Micro-Tweezers, Integrated Sensors and Micro-Manipulations Techniques

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 2713

Special Issue Editor

Modeling, Simulation and CAD Laboratory, National Institute for Research and Development in Microtechnologies—IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania
Interests: MEMS; Microgrippers; polymer; Microtweezers; nanomaterials; FEM; simulations; modelling
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Special Issue Information

Dear Colleagues,

Micro-tweezers are essential end-effectors used for different applications regarding the manipulation of delicate micro-objects. A compact structure with an integrated actuator and sensor is preferred in order to obtain a real-time response from the gripping force. The various manipulation actions include the handling, pick-and-place, gripping and positioning operations which are appropriate in diverse domains, such as micro-robotics, micro-assembly, biology and medicine.

In this Special Issue, we aim to highlight some of the recent developments regarding micro-tweezers’ structures, the integration of different sensors, structural advanced materials used for fabrication and the micro-manipulations techniques. We invite research papers and reviews that focus on tethered or untethered micro-tweezers for the manipulation, fabrication, or characterization of micro/nano-sized objects. Topics of particular interest include, but are not limited to, modeling and simulation, design, fabrication, as well as characterization at small scales and experiments.

Dr. Rodica Voicu
Guest Editor

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Keywords

  • micro-grippers
  • micro-tweezers
  • design, modelling and simulation of tweezers
  • fabrication of tweezers
  • characterization of tweezers
  • position and force sensing at small scales
  • sensors for micromanipulation
  • integrated sensors
  • microrobotics
  • micro and nano manipulation

Published Papers (2 papers)

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Research

13 pages, 3025 KiB  
Article
Thomson–Einstein’s Tea Leaf Paradox Revisited: Aggregation in Rings
Micromachines 2023, 14(11), 2024; https://doi.org/10.3390/mi14112024 - 30 Oct 2023
Viewed by 1007
Abstract
A distinct particle focusing spot occurs in the center of a rotating fluid, presenting an apparent paradox given the presence of particle inertia. It is recognized, however, that the presence of a secondary flow with a radial component drives this particle aggregation. In [...] Read more.
A distinct particle focusing spot occurs in the center of a rotating fluid, presenting an apparent paradox given the presence of particle inertia. It is recognized, however, that the presence of a secondary flow with a radial component drives this particle aggregation. In this study, we expand on the examination of this “Thomson–Einstein’s tea leaf paradox” phenomenon, where we use a combined experimental and computational approach to investigate particle aggregation dynamics. We show that not only the rotational velocity, but also the vessel shape, have a significant influence on a particle’s equilibrium position. We accordingly demonstrate the formation of a single focusing spot in a vessel center, as has been conclusively demonstrated elsewhere, but also the repeatable formation of stable ring-shaped particle arrangements. Full article
(This article belongs to the Special Issue Micro-Tweezers, Integrated Sensors and Micro-Manipulations Techniques)
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16 pages, 5916 KiB  
Article
An Aluminum Electro-Thermally Actuated Micro-Tweezer: Manufacturing and Characterization
Micromachines 2023, 14(4), 797; https://doi.org/10.3390/mi14040797 - 31 Mar 2023
Viewed by 1116
Abstract
In this paper, we present the investigations of an aluminum micro-tweezer designed for micromanipulation applications. It includes design, simulation, fabrication, characterizations, and experimental measurements. Electro-thermo-mechanical FEM-based simulations using COMSOL Multiphysics were performed to describe the behavior of the micro-electro-mechanical system (MEMS) device. The [...] Read more.
In this paper, we present the investigations of an aluminum micro-tweezer designed for micromanipulation applications. It includes design, simulation, fabrication, characterizations, and experimental measurements. Electro-thermo-mechanical FEM-based simulations using COMSOL Multiphysics were performed to describe the behavior of the micro-electro-mechanical system (MEMS) device. The micro-tweezers were fabricated in aluminum, as structural material, by surface micromachining processes. Experimental measurements were performed and compared with the simulation results. A micromanipulation experiment was performed using titanium microbeads from 10–30 µm to confirm the performance of the micro-tweezer. This study serves as further research regarding the using of aluminum as structural material for MEMS devices designated for pick-and-place operations. Full article
(This article belongs to the Special Issue Micro-Tweezers, Integrated Sensors and Micro-Manipulations Techniques)
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