Print Email Facebook Twitter Measuring atto-grams of buoyant mass using silicon dioxide suspended microchannel resonators Title Measuring atto-grams of buoyant mass using silicon dioxide suspended microchannel resonators Author Mollaie Daryani, Mehdi (TU Delft Mechanical, Maritime and Materials Engineering; TU Delft Precision and Microsystems Engineering) Contributor Manzaneque Garcia, T. (mentor) Ghatkesar, M.K. (graduation committee) Verbiest, G.J. (graduation committee) Degree granting institution Delft University of Technology Programme Mechanical Engineering | Micro and Nano Engineering Date 2021-03-29 Abstract In connection with growing in applications of nanoparticles in various industrial sectors such as cosmetics and pharmaceuticals, the demand for in-line identification and characterization of nanoparticles suspended in fluids has increased. In addition to that, nanoparticles in general and nanoplastics in particular, can easily contaminate air and water resources, resulting in human health risks. Among available techniques, suspended microchannel resonators can respond to the characterization demands in terms of mass detection and concentration of nanoparticles in fluids. This technique is based on changes in resonance frequency of the suspended microchannel due to flowing of nanoparticles through the suspended hollow cantilever. In this project we aimed to characterise TUDelft made suspended microchannel resonators in terms of mass limit detection and speed of detection. We found that the lowest resolved mass can be detected by the second bending mode. This was 0.11 fg and0.38 fg using an empty and a water-filled resonator respectively, for a system bandwidth of 1000 Hz that corresponds to a system settling time of 0.37 ms. We also managed to measure a buoyant mass of 21.2 fg which is an equivalent gold nanoparticle of 130 nm in diameter, during one of the attempts to detect suspended gold nanoparticles in deionized water. Subject SMRSuspended Microchannel ResonatorMass SensorNanoparticlesAllan deviationQuality factorHollow CantileverMicrofluidicsNanoplasticsSilicon dioxide microchannel resonators To reference this document use: http://resolver.tudelft.nl/uuid:29b51990-761b-42a8-a75a-86b0c9c404ea Embargo date 2022-03-31 Part of collection Student theses Document type master thesis Rights © 2021 Mehdi Mollaie Daryani Files PDF Thesis_M._Mollaie_Daryani ... fluids.pdf 22.86 MB Close viewer /islandora/object/uuid:29b51990-761b-42a8-a75a-86b0c9c404ea/datastream/OBJ/view