Magneto-electrical orientation of lipid-coated graphitic micro-particles in solution
We demonstrate, for the first time, confinement of the orientation of micron-sized graphitic flakes to a well-defined plane. We orient and rotationally trap lipid-coated highly ordered pyrolytic graphite (HOPG) micro-flakes in aqueous solution using a combination of uniform magnetic and AC electric...
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| Format: | Journal article |
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Royal Society of Chemistry
2016
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| _version_ | 1797055869081354240 |
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| author | Nguyen, J Antoranz Contera, S Llorente Garcia, I |
| author_facet | Nguyen, J Antoranz Contera, S Llorente Garcia, I |
| author_sort | Nguyen, J |
| collection | OXFORD |
| description | We demonstrate, for the first time, confinement of the orientation of micron-sized graphitic flakes to a well-defined plane. We orient and rotationally trap lipid-coated highly ordered pyrolytic graphite (HOPG) micro-flakes in aqueous solution using a combination of uniform magnetic and AC electric fields and exploiting the anisotropic diamagnetic and electrical properties of HOPG. Measuring the rotational Brownian fluctuations of individual oriented particles in rotational traps, we quantitatively determine the rotational trap stiffness, maximum applied torque and polarization anisotropy of the micro-flakes, as well as their dependency on the electric field frequency. Additionally, we quantify interactions of the micro-particles with adjacent glass surfaces with various surface treatments. We outline the various applications of this work, including torque sensing in biological systems. |
| first_indexed | 2024-03-06T19:15:25Z |
| format | Journal article |
| id | oxford-uuid:182e069e-ea06-4cea-a792-464d818c63e3 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:15:25Z |
| publishDate | 2016 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:182e069e-ea06-4cea-a792-464d818c63e32022-03-26T10:41:56ZMagneto-electrical orientation of lipid-coated graphitic micro-particles in solutionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:182e069e-ea06-4cea-a792-464d818c63e3Symplectic Elements at OxfordRoyal Society of Chemistry2016Nguyen, JAntoranz Contera, SLlorente Garcia, IWe demonstrate, for the first time, confinement of the orientation of micron-sized graphitic flakes to a well-defined plane. We orient and rotationally trap lipid-coated highly ordered pyrolytic graphite (HOPG) micro-flakes in aqueous solution using a combination of uniform magnetic and AC electric fields and exploiting the anisotropic diamagnetic and electrical properties of HOPG. Measuring the rotational Brownian fluctuations of individual oriented particles in rotational traps, we quantitatively determine the rotational trap stiffness, maximum applied torque and polarization anisotropy of the micro-flakes, as well as their dependency on the electric field frequency. Additionally, we quantify interactions of the micro-particles with adjacent glass surfaces with various surface treatments. We outline the various applications of this work, including torque sensing in biological systems. |
| spellingShingle | Nguyen, J Antoranz Contera, S Llorente Garcia, I Magneto-electrical orientation of lipid-coated graphitic micro-particles in solution |
| title | Magneto-electrical orientation of lipid-coated graphitic micro-particles in solution |
| title_full | Magneto-electrical orientation of lipid-coated graphitic micro-particles in solution |
| title_fullStr | Magneto-electrical orientation of lipid-coated graphitic micro-particles in solution |
| title_full_unstemmed | Magneto-electrical orientation of lipid-coated graphitic micro-particles in solution |
| title_short | Magneto-electrical orientation of lipid-coated graphitic micro-particles in solution |
| title_sort | magneto electrical orientation of lipid coated graphitic micro particles in solution |
| work_keys_str_mv | AT nguyenj magnetoelectricalorientationoflipidcoatedgraphiticmicroparticlesinsolution AT antoranzconteras magnetoelectricalorientationoflipidcoatedgraphiticmicroparticlesinsolution AT llorentegarciai magnetoelectricalorientationoflipidcoatedgraphiticmicroparticlesinsolution |