Surface resonance modes in magnetic nanoparticles: Size scaling of the frequency versus surface anisotropy

2003 ◽  
Vol 196 (1) ◽  
pp. 13-15 ◽  
Author(s):  
A. R. Ferchmin ◽  
H. Puszkarski
Keyword(s):  
Magnetic Nanoparticles ◽  
Surface Anisotropy ◽  
Size Scaling ◽  
Resonance Modes ◽  
Surface Resonance

scholarly journals Surface anisotropy broadening of the energy barrier distribution in magnetic nanoparticles

2008 ◽  
Vol 19 (47) ◽  
pp. 475704 ◽  
Author(s):  
N Pérez ◽  
P Guardia ◽  
A G Roca ◽  
M P Morales ◽  
C J Serna ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Energy Barrier ◽  
Surface Anisotropy ◽  
Barrier Distribution

Evidence of surface anisotropy in magnetic nanoparticles

2006 ◽  
Vol 300 (1) ◽  
pp. e331-e334 ◽  
Author(s):  
D.S. Schmool ◽  
R. Rocha ◽  
J.B. Sousa ◽  
J.A.M. Santos ◽  
G. Kakazei
Keyword(s):  
Magnetic Nanoparticles ◽  
Surface Anisotropy

Cubic versus Spherical Magnetic Nanoparticles: The Role of Surface Anisotropy

2008 ◽  
Vol 130 (40) ◽  
pp. 13234-13239 ◽  
Author(s):  
G. Salazar-Alvarez ◽  
J. Qin ◽  
V. Šepelák ◽  
I. Bergmann ◽  
M. Vasilakaki ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Surface Anisotropy

Forced Wetting of Liquids Using Ultrasonic Surface Vibration

2018 ◽  
Author(s):  
Matthew A. Trapuzzano ◽  
Nathan B. Crane ◽  
Rasim Guldiken ◽  
Andrés Tejada-Martínez
Keyword(s):  
Low Frequency ◽  
Hydrophobic Surface ◽  
Wetting Transitions ◽  
High Frequencies ◽  
Surface Vibration ◽  
Resonance Modes ◽  
Energy Inputs ◽  
Surface Resonance ◽  
Industry Applications ◽  
Surface Vibrations

Many processes rely on wetting of liquids on surfaces. The way a liquid wets a solid depends on chemistry, geometry, and local energy inputs. Low-frequency surface vibrations can effect wetting changes prompted by droplet oscillations. High-frequency (ultrasonic) surface vibration can also cause a liquid to wet or spread out on a solid, but governing mechanisms are relatively uncharacterized. To investigate, droplets are imaged as they vibrate on a hydrophobic surface over different high frequencies (> 10 kHz). Wetting transitions occur abruptly over a range of parameters, but coincide with surface resonance modes. The wetting change is proportional to droplet volume and surface acceleration, and remains after cessation of vibration, however new droplets wet with the original contact angle. Wetting control has various industry applications, and understanding these basic phenomena will help develop a deeper understanding of how ultrasonic vibration can be utilized to tune the behavior of liquids on any surface.

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