicine.

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Patents

Purdue University : Birck Nanotechnology Center (BNC)

Benj — Sun, 20 Aug 2006 15:42:30 +0000

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Web url

http://web.e-enterprise.purdue.edu/wps/portal/Nanotechnology

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Purdue University, West Lafayette

Zip or postal code

47907

Telephone

765.494.4600

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Nanotechnology is an emerging science in which new materials and tiny structures are built atom-by-atom, or molecule-by-molecule, instead of the more conventional approach of sculpting parts from pre-existing materials. Nano is a prefix meaning one-billionth, so a nanometer is one-billionth of a meter.
Just as antibiotics, the silicon transistor and plastics affected nearly every aspect of society in the 20th century, nanotechnology is expected to have profound influences in the 21st century.

The possibilities include:

The creation of new materials with superior strength, electrical conductivity, resistance to heat and other properties.

Microscopic machines for a variety of uses, including probes that could be injected into the body for medical diagnostics and repair.

A technology in which biology and electronics are merged, creating bio-chips that detect food-borne contamination, dangerous substances in the blood or chemical warfare agents in the air.

The creation of artificial organs and prosthetics that enhance the quality of life.

The development of "molecular electronics" and devices that "self assemble," similar to the growth of complex organic structures in living organisms. Theoretically, such self-assembling devices could make electronics processing far less expensive than conventional semiconductor processing.

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Patents

Purdue NanoTechnology Initiative (NTI)

Benj — Sun, 20 Aug 2006 20:17:19 +0000

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http://www.physics.purdue.edu/nanophys/nti/

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Purdue University, Purdue NanoTechnology Initiative (NTI)

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47907

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Metallic nanoclusters and molecular wires have been studied for some time as two active but distinct fields of research. We have recently been able to combine the expertise from these two fields to fabricate a Linked Cluster Network (LCN) : a two-dimensional superlattice consisting of nanometer-sized gold clusters electronically linked by pi-conjugated organic molecules (right). The procedure is to first form a monolayer of gold nanocrystals of uniform size which are kept from coalescing by encapsulating each gold cluster in an insulating layer of dodecanethiol ((CH3)12-SH). Next we use pi-conjugated molecules, with functional groups that bond strongly to gold at both ends, to displace the single-ended dodecanethiols. Uniform LCN's of up to 1m x 1Хµm in area have been fabricated using gold clusters and dithiol linking molecules. Their current-voltage characteristics have been measured at different temperatures and shown to exhibit single-electron charging effects even at room temperature. These measurements provide estimates for the resistance of individual molecular wires that correlate well with their theoretical model [1-3].

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Patents

Purdue University : David Janes Group

Benj — Sun, 20 Aug 2006 15:40:31 +0000

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http://www.ece.purdue.edu/~janes/index.htm

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Purdue University : Nanophysics lab

Benj — Sun, 20 Aug 2006 13:03:57 +0000

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Web url

http://www.physics.purdue.edu/nanophys/newpage10-03/

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Dept. of Physics, Purdue University and Center for Sensing Science and Technology

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47907

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The nanophysics lab uses innovative experimental techniques to examine the physical properties of objects in the nanoscale size range, that is, a bit larger than the size of individual atoms. Some interesting physical properties that we measure include the electronic conductivity of small numbers of atoms and molecules, the forces arising between nanoscale objects, and the transition between the quantum behavior exhibited by a few atoms and the bulk properties of a large number of atoms.

Our lab focuses primarily on scanning probe techniques. Our first scanning probe microscope was built in 1986. Since then, we have built a number of scanning tunneling and scanning force microscopes. These instruments are the eyes that allow the study of nanometer-scale objects.

Because we had working scanning probe instruments well before they were commercially available, we have learned to interact with other groups across campus to solve interesting problems. On any given day, we have graduate students from Physics, Chemistry, Electrical Engineering, Biology, Mechanical Engineering or Chemical Engineering that make use of the unique instruments and accumulated expertise that exists in our lab.