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Micromachines
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Advances in Acoustic Microfluidics
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Advances in Acoustic Microfluidics

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 September 2021) | Viewed by 5166

Special Issue Editors

Dr. Adem Ozcelik

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Guest Editor
Department of Mechanical Engineering, Aydın Adnan Menderes University, 09010 Aydın, Turkey
Interests: microfluidics; acoustic in microfluidics; acoustofluidics
Prof. Dr. Tony Jun Huang

E-Mail Website
Guest Editor
Department of Mechanical Engineering and Materials Science, Pratt School of Engineering, Duke University, Durham, NC 27708, USA
Interests: acoustofluidics; acoustics; fluid mechanics; micro/nano engineering; biomedical engineering; bioinstrumentation and nanomaterials

Special Issue Information

Dear Colleagues,

Since the inception of the field of acoustofluidics, significant progress has been shown within the realm of microfluidics and micro-machines.  From acoustically powered micro-machines to cell–cell interactions, acoustic waves have been implemented in numerous applications in physical, chemical, biological and engineering research. The interaction of sound waves with solids, liquids and gasses offers highly versatile means of translational and rotational manipulation capacity in acoustic tweezers. For example, size, density, or stiffness-based cell isolation methods have been explored as new methods of liquid biopsy for cancer diagnostics and research. This growing field of acoustic microfluidics holds strong promise for a wide range of in vivo studies, in part, owing to the tissue penetration nature of sound waves, which, being non-invasive, can be applied as low-power gentle waves or, proving their versatility, as a high-power probe to intervene with cells and tissues. This dexterity and versatility make acoustofluidics an important field to be explored further to advance the technology and solve new and more challenging problems. Thus, we invite you to contribute to this new Special Issue with research papers, communications, and review articles to further develop this field from technological innovations to clinical applications.

Dr. Adem Ozcelik
Prof. Dr. Tony Jun Huang
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

  • Acoustofluidics
  • Acoustophresis
  • Acoustofluidic cell separation
  • Acoustically powered micro-machines
  • Acoustic manipulation
  • Acoustofluidic single-cell studies
  • Acoustic tweezers

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Published Papers (2 papers)

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Research

8 pages, 3199 KiB  
Article
Acoustic Bessel Vortex Beam by Quasi-Three-Dimensional Reflected Metasurfaces
by Yin Wang, Jiao Qian, Jian-Ping Xia, Yong Ge, Shou-Qi Yuan, Hong-Xiang Sun and Xiao-Jun Liu
Micromachines 2021, 12(11), 1388; https://doi.org/10.3390/mi12111388 - 12 Nov 2021
Cited by 8 | Viewed by 2412
Abstract
Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles. In acoustics, vortex beams are generally observed on the surface of [...] Read more.
Vortex beams have a typical characteristic of orbital angular momentum, which provides a new degree of freedom for information processing in remote communication and a form of non-contact manipulation for trapping particles. In acoustics, vortex beams are generally observed on the surface of a metamaterial structure or in a waveguide with a hard boundary owing to the characteristic of easy diffusion in free space. The realization of an acoustic vortex beam with a long-distance propagation in free space still remains a challenge. To overcome this, we report a type of acoustic Bessel vortex (ABV) beam created by a quasi-three-dimensional reflected metasurface in free space based on phase modulation. By using the Bessel and vortex phase profiles, we can realize an ABV beam with the high performances of both Bessel and vortex beams, and its effective propagation distance is larger than 9.2λ in free space. Beyond that, we discuss the bandwidth and topological charge of the ABV beam in detail, and the fractional bandwidth can reach about 0.28. The proposed ABV beam has the advantages of a high-performance vortex, long-distance propagation, and broad bandwidth, which provide a new pathway for designing multifunctional vortex devices with promising applications. Full article
(This article belongs to the Special Issue Advances in Acoustic Microfluidics)
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8 pages, 1110 KiB  
Article
Measurement of the Thermal Effect of Standing Surface Acoustic Waves in Microchannel by Fluoresence Intensity
by Yiqing Li, Shoupeng Wei and Tengfei Zheng
Micromachines 2021, 12(8), 934; https://doi.org/10.3390/mi12080934 - 6 Aug 2021
Cited by 4 | Viewed by 1782
Abstract
Temperature is an important parameter for many medical and biological applications. It is key to measuring the temperature of acoustofluidics devices for controlling the device’s temperature. In this paper, Rhodamine B was used to measure the temperature change of the microchannel induced by [...] Read more.
Temperature is an important parameter for many medical and biological applications. It is key to measuring the temperature of acoustofluidics devices for controlling the device’s temperature. In this paper, Rhodamine B was used to measure the temperature change of the microchannel induced by the SSAWs’ thermal effect in microfluidics. A thermocouple was integrated into the microfluidics device to calibrate the relationship between the fluorescent intensity ratios of Rhodamine B and the temperature. Then, the fluid temperature in the microchannel heated by the SSAWs was measured by the fluorescent signal intensity ratio in the acoustofluidics device. The fluid temperature with different input voltages and different flow rates was measured. The results show that SSAWs can heat the still fluid rapidly to 80 °c, and the flow rates will influence the temperature of the fluid. The results will be useful for precisely controlling the temperature of acoustofluidics devices. Full article
(This article belongs to the Special Issue Advances in Acoustic Microfluidics)
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