Berlin 2015 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 51: P16: New Instruments and Methods
CPP 51.1: Poster
Wednesday, March 18, 2015, 10:00–13:00, Poster A
Theoretical analysis of vibrating microstructures using dynamic scanning electron microscopy (DySEM) — •Maria Schröter1, Matthias Holschneider2, Martin Ritter3, Christiane Weimann1, and Heinz Sturm1,4 — 1BAM 6.9, Federal Inst. Materials Research, Berlin — 2Inst. Mathematics, Univ. Potsdam — 3Electron Microscopy, TU Hamburg-Harburg — 4Faculty V, TU Berlin
The poster presented shows the development and verification of a theory, with which the results of a newly developed measuring method (DySEM technique) can be described.
Dynamic Scanning Electron Microscopy is used for measuring the vibrational dynamics of a microscale oscillator at flexural and torsional resonance. In addition to the classical secondary electron (SE) signal, the dynamic part of the signal can be obtained using a lock-in amplifier synchronized to the excitation frequency.
The model of imaging generating mechanism relates the experimental images to the spatio-temporal interaction between electron beam and periodically vibrating microstructure. Furthermore, the material properties of the micro-oscillator as well as the contributions of energy loss mechanisms must be considered for imaging, especially for tapping mode microscopy of soft matter.
The analysis of the imaging of oscillating microstructures by means of scanning electron microscopy is thereby achieved in this poster presented as a combination of experiment, theory and simulation (1).
(1) Schröter, Dissertation TU Berlin (2014)