Magnetic Manipulation of Micro/Nano Objects

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "E:Engineering and Technology".

Deadline for manuscript submissions: closed (30 August 2022) | Viewed by 7174

Special Issue Editors

Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, China
Interests: magnetic manipulation; electromagnetic forming; high power terahertz wave source; electromagnetic measurement and instrumentation
Wuhan National High Magnetic Field Center & State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Interests: magnetic soft robotics; magnetic separation; magnetic levitation; electromagnetic forming
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Manipulation of micro/nano objects has numerous potential applications in various fields, including (but not limited to) engineering, medicine, physics, chemistry, and biology, which can be achieved using several types of external fields, such as the electric, magnetic, optical, and acoustic fields. Among them, magnetic field-based manipulation has attracted widespread attention over the past few decades due to its advantageous features, such as wireless remote actuation, high degree of controllability, programmability, and versatility. Although significant progress has been made in this field, there is still a long way to go in terms of the development of high-performance magnetic tools, multifunctional actuation strategies, and deep understanding of the mechanism of magnetically driven micro/nano objects. In this Special Issue, we welcome original research papers and review papers related to the applications (such as magnetic micro/nanorobots, colloidal assembly, separation, trapping, and mixing), fundamentals, design, and underlying mechanisms of magnetic manipulation of micro/nano objects, including analytical, numerical, and experimental analysis. We look forward to receiving your submissions.

Prof. Dr. Xiaotao Han
Prof. Dr. Quanliang Cao
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.

Keywords

  • magnetic manipulation
  • micro/nanorobots
  • colloidal assembly
  • separation
  • trapping
  • mixing

Published Papers (4 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

19 pages, 9515 KiB  
Article
Development of Tiny Vane-Type Magnetorheological Brake Considering Quality Function Deployment
by Agus Lutanto, U Ubaidillah, Fitrian Imaduddin, Seung-Bok Choi and Bhre Wangsa Lenggana
Micromachines 2023, 14(1), 26; https://0-doi-org.brum.beds.ac.uk/10.3390/mi14010026 - 22 Dec 2022
Cited by 4 | Viewed by 1093
Abstract
Many studies focus on the torque-to-dimension ratio when designing magnetorheological brakes (MRB), especially for ankle foot orthosis (AFO) devices. Vane MRB is one type of MRB with a limited angle of motion that is naturally suitable to be applied to AFO. However, very [...] Read more.
Many studies focus on the torque-to-dimension ratio when designing magnetorheological brakes (MRB), especially for ankle foot orthosis (AFO) devices. Vane MRB is one type of MRB with a limited angle of motion that is naturally suitable to be applied to AFO. However, very few implement quality function deployment (QFD) when making MRB, whereas QFD is an essential factor in making product designs. In this study, a tiny vane-type MR brake (TVMRB) was successfully made using the QFD method. Torque characteristics are determined by analysis of magnetic flux density, theoretically, by 3D simulation, and by using Ansys Maxwell experimentally. For consideration, the analysis was carried out with fluid gap variations (0.5 mm, 0.75 mm, and 1 mm) and current variations (0.5–2 A with 0.5 A increments). As a result, ignoring the leakage of MR fluid (MRF), at a constant rotation of 10 rpm, the smallest torque of 6.14 Nm was obtained at the fluid gap variation of 1 mm and input current of 0.5 A, whereas the largest torque was 46.71 Nm at the fluid gap variation of 0.5 mm and input current of 2 A. Apart from torque, this article will also discuss other brake performances in the form of operational range and power consumption. Finally, the structure of the TVMRB design is compared with other designs presented in the House of Quality (HOQ). Full article
(This article belongs to the Special Issue Magnetic Manipulation of Micro/Nano Objects)
Show Figures

Figure 1

25 pages, 6611 KiB  
Article
Magnetic Forces by Permanent Magnets to Manipulate Magnetoresponsive Particles in Drug-Targeting Applications
by Sandor I. Bernad and Elena Bernad
Micromachines 2022, 13(11), 1818; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13111818 - 25 Oct 2022
Cited by 3 | Viewed by 1725
Abstract
This study presents preliminary computational and experimental findings on two alternative permanent magnet configurations helpful for magnetic drug administration in vivo. A numerical simulation and a direct experimental measurement of the magnetic induction on the magnet system’s surface were used to map the [...] Read more.
This study presents preliminary computational and experimental findings on two alternative permanent magnet configurations helpful for magnetic drug administration in vivo. A numerical simulation and a direct experimental measurement of the magnetic induction on the magnet system’s surface were used to map the magnetic field. In addition, the ferrite-type (grade Y35) and permanent neodymium magnets (grade N52) to produce powerful magnetic forces were also examined analytically and quantitatively. Ansys-Maxwell software and Finite Element Method Magnetism (FEMM) version 4.2 were used for all numerical computations in the current investigation. For both magnets, the generated magnetic fields were comparatively studied for targeting Fe particles having a diameter of 6 μm. The following findings were drawn from the present investigation: (i) the particle deposition on the vessel wall is greatly influenced by the intensity of the magnetic field, the magnet type, the magnet size, and the magnetic characteristics of the micro-sized magnetic particles (MSMPs); (ii) ferrite-type magnets might be employed to deliver magnetoresponsive particles to a target location, even if they are less powerful than neodymium magnets; and (iii) the results from the Computational Fluid Dynamics( CFD) models agree well with the measured magnetic field induction, magnetic field strength, and their fluctuation with the distance from the magnet surface. Full article
(This article belongs to the Special Issue Magnetic Manipulation of Micro/Nano Objects)
Show Figures

