AFM Modes

PeakForce Tapping

定量,最高分辨率现象g and property mapping

PeakForce Tapping — How AFM Should Be, 10 Years and Counting

Bruker的独家PeakforceTappe®是原子力显微镜(AFM)技术的最重要科学突破以来TappingMode.™. It provides unprecedented high-resolution imaging, extends AFM measurements into a range of samples not previously accessed and uniquely enables simultaneous nanoscale property mapping.

Highest Resolution Imaging

PeakForce Tapping enables the researcher to precisely control probe-to-sample interaction enabling the lowest available imaging forces. This superior force control results in the most consistent, highest resolution AFM imaging for the widest range of sample types, from the softest biological samples to very hard materials.

Unique, Quantitative Results, Whatever You Measure

PeakForce Tapping’s piconewton (pN) force sensitivity simultaneously and uniquely combines the highest resolution AFM imaging with quantitative, nanoscale electrical, mechanical, biological, and chemical property mapping, enabling researchers of all experience levels to make new discoveries.

Easy to Use, Making Every User an AFM Expert

PeakForce Tapping’s direct and linear force control provides the user with unmatched AFM ease of use with ScanAsyst® image optimization software, and the low forces preserve the probe shape for longer life and more consistent imaging.

How It Works

In PeakForce Tapping, the probe periodically taps the sample and the pN-level interaction force is measured directly by the deflection of the cantilever. A real feedback loop (not force trigger) keeps the peak force down to 10 pN at actuation rates up to 8 kHz, in air and fluid.

Peakforce Tapping由于其前所未有的低成像力和易用性,对于必威手机客户端材料研究和生物样品的理想选择。无需悬臂调整。优异的力控制保持尖端和样品完整性,导致甚至是最小结构的始终如一的准确和高分辨率测量,从原子缺陷到双螺旋DNA。

PeakForce Tapping Enabled AFM Modes

Three examples of data only available with PeakForce Tapping: (A) correlated electrical and mechanical mapping reveals inactive metal oxide grains in battery cathode; (B) measuring conductivity of individual P3HT nanowires not amenable to contact mode; and (C) nanoscale strain distribution in graphene on boron nitride. Image (C) courtesy of C. Woods, University of Manchester.

The greatest power of PeakForce Tapping technology comes from its ability to simultaneously enable and enhance other correlative and quantitative mapping techniques, delivering new possibilities in an ever-expanding set of topographical, mechanical, biological, electrical and chemical applications at the nanoscale:

Greatest Adoption Rate of Any AFM Mode

The adoption rate of PeakForce Tapping has surpassed even that of TappingMode, with over 4,000 publications in the ten years since its release. This includes over 2000 publications using PeakForce QNM and more than 400 using PeakForce electrical modes. That is more than one PeakForce Tapping article every day, for 10 years!

PeakForce Tapping submolecular-resolution adhesion on iPMMA. 100 nm image. (Sample courtesy of T. Thurn-Albrecht, Martin-Luther-Universitaet Halle-Wittenberg.)

PeakForce Tapping provided my lab with the force control and resolution necessary to produce ground-breaking ligand-receptor interaction maps using functionalized probes on live cells in a very time efficient and controlled way.

Dr. Daniel Müller, ETH Zürich, Switzerland