نتایج جستجو برای: afm technique

تعداد نتایج: 621308  

Journal: :The Review of scientific instruments 2007
Saltuk B Aksu Joseph A Turner

The atomic force microscope (AFM) can provide qualitative information by numerous imaging modes, but it can also provide quantitative information when calibrated cantilevers are used. In this article a new technique is demonstrated to calibrate AFM cantilevers using a reference piezolever. Experiments are performed on 13 different commercially available cantilevers. The stiff cantilevers, whose...

Journal: :Small 2015
Benjamin P Brown Loren Picco Mervyn J Miles Charl F J Faul

Using a conductive atomic force microscope (c-AFM) redox-writing technique, it is shown that it is possible to locally, and reversibly, pattern conducting, and nonconducting features on the surface of a low molecular weight aniline-based organic (semi)-conductor thin film using a commercial c-AFM. It is shown that application of a voltage between the tip and sample causes localized redox reacti...

Journal: :Advances in physiology education 2015
Filomena A Carvalho Teresa Freitas Nuno C Santos

Atomic force microscopy (AFM) is a useful and powerful tool to study molecular interactions applied to nanomedicine. The aim of the present study was to implement a hands-on atomic AFM course for graduated biosciences and medical students. The course comprises two distinct practical sessions, where students get in touch with the use of an atomic force microscope by performing AFM scanning image...

Journal: :Nanoscale 2012
Josep Font Sergio Santos Victor Barcons Neil H Thomson Albert Verdaguer Matteo Chiesa

In dynamic atomic force microscopy (AFM) the cantilever is vibrated and its dynamics are monitored to probe the sample with nanoscale and atomic resolution. Amplitude and frequency modulation atomic force microscopy (AM-AFM and FM-AFM) have established themselves as the most powerful methods in the field. Nevertheless, it is still debatable whether one or the other technique is preferred in a g...

2012
Eralci M. Therézio Maria L. Vega Roberto M. Faria Alexandre Marletta

Surface topology investigation of luminescent polymeric films is a promising research area due to the interest in their technological application, mainly to large-area electroluminescent displays (Holzera et al., 1999). Surface topology of organic flexible materials is generally controlled by a chemical and physical process, the polymer coatings are generally heterogeneous, and the most signifi...

2007

Ligand molecules for a particular receptor can be attached to the tip of an AFM probe, transforming the probe into a sensitive, chemically selective biosensor for that receptor [Riener et al. 2003]. Molecular recognition force microscopy (MRFM) is a single-molecule AFMbased technique that relies heavily on nanoscale surface chemistry, nanoscale biochemical immobilization chemistry, and bioconju...

2007
Travis Johnson

Ligand molecules for a particular receptor can be attached to the tip of an AFM probe, transforming the probe into a sensitive, chemically selective biosensor for that receptor [Riener et al. 2003]. Molecular recognition force microscopy (MRFM) is a single-molecule AFMbased technique that relies heavily on nanoscale surface chemistry, nanoscale biochemical immobilization chemistry, and bioconju...

2002
D. Nikezic K. N. Yu

Atomic force microscopy (AFM) has been employed to investigate characteristics of tracks of heavy charged particles in solid state nuclear track detectors (SSNTDs). In the present work, we have performed simulations of the track structures revealed by AFM based only on geometrical considerations of the tracks and two types of probes (the ultralever and the ultrahigh aspect ration probe). The pu...

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