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Home > Press > Measure Both Elastic and Viscous Properties with AFM Using Asylum Research’s Exclusive AM-FM Viscoelastic Mapping Mode

AM-FM Mode images for a polystyrene-polycaprolactone (PS-PCL) polymer film on mica: elastic storage modulus (a and c), viscoelastic loss tangent (b), and indentation depth (d). Scan sizes 5 μm (a and b) and 1.5 μm (c and d). Storage modulus is higher in PS regions (light brown) than PCL regions (dark brown), while PCL regions exhibit higher loss tangent than PS. Images acquired on a Cypher S with bluedrive photothermal excitation.
AM-FM Mode images for a polystyrene-polycaprolactone (PS-PCL) polymer film on mica: elastic storage modulus (a and c), viscoelastic loss tangent (b), and indentation depth (d). Scan sizes 5 μm (a and b) and 1.5 μm (c and d). Storage modulus is higher in PS regions (light brown) than PCL regions (dark brown), while PCL regions exhibit higher loss tangent than PS. Images acquired on a Cypher S with bluedrive photothermal excitation.

Abstract:
Oxford Instruments Asylum Research announces the availability of its powerful new nanomechanical imaging technique, AM-FM Viscoelastic Mapping Mode, for its entire line of Cypher™ and MFP-3D™ atomic force microscopes (AFMs). AM-FM Viscoelastic Mapping Mode lets you quickly and gently image viscoelastic properties including storage modulus and loss tangent with nanoscale spatial resolution. The imaging mode is ideal for quantitative nanomechanical measurements on materials such as polymers, composites, biomaterials, ceramics, and metals.

Measure Both Elastic and Viscous Properties with AFM Using Asylum Research’s Exclusive AM-FM Viscoelastic Mapping Mode

Santa Barbara, CA | Posted on August 28th, 2014

"AM-FM Viscoelastic Mapping Mode is arguably the most powerful nanomechanical technique in Asylum's NanomechProTM Toolkit because it can measure both the elastic storage modulus and the viscous loss modulus or loss tangent over an extremely wide range of materials," said Roger Proksch, President of Oxford Instruments Asylum Research. "AM-FM combines the features and benefits of normal tapping mode (AM) with quantitative, high sensitivity Frequency Modulation mode (FM). Because it's based on normal tapping mode, it is simple and stable to operate, gentle enough for the softest samples and provides amazing high resolution images. It is also compatible with small cantilevers for fast scanning and reduced noise."

AM-FM Mode gets results by operating at two cantilever resonances simultaneously. The first resonance is used for tapping mode imaging, also known as amplitude modulation (AM), while a higher resonance mode is operated in frequency modulation (FM). At resonance, the cantilever frequency and phase respond sensitively to changes in sample properties (i.e. stiffness, adhesion, loss tangent, etc.).

Small frequency and phase shifts can be measured with very high precision and accuracy, reducing uncertainty and increasing sensitivity. AM-FM offers quick visualization of relative contrast of sample components, and provides quantitative estimates of mechanical properties with Asylum's built-in or customizable mechanical models. Its very wide operating range, from less than 1 MPa to hundreds of GPa, makes it a highly versatile and high resolution technique.

AM-FM Viscoelastic Mapping is just one of the many techniques that are available in Asylum's NanomechProTM toolkit. Additional information on AM-FM Viscoelastic Mapping can be found at www.AsylumResearch.com/AMFM. To receive a quotation, email us at

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About Oxford Instruments Asylum Research, Inc.
Oxford Instruments Asylum Research is the technology leader in atomic force microscopy for both materials and bioscience research. Asylum Research AFMs are used for a wide variety of nanoscience applications in material science, physics, polymers, chemistry, tribology, biomaterials, and bioscience, including emerging applications in energy storage and generation, low-dimensional materials, and biophysics.

Asylum’s MFP-3D family of AFMs includes four different models that span a wide range of performance, applications, and budgets. The new MFP-3D Infinity is the flagship of the family, offering the highest performance, simplest operation, and widest range of capabilities. The MFP-3D Classic, the original MFP- 3D offered for mid-range budgets, provides high performance and versatility that exceeds most AFMs. The MFP-3D Origin is the most affordable model, offering the same performance as the MFP-3D Classic with many accessories and an easy upgrade path to advanced capabilities. Finally, the MFP-3D-BIO integrates with an inverted light microscope to support biological and photonic applications.

Cypher is the highest resolution fast scanning AFM and is available in two configurations, the Cypher S and the Cypher ES Environmental AFM. They provide low-drift closed loop imaging for the most accurate images and measurements possible today, >20X faster imaging with small cantilevers, exceptional ease of use, and integrated thermal, acoustic and vibration control – all in a small footprint. Cypher AFMs routinely achieve higher resolution than other AFMs, as demonstrated by single point atomic defects in crystal lattices and imaging of the DNA double helix.

The Cypher ES adds gas and liquid environmental control, temperature control, and enhanced chemical compatibility to the extraordinary performance of the Cypher S.

In addition to the best AFMs, Asylum Research also offers unmatched customer support that is free for the lifetime of the AFM and industry-leading warranties for the lowest cost of ownership of any AFM. Asylum has sales, applications and service staff in offices in the United States, Germany, United Kingdom, Japan, France, China and Taiwan and global distribution.

About Oxford Instruments plc

Oxford Instruments designs, supplies and supports high-technology tools and systems with a focus on research and industrial applications. Innovation has been the driving force behind Oxford Instruments' growth and success for over 50 years, and its strategy is to effect the successful commercialisation of these ideas by bringing them to market in a timely and customer-focused fashion.

The first technology business to be spun out from Oxford University, Oxford Instruments is now a global company with over 2300 staff worldwide and is listed on the FTSE250 index of the London Stock Exchange (OXIG). Its objective is to be the leading provider of new generation tools and systems for the research and industrial sectors with a focus on nanotechnology. Its key market sectors include nano- fabrication and nano-materials. The company’s strategy is to expand the business into the life sciences arena, where nanotechnology and biotechnology intersect.

This involves the combination of core technologies in areas such as low temperature, high magnetic field and ultra high vacuum environments; Nuclear Magnetic Resonance; x-ray, electron, laser and optical based metrology; atomic force microscopy; optical imaging; advanced growth, deposition and etching.
Oxford Instruments aims to pursue responsible development and deeper understanding of our world through science and technology. Its products, expertise, and ideas address global issues such as energy, environment, security and health.

For more information, please click here

Contacts:
Terry Mehr, Manager, Marketing Communications , 805-696-6466

Copyright © Oxford Instruments Asylum Research, Inc.

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