Advances in Ambient and Liquid AFM - Nanoscale Structure and Dynamics

By Roger Proksch

Asylum Research, an Oxford Instruments Company, Santa Barbara, CADr. Roger Proksch, CEO and co-founder, Asylum Research, Oxford Instruments Fellow 1989-1993: PhD Physics at University of Minnesota 1997-1999: Director of Magnetics Research at Digital Instr

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Abstract

In 1986, the Atomic Force Microscope was invented,[1] opening a window beyond the diffraction limit of optics onto the nanoscale world. From the beginning, researchers were captivated by the possibilities of “smallifying” existing laboratory techniques to the newly accessible nanometer length scale, perhaps most memorably captured by the phrase “lab on a tip”.[2]

In this talk, we will explore some recent results in observations of structure and dynamics in a variety of systems ranging from polymer dynamics in ambient conditions, 3D atomic resolution mapping of the structure of the solid-liquid interface, defect dynamics in crystal lattice and biologically relevant materials and molecules in fluid. In particular, dynamics can now be captured at frame rates ranging from >1,000 seconds/image to <100 milliseconds/image.

One of the most natural extensions beyond topography – given that the cantilever tip touches the sample surface – is stiffness and modulus measurements. While there are numerous techniques for quantifying elastic and inelastic properties with the AFM, we will focus on Bimodal AFM theory[3] and experiments[4] where more than one resonant vibrational mode of the cantilever is used. In particular, bimodal AFM has allowed very high-resolution and high-speed modulus measurements on a wide variety of samples ranging from soft gels and polymers to much stiffer metals and ceramics, ranging from less than 10 MPa to >100 GPa. Notably, these measurements can cover greater than three orders of magnitude in modulus with the same cantilever, both in ambient and fluid conditions. These measurements are in part enabled by photothermal actuation[5] and a new interferometric detection scheme[6] that allows calibration of the frequency-dependent cantilever sensitivity and stiffness.

Bio

Roger Proksch Dr. Roger Proksch, CEO and co-founder, Asylum Research, Oxford Instruments Fellow

1989-1993: PhD Physics at University of Minnesota
1997-1999: Director of Magnetics Research at Digital Instruments
1999-2012: Co-founder and President of Asylum Research, state-of-the-art SPM and AFM development & manufacturing
2012-Present: CEO of Asylum Research, an Oxford Instruments Company

  • Key contributor to the design and development of the MFP-1D, MFP-3D, Origin, Infinity, Cypher S and Cypher ES and Cypher VRS atomic force microscopes. Asylum systems have been recognized as the technology leading AFMs worldwide over the past 15 years.
  • Leading Asylum Research from its founding in 1999 with revenue of 0$, through an acquisition by Oxford Instrumentsand to the present.
  • Designed several novel application-specific options, accessories and experimental methods for the Asylum AFM product line, resulting in over seventy scientific publications and ten book chapters.
  • Inventor on 33 issued patents with more pending; portfolio includes innovative products and applications.
  • Collaborative efforts with customers which resulted in numerous awards including the Microscopy Today innovation Award, Roland B. Snow Award, Frost and Sullivan award, Technological Innovation Prize and multiple R&D 100 Awards.

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References

  1. Binnig, Quate, and Gerber, Physical review letters 56 930 (1960).
  2. Meyer, Ernst, Hans J. Hug, and Roland Bennewitz. Scanning probe microscopy: the lab on a tip. Springer Science & Business Media, 2013.
  3. T. T. Todriguez and R. Garcia, Appl. Phys. Lett. 84, 449 (2004).
  4. T. Proksch, Appl. Phys. Lett. 89, 113121 (2006).
  5. A. Labuda et al, Rev. Sci. Instrum. 83, 053702 (2012).
  6. A. Labuda and R. Proksch, Appl. Phys. Lett. 106 253103 (2015).

Cite this work

Researchers should cite this work as follows:

  • Roger Proksch (2017), "Advances in Ambient and Liquid AFM - Nanoscale Structure and Dynamics," http://nanohub.org/resources/27698.

