Eichler-Volf A, Alsaadawi Y, Luna FV, Khan QA, Stierle S, Xu C, Heigl M, Fekri Z, Zhou S, Zahn P, Albrecht M, Steinhart M, Erbe A. Sensitivity of PS/CoPd Janus particles to an external magnetic field.
RSC Adv 2021;
11:17051-17057. [PMID:
35479683 PMCID:
PMC9032904 DOI:
10.1039/d1ra02410h]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/28/2021] [Indexed: 11/21/2022] Open
Abstract
The dual nature of Janus particles confers fascinating properties such as a response to multiple stimuli. In this communication, we systematically study the sensitivity to a uniform external magnetic field of isolated Janus rod-shaped and spherical particles in water confined to two dimensions. The Janus asymmetry of the particles is given by magnetic [Co(0.28 nm)/Pd(0.90 nm)]8 multilayer films deposited onto monodisperse polystyrene (PS) nanorods and microspheres, respectively. It is shown that the particles dispersed in water respond to weak magnetic field applied in in-plane direction. Here we demonstrate that a precise control of the in-plane particle orientation can be obtained for magnetic field strengths higher than 0.1 mT for microspheres and 0.4 mT for nanorods.
PS/CoPd Janus particles respond very sensitively to application of low external magnetic fields. Owing to the magnetic properties, the PS/CoPd particles may be used, for example, to sense the presence of weak magnetic fields as micro-magnetometers.![]()
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