Zentraleinrichtung Elektronenmikroskopie (ZELMI)

3 Items

Recent Submissions
Measurement of Flexural Rigidity of Multi-Walled Carbon Nanotubes by Dynamic Scanning Electron Microscopy

Fortini, Renata ; Meyer-Plath, Asmus ; Kehren, Dominic ; Gernert, Ulrich ; Jácome, Leonardo Agudo ; Sturm, Heinz (2020-05-12)

In this work the flexural rigidity of individual large diameter multi-walled carbon nanotubes (MWCNTs) was investigated. The bending modulus were obtained by detecting the resonance frequencies of mechanically excited cantilevered carbon nanotubes using the so-called dynamic scanning electron microscopy technique, and applying the Euler–Bernoulli beam theory. For the nanotubes studied, we deter...

Nanoscale Imaging of High‐Field Magnetic Hysteresis in Meteoritic Metal Using X‐Ray Holography

Blukis, R. ; Pfau, B. ; Günther, Christian ; Hessing, P. ; Eisebitt, Stefan ; Einsle, J. ; Harrison, R. J. (2020-08-03)

Stable paleomagnetic information in meteoritic metal is carried by the “cloudy zone”: ~1–10 μm‐wide regions containing islands of ferromagnetic tetrataenite embedded in a paramagnetic antitaenite matrix. Due to their small size and high coercivity (theoretically up to ~2.2 T), the tetrataenite islands carry very stable magnetic remanence. However, these characteristics also make it difficult to...

Determination of the effective detector area of an energy-dispersive X-ray spectrometer at the scanning electron microscope using experimental and theoretical X-ray emission yields

Procop, Mathias ; Hodoroaba, Vasile-Dan ; Terborg, Ralf ; Berger, Dirk (2016)

A method is proposed to determine the effective detector area for energy-dispersive X-ray spectrometers (EDS). Nowadays, detectors are available for a wide range of nominal areas ranging from 10 up to 150 mm2. However, it remains in most cases unknown whether this nominal area coincides with the “net active sensor area” that should be given according to the related standard ISO 15632, or with a...