SPMW Interplay between theory and experiment in AFM nanomechanical studies of polymers
30 Nov 2006 | Online Presentations | Contributor(s): Sergei Magonov, Sergey Belikov
High-resolution imaging of surfaces and compositional mapping of heterogeneous materials are the main functions of atomic force microscopy (AFM) in studies of polymer materials. Compositional mapping is mostly based on differences of mechanical properties of the sample components yet quantitative...
SPMW Nanomechanics: from nanotechnology to biology
12 Dec 2006 | Online Presentations | Contributor(s): Elisa Riedo
The development of new materials with size of few nanometers has opened a new field of scientific and technological research. The goal is to develop faster and better communication systems and transports, as well as smarter and smaller nanodevices for biomedical applications. To reach these...
SPMW Mechanisms of atomic friction studied by friction force microscopy
12 Dec 2006 | Online Presentations | Contributor(s): Ernst Meyer
Force microscopy is a versatile instrument to investigate physical phenomena on surfaces. The first emphasis is on the study of friction on the nanometer-scale, also called nanotribology. It will be shown that atomic-scale stick-slip is relatively well understood, where the dependence on velocity...
SPMW Nanotube, nanoneedle and nanomeniscus: mechanical and wetting properties of modified AFM tip apex
12 Dec 2006 | Online Presentations | Contributor(s): J. P. AimÃƒÂ©
Among AFM microscopes, Dynamic force microscopes (DFM) are very sensitive to variation of minute forces involved in the interaction between the tip and the surface. However, despite numerous efforts, imaging and probing mechanical properties of soft materials in air and water at the nm scale are...
SPMW The Nanomechanics of compositional mapping in amplitude modulation AFM
05 Jan 2007 | Online Presentations | 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...
SPMW Single molecule recognition atomic force microscopy
05 Jan 2007 | Online Presentations | Contributor(s): Peter Hinterdorfer
In molecular recognition force microscopy (MRFM), ligands are covalently attached to atomic force microscopy tips for the molecular recognition of their cognitive receptors on probe surfaces. A ligand-containing tip is approached towards the receptors on the probe surface, which possibly leads to...
SPMW Scanning Impedance Microscopy: probing local electronic structure and transport anomalies
05 Jan 2007 | Online Presentations | Contributor(s): dawn bonnell
Multiple modulation SPM is a general term for a strategy that extracts information about a surface or nanostructure by combining various signals on samples and tips, using multiple frequencies to distinguish them and accessing multiple harmonics in detection. In addition to the usual conductance,...
SPMW A fresh look to amplitude-modulation AFM: Force minimization, interaction measurement, and the quest for high resolution
05 Jan 2007 | Online Presentations | 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...
SPMW Scanning Probe Acceleration Microscopy: Towards Real Time Reconstruction of Tip-Sample Forces in Tapping Mode AFM
05 Jan 2007 | Online Presentations | Contributor(s): Tomasz Kowalewski
Tapping mode atomic force microscopy (TMAFM) in fluids has become an increasingly important technique, especially in studying biological samples under near physiological conditions. However, until recently the physics of tapping mode operation under fluids has not been well understood. The first...
SPMW FIRAT: A fast and sensitive probe structure for SPM
05 Jan 2007 | Online Presentations | Contributor(s): F. Levent Degertekin
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...
SPMW Nonlinear dynamics in AFM - chaos and parametric resonance
05 Jan 2007 | Online Presentations | Contributor(s): Arvind Raman
The field of nonlinear dynamics deals with mathematical techniques to study the nonlinear equations that serve as models of physical systems. The benefits of using nonlinear dynamics concepts to interpret and predict probe oscillations in dynamic AFM  are becoming increasingly clear. Nonlinear...
SPMW AFM at Video Rate and Beyond
16 May 2007 | Online Presentations | 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 detrimental...