Relevant bibliographies by topics / Magnetic Tweezing

Academic literature on the topic 'Magnetic Tweezing'

Author: Grafiati
Published: 1 April 2023

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Journal articles on the topic "Magnetic Tweezing"

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Timonen, Jaakko V. I., and Bartosz A. Grzybowski. "Tweezing of Magnetic and Non-Magnetic Objects with Magnetic Fields." Advanced Materials 29, no. 18 (February 15, 2017): 1603516. http://dx.doi.org/10.1002/adma.201603516.

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Martinez-Pedrero, Fernando, Arthur V. Straube, Tom H. Johansen, and Pietro Tierno. "Functional colloidal micro-sieves assembled and guided above a channel-free magnetic striped film." Lab on a Chip 15, no. 7 (2015): 1765–71. http://dx.doi.org/10.1039/c5lc00067j.

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Sorting in motion: magnetic colloids driven above a channel-free magnetic substrate can be readily assembled into one-dimensional chains capable of performing sophisticated lab-on-a-chip functions, including trapping, sorting and tweezing.
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Timonen, Jaakko V. I., Ahmet F. Demirörs, and Bartosz A. Grzybowski. "Magnetic Tweezers: Magnetofluidic Tweezing of Nonmagnetic Colloids (Adv. Mater. 18/2016)." Advanced Materials 28, no. 18 (May 2016): 3413. http://dx.doi.org/10.1002/adma.201670121.

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Froltsov, V. A., C. N. Likos, and H. Löwen. "Colloids in inhomogeneous external magnetic fields: particle tweezing, trapping and void formation." Journal of Physics: Condensed Matter 16, no. 38 (September 11, 2004): S4103—S4114. http://dx.doi.org/10.1088/0953-8984/16/38/025.

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Probst, Roland, and Benjamin Shapiro. "Three-dimensional electrokinetic tweezing: device design, modeling, and control algorithms." Journal of Micromechanics and Microengineering 21, no. 2 (January 27, 2011): 027004. http://dx.doi.org/10.1088/0960-1317/21/2/027004.

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Shon, Min Ju, Sang-Hyun Rah, and Tae-Young Yoon. "Submicrometer elasticity of double-stranded DNA revealed by precision force-extension measurements with magnetic tweezers." Science Advances 5, no. 6 (June 2019): eaav1697. http://dx.doi.org/10.1126/sciadv.aav1697.

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Submicrometer elasticity of double-stranded DNA (dsDNA) governs nanoscale bending of DNA segments and their interactions with proteins. Single-molecule force spectroscopy, including magnetic tweezers (MTs), is an important tool for studying DNA mechanics. However, its application to short DNAs under 1 μm is limited. We developed an MT-based method for precise force-extension measurements in the 100-nm regime that enables in situ correction of the error in DNA extension measurement, and normalizes the force variability across beads by exploiting DNA hairpins. The method reduces the lower limit of tractable dsDNA length down to 198 base pairs (bp) (67 nm), an order-of-magnitude improvement compared to conventional tweezing experiments. Applying this method and the finite worm-like chain model we observed an essentially constant persistence length across the chain lengths studied (198 bp to 10 kbp), which steeply depended on GC content and methylation. This finding suggests a potential sequence-dependent mechanism for short-DNA elasticity.
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Cho, Soo Kyung, Soojung Kim, Tae Young Kang, Hyung Kook Kim, Kyujung Kim, and Yoon Hwae Hwang. "Controlled in situ capacitance sensing of single cell via simultaneous optical tweezing." Sensors and Actuators B: Chemical 321 (October 2020): 128512. http://dx.doi.org/10.1016/j.snb.2020.128512.

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Jia, Chenglong, Decheng Ma, Alexander F. Schäffer, and Jamal Berakdar. "Twisting and tweezing the spin wave: on vortices, skyrmions, helical waves, and the magnonic spiral phase plate." Journal of Optics 21, no. 12 (November 14, 2019): 124001. http://dx.doi.org/10.1088/2040-8986/ab4f8e.

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BRASSELET, E., and S. JUODKAZIS. "OPTICAL ANGULAR MANIPULATION OF LIQUID CRYSTAL DROPLETS IN LASER TWEEZERS." Journal of Nonlinear Optical Physics & Materials 18, no. 02 (June 2009): 167–94. http://dx.doi.org/10.1142/s0218863509004580.

