Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes

Autores: Godoy, M.; Moreno, A.J.; Jorge, G.A.; Ferrari, H.J.; Antonel, P.S.; Mietta, J.L.; Ruiz, M.; Negri, R.M.; Pettinari, M.J.; Bekeris, V.
Año de publicación: 2012
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: We report micrometric periodic assembly of live and dead magnetotactic bacteria, Magnetospirillum magneticum AMB-1, which synthesize chains of magnetic nanoparticles inside their bodies, and of superparamagnetic Fe 3 O 4 and ferromagnetic CoFe 2 O 4 nanoparticles in aqueous suspensions using periodically magnetized audio tapes. The distribution of the stray magnetic field at the surface of the tapes was determined analytically and experimentally by magneto-optic imaging. Calculations showed that the magnetic field close to the tape surface was of the order of 100 mT, and the magnetic field gradient was larger than 1 T mm -1 . Drops of aqueous solutions were deposited on the tapes, and bacteria and particles were trapped at locations where magnetic energy is minimized, as observed using conventional optical microscopy. Suspensions of M. magneticum AMB-1 treated with formaldehyde and kanamycin were studied, and patterns of trapped dead bacteria indicated that magnetic forces dominate over self-propelling forces in these experiments, in accordance with calculated values. The behavior of the different types of samples is discussed. © 2012 American Institute of Physics.
Fil:Jorge, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Ferrari, H.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Antonel, P.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Ruiz, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Negri, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Pettinari, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fil:Bekeris, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente: J Appl Phys 2012;111(4)
Materia: Aqueous suspensions
Calculated values
Kanamycins
Magnetic energies
Magnetic field gradient
Magnetic force
Magnetic nanoparticles
Magneto-optic imaging
Magnetotactic Bacteria
Stray magnetic fields
Superparamagnetics
Tape surfaces
Bacteria
Magnetic amplifiers
Magnetic fields
Nanoparticles
Optical microscopy
Superparamagnetism
Suspensions (fluids)
Synthesis (chemical)
Suspensions (components)
Nivel de accesibilidad: acceso abierto
Condiciones de uso: http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Institución: Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador: paperaa:paper_00218979_v111_n4_p_Godoy

