1H relaxation enhancement induced by nanoparticles in solutions: influence of magnetic properties and diffusion
Magnetic nanoparticles that induce nuclear relaxation are the most promising materials to enhance the sensitivity in Magnetic Resonance Imaging. In order to provide a comprehensive understanding of the magnetic field dependence of the relaxation enhancement in solutions, Nuclear Magnetic Resonance (...
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| Veröffentlicht in: | The Journal of chemical physics 2014-05, Vol.140 (17), p.174504-174504 |
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| container_title | The Journal of chemical physics |
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| creator | Kruk, D Korpała, A Taheri, S Mehdizadeh Kozłowski, A Förster, S Rössler, E A |
| description | Magnetic nanoparticles that induce nuclear relaxation are the most promising materials to enhance the sensitivity in Magnetic Resonance Imaging. In order to provide a comprehensive understanding of the magnetic field dependence of the relaxation enhancement in solutions, Nuclear Magnetic Resonance (1)H spin-lattice relaxation for decalin and toluene solutions of various Fe2O3 nanoparticles was investigated. The relaxation experiments were performed in a frequency range of 10 kHz-20 MHz by applying Field Cycling method, and in the temperature range of 257-298 K, using nanoparticles differing in size and shape: spherical--5 nm diameter, cubic--6.5 nm diameter, and cubic--9 nm diameter. The relaxation dispersion data were interpreted in terms of a theory of nuclear relaxation induced by magnetic crystals in solution. The approach was tested with respect to its applicability depending on the magnetic characteristics of the nanocrystals and the time-scale of translational diffusion of the solvent. The role of Curie relaxation and the contributions to the overall (1)H spin-lattice relaxation associated with the electronic spin-lattice and spin-spin relaxation was thoroughly discussed. It was demonstrated that the approach leads to consistent results providing information on the magnetic (electronic) properties of the nanocrystals, i.e., effective electron spin and relaxation times. In addition, features of the (1)H spin-lattice relaxation resulting from the electronic properties of the crystals and the solvent diffusion were explained. |
| doi_str_mv | 10.1063/1.4871461 |
| format | Article |
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In order to provide a comprehensive understanding of the magnetic field dependence of the relaxation enhancement in solutions, Nuclear Magnetic Resonance (1)H spin-lattice relaxation for decalin and toluene solutions of various Fe2O3 nanoparticles was investigated. The relaxation experiments were performed in a frequency range of 10 kHz-20 MHz by applying Field Cycling method, and in the temperature range of 257-298 K, using nanoparticles differing in size and shape: spherical--5 nm diameter, cubic--6.5 nm diameter, and cubic--9 nm diameter. The relaxation dispersion data were interpreted in terms of a theory of nuclear relaxation induced by magnetic crystals in solution. The approach was tested with respect to its applicability depending on the magnetic characteristics of the nanocrystals and the time-scale of translational diffusion of the solvent. The role of Curie relaxation and the contributions to the overall (1)H spin-lattice relaxation associated with the electronic spin-lattice and spin-spin relaxation was thoroughly discussed. It was demonstrated that the approach leads to consistent results providing information on the magnetic (electronic) properties of the nanocrystals, i.e., effective electron spin and relaxation times. In addition, features of the (1)H spin-lattice relaxation resulting from the electronic properties of the crystals and the solvent diffusion were explained.