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SPMW A fresh look to amplitude-modulation AFM: Force minimization, interaction measurement, and the quest for high resolution
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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 . Achieving...
Amine Linked Single Molecule Circuits: Systematic Measurements & Understanding
02 Jul 2007 | | Contributor(s):: Mark S Hybertsen
Formation and function of well-defined linkages between organic molecules and metallic electrodes has been a key issue in the field of molecular electronics. We recently discovered that the conductance of single molecule junctions formed using gold-amine linkages can be measured reliably and...
Some Remarks to Electrodynamics of Materials with Negative Refraction
26 Jun 2007 | | Contributor(s):: Victor G. Veselago
The negative refraction coefficient n < 0 can be introduced for isotropic materials with anti-parallel directions of phase and group velocities. If some of material can be described by negative n it will have also negative values of both (electrical ε and magnetic μ) permeabilities. In materials...
Victor Veselago Interview on Nanotechnology and Photonics
26 Jun 2007 | | Contributor(s):: Victor G. Veselago, Phillip Fiorini
Nanotechnology and photonics interview with Phillip Fiorini.
Selective Silicon Epitaxy Seen at the Nanometer Scale
14 Jun 2007 | | Contributor(s):: Matthew Mark Sztelle
The presenter introduces NEMS (nanoelectromechanical systems) and STM (Scanning Tunneling Microscopy and continues to present material on Selective Silicon Epitaxy seen at the Nanometer ScaleMatthew M. Sztelle is a Research Assistant in the Scanning Tunneling Microscopy Group at the Beckman...
Piezoelectric Transducers: Strain Sensing and Energy Harvesting (and Frequency Tuning)
15 Jun 2007 | | Contributor(s):: Toshikazu Nishida
Acoustic pressure or mechanical force sensing via piezoelectric coupling is closely related to the harvesting of electrical energy from acoustical and mechanical energy sources. In this talk, mesoscale and microscale piezoelectric transducers for acoustic and vibrational sensing and energy...
Dripping, Jetting, Drops and Wetting: the Magic of Microfluidics
13 Jun 2007 | | Contributor(s):: David A. Weitz
This talk will discuss some of the new opportunities That arises by precisely controlling fluid flow and mixing using microfluidicdevices. I describe studies to elucidate mechanisms of drop formation and use these to create new fluid structures that are difficult to achieve with my other method....
On the Cross Roads of Biology and Nanotechnology – Selective DNA Nanopore Sensors
21 Mar 2007 | | Contributor(s):: Samir Iqbal
The ability to manipulate and identify the properties of singlebiological molecules with the potential of characterizing biologicalprocesses at the most fundamental levels can significantly facilitaterapid diagnostics and therapeutics. Fabrication of solid-statedevices investigating bacteria,...
Charge Transfer Across an Energy Transducing Integral Membrane Protein Complex
31 May 2007 | | Contributor(s):: William A. Cramer
The cytochrome bc complexes of the mitochondrial respiratory and photosynthetic electron transport chains are hetero-oligomeric integral membrane proteins. These proteins are responsible for most of the energy transduction and transport activities across biological membranes. Such complexes...
SPMW AFM at Video Rate and Beyond
16 May 2007 | | Contributor(s):: Mervyn Miles
The particular advantages that atomic force microscopy (AFM) has over other types of microscopy are well-known, but it has the one major disadvantage of low imaging rates in conventional instruments in which each image requires typically a minute or more to collect. This has two major...
Polymers for nanoparticle and nanocrystal formulations for drug delivery
15 May 2007 | | Contributor(s):: Stephen R. Byrn
Nanoparticles hold great promise for drug delivery applications. Nanoparticles might prove to be the only way to bring water insoluble, chemically unstable drugs to market. Because of this, this seminar will summarize the use of polymers to prepare and/or coat nanoparticles. Preliminary studies...
Electron Emission from Nanoscale Carbon Materials
15 May 2007 | | Contributor(s):: Timothy S Fisher
Prior studies on electron emission show possibly beneficial effects ofnanoscale phenomena on energy-conversion characteristics. For example,recent work has shown that the electric field around a nanoscale fieldemission device can increase the average energy of emitted electrons. Weconsider here...
Marital Relationships & Coping with Cancer
11 May 2007 | | Contributor(s):: Cleveland G. Shields
Breast cancer is one of the most prevalent forms of cancer in women. We conducted a cross sectional study of 77 women and their spouses coping with breast cancer. Both couples completed almost identical surveys. We hypothesized that couples who reported higher levels of criticism and avoidance...
SPMW The Nanomechanics of compositional mapping in amplitude modulation AFM
05 Jan 2007 | | Contributor(s):: Ricardo Garcia
Amplitude modulation atomic force microscopy (AM-AFM) has been very successful for imaging with high spatial resolution inorganic as well as soft materials such as polymers, living cells and single biomolecules in their natural environment . The ability of AM-AFM to separate topography from...
Finite Size Scaling and Quantum Criticality
09 May 2007 | | Contributor(s):: Sabre Kais
The study of quantum phase transitions, which are driven by quantum fluctuations as a consequence of Heisenberg's uncertainty principle, continues to be of increasing interest in the fields of condensed matter and atomic and molecular physics. In this field we have established an analogy between...
SPMW FIRAT: A fast and sensitive probe structure for SPM
05 Jan 2007 |
A new SPM probe, called the force sensing integrated readout and active tip (FIRAT), is described and initial experimental results obtained on commercial AFM systems are presented. FIRAT combines a micromachined integrated electrostatic actuator to move the tip and an integrated optical...
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...
BNC Annual Research Symposium: Welcome and Overview
23 Apr 2007 |
This presentation is part of a collection of presentations describing the projects, people, and capabilities enhanced by research performed in the Birck Center, and a look at plans for the upcoming year.
BNC Annual Research Symposium: Bio-Nanotechnology and Biomedical Devices
23 Apr 2007 | | Contributor(s):: Rashid Bashir
BNC Annual Research Symposium: Nanophotonics
23 Apr 2007 | | Contributor(s):: Vladimir M. Shalaev