Size and shape dependent rotation characteristics of thin film ultrasonic rotors
نویسندگان
چکیده
The controlled rotation of acoustically levitated samples is beneficial for analyzing sample properties, e.g., in a recently reported room temperature x-ray diffraction experiment, wherein thin film holders comprising disks with short blades attached around their circumference were utilized. However, the mechanism producing torque and determinant factor direction these planar ultrasonic rotors have been elusive. We, therefore, study impact size shape on characteristics air further influence viscosity fluid. Theory experiment demonstrate essential role acoustic both water. In airborne case, arrangement are found to determine direction. water, dynamic 55 times higher than that air, we down 25- μm-disk-diameter function an optimized experimental geometry approximately same actuation efficiency as air. Our results will be improve applicability experiments explore micrometer-scale liquid.
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2022
ISSN: ['1520-8842', '0003-6951', '1077-3118']
DOI: https://doi.org/10.1063/5.0126000