Acceder

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network_acronym_str	BDUBAFCEN
repository_id_str	1896
network_name_str	Biblioteca Digital (UBA-FCEN)
spelling	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapesGodoy, M.Moreno, A.J.Jorge, G.A.Ferrari, H.J.Antonel, P.S.Mietta, J.L.Ruiz, M.Negri, R.M.Pettinari, M.J.Bekeris, V.Aqueous suspensionsCalculated valuesKanamycinsMagnetic energiesMagnetic field gradientMagnetic forceMagnetic nanoparticlesMagneto-optic imagingMagnetotactic BacteriaStray magnetic fieldsSuperparamagneticsTape surfacesBacteriaMagnetic amplifiersMagnetic fieldsNanoparticlesOptical microscopySuperparamagnetismSuspensions (fluids)Synthesis (chemical)Suspensions (components)We report micrometric periodic assembly of live and dead magnetotactic bacteria, Magnetospirillum magneticum AMB-1, which synthesize chains of magnetic nanoparticles inside their bodies, and of superparamagnetic Fe 3 O 4 and ferromagnetic CoFe 2 O 4 nanoparticles in aqueous suspensions using periodically magnetized audio tapes. The distribution of the stray magnetic field at the surface of the tapes was determined analytically and experimentally by magneto-optic imaging. Calculations showed that the magnetic field close to the tape surface was of the order of 100 mT, and the magnetic field gradient was larger than 1 T mm -1 . Drops of aqueous solutions were deposited on the tapes, and bacteria and particles were trapped at locations where magnetic energy is minimized, as observed using conventional optical microscopy. Suspensions of M. magneticum AMB-1 treated with formaldehyde and kanamycin were studied, and patterns of trapped dead bacteria indicated that magnetic forces dominate over self-propelling forces in these experiments, in accordance with calculated values. The behavior of the different types of samples is discussed. © 2012 American Institute of Physics.Fil:Jorge, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Ferrari, H.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Antonel, P.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Ruiz, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Negri, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Pettinari, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Bekeris, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2012info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00218979_v111_n4_p_GodoyJ Appl Phys 2012;111(4)reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-29T13:43:00Zpaperaa:paper_00218979_v111_n4_p_GodoyInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:43:01.662Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes
title	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes
spellingShingle	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes Godoy, M. Aqueous suspensions Calculated values Kanamycins Magnetic energies Magnetic field gradient Magnetic force Magnetic nanoparticles Magneto-optic imaging Magnetotactic Bacteria Stray magnetic fields Superparamagnetics Tape surfaces Bacteria Magnetic amplifiers Magnetic fields Nanoparticles Optical microscopy Superparamagnetism Suspensions (fluids) Synthesis (chemical) Suspensions (components)
title_short	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes
title_full	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes
title_fullStr	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes
title_full_unstemmed	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes
title_sort	Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes
dc.creator.none.fl_str_mv	Godoy, M. Moreno, A.J. Jorge, G.A. Ferrari, H.J. Antonel, P.S. Mietta, J.L. Ruiz, M. Negri, R.M. Pettinari, M.J. Bekeris, V.
author	Godoy, M.
author_facet	Godoy, M. Moreno, A.J. Jorge, G.A. Ferrari, H.J. Antonel, P.S. Mietta, J.L. Ruiz, M. Negri, R.M. Pettinari, M.J. Bekeris, V.
author_role	author
author2	Moreno, A.J. Jorge, G.A. Ferrari, H.J. Antonel, P.S. Mietta, J.L. Ruiz, M. Negri, R.M. Pettinari, M.J. Bekeris, V.
author2_role	author author author author author author author author author
dc.subject.none.fl_str_mv	Aqueous suspensions Calculated values Kanamycins Magnetic energies Magnetic field gradient Magnetic force Magnetic nanoparticles Magneto-optic imaging Magnetotactic Bacteria Stray magnetic fields Superparamagnetics Tape surfaces Bacteria Magnetic amplifiers Magnetic fields Nanoparticles Optical microscopy Superparamagnetism Suspensions (fluids) Synthesis (chemical) Suspensions (components)
topic	Aqueous suspensions Calculated values Kanamycins Magnetic energies Magnetic field gradient Magnetic force Magnetic nanoparticles Magneto-optic imaging Magnetotactic Bacteria Stray magnetic fields Superparamagnetics Tape surfaces Bacteria Magnetic amplifiers Magnetic fields Nanoparticles Optical microscopy Superparamagnetism Suspensions (fluids) Synthesis (chemical) Suspensions (components)
dc.description.none.fl_txt_mv	We report micrometric periodic assembly of live and dead magnetotactic bacteria, Magnetospirillum magneticum AMB-1, which synthesize chains of magnetic nanoparticles inside their bodies, and of superparamagnetic Fe 3 O 4 and ferromagnetic CoFe 2 O 4 nanoparticles in aqueous suspensions using periodically magnetized audio tapes. The distribution of the stray magnetic field at the surface of the tapes was determined analytically and experimentally by magneto-optic imaging. Calculations showed that the magnetic field close to the tape surface was of the order of 100 mT, and the magnetic field gradient was larger than 1 T mm -1 . Drops of aqueous solutions were deposited on the tapes, and bacteria and particles were trapped at locations where magnetic energy is minimized, as observed using conventional optical microscopy. Suspensions of M. magneticum AMB-1 treated with formaldehyde and kanamycin were studied, and patterns of trapped dead bacteria indicated that magnetic forces dominate over self-propelling forces in these experiments, in accordance with calculated values. The behavior of the different types of samples is discussed. © 2012 American Institute of Physics. Fil:Jorge, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferrari, H.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Antonel, P.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ruiz, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Negri, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pettinari, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bekeris, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description	We report micrometric periodic assembly of live and dead magnetotactic bacteria, Magnetospirillum magneticum AMB-1, which synthesize chains of magnetic nanoparticles inside their bodies, and of superparamagnetic Fe 3 O 4 and ferromagnetic CoFe 2 O 4 nanoparticles in aqueous suspensions using periodically magnetized audio tapes. The distribution of the stray magnetic field at the surface of the tapes was determined analytically and experimentally by magneto-optic imaging. Calculations showed that the magnetic field close to the tape surface was of the order of 100 mT, and the magnetic field gradient was larger than 1 T mm -1 . Drops of aqueous solutions were deposited on the tapes, and bacteria and particles were trapped at locations where magnetic energy is minimized, as observed using conventional optical microscopy. Suspensions of M. magneticum AMB-1 treated with formaldehyde and kanamycin were studied, and patterns of trapped dead bacteria indicated that magnetic forces dominate over self-propelling forces in these experiments, in accordance with calculated values. The behavior of the different types of samples is discussed. © 2012 American Institute of Physics.
publishDate	2012
dc.date.none.fl_str_mv	2012
dc.type.none.fl_str_mv	info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/20.500.12110/paper_00218979_v111_n4_p_Godoy
url	http://hdl.handle.net/20.500.12110/paper_00218979_v111_n4_p_Godoy
dc.language.none.fl_str_mv	eng
language	eng
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv	openAccess
rights_invalid_str_mv	http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv	application/pdf
dc.source.none.fl_str_mv	J Appl Phys 2012;111(4) reponame:Biblioteca Digital (UBA-FCEN) instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales instacron:UBA-FCEN
reponame_str	Biblioteca Digital (UBA-FCEN)
collection	Biblioteca Digital (UBA-FCEN)
instname_str	Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str	UBA-FCEN
institution	UBA-FCEN
repository.name.fl_str_mv	Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv	ana@bl.fcen.uba.ar
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Micrometric periodic assembly of magnetotactic bacteria and magnetic nanoparticles using audio tapes

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