Atomic Force Microscopy Webinars

Quantitative AFM Nanomechanics Data for Machine Learning and Materials Development

Explore new modes for AFM-based, machine learning (ML) augmented research on advanced materials with specific functions and desired properties

Watch On Demand

In this webinar, Quantitative AFM Nanomechanics Data for Machine Learning and Materials Developments, we highlight how AFM-based nanomechanical measurements and machine learning can provide new insights into the mechanical properties of polymeric materials.

Watch the webinar recording to:

  • find out how to use AFM data to apply machine learning to materials development;
  • learn about the strengths and weaknesses of different popular AFM Modes used in automated polymer research and development; and
  • get actionable insights for analyzing materials with complex architectures or properties using machine learning algorithms and AFM data.

Key Topics

For material development, it is of interest to understand the relationship between the sample microstructure and its properties at the macroscale. Machine learning can be applied to this problem in several different ways to characterize the microstructure and identify components as well as predict structure-property relationships. Regardless of the application, a large amount of data is generally required to allow the ML model to be developed.

Atomic force microscopy can provide this data, provided an appropriate mode of operation is chosen.

The first part of this webinar is dedicated to the following goals:

  1. Show how AFM is ideally suited for providing the data needed to apply machine learning (ML) to materials development because of its ability to provide quantitative maps of mechanical properties at the nanoscale.
  2. Introduce several AFM modes that are often used in polymer research and describe their strengths and weaknesses.
  3. Discuss methods to automate and maximize the speed of acquisition, optimize property map accuracy, and take advantage of novel property channels and data cubes.

In the second part, we discuss computational methods and ML algorithms dealing with data clustering (such as K-Means or Automatic Gaussian Mixture Model) that can be used to detect the different domains and (inter)phases in materials (e.g. polymer blends, hydrogels, nanocomposites, block copolymers, …) by partitioning the recorded data (i.e. the observables) into clusters according to their similarities. Additionally, based on the Tabor coefficient calculation, we also propose some protocols that can be easily implemented to rapidly determine which mechanical model(s) can be applied to obtain the quantitative mapping of the mechanical properties for each local domain or phase.

This algorithmically driven approach enables AFM users to analyze materials with more complex architectures and/or other properties (such as electrical ones), opening new avenues of research on advanced materials with specific functions and desired properties leading to the creation of functional and more reliable structural materials.

 

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This webinar was presented on March 16, 2021

Speakers

Bede Pittenger, Ph.D.

Bruker Nano Surfaces Sr. Staff Scientist, AFM Applications

 

Dr. Bede Pittenger is a Senior Staff Development Scientist in the AFM Unit of Bruker's Nano Surfaces Business.  He received his PhD in Physics from the University of Washington (Seattle, WA) in 2000, but has worked with scanning probe microscopes for 25 years, building systems, developing techniques, and studying properties of materials at the nanoscale.  His work includes more than thirty publications and three patents on various techniques and applications of scanning probe microscopy.  Dr. Pittenger's interests span topics from interfacial melting of ice, to mechanobiology of cells and tissues, to the nanomechanics of polymers and composites.

Prof. Dr. Philippe LECLERE

Associate Professor, University of Mons

Philippe Leclère, Ph.D. is a Research Director of the Belgian National Fund for Scientific Research (FRS – FNRS) and associate professor at UMONS. His research interests include characterization of the morphology, electrical and mechanical properties of polymeric systems such as blends, nanocomposites, block copolymers, liquid crystals, and supramolecular (nano)structures. These systems find applications in organic electronics and energy harvesting devices (field effect transistors, organic light emitting diodes, (hybrid) photovoltaic solar cells, batteries, nanogenerators and (bio)sensors), in smart coatings as well as biomimetic polymer-based materials. In addition, Philippe has been active in development and validation of novel SPM techniques and methodologies to quantitatively determine mechanical, thermal, electrical and the “coupled” properties (such as piezoelectricity, flexoelectricity and thermoelectricity) of polymeric and hybrid materials at the nanoscale. He is author of about 200 papers (h-index of 42) in the field and gave more than 300 talks around the world. He is currently the President of NanoWal (the Wallonia Network for Nanotechnologies) and Vice-President of the Royal Belgian Society for Microscopy.