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A Primer on Scanning Tunneling Microscopy (STM)
04 Apr 2006 | | Contributor(s):: Ron Reifenberger
Scanning Probe Microscopes and their remarkable ability to provide three-dimensional maps of surfaces at the nanometer length scale have arguably been the most important tool in establishing the world-wide emergence of Nanotechnology. In this talk, the fundamental ideas behind the first scanning...
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Electron and Ion Microscopies as Characterization Tools for Nanoscience and Nanotechnology
27 Feb 2006 | | Contributor(s):: Eric Stach
This tutorial presents a broad overview of the basic physical principles of techniques used in scanning electron microscopy (SEM), as well as their application to understanding processing/structure/property relationships in nanostructured materials. Special emphasis is placed on the capabilities...
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Metal Oxide Nanowires: Synthesis, Characterization and Device Applications
07 Mar 2006 | | Contributor(s):: Jia Grace Lu
Various metal oxide nanowires, such as ZnO, SnO2, Fe2O3, In2O3 and Ga2O3, have been synthesized by chemical vapor deposition method. Their structures and properties are characterized by TEM, SEM, XRD, AFM, photoluminescence, photoconductance, scanning surface potential microscopy, and electrical...
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Making the Tiniest and Fastest Transistor using Atomic Layer Deposition (ALD)
13 Feb 2006 | | Contributor(s):: peide ye
Atomic layer deposition (ALD) is an emerging nanotechnology enables the deposit of ultrathin films, one atomic layer by one atomic layer. ALD provides a powerful, new capability to grow or regrow nanoscale ultrathin films of metals, semiconductors and insulators. This presentation introduces ALD...
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Designing Nanocomposite Materials for Solid-State Energy Conversion
10 Nov 2005 | | Contributor(s):: Timothy D. Sands
New materials will be necessary to break through today's performance envelopes for solid-state energy conversion devices ranging from LED-based solid-state white lamps to thermoelectric devices for solid-state refrigeration and electric power generation. The combination of recent materials...
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Molecular Beam Epitaxy
16 Nov 2005 | | Contributor(s):: John C. Bean
Microelectronic devices are made by repeating two steps: 1) Depositing a thin uniform layer of material; 2) Then using a photographic process to pattern and remove unwanted areas of that layer.
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Scanning Electron Microscope
16 Nov 2005 | | Contributor(s):: John C. Bean
This resource describes a scanning electron microscope (SEM). It includes detailed depictions of how the electron beam is focused and used to create hugely magnified images of experimental specimens.
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Scanning Probe Microscope Piezoelectric Crystals
16 Nov 2005 | | Contributor(s):: John C. Bean
In this resource we disassemble the piezoelectric assembly of a scanning probe microscope. At its core is a white cylinder of the piezoelectric material. If you look closely, it has a granular texture that reflects the fact that it is actually made up of many small crystals.
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Scanning Probe Microscope Operation
16 Nov 2005 | | Contributor(s):: John C. Bean
Scanning Probe Microscopes (SPMs) include Atomic Force Microscopes (AFMs) and Scanning Tunneling Microscopes (STMs or STEMs). They are the only instruments in widespread use that can actually "see" single atoms! You can skim this resource quickly to learn the general concepts of SPMs, or you can...
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Fabrication of a MOSFET within a Microprocessor
16 Nov 2005 | | Contributor(s):: John C. Bean
This resource depicts the step-by-step process by which the transistors of an integrated circuit are made.
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Designing Nanocomposite Thermoelectric Materials
08 Nov 2005 | | Contributor(s):: Timothy D. Sands
This tutorial reviews recent strategies for designing high-ZT nanostructured materials, including superlattices, embedded quantum dots, and nanowire composites. The tutorial highlights the challenges inherent to coupled electronic and thermal transport properties.
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Laser Cooling of Solids
06 Oct 2005 | | Contributor(s):: Massoud Kaviany
Enhanced laser cooling of ion doped nanocrystalline powders (e.g., Yb3+: Y2O3) can be achieved by enhancing the anti-Stokes, off-resonance absorption, which is proportional to the three design-controlled factors, namely, dopant concentration, pumping field energy, and anti-Stokes transition rate....
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Semiconductor Interfaces at the Nanoscale
17 Oct 2005 | | Contributor(s):: David Janes
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,...
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Measurement of Single Molecule Conductance using STM-Based Break Junctions
28 Jul 2005 | | Contributor(s):: Nongjian Tao
We have measured single molecule conductance using a combined STM- and conducting AFM-based break junction method. The method works in aqueous solutions, which is suitable for biologically relevant molecules such as DNA and peptides, and also allows us to control electron transport through redox...
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Probing Silicon-Based Molecular Electronics with Scanning Tunneling Microscopy
29 Jul 2005 | | Contributor(s):: Mark Hersam
In recent years, substantial progress has occurred in the field of molecular electronics [1]. In this paper, charge transport through molecule-semiconductor junctions is probed with ultra-high vacuum (UHV) scanning tunneling microscopy (STM). The presence of the semiconductor band gap enables new...
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Synthetic and Processing Strategies to New Molecular and Polymeric...
28 Jul 2005 | | Contributor(s):: Antonio Facchetti, Tobin Marks
Recent achievements in the design and synthesis of new arene/heteroaromatic oligomers/molecules functionalized with a variety of phenacyl, alkylcarbonyl, and perfluoroalkylcarbonyl will be presented. These organic semiconductors exhibit low-lying LUMOs allowing efficient electron...
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Towards Molecular Electronic Circuitry: Selective Deposition of Metals on Patterned ...
28 Jul 2005 | | Contributor(s):: Amy Walker
We have developed a robust method by which to construct complex two- and three- dimensional structures based on controlling interfacial chemistry. This work has important applications in molecular/organic electronics, sensing, and other technologies. Our method is extensible to many different...
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Nanomanufacturing: Top-Down and Bottom-Up
14 Mar 2005 | | Contributor(s):: EPICS LSPM Team
Martin presents an overview of nanomanufacturing techniques, explaining the difference between top-down and bottom-up approaches.
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Scanning Probe Microscopes
15 Mar 2005 | | Contributor(s):: EPICS LSPM Team
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.
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Probing Molecular Conduction with Scanning Probe Microscopy
08 Jul 2004 | | Contributor(s):: Mark Hersam
This tutorial will provide an overview of scanning probe microscopy (SPM) andits application towards problems in molecular conduction. In an effort to communicatethe power and limitations of these instruments, the tutorial will describe designconsiderations and reveal the detailed construction of...