Bulk chemical composition contrast from attractive forces in AFM force spectroscopy

• Dorothee Silbernagl,
• Media Ghasem Zadeh Khorasani,
• Natalia Cano Murillo,
• Anna Maria Elert and
• Heinz Sturm

Beilstein J. Nanotechnol. 2021, 12, 58–71, doi:10.3762/bjnano.12.5

• determined. Keywords: AFM force spectroscopy; composites; principle component analysis; structure–property correlation; van der Waals forces; Introduction The mechanical properties of small volumes of materials can be measured using various atomic force microscopy (AFM) methods. The well-established force

• is valid for the measurements that were performed with a single AFM probe. Under this condition, any given FDC can be classified in the kr/Fattr diagram. This treatment can, therefore, be considered a manually performed principle component analysis (mPCA). Figure 3 shows the analogue results for bulk

• component, allowing for a manual principle component analysis. Retransferring the results of the mPCA into the spatial domain allows for a chemical mapping of the sample that is independent from the parameters describing the mechanical behavior. This was shown for two different force spectroscopy methods