</description><identifier>ISSN: 0021-9606</identifier><identifier>EISSN: 1089-7690</identifier><identifier>DOI: 10.1063/1.4871461</identifier><identifier>PMID: 24811643</identifier><language>eng</language><publisher>United States: American Institute of Physics</publisher><subject>Crystal lattices ; Decalin ; Dependence ; Diffusion ; Electron spin ; Ferric Compounds - chemistry ; Magnetic induction ; Magnetic properties ; Magnetic resonance imaging ; Magnetite Nanoparticles - chemistry ; Nanocrystals ; Nanoparticles ; NMR ; Nuclear magnetic resonance ; Nuclear relaxation ; Physical Phenomena ; Physics ; Protons ; Sensitivity enhancement ; Solutions - chemistry ; Solvents ; Solvents - chemistry ; Spin-lattice relaxation ; Toluene</subject><ispartof>The Journal of chemical physics, 2014-05, Vol.140 (17), p.174504-174504</ispartof><rights>2014 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c1583-f80ae6d6772b1963a3b3cd34fb994e8584affc15ca86ebc31a00322c2fbddd0a3</citedby><cites>FETCH-LOGICAL-c1583-f80ae6d6772b1963a3b3cd34fb994e8584affc15ca86ebc31a00322c2fbddd0a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,778,782,27913,27914</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24811643$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Kruk, D</creatorcontrib><creatorcontrib>Korpała, A</creatorcontrib><creatorcontrib>Taheri, S Mehdizadeh</creatorcontrib><creatorcontrib>Kozłowski, A</creatorcontrib><creatorcontrib>Förster, S</creatorcontrib><creatorcontrib>Rössler, E A</creatorcontrib><title>1H relaxation enhancement induced by nanoparticles in solutions: influence of magnetic properties and diffusion</title><title>The Journal of chemical physics</title><addtitle>J Chem Phys</addtitle><description>Magnetic nanoparticles that induce nuclear relaxation are the most promising materials to enhance the sensitivity in Magnetic Resonance Imaging. In order to provide a comprehensive understanding of the magnetic field dependence of the relaxation enhancement in solutions, Nuclear Magnetic Resonance (1)H spin-lattice relaxation for decalin and toluene solutions of various Fe2O3 nanoparticles was investigated. The relaxation experiments were performed in a frequency range of 10 kHz-20 MHz by applying Field Cycling method, and in the temperature range of 257-298 K, using nanoparticles differing in size and shape: spherical--5 nm diameter, cubic--6.5 nm diameter, and cubic--9 nm diameter. The relaxation dispersion data were interpreted in terms of a theory of nuclear relaxation induced by magnetic crystals in solution. The approach was tested with respect to its applicability depending on the magnetic characteristics of the nanocrystals and the time-scale of translational diffusion of the solvent. The role of Curie relaxation and the contributions to the overall (1)H spin-lattice relaxation associated with the electronic spin-lattice and spin-spin relaxation was thoroughly discussed. It was demonstrated that the approach leads to consistent results providing information on the magnetic (electronic) properties of the nanocrystals, i.e., effective electron spin and relaxation times. In addition, features of the (1)H spin-lattice relaxation resulting from the electronic properties of the crystals and the solvent diffusion were explained.</description><subject>Crystal lattices</subject><subject>Decalin</subject><subject>Dependence</subject><subject>Diffusion</subject><subject>Electron spin</subject><subject>Ferric Compounds - chemistry</subject><subject>Magnetic induction</subject><subject>Magnetic properties</subject><subject>Magnetic resonance imaging</subject><subject>Magnetite Nanoparticles - chemistry</subject><subject>Nanocrystals</subject><subject>Nanoparticles</subject><subject>NMR</subject><subject>Nuclear magnetic resonance</subject><subject>Nuclear relaxation</subject><subject>Physical Phenomena</subject><subject>Physics</subject><subject>Protons</subject><subject>Sensitivity enhancement</subject><subject>Solutions - chemistry</subject><subject>Solvents</subject><subject>Solvents - chemistry</subject><subject>Spin-lattice relaxation</subject><subject>Toluene</subject><issn>0021-9606</issn><issn>1089-7690</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpd0cFqGzEQBmBRUmrH7SEvEAS5tIdNZyRZ2s0thLYuBHppz4tWGiUbdiVn5YX67SNjJ4ecBjHfPwwaxi4QrhG0_I7XqjaoNH5gS4S6qYxu4IwtAQRWjQa9YOc5PwEAGqE-sYVQNaJWcskSbvhEg_1vd32KnOKjjY5GijveRz878rzb82hj2tpp17uBcmnwnIb5EMg35RWGmUqIp8BH-xCpML6d0pZKoHAbPfd9CHMugc_sY7BDpi-numL_fv74e7ep7v_8-n13e185XNeyCjVY0l4bIzpstLSyk85LFbqmUVSva2VDKNTZWlPnJFoAKYQTofPeg5Ur9vU4tyzyPFPetWOfHQ2DjZTm3OJaSAUGJBZ69Y4-pXmKZbtWoDBa67UxRX07KjelnCcK7XbqRzvtW4T2cIUW29MVir08TZy7kfybfP12-QKrr4Ku</recordid><startdate>20140507</startdate><enddate>20140507</enddate><creator>Kruk, D</creator><creator>Korpała, A</creator><creator>Taheri, S Mehdizadeh</creator><creator>Kozłowski, A</creator><creator>Förster, S</creator><creator>Rössler, E A</creator><general>American Institute of Physics</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>20140507</creationdate><title>1H