Vibration analysis and pull-in instability behavior in a multiwalled piezoelectric nanosensor with fluid flow conveyance

• Sayyid H. Hashemi Kachapi

Beilstein J. Nanotechnol. 2020, 11, 1072–1081, doi:10.3762/bjnano.11.92

• constants, residual stress, piezoelectric constants and mass density, are considered for analysis of the dimensionless natural frequency with respect to the viscous fluid velocity and pull-in voltage of the FC-MWPENSs. Keywords: electrostatic excitation; piezoelectric nanosensor; pull-in voltage; stability

Implementation of data-cube pump–probe KPFM on organic solar cells

• Benjamin Grévin,
• Olivier Bardagot and
• Renaud Demadrille

Beilstein J. Nanotechnol. 2020, 11, 323–337, doi:10.3762/bjnano.11.24

• = −CPD [39]. The KPFM data are presented as Vdc images also referred to as KPFM potential or SP images for simplicity. A lock-in amplifier (Signal Recovery 7280) was used to measure simultaneously the modulation of the frequency shift at the electrostatic excitation frequency. The ‘in-phase’ amplitude of

Electrostatically actuated encased cantilevers

• Benoit X. E. Desbiolles,
• Gabriela Furlan,
• Adam M. Schwartzberg,
• Paul D. Ashby and
• Dominik Ziegler

Beilstein J. Nanotechnol. 2018, 9, 1381–1389, doi:10.3762/bjnano.9.130

• , or vacuum environments. Keywords: amplitude calibration; atomic force microscopy; electrostatic excitation; encased cantilevers; liquid AFM; Introduction Dynamic atomic force microscopy requires excitation of the cantilever oscillation. Most commonly, this is achieved using a dither piezo built

• metallic spring clip of the holder, we can provide reliable electrical contacts to the cantilever (Utip) and excitation electrode on the encasement (Udrive). Results Experimental results Electrostatic vs piezoacoustic excitation Figure 2 compares piezoacoustic and electrostatic excitation in air. In both

• , electrostatic excitation (Figure 2b) results in a clean Lorentzian resonance peak with a smooth 180° phase transition. The resonance matches the thermal peak shown in Figure 2c. By fitting a harmonic oscillator model to the thermal peak (fit shown in green), we find a resonance frequency of f0 = 347.530 kHz

Efficiency improvement in the cantilever photothermal excitation method using a photothermal conversion layer

• Natsumi Inada,
• Hitoshi Asakawa,
• Taiki Kobayashi and
• Takeshi Fukuma

Beilstein J. Nanotechnol. 2016, 7, 409–417, doi:10.3762/bjnano.7.36

• measurements [13][14]. To solve these problems, alternative methods have been developed such as photothermal excitation [15][16][17], magnetic excitation [18][19] and electrostatic excitation [20]. In the photothermal excitation method, a power-modulated laser beam irradiates the fixed end of a cantilever. The

Influence of spurious resonances on the interaction force in dynamic AFM

• Luca Costa and
• Mario S. Rodrigues

Beilstein J. Nanotechnol. 2015, 6, 420–427, doi:10.3762/bjnano.6.42

• interface measured with a conventional piezoelectric dither excitation and direct electrostatic excitation. The different setups provide the same evaluation of the force gradient although the calibration parameters are different. Finally, we have highlighted the changes that have to be introduced into the

• and to apply an electrostatic excitation to the conductive cantilever at a frequency close to resonance. Excitation of the tip in air and in liquid with different actuation methods: a) electrostatic excitation of the cantilever in air (black) and in liquid (blue); b) Amplitude of the tip directly

• excited (blue) and mechanically excited (red) in liquid; (c and d) normalized excitation and phase, respectively; e) force gradient and f) dissipation measured at the mica/deionized water interface with electrostatic excitation of the tip (blue) and conventional piezoelectric excitation (red). Equation 14