Nanoscale spatial mapping of mechanical properties through dynamic atomic force microscopy

• Zahra Abooalizadeh,
• Leszek Josef Sudak and
• Philip Egberts

Beilstein J. Nanotechnol. 2019, 10, 1332–1347, doi:10.3762/bjnano.10.132

• modulus of highly oriented pyrolytic graphite (HOPG), specifically by using force modulation microscopy (FMM) and contact resonance (CR) AFM. In both of these techniques, a variation in the amplitude signal was observed when scanning over an uncovered step edge of HOPG. In comparison, no variation in the

• (CR) AFM; elastic modulus mapping; force modulation microscopy (FMM); highly oriented pyrolytic graphite (HOPG); mechanical properties; surface science; surface steps; Introduction In recent years, the study of the size-dependent properties of materials, and in particular those at the nanometer scale

• . Realizing these qualitative measurements, FMM was conducted to quantify the changes in the elastic modulus over uncovered steps. Results of force modulation microscopy (FMM) experiments Figure 6a shows a topographic map of a third area of the HOPG surface containing both uncovered and covered steps acquired

Mapping mechanical properties of organic thin films by force-modulation microscopy in aqueous media

• Jianming Zhang,
• Zehra Parlak,
• Carleen M. Bowers,
• Terrence Oas and
• Stefan Zauscher

Beilstein J. Nanotechnol. 2012, 3, 464–474, doi:10.3762/bjnano.3.53

• important role in a broad range of applications. Although force-modulation microscopy (FMM) is used to map the apparent elastic properties of such films with high lateral resolution in air, it has rarely been applied in aqueous media. In this letter we describe the use of FMM to map the apparent elastic

• our knowledge, only a few studies report the use of acoustic AFM on molecularly thin films or soft materials in liquid [7][36]. Here we show that force-modulation microscopy (FMM) is a powerful acoustic AFM method for mapping surface mechanical properties in fluids. In a typical FMM setup, the tip

• properties. Conclusion We showed that force-modulation microscopy (FMM) can be used to image organic thin films in aqueous environments with high spatial resolution and sensitivity to conformational details that affect the contact mechanics. FMM generated high-contrast amplitude and phase images of proteins