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Micromachines
Special Issues
Mechanical Systems Approaching Nanoscales and Beyond
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Mechanical Systems Approaching Nanoscales and Beyond

A special issue of Micromachines (ISSN 2072-666X).

Deadline for manuscript submissions: closed (15 February 2017) | Viewed by 17754

Special Issue Editors

Prof. Dr. Yun Daniel Park

E-Mail Website
Guest Editor
Department of Physics & Astronomy, Seoul National University, Seoul 151-747, Korea
Interests: NEMS; materials physics experiment; spintronics
Prof. Dr. Taejoon Kouh

E-Mail Website
Guest Editor
Department of Nano & Electronic Physics, Kookmin University, Seoul, Korea
Interests: NEMS; optical detection; sensor; nanofabrication

Special Issue Information

Dear Colleagues,

Uniquely mechanical systems scale well at reduced dimensions. Various forms of energies easily transduce with mechanical systems, allowing for enhanced sensitivities and functionalities to mechanical sensors and actuators at nanoscales. Moreover, mechanical systems at reduced dimensions readily exhibit nonlinearity, which poses a challenge, as well as new opportunities. With the advent of new nanomachining techniques, along with integration of novel low-dimensional material systems, mechanical systems beyond nanoscales are on the horizon, with unprecedented speeds and sensitivities. Nanomechanical systems are poised for the technological development of new classes of low-power devices, including for sensing, logic, and memory applications, as well as a means to study fundamental phenomena at reduced dimensions. This Special Issue invites contributions on, but not limited to:

  • Novel nanomechanics enabled sensors and devices;
  • Nonlinearity in mechanical systems at nanoscale;
  • Mechanical systems from novel low-dimensional material systems;
  • Novel fabrication, transduction, and measurement techniques of mechanical systems at nanoscale.

Both research articles and review articles are welcome.

Prof. Dr. Yun Daniel Park
Prof. Dr. Taejoon Kouh
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (3 papers)

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Research

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1040 KiB  
Article
Field-Dependent Resonant Behavior of Thin Nickel Film-Coated Microcantilever
by Yunhee Park, Eun Joong Lee and Taejoon Kouh
Micromachines 2017, 8(4), 109; https://doi.org/10.3390/mi8040109 - 01 Apr 2017
Cited by 3 | Viewed by 3672
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Mechanical Systems Approaching Nanoscales and Beyond)
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3410 KiB  
Article
Free-Standing GaMnAs Nanomachined Sheets for van der Pauw Magnetotransport Measurements
by Jae-Hyun Lee, Seondo Park, Chanuk Yang, Hyung Kook Choi, Myung Rae Cho, Sung Un Cho and Yun Daniel Park
Micromachines 2016, 7(12), 223; https://doi.org/10.3390/mi7120223 - 09 Dec 2016
Cited by 2 | Viewed by 5904
Abstract
We report on the realization of free-standing GaMnAs epilayer sheets using nanomachining techniques. By optimizing the growth conditions of the sacrificial Al0.75Ga0.25As layer, free-standing metallic GaMnAs (with ~6% Mn) microsheets (with TC ~85 K) with integrated electrical probes [...] Read more.
We report on the realization of free-standing GaMnAs epilayer sheets using nanomachining techniques. By optimizing the growth conditions of the sacrificial Al0.75Ga0.25As layer, free-standing metallic GaMnAs (with ~6% Mn) microsheets (with TC ~85 K) with integrated electrical probes are realized for magnetotransport measurements in the van der Pauw geometry. GaMnAs epilayer needs to be physically isolated to avoid buckling effects stemming from the release of lattice mismatch strain during the removal of the AlGaAs sacrificial layer. From finite element analysis, symmetrically placed and serpentine-shaped electrical leads induce minimal thermal stress at low temperatures. From magnetotransport measurements, changes in magnetic anisotropy are readily observed. Full article
(This article belongs to the Special Issue Mechanical Systems Approaching Nanoscales and Beyond)
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Review

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3541 KiB  
Review
Nanomechanical Motion Transducers for Miniaturized Mechanical Systems
by Taejoon Kouh, M. Selim Hanay and Kamil L. Ekinci
Micromachines 2017, 8(4), 108; https://doi.org/10.3390/mi8040108 - 01 Apr 2017
Cited by 32 | Viewed by 7695
Abstract
Reliable operation of a miniaturized mechanical system requires that nanomechanical motion be transduced into electrical signals (and vice versa) with high fidelity and in a robust manner. Progress in transducer technologies is expected to impact numerous emerging and future applications of micro- and, [...] Read more.
Reliable operation of a miniaturized mechanical system requires that nanomechanical motion be transduced into electrical signals (and vice versa) with high fidelity and in a robust manner. Progress in transducer technologies is expected to impact numerous emerging and future applications of micro- and, especially, nanoelectromechanical systems (MEMS and NEMS); furthermore, high-precision measurements of nanomechanical motion are broadly used to study fundamental phenomena in physics and biology. Therefore, development of nanomechanical motion transducers with high sensitivity and bandwidth has been a central research thrust in the fields of MEMS and NEMS. Here, we will review recent progress in this rapidly-advancing area. Full article
(This article belongs to the Special Issue Mechanical Systems Approaching Nanoscales and Beyond)
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