Easy and direct method for calibrating atomic force microscopy lateral force measurements
نویسندگان
چکیده
منابع مشابه
Atomic Force Microscopy and Direct Surface Force Measurements
The atomic force microscope (AFM) is designed to provide high-resolution (in the ideal case, atomic) topographical analysis, applicable to both conducting and nonconducting surfaces. The basic imaging principle is very simple: a sample attached to a piezoelectric positioner is rastered beneath a sharp tip attached to a sensitive cantilever spring. Undulations in the surface lead to deflection o...
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We present here a method to calibrate the lateral force in the atomic force microscope. This method makes use of an accurately calibrated force sensor composed of a tipless piezoresistive cantilever and corresponding signal amplifying and processing electronics. Two ways of force loading with different loading points were compared by scanning the top and side edges of the piezoresistive cantile...
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Proper force calibration is a critical step in atomic and lateral force microscopies (AFM/LFM). The recently published torsional Sader method [C. P. Green et al., Rev. Sci. Instrum. 75, 1988 (2004)] facilitates the calculation of torsional spring constants of rectangular AFM cantilevers by eliminating the need to obtain information or make assumptions regarding the cantilever's material propert...
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9 Depths of colloid-surface interaction energy minima have been sometimes utilized for estimation of the force holding a colloid to the surface upon contact. Since this approach assumes that non-contact forces prevail following attachment, a comparison of this approach to direct measurement via atomic force microscopy is warranted. Interaction and adhesion forces between 1.0m diameter carboxyla...
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Liposomes serve as models for cells and show increasing applications in medical and nonmedical fields. Unilamellar vesicles are prepared from multilamellar vesicle (MLV) dispersions either by sonication or extrusion. The shape stability of liposomes is important in the understanding of membrane fusion, as well as in drug delivery and gene therapy. Therefore it has been the subject of numerous t...
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 2007
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.2745733