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Location

1055 WALC, Purdue University, West Lafayette, IN

Advances in Ambient and Liquid AFM
  • Advances in Ambient and Liquid AFM 1. Advances in Ambient and Liquid… 0
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  • External Collaborators 2. External Collaborators 29.496162829496164
    00:00/00:00
  • Today… 3. Today… 81.51484818151485
    00:00/00:00
  • 1997 – Single molecule force measurements 4. 1997 – Single molecule force… 154.35435435435437
    00:00/00:00
  • Asylum Research History 5. Asylum Research History 281.18118118118122
    00:00/00:00
  • Bootstrapping 6. Bootstrapping 302.36903570236905
    00:00/00:00
  • Asylum Research: 2001 – 2012 7. Asylum Research: 2001 – 2012 361.12779446112779
    00:00/00:00
  • December 2012, AR became part of Oxford Instruments 8. December 2012, AR became part … 395.76242909576246
    00:00/00:00
  • Introduction to AFMs 9. Introduction to AFMs 442.64264264264267
    00:00/00:00
  • The challenge of making a product 10. The challenge of making a prod… 514.44778111444782
    00:00/00:00
  • Our new directions 11. Our new directions 614.24758091424758
    00:00/00:00
  • Metrological AFM 12. Metrological AFM 633.63363363363362
    00:00/00:00
  • Motivation 13. Motivation 677.610944277611
    00:00/00:00
  • Our new directions 14. Our new directions 827.293960627294
    00:00/00:00
  • AFM Nanomechanical Techniques 15. AFM Nanomechanical Techniques 831.59826493159835
    00:00/00:00
  • 20+ years ago… Here in Indiana… 16. 20+ years ago… Here in India… 874.44110777444109
    00:00/00:00
  • The first nanomechanical observable in tapping mode: Phase! 17. The first nanomechanical obser… 937.570904237571
    00:00/00:00
  • Inverting AC Mode – The Quest for a Tapping Mode Hooke's law… 18. Inverting AC Mode – The Ques… 997.36403069736411
    00:00/00:00
  • Bimodal/DualAC AFM - Two frequencies are better than one! 19. Bimodal/DualAC AFM - Two frequ… 1029.1624958291625
    00:00/00:00
  • Nanomechanical properties from AMFM (tapping) 20. Nanomechanical properties from… 1059.0590590590591
    00:00/00:00
  • Qualitative contrast: Multiphase materials 21. Qualitative contrast: Multipha… 1111.8451785118452
    00:00/00:00
  • Theory: Bimodal AFM 22. Theory: Bimodal AFM 1223.9906573239907
    00:00/00:00
  • Stiffest Materials : Setpoint Independent Modulus 23. Stiffest Materials : Setpoint … 1316.9502836169504
    00:00/00:00
  • Wide range of moduli with AM-FM 24. Wide range of moduli with AM-F… 1342.7427427427429
    00:00/00:00
  • Heating / Cooling of sPP-PS on Silicon 25. Heating / Cooling of sPP-PS on… 1384.3176509843177
    00:00/00:00
  • High spatial resolution of Polypropylene 26. High spatial resolution of Pol… 1438.0714047380714
    00:00/00:00
  • High spatial resolution Polyethylene 27. High spatial resolution Polyet… 1495.8291624958292
    00:00/00:00
  • Our new directions 28. Our new directions 1550.7507507507507
    00:00/00:00
  • A faster AFM requires a lot of faster components 29. A faster AFM requires a lot of… 1566.5999332666
    00:00/00:00
  • Cantilevers: 1986-1990 30. Cantilevers: 1986-1990 1680.1468134801469
    00:00/00:00
  • Commercial levers: 1990-2008 31. Commercial levers: 1990-2008 1743.7437437437438
    00:00/00:00
  • The new small is really small 32. The new small is really small 1777.5442108775442
    00:00/00:00
  • Why go small? Fluctuation-dissipation and a SHO 33. Why go small? Fluctuation-diss… 1806.272939606273
    00:00/00:00
  • 3 levers: Same k, different sizes 34. 3 levers: Same k, different si… 1991.1244577911245
    00:00/00:00
  • Smaller is quieter 35. Smaller is quieter 2001.1011011011012
    00:00/00:00
  • Lattice versus point resolution 36. Lattice versus point resolutio… 2016.8501835168502
    00:00/00:00
  • High Resolution on a Cypher, in Liquid 37. High Resolution on a Cypher, i… 2032.032032032032
    00:00/00:00
  • Commercial AFMs classified by speed 38. Commercial AFMs classified by … 2044.3443443443443
    00:00/00:00
  • Fast and High Resolution on Cypher VRS 39. Fast and High Resolution on Cy… 2074.3410076743412
    00:00/00:00
  • DNase Cleavage of Lambda Digest DNA 625 Hz with 320×64 pixels using an Olympus AC10 probe for a frame rate of 8.7 fps 40. DNase Cleavage of Lambda Diges… 2103.7037037037039
    00:00/00:00
  • Assembly of Collagen Fibrils 400 Hz with 512×256 pixels using an Olympus AC10 probe for a frame rate of 1.5 fps 41. Assembly of Collagen Fibrils 4… 2131.7984651317984
    00:00/00:00
  • Dynamics of CTAB Hemicylindrical Micelles 200 Hz with 256×128 pixels using an Olympus AC10 probe for a frame rate of 1.5 fps 42. Dynamics of CTAB Hemicylindric… 2174.2075408742076
    00:00/00:00
  • Video-Rate imaging of polymers in air Using ArrowUHF AuD probes 43. Video-Rate imaging of polymers… 2199.1658324991658
    00:00/00:00
  • Thanks! 44. Thanks! 2237.3373373373374
    00:00/00:00