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The high sensitivity of liquid crystals to external fields, especially electromagnetic fields, confer to them fascinating properties. In the case of light fields, their large optical nonlinearities over a broad spectrum have great application potential for all-optical devices. The linear optical properties of liquid crystals, such as their high refractive index, birefringence and transparency, are also of great practical interest in optofluidics, which combines the use of optical tools in microfluidic environments. A representative example is the laser micromanipulation of liquid crystalline systems using optical tweezing techniques. Liquid crystal droplets represent a class of systems that can be easily prepared and manipulated by light, with or without a nonlinear light-matter coupling. Here we review different aspects of quasi-statics and dynamical optical angular manipulation of liquid crystal droplets trapped in laser tweezers. In particular, we discuss to the influence of the phase (nematic, cholesteric or smectic), the bulk ordering symmetry, the droplet size, the polarization state and power of the trapping light, together with the prominent role of light–matter angular momentum exchanges and optical orientational nonlinearities.
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Shen, Yijie. "Rays, waves, SU(2) symmetry and geometry: toolkits for structured light." Journal of Optics 23, no. 12 (November 22, 2021): 124004. http://dx.doi.org/10.1088/2040-8986/ac3676.

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Abstract Structured light refers to the ability to tailor optical patterns in all its degrees of freedom, from conventional 2D transverse patterns to exotic forms of 3D, 4D, and even higher-dimensional modes of light, which break fundamental paradigms and open new and exciting applications for both classical and quantum scenarios. The description of diverse degrees of freedom of light can be based on different interpretations, e.g. rays, waves, and quantum states, that are based on different assumptions and approximations. In particular, recent advances highlighted the exploiting of geometric transformation under general symmetry to reveal the ‘hidden’ degrees of freedom of light, allowing access to higher dimensional control of light. In this tutorial, I outline the basics of symmetry and geometry to describe light, starting from the basic mathematics and physics of SU(2) symmetry group, and then to the generation of complex states of light, leading to a deeper understanding of structured light with connections between rays and waves, quantum and classical. The recent explosion of related applications are reviewed, including advances in multi-particle optical tweezing, novel forms of topological photonics, high-capacity classical and quantum communications, and many others, that, finally, outline what the future might hold for this rapidly evolving field.
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Book chapters on the topic "Magnetic Tweezing"

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Yellen, Benjamin. "Magnetic Forces and Torques: Separation, Tweezing, and Materials Assembly in Biology." In Biomedical Applications of Magnetic Particles, 33–57. First edition. | Boca Raton : CRC Press, 2021.: CRC Press, 2020. http://dx.doi.org/10.1201/9781315117058-3.

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Conference papers on the topic "Magnetic Tweezing"

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Sinha, Ashok, Ranjan Ganguly, and Ishwar K. Puri. "Magnetic Micromanipulation of a Single Magnetic Microsphere in a Microchannel." In ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96202.

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Magnetic microspheres are well known for their ability to provide high surface-to-volume ratio mobile reaction surfaces for chemical and biochemical reactions. Their use in microfluidic devices opens up novel avenues for uses in ‘lab-on-a-chip’ applications, e.g., as magnetic tweezers. Cantilevers and optical tweezers are widely used for micromanipulating cells or biomolecules in order to measure their mechanical properties, or for biosensor applications. However, they do not allow for ease of rotary motion and can sometimes damage the handled material. We present herein a system of magnetic tweezers that uses functionalized magnetic microspheres as mobile substrates for biological and biochemical reactions and offers better manipulation of the cells or organic molecules. The predominant transport issue for these magnetic tweezers is the precise magnetic manipulations of the microbeads so that the chemical/biological reactions at the bead surface are controlled. The best way to obtain unambiguous information about the behavior of particles is to begin with the study of a single isolated particle in a microchannel flow. We have conducted a fundamental study to manipulate an isolated magnetic microparticle using the concept of ‘action-at-a-distance’. An external magnetic field is used to direct and steer the particle across a microchannel. Such a study is directly pertinent to practical applications where usually a small number of such microspheres are utilized, such as DNA sequencing and separation, cell manipulation and separation, exploration of complex biomolecules by specific binding enabling folding and stretching, etc. Numerical simulation of the microchannel flow and particle manipulation is performed using a finite-volume transient CFD code and Lagrangian tracking of magnetic microspheres in the flow under an imposed magnetic field gradient. Experimental validation of the numerical results is then performed. The effects of varying viscosity and flowrate using two different particle sizes are investigated. Parametric study is performed to tune the external magnetic field so as to obtain a desired particle trajectory. Finally, the proof of concept demonstration of the magnetic tweezing is reported. We conclude that magnetic tweezers are viable and can be fabricated as part of a biocompatible setup that could become a suitable alternative to the other available micromanipulators.
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