Tags: surfaces

Online Presentations (21-40 of 44)

  1. Use of Ceramic based biomaterials for their application in vitro osteogenic differentiation

    30 Jul 2008 | | Contributor(s):: Gopal Pande

    The use of bioceramics for preparation of implants and prosthesis for applications in orthopedic surgery has been done over several years. Recently new formulations for making substrates and coatings using ceramic material such as alumina, bioglass or zirconia have been done for improved...

  2. Multiplex Detection of Cell Surface Markers using Plasmonic Sensors

    21 Jul 2008 | | Contributor(s):: Joseph M K Irudayaraj

    Gold nanorod molecular probes (GNrMPs) were designed and fabricated for multiplex identification of cell surface markers in HBECs. Cells were probed directly using dark field microscopy integrated with a spectral imager for simultaneous detection of up to three surface markers. The...

  3. High-Aspect-Ratio Micromachining of Titanium: Enabling New Functionality and Opportunity in Micromechanical Systems Through Greater Materials Selection

    18 Jun 2008 | | Contributor(s):: Masa Rao

    Traditionally, materials selection has been limited in high-aspect-ratio micromechanical applications, due primarily to the predominance of microfabrication processes and infrastructure dedicated to silicon. While silicon has proven to be an excellent material for many of these applications, no...

  4. Basics of Particle Adhesion

    21 May 2008 | | Contributor(s):: Stephen P. Beaudoin

    This presentation will describe the adhesion of rough, asymmetric particles with micro- to nano-scale dimension to solid surfaces. These adhesion processes are of great interest in microelectronics and pharmaceutical manufacturing. The presentation will include experimental and theoretical and...

  5. Nanotechnology Research Opportunities within the Forest Products Industry

    28 Apr 2008 | | Contributor(s):: Robert J. Moon

    This talk will provide an overview of research opportunities withinforest products industry. There will be a general description of theanatomical and chemical structure of wood, their connection to wood's anisotropic properties and how nanotechnology research can be applied to provide unique...

  6. Nanomedicine for Treating Organ Failure

    02 Jan 2008 |

    Nanotechnology has begun to revolutionize numerous science and engineering fields. The use of nanotechnology in medicine has been termed nanomedicine. This presentation will highlight recent advancements in the treating of organ failures (such as orthopedic, vascular, cartilage, central and...

  7. Excellence in Computer Simulation: Computational Materials

    20 Dec 2007 | | Contributor(s):: Eric Schwegler

    This presentation was one of 13 presentations in the one-day forum, "Excellence in Computer Simulation," which brought together a broad set of experts to reflect on the future of computational science and engineering.

  8. MCW07 Impact of Porphyrin Functional Groups on InAs Gas Sensors

    05 Nov 2007 | | Contributor(s):: Michael Garcia

    Porphyrin molecules are often used for sensor engineering to improve sensitivity and selectivity to specific analytes. It is important to understand how the porphyrin HOMO-LUMO levels deplete surface states during functionalization of solid state sensors. Additionally, the effect of...

  9. KIST/PU Design and Performance of Bioresponsive Nanocarriers with Tunable Reactivity for Drug and Gene Delivery

    23 Oct 2007 | | Contributor(s):: Dave Thompson

    Our lab has focused on the development of bioresponsive nanocarriers that are designed to release their cargo upon entry into acidic environments such as those found in cellular endosomes and sites of poor circulation. Computational methods have been used to design vinyl ether lipids of varying...

  10. BME 695N Lecture 12: Introduction to X-ray Photoelectron Spectroscopy and the Examples of Biologically-Relevant Applications

    19 Oct 2007 | | Contributor(s):: Dmitry Zemlyanov

    With Dmitry Zemlyanov as guest lecturer.

  11. Energy-level Alignment of Aryl Thiols Chemisorbed on Metal Surfaces: Implications for Molecular Electronic Junctions

    27 Sep 2007 | | Contributor(s):: Roger D. van Zee

    Charge-transport through the interface is a key part of the behavior of any electronic junction. One interface property important to molecular-electronic junctions is the energetic mismatch between the conductive levels of the molecule and the Fermi level of the contact material. This seminar...

  12. MCW07 Conductance Switching in Fluorene/TiO2 Molecular Heterojunctions

    13 Sep 2007 | | Contributor(s):: Richard L.McCreery

    Molecular junctions consisting of a monolayer of fluorene and 10 nm of TiO2 between conducting contacts exhibit a memory effect upon positive polarization of the of the TiO2 for a few milliseconds. The junction conductance increases for a period of several minutes, but can be “erased” by a...

  13. MCW07 Electronic Level Alignment at Metal-Molecule Contacts with a GW Approach

    05 Sep 2007 | | Contributor(s):: Jeffrey B. Neaton

    Most recent theoretical studies of electron transport in single-molecule junctions rely on a Landauer approach, simplified to treat electron-electron interactions at a mean-field level within density functional theory (DFT). While this framework has proven relatively accurate for certain...

  14. Micro-scaled Biochips with Optically Active Surfaces for Near and Far-field Analysis of Cellular Fluorescence

    31 Aug 2007 | | Contributor(s):: Huw Summers

    The integration of thin (< 100 nm) metal films with micro-scaleoptical waveguides provides a route to controlled spatialexcitation of cellular fluorescence within a biochip platform.Surface bound electron-plasma oscillations (surface plasmon waves)interact with photons to produce an...

  15. Oligodeoxyribonucleotide Association with Single-Walled Carbon Nanotubes

    02 Aug 2007 | | Contributor(s):: Jennifer McDonald

    Commercially available single-walled carbon nanotubes (SWCNTs) tend to aggregate as ropes and bundles during production making them of little use in many scientific and industrial applications. An effective technique for dispersing and solubilizing SWCNTs is required to fully utilize their...

  16. SPMW A fresh look to amplitude-modulation AFM: Force minimization, interaction measurement, and the quest for high resolution

    05 Jan 2007 | | Contributor(s):: Udo D. Schwarz

    Frequency modulation atomic force microscopy (FM-AFM) has been able to deliver high-resolution atomic-scale images in ultrahigh vacuum for over one decade. In addition, there have been recent reports where atomic resolution has been achieved in air and liquids using FM-AFM [1]. Achieving...

  17. Orbital Mediated Tunneling in a New Unimolecular Rectifier

    25 May 2007 | | Contributor(s):: Robert Metzger, NCN at Northwestern University

    In 1997 we showed that hexadecylquinolinium tricyanoquinodimethanide is a unimolecular rectifier, by scanning tunneling microscopy and also as a Langmuir-Blodgett (LB) monolayer, sandwiched between Al electrodes. We have now seen rectification in a new molecule: this rectification can be...

  18. Introduction to X-ray Photoelectron Spectroscopy and to XPS Applications

    17 May 2007 | | Contributor(s):: Dmitry Zemlyanov

    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...

  19. Understanding Deformation Processes in Nanocrystalline Metals Through the Use of Real-time Electron Microscopy Techniques

    03 May 2007 | | Contributor(s):: Eric Stach

    It is has long been known that the grain size of a material has a substantial effect on its mechanical strength, through the well-established Hall-Petch relationship. In the past decade or so, there has been a resurgence of interest in this topic resulting from the ability to create metals with...

  20. Introduction to X-ray Photoelectron Spectroscopy and XPS Application for Biologically Related Objects

    14 Feb 2007 | | Contributor(s):: Dmitry Zemlyanov

    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 becomes widely used for studies of the properties of atoms, molecules, solids, and surfaces. The main...