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Precision manipulation of various liquids is essential in many fields such as various thermal, optical, and medical applications. This paper proposes an effective noncontact microdroplet separation method that is based on the action of corona discharge. A blade-plate electrode is constructed to generate an ionic wind, thereby enabling the droplet to be separated according to the shape of the blade electrode. Line, curve, S-shape, and parallel separation of the droplet can be realized in the experiment setup. Furthermore, experiment parameters, including the driving voltage, cutting speed, the distance of the upper and lower electrodes, cutting depth, etc., are discussed. Experimental results show that the proposed method is feasible and effective and can be used in application scenarios that require precise manipulation of droplets.
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http://dx.doi.org/10.1021/acs.langmuir.3c03035 | DOI Listing |
Proc Natl Acad Sci U S A
January 2024
Condensed Matter Department, J. Stefan Institute, Ljubljana SI-1000, Slovenia.
Mechanical properties of biological tissues fundamentally underlie various biological processes and noncontact, local, and microscopic methods can provide fundamental insights. Here, we present an approach for quantifying the local mechanical properties of biological materials at the microscale, based on measuring the spectral shifts of the optical resonances in droplet microcavities. Specifically, the developed method allows for measurements of deformations in dye-doped oil droplets embedded in soft materials or biological tissues with an error of only 1 nm, which in turn enables measurements of anisotropic stress inside tissues as small as a few pN/μm.
View Article and Find Full Text PDFMater Horiz
March 2024
Research Institute for Advanced Electronics and Photonics, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8565, Japan.
Langmuir
January 2024
School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
Precision manipulation of various liquids is essential in many fields such as various thermal, optical, and medical applications. This paper proposes an effective noncontact microdroplet separation method that is based on the action of corona discharge. A blade-plate electrode is constructed to generate an ionic wind, thereby enabling the droplet to be separated according to the shape of the blade electrode.
View Article and Find Full Text PDFRev Sci Instrum
October 2023
Indian Institute of Technology Madras, Chennai 600 036, India.
The synthesis of drug-loaded microparticles with precise control over size distribution and shape is crucial for achieving desired drug distribution in microparticles and tuning drug release profiles. Common large-scale production techniques produce microparticles with a broad particle size distribution and require challenging operating conditions. Recent methods employing microfluidics have enabled the production of microparticles with a uniform size distribution.
View Article and Find Full Text PDFAnal Sci
October 2023
School of Mechanical Engineering, Guangxi University, Guangxi Provincial, Nanning, 530004, China.
In this study, the innovative design of a new array microdroplet parallel-generation device is proposed based on the principle of fluid inertial force using a capillary glass needle. The entire device used an electromagnetic actuator as the power source. It was designed as a 9-channel parallel array of glass needles.
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