Surface area enhancement of microcantilevers by femto-second laser irradiation

Kumar, and Jayant; Rajauria, Sukumar; Huo, Haibin; Ozsun, Ozgur; Rykaczewski, Konrad; Kumar, Jayant; Ekinci, K. L.

doi:10.1063/1.3701163

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…The electrons located at the structural defects in the lattice require a smaller amount of energy to leave the crystal than that required by the other electrons. One of the ways for the crystal system to recover the equilibrium condition is to segregate its constituent elements …”

Section: Qtaim Results Of the Charge Density ρBcp At The (3 −1) Bomentioning

confidence: 99%

Laser/Electron Irradiation on Indium Phosphide (InP) Semiconductor: Promising Pathways to In Situ Formation of Indium Nanoparticles

Assis

Macedo

Machado

et al. 2018

Part & Part Syst Charact

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In the current study, whether femtosecond laser and electron beam irradiation of indium phosphide (InP) are “green,” fast, and effective methods to produce metallic In nanoparticles is probed. High‐resolution transmission electron microscopy and energy‐dispersive X‐ray spectroscopy are employed to investigate the formation and growth of In nanoparticles on InP. Density functional theory and quantum theory of atoms in molecules calculations are employed to reveal the nature of formation of In nanoparticles under electron beam irradiation. These results expand the fundamental understanding of the atomic processes underpinning the mechanism of In−P bond rupture during the transformation process induced by the electron irradiation of the InP crystal by increasing the total number of electrons in the bulk structure.

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Section: Qtaim Results Of the Charge Density ρBcp At The (3 −1) Bomentioning

confidence: 99%

Laser/Electron Irradiation on Indium Phosphide (InP) Semiconductor: Promising Pathways to In Situ Formation of Indium Nanoparticles

Assis

Macedo

Machado

et al. 2018

Part & Part Syst Charact

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“…These suggest that the mechanical energy loss might be influenced by other factors, which are not clearly identified in this work. Some of the possibilities are that the surface friction which these thermally-evaporated magnetostrictive films experience might be sample-dependent, with deviations in the surface morphology and inhomogeneity in film, since the surface effect in the miniaturized mechanical resonators has been well-known for its crucial role in the mechanical dissipation [ 21 , 22 , 23 ]. We are not currently sure of the exact origin of this variation in

, but further work on this might be found interesting, possibly leading to detailed understanding of surface mechanics in micro-/nanoscale mechanical resonators.…”

Section: Resultsmentioning

confidence: 99%

Field-Dependent Resonant Behavior of Thin Nickel Film-Coated Microcantilever

Park¹,

Lee²,

Kouh³

2017

Micromachines

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Herein we describe the vibration of a thin nickel film-coated microcantilever at resonance under an external magnetic field. The resonance frequency and the mechanical loss—experimentally observed while varying the magnetic field—closely follow the field-dependence of the magnetostriction coefficient, indicating the strong coupling between the mechanical motion and the magnetostriction through the surface stress. Comparing to the surface stress model based on uniformly distributed axial load, the magnetostriction coefficient of a nickel film has been estimated, and its value is comparable to the reported one. Our study suggests that the nature of the surface stress originating from the magnetostrictive film can govern and modulate the resonant behavior of miniaturized mechanical systems.

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“…Very high temperatures (several hundred of degrees) have been measured for example by Raman scattering for laser powers of the order of 10 mW [25,27,28]. Permanent surface modification [29] or unwanted damage * ludovic.bellon@ens-lyon.fr to the tip [23] have been observed in some experiments, pointing at the temperature reaching the melting point of the material of the cantilever, above 1000 • C. The effect will be more pronounced in vacuum noteworthily, since heat has no other efficient way out than through the tiny cross-section of the cantilever, producing a noticeable temperature rise of the probe. This photo-thermal effect can be useful in some applications, for example to drive a cantilever at its resonance in dynamic measurements [23,24,[30][31][32], or to heat the AFM tip and control local phase changes of a sample [33].…”

Section: Introductionmentioning

confidence: 99%

Resonance frequency shift of strongly heated micro-cantilevers

Sandoval,

Geitner,

Bertin

et al. 2015

Preprint

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In optical detection setups to measure the deflection of micro-cantilevers, part of the sensing light is absorbed, heating the mechanical probe. We present experimental evidences of a frequency shift of the resonant modes of a cantilever when the light power of the optical measurement set-up is increased. This frequency shift is a signature of the temperature rise, and presents a dependence on the mode number. An analytical model is derived to take into account the temperature profile along the cantilever, it shows that the frequency shifts are given by an average of the profile weighted by the local curvature for each resonant mode. We apply this framework to measurements in vacuum and demonstrate that huge temperatures can be reached with moderate light intensities: a thousand • C with little more than 10 mW. We finally present some insight into the physical phenomena when the cantilever is in air instead of vacuum.

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Surface area enhancement of microcantilevers by femto-second laser irradiation

Cited by 4 publications

References 14 publications

Laser/Electron Irradiation on Indium Phosphide (InP) Semiconductor: Promising Pathways to In Situ Formation of Indium Nanoparticles

Laser/Electron Irradiation on Indium Phosphide (InP) Semiconductor: Promising Pathways to In Situ Formation of Indium Nanoparticles

Field-Dependent Resonant Behavior of Thin Nickel Film-Coated Microcantilever

Resonance frequency shift of strongly heated micro-cantilevers

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