relaxation enhancement induced by nanoparticles in solutions: influence of magnetic properties and diffusion</title><author>Kruk, D ; Korpała, A ; Taheri, S Mehdizadeh ; Kozłowski, A ; Förster, S ; Rössler, E A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1583-f80ae6d6772b1963a3b3cd34fb994e8584affc15ca86ebc31a00322c2fbddd0a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Crystal lattices</topic><topic>Decalin</topic><topic>Dependence</topic><topic>Diffusion</topic><topic>Electron spin</topic><topic>Ferric Compounds - chemistry</topic><topic>Magnetic induction</topic><topic>Magnetic properties</topic><topic>Magnetic resonance imaging</topic><topic>Magnetite Nanoparticles - chemistry</topic><topic>Nanocrystals</topic><topic>Nanoparticles</topic><topic>NMR</topic><topic>Nuclear magnetic resonance</topic><topic>Nuclear relaxation</topic><topic>Physical Phenomena</topic><topic>Physics</topic><topic>Protons</topic><topic>Sensitivity enhancement</topic><topic>Solutions - chemistry</topic><topic>Solvents</topic><topic>Solvents - chemistry</topic><topic>Spin-lattice relaxation</topic><topic>Toluene</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kruk, D</creatorcontrib><creatorcontrib>Korpała, A</creatorcontrib><creatorcontrib>Taheri, S Mehdizadeh</creatorcontrib><creatorcontrib>Kozłowski, A</creatorcontrib><creatorcontrib>Förster, S</creatorcontrib><creatorcontrib>Rössler, E A</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>The Journal of chemical physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kruk, D</au><au>Korpała, A</au><au>Taheri, S Mehdizadeh</au><au>Kozłowski, A</au><au>Förster, S</au><au>Rössler, E A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>1H relaxation enhancement induced by nanoparticles in solutions: influence of magnetic properties and diffusion</atitle><jtitle>The Journal of chemical physics</jtitle><addtitle>J Chem Phys</addtitle><date>2014-05-07</date><risdate>2014</risdate><volume>140</volume><issue>17</issue><spage>174504</spage><epage>174504</epage><pages>174504-174504</pages><issn>0021-9606</issn><eissn>1089-7690</eissn><abstract>Magnetic nanoparticles that induce nuclear relaxation are the most promising materials to enhance the sensitivity in Magnetic Resonance Imaging. In order to provide a comprehensive understanding of the magnetic field dependence of the relaxation enhancement in solutions, Nuclear Magnetic Resonance (1)H spin-lattice relaxation for decalin and toluene solutions of various Fe2O3 nanoparticles was investigated. The relaxation experiments were performed in a frequency range of 10 kHz-20 MHz by applying Field Cycling method, and in the temperature range of 257-298 K, using nanoparticles differing in size and shape: spherical--5 nm diameter, cubic--6.5 nm diameter, and cubic--9 nm diameter. The relaxation dispersion data were interpreted in terms of a theory of nuclear relaxation induced by magnetic crystals in solution. The approach was tested with respect to its applicability depending on the magnetic characteristics of the nanocrystals and the time-scale of translational diffusion of the solvent. The role of Curie relaxation and the contributions to the overall (1)H spin-lattice relaxation associated with the electronic spin-lattice and spin-spin relaxation was thoroughly discussed. It was demonstrated that the approach leads to consistent results providing information on the magnetic (electronic) properties of the nanocrystals, i.e., effective electron spin and relaxation times. In addition, features of the (1)H spin-lattice relaxation resulting from the electronic properties of the crystals and the solvent diffusion were explained.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><pmid>24811643</pmid><doi>10.1063/1.4871461</doi><tpages>1</tpages></addata></record> |
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| subjects | Crystal lattices Decalin Dependence Diffusion Electron spin Ferric Compounds - chemistry Magnetic induction Magnetic properties Magnetic resonance imaging Magnetite Nanoparticles - chemistry Nanocrystals Nanoparticles NMR Nuclear magnetic resonance Nuclear relaxation Physical Phenomena Physics Protons Sensitivity enhancement Solutions - chemistry Solvents Solvents - chemistry Spin-lattice relaxation Toluene |
| title | 1H relaxation enhancement induced by nanoparticles in solutions: influence of magnetic properties and diffusion |
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