Quantitative Mechanical Property Mapping with PeakForce QNM
نویسندگان
چکیده
The unambiguous and quantitative modulus and adhesion data provided by PeakForce QNM® can help to answer the critical question of what materials are abundant on a topographic area and how they are distributed. QNM makes possible to study the variation and position of mechanical properties across a surface at speed and resolutions not attainable by other methods. This imaging technology is a special mode of atomic force microscopy (AFM); nondestructive to both tip and sample since it directly controls the peak normal force and minimizes the lateral force on the probe. Maps of mechanical properties such as Young’s modulus, adhesion and deformation are calculated and directly superposed on topographical structure. Since force distance data is analyzed directly, there is no ambiguity regarding the source of image contrast, as often occurs in other techniques. Mechanical property maps are quantitative, low noise, and can span a very wide range of property values. The capabilities of PeakForce QNM provide R&D departments with critical material property information to enable better understanding of their samples at the nanoscale.
منابع مشابه
Atomic force microscopy of red-light photoreceptors using peakforce quantitative nanomechanical property mapping.
Atomic force microscopy (AFM) uses a pyramidal tip attached to a cantilever to probe the force response of a surface. The deflections of the tip can be measured to ~10 pN by a laser and sectored detector, which can be converted to image topography. Amplitude modulation or "tapping mode" AFM involves the probe making intermittent contact with the surface while oscillating at its resonant frequen...
متن کاملNanomechanical properties of α-synuclein amyloid fibrils: a comparative study by nanoindentation, harmonic force microscopy, and Peakforce QNM
We report on the use of three different atomic force spectroscopy modalities to determine the nanomechanical properties of amyloid fibrils of the human α-synuclein protein. α-Synuclein forms fibrillar nanostructures of approximately 10 nm diameter and lengths ranging from 100 nm to several microns, which have been associated with Parkinson's disease. Atomic force microscopy (AFM) has been used ...
متن کاملSimultaneous Electrical and Mechanical Property Mapping at the Nanoscale with PeakForce TUNA
through PeakForce QNMTM, 3) correlated nanoscale AFM-based conductivity measurements are a powerful technique for nanometer-scale electrical characterization on a wide range of samples. Traditionally, these measurements have been categorized into two classes: Conductive AFM (CAFM), which covers the higher current range (sub-nA up to μA), and Tunneling AFM (TUNA), which covers the lower current ...
متن کاملNanoscale mapping of dielectric properties based on surface adhesion force measurements
The detection of local dielectric properties is of great importance in a wide variety of scientific studies and applications. Here, we report a novel method for the characterization of local dielectric distributions based on surface adhesion mapping by atomic force microscopy (AFM). The two-dimensional (2D) materials graphene oxide (GO), and partially reduced graphene oxide (RGO), which have si...
متن کاملAtomic force microscopy as an advanced tool in neuroscience
This review highlights relevant issues about applications and improvements of atomic force microscopy (AFM) toward a better understanding of neurodegenerative changes at the molecular level with the hope of contributing to the development of effective therapeutic strategies for neurodegenerative illnesses. The basic principles of AFM are briefly discussed in terms of evaluation of experimental ...
متن کامل