10 October 2012 Correlation function analysis of optically trapped paramagnetic microparticles in external magnetic field
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Abstract
Correlation function analysis combined with optical tweezers technique is proposed for studying of magnetic interaction influence on statistical properties of microparticles Brownian motion in liquid. It is shown that autocorrelation function of Brownian particle displacements from optical trap center contains information about particles rotation frequency in rotating magnetic field. Powerful method based on correlation analysis to detect the interaction between paramagnetic microparticles in a constant magnetic field is suggested. Experimental results show that magnetic interaction changes cross-correlation function of nanometer displacements of two optically trapped particles in a constant external magnetic field.
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Maria N. Skryabina, Maria N. Skryabina, Evgeny V. Lyubin, Evgeny V. Lyubin, Maria D. Khokhlova, Maria D. Khokhlova, Andrey A. Fedyanin, Andrey A. Fedyanin, "Correlation function analysis of optically trapped paramagnetic microparticles in external magnetic field", Proc. SPIE 8458, Optical Trapping and Optical Micromanipulation IX, 84580G (10 October 2012); doi: 10.1117/12.929199; https://doi.org/10.1117/12.929199
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