Special Issue "Synthesis, Assembly and Functional Application of Nanomaterials in Microsystems"

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

Deadline for manuscript submissions: 10 October 2018

Special Issue Editors

Guest Editor
Prof. Chih-hung (Alex) Chang

School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR 97331-4003, USA
Website | E-Mail
Phone: +1-541-737-8548
Interests: thin film transsitors; photovoltaics; integrated chemical systems; nanomaterials; phase equilibria
Guest Editor
Dr. Ki-Joong Kim

National Energy Technology Laboratory (NETL) / US Department of Energy (DOE), 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA
E-Mail
Phone: +1-412-386-4526
Interests: nano energy; carbon sensors; metal organic framework; plasmonic nanoparticles

Special Issue Information

Dear Colleagues,

Microsystems are miniaturized devices which perform specific or combined functions for computation and information processing; sensing and actuation; testing and measurement; molecule and material processing. This special issue aims to showcase research papers, short communications, and review articles that focus on recent progress in synthesis, assembly and testing of nanomaterials using microsystems and the functional applications of nanomaterials in microsystems. The topics of interest include, but are not limited to:

The use of microfluidics to synthesize, assemble, purify and deliver nanomaterials, functional nanostructures, and nanostructured thin films.

The use of micromachines to manipulate, assemble, separate and fabricate nanomaterials, nanostructures, and nanostructured thin films.

The use of microsystems for nanomaterial characterizations e.g. MEMS-based mechanical testing.

Microsystems with integrated nanomaterials such as catalytic microreactors; electrochemical biosensors; neural prosthetics; gas micro-sensors; smart sensors/actuators for biomedical applications; and micro batteries.

Prof. Chih-hung (Alex) Chang
Dr. Ki-Joong Kim
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 papers will be 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 1200 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

  • Microsystem

  • Micromachines

  • Microfluidics

  • Microreactor

  • Nanomaterials

  • Nanoparticles

  • Nanostructures

  • Synthesis
  • Assembly

  • Purification

Published Papers (3 papers)

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Research

Open AccessArticle Characterization of Cotton Ball-like Au/ZnO Photocatalyst Synthesized in a Micro-Reactor
Micromachines 2018, 9(7), 322; https://doi.org/10.3390/mi9070322
Received: 20 May 2018 / Revised: 14 June 2018 / Accepted: 22 June 2018 / Published: 26 June 2018
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Abstract
Noble metal/metal oxide nanostructures are an efficient system in photocatalysis. Continuous and scalable production of advanced particle systems will be a requirement for commercial-scale deployment for many applications, including photocatalysis. In this work, Au/ZnO structures were synthesized in a continuous flow micro-reactor at
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Noble metal/metal oxide nanostructures are an efficient system in photocatalysis. Continuous and scalable production of advanced particle systems will be a requirement for commercial-scale deployment for many applications, including photocatalysis. In this work, Au/ZnO structures were synthesized in a continuous flow micro-reactor at room temperature and the detailed characteristics of the product indicate a specific cotton ball-like core-shell microstructure that showcases specific advantages compared to traditional batch synthesis methods. The formation pathway of the core-shell Au/ZnO structures is discussed with the pH-dependent speciation diagram, and photocatalytic activity was assessed under simulated sunlight, demonstrating the enhanced performance of the cotton ball-like Au/ZnO microstructures in photocatalytic dye degradation. This work describes the application of microreaction technology in the continuous production of metal/metal oxide photocatalysts. Full article
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Open AccessArticle Micro Droplet Formation towards Continuous Nanoparticles Synthesis
Micromachines 2018, 9(5), 248; https://doi.org/10.3390/mi9050248
Received: 26 April 2018 / Revised: 12 May 2018 / Accepted: 15 May 2018 / Published: 18 May 2018
Cited by 1 | PDF Full-text (2148 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
In this paper, micro droplets are generated in a microfluidic focusing contactor and then they move sequentially in a free-flowing mode (no wall contact). For this purpose, two different micro-flow glass devices (hydrophobic and hydrophilic) were used. During the study, the influence of
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In this paper, micro droplets are generated in a microfluidic focusing contactor and then they move sequentially in a free-flowing mode (no wall contact). For this purpose, two different micro-flow glass devices (hydrophobic and hydrophilic) were used. During the study, the influence of the flow rate of the water phase and the oil phase on the droplet size and size distribution was investigated. Moreover, the influence of the oil phase viscosity on the droplet size was analyzed. It was found that the size and size distribution of the droplets can be controlled simply by the aqueous phase flow rate. Additionally, 2D simulations to determine the droplet size were performed and compared with the experiment. Full article
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Open AccessArticle Capillary Rise of Nanostructured Microwicks
Micromachines 2018, 9(4), 153; https://doi.org/10.3390/mi9040153
Received: 10 February 2018 / Revised: 21 March 2018 / Accepted: 26 March 2018 / Published: 28 March 2018
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Abstract
Capillarity refers to the driving force to propel liquid through small gaps in the absence of external forces, and hence enhanced capillary force has been pursued for various applications. In this study, flower like ZnO nanostructures are successfully deposited to enhance capillarity of
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Capillarity refers to the driving force to propel liquid through small gaps in the absence of external forces, and hence enhanced capillary force has been pursued for various applications. In this study, flower like ZnO nanostructures are successfully deposited to enhance capillarity of microwick structures that are specially designed to augment boiling heat transfer performance. Microreactor-assisted nanomaterial deposition, MANDTM, is employed with a flow cell to deposit the ZnO nanostructures on a large sized microwick (4.3 cm × 10.7 cm) with dual-channel configuration. A capillary rise experiment based on the mass gain method is first performed using water and ethanol (EtOH) as the working liquids to demonstrate the enhanced capillary force induced by the ZnO nanostructure on the microwick structure. It is found that the coating of ZnO nanostructure effectively propels the working fluids through the nano- or micro pores created from the ZnO nanostructure and consequently improves the capillary force. In order to investigate the wicking mechanism of the ZnO coated microwick structure, the capillary rise result based on height measurement was compared with analytical models. It is found that the gravity effect and viscous force play an important role in wicking rise of the coated wick structure. This study aims at demonstrating the capability of the integrated MAND process with a flow cell for producing a large scaled nanostructured surface, which eventually has a great potential for enhanced boiling heat transfer. Full article
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