Nanoscale Indentation of Polymer Systems Using the Atomic Force Microscope

VanLandingham, Mark R.; McKnight, Steven H.; Palmese, Giuseppe R.; Elings, J. R.; Huang, Xiaoqin; Bogetti, Travis A.; Eduljee, R. F.; Gillespie, John W.

doi:10.1080/00218469708010531

Cited by 152 publications

(89 citation statements)

References 31 publications

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“…In practice, the surface is rarely flat, and the tip apex may differ from an ideal sphere, leading to errors in the calculated modulus values. An additional complication is rotation (the lateral and buckling movement) of the AFM tip during cantilever deflection which produces tip-surface shear forces that are not accounted for in these models [11].…”

Section: Introductionmentioning

confidence: 99%

The use of the PeakForce^TMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers

Young

Monclús

Burnett

et al. 2011

Meas. Sci. Technol.

301

202

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SUMMARYPeakForce TM Quantitative Nanomechanical Mapping (QNM TM ) is a new atomic force microscopy technique for measuring the Young's modulus of materials with high spatial resolution and surface sensitivity, by probing at the nanoscale. In the present work, modulus results from PeakForce™ QNM™ using three different probes are presented for a number of different polymers with a range of Young's moduli that were measured independently by Instrumented (nano) Indentation Testing (IIT). The results from the diamond and silicon AFM probes were consistent and in reasonable agreement with IIT values for the majority of samples. It is concluded that the technique is complimentary to IIT; calibration requirements and potential improvements to the technique are discussed.

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Section: Introductionmentioning

confidence: 99%

The use of the PeakForce^TMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers

Young

Monclús

Burnett

et al. 2011

Meas. Sci. Technol.

301

202

View full text Add to dashboard Cite

show abstract

“…Quantitative analyses of AFM data are complicated by problems relating to tip deformation and geometry, piezo hysteresis and creep, as well as an off-normal tip approach. [8][9][10] More recently, numerous AFM imaging techniques employing modulation have been developed. In these techniques, the changes in amplitude or phase response of an oscillating tip or sample as the tip is scanned over a heterogeneous sample can be used to map materials property variations.…”

Section: Introductionmentioning

confidence: 99%

Quantitative imaging of nanoscale mechanical properties using hybrid nanoindentation and force modulation

Asif

Wahl

Colton

et al. 2001

Journal of Applied Physics

237

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In this article, we present a quantitative stiffness imaging technique and demonstrate its use to directly map the dynamic mechanical properties of materials with nanometer-scale lateral resolution. For the experiments, we use a ''hybrid'' nanoindenter, coupling depth-sensing nanoindentation with scanning probe imaging capabilities. Force modulation electronics have been added, enhancing instrument sensitivity and enabling measurements of time dependent materials properties ͑e.g., loss modulus and damping coefficient͒ not readily obtained with quasi-static indentation techniques. Tip-sample interaction stiffness images are acquired by superimposing a sinusoidal force ͑ϳ1 N͒ onto the quasi-static imaging force ͑1.5-2 N͒, and recording the displacement amplitude and phase as the surface is scanned. Combining a dynamic model of the indenter ͑having known mass, damping coefficient, spring stiffness, resonance frequency, and modulation frequency͒ with the response of the tip-surface interaction, creates maps of complex stiffness. We demonstrate the use of this approach to obtain quantitative storage and loss stiffness images of a fiber-epoxy composite, as well as directly determine the loss and storage moduli from the images using Hertzian contact mechanics. Moduli differences as small as 20% were resolved in the images at loads two orders of magnitude lower than with indentation, and were consistent with measurements made using conventional quasi-static depth-sensing indentation techniques.

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“…Data point 2 reflects the second set of load curves of the sequence, made on the same Au/Cr/Si sample with 5 *1O MPa stress applied. The solid line represents the entire sequence of measurements (1)(2)(3)(4)(5)(6)(7)(8) performed on this sample. The elastic response measured with the sample unstressed, mounted on the sample stage, is shown by points 1,5 and 8.…”

Section: Resultsmentioning

confidence: 99%

“…By carefilly controlling the experiment, the relationship between load and deformation closely follows the classical Hertzian model for a rigid, non-interacting parabolic punch deforming an elastic half space, and is given by: F = E* (R1/2) d3/2 (2) where E* the measured modulus is given by: I/E*= ( l-vJ/Ei + 1-vJES and Ei = elastic modulus of indenter= 1100 GPa Es= elastic modulus of the sample d = indentation depth R = indenter radius Equation 2 relates the initial loading response of a surface to its elastic modulus. The indentation depth, d, is controlled using the z-piezo of the IFM, and the radius of the indenter, R, is determined from the SEM or probe characterize images.…”

Section: The Analysismentioning

confidence: 99%

The Correlation of Stress-State and Nano-Mechanical Properties in Au

et al. 1998

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A high-speed data link that would provide dramatically faster communication ffom downhole instruments to the surface and back again has the potential to revolutionize deep drilling for geothermal resources through Diagnostics-While-Drilling (DWD).Many aspects of the drilling process would significantly improve if downhole and surface data were acquired and processed in real-time at the surface, and used to guide the drilling operation. Such a closed-loop, driller-in#e-loop DWD system, would complete the loop between information and control, and greatly improve the performance of drilling systems.The main focus of tlis program is to demonstrate the value of real-time data for improving drilling. While high-rate transfer of down-hole data to the surface has been accomplished before, insufficient emphasis has been placed on utilization of the data to tune the drilling process to demonstrate the true merit of the concept. Consequently, there has been a lack of incentive on the part of industry to develop a simple, lowcost, effective high-speed data link.Demonstration of the benefits of DWD based on a high-speed data link will convince the drilling industry and stimulate the flow of private resources into the development of an economical high-speed data link for geothermal drilling applications. Such a downhole communication system would then make possible the development of surface data acquisition and expert systems that would greatly enhance drilling operations. Further, it would foster the development of downhole equipment that could be controlled from the surface to improve hole traj ectory and drilling performance.

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Nanoscale Indentation of Polymer Systems Using the Atomic Force Microscope

Cited by 152 publications

References 31 publications

The use of the PeakForce^TMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers

The use of the PeakForce^TMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers

Quantitative imaging of nanoscale mechanical properties using hybrid nanoindentation and force modulation

The Correlation of Stress-State and Nano-Mechanical Properties in Au

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Nanoscale Indentation of Polymer Systems Using the Atomic Force Microscope

Cited by 152 publications

References 31 publications

The use of the PeakForceTMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers

The use of the PeakForceTMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers

Quantitative imaging of nanoscale mechanical properties using hybrid nanoindentation and force modulation

The Correlation of Stress-State and Nano-Mechanical Properties in Au

Contact Info

Product

Resources

About

The use of the PeakForce^TMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers

The use of the PeakForce^TMquantitative nanomechanical mapping AFM-based method for high-resolution Young's modulus measurement of polymers