LE QUY DON
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Magnetic nanoparticles embedded in microlasers for controlled transport in different sensing media

Mai, H.H. and Hoang, V.H. and Luu, M.Q. and Nguyen, T.T. and Nguyen, H.N. and Tien, D.X. and Khoi, G.M. and Nguyen, T.T. and Choi, Y. and Choi, W. and Ta, V.D. (2022) Magnetic nanoparticles embedded in microlasers for controlled transport in different sensing media. Journal of Physics D: Applied Physics, 55 (40). ISSN 00223727

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Abstract

In recent years, whispering gallery mode microlasers have attracted tremendous interest in sensing due to their ultra-high sensitivity at atomic levels. However, due to the non-magnetic properties, it is difficult to locate the microlasers at hard-to-reach positions, thus, limiting their sensing potential in many in-vitro and in-vivo applications. In this work, we report magnetic microlasers fabricated by encapsulating Ni0.2Zn0.8Fe2O4 magnetic nanoparticles (MNPs) within their cavity made of bovine serum albumin. The presence of MNPs allows the transportable actuation of the magnetic microlasers while maintaining lasing emission characteristics. Microlasers with various concentrations of MNPs are investigated to identify the optimum concentration that can balance a good magnetization, a low lasing threshold, and a high quality (Q) factor. These magnetic microlasers can be employed for sensing applications where sensors need to be navigated through different sensing media. As a proof of concept, we observed a clear shift of lasing wavelength of a magnetic microlaser while dragging it through different adjacent media by magnetic navigation. This result demonstrates the potential applications of magnetic microlasers for future biological and chemical applications. © 2022 IOP Publishing Ltd.

Item Type: Article
Divisions: Faculties > Faculty of Special Equipments
Identification Number: 10.1088/1361-6463/ac835f
Uncontrolled Keywords: Iron compounds; Magnetism; Mammals; Nickel compounds; Optical resonators; Whispering gallery modes, Atomic levels; Bovine serum albumins; Controlled transport; In-vitro; Microlaser; Ni x zn1−x fe2O4; Nonmagnetics; Ultra-high-sensitivity; Vitro and in vivo; Vivo applications, Zinc compounds
URI: http://eprints.lqdtu.edu.vn/id/eprint/10518

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