Figure 1

8 pages, 877 KiB  
Article
Rolling Motion of a Soft Microsnowman under Rotating Magnetic Field
by Gokhan Kararsiz, Yasin Cagatay Duygu, Louis William Rogowski, Anuruddha Bhattacharjee and Min Jun Kim
Micromachines 2022, 13(7), 1005; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13071005 - 26 Jun 2022
Cited by 4 | Viewed by 2122
Abstract
This paper demonstrates a manipulation of snowman-shaped soft microrobots under a uniform rotating magnetic field. Each microsnowman robot consists of two biocompatible alginate microspheres with embedded magnetic nanoparticles. The soft microsnowmen were fabricated using a microfluidic device by following a centrifuge-based microfluidic droplet [...] Read more.
This paper demonstrates a manipulation of snowman-shaped soft microrobots under a uniform rotating magnetic field. Each microsnowman robot consists of two biocompatible alginate microspheres with embedded magnetic nanoparticles. The soft microsnowmen were fabricated using a microfluidic device by following a centrifuge-based microfluidic droplet method. Under a uniform rotating magnetic field, the microsnowmen were rolled on the substrate surface, and the velocity response for increasing magnetic field frequencies was analyzed. Then, a microsnowman was rolled to follow different paths, which demonstrated directional controllability of the microrobot. Moreover, swarms of microsnowmen and single alginate microrobots were manipulated under the rotating magnetic field, and their velocity responses were analyzed for comparison. Full article
(This article belongs to the Special Issue Magnetic Manipulation of Micro/Nano Objects)
Show Figures

Figure 1

19 pages, 24980 KiB  
Article
Field-Dependent Rheological Properties of Magnetorheological Elastomer with Fountain-Like Particle Chain Alignment
by Muhammad Akif Muhammad Fakhree, Nur Azmah Nordin, Nurhazimah Nazmi, Saiful Amri Mazlan, Siti Aishah Abdul Aziz, Ubaidillah Ubaidillah, Fauzan Ahmad and Seung-Bok Choi
Micromachines 2022, 13(4), 492; https://0-doi-org.brum.beds.ac.uk/10.3390/mi13040492 - 22 Mar 2022
Cited by 6 | Viewed by 1683
Abstract
Magnetorheological elastomer (MRE) consists of magnetic particles known as carbonyl iron (CIPs), which have been locked in a silicone-based matrix, in various alignments. However, current MRE exhibits inadequate rheological properties due to several issues such as particle alignments. Therefore, in this study, a [...] Read more.
Magnetorheological elastomer (MRE) consists of magnetic particles known as carbonyl iron (CIPs), which have been locked in a silicone-based matrix, in various alignments. However, current MRE exhibits inadequate rheological properties due to several issues such as particle alignments. Therefore, in this study, a new approach of the particle alignment of CIPs in MRE, namely fountain-like structure, is introduced. It is expected that this kind of MRE exhibits enhancement rheological responses, in off- and on-state conditions. This work includes the development of a new mold that can produce various directions of magnetic flux lines in order to have fountain-like structures of CIPs in MRE, during the curing process. Three types of particle alignments in MRE, namely isotropic, fountain-like and inverted fountain-like, are fabricated. The rheological properties of MRE in terms of storage modulus and MR effect are measured in an oscillatory shear mode using a rheometer. The results have revealed that fountain-like MRE exhibits higher storage modulus than the isotropic MRE, approximately 0.6 MPa of increment in the strain sweep test, in an on-state condition. Furthermore, it has been demonstrated from strain, frequency and the current sweep test that the rheological properties of fountain-like MRE related to storage modulus and magnetorheological (MR) effect are higher compared to the inverted fountain-like MRE. Full article
(This article belongs to the Special Issue Magnetic Manipulation of Micro/Nano Objects)
Show Figures

Figure 1

Back to TopTop