Chemical Design of DyPrFeCoB-Alloy-Based Microtweezers
Using selective dissolution, we create α-Fe/DyPrFeCoB microwires with a parabolic tip for focusing the magnetic flux and enhancing the magnetic attraction of particles. The conditions for sharpening the end of the microwire by etching with HNO 3 and with mixtures of HNO 3 + HCl and H 2 SO 4 + HNO 3...
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| Veröffentlicht in: | Surface investigation, x-ray, synchrotron and neutron techniques x-ray, synchrotron and neutron techniques, 2021-03, Vol.15 (2), p.292-297 |
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| creator | Koplak, O. V. Dvoretskaya, E. V. Sidorov, V. L. Dremova, N. N. Shashkov, I. V. Korolev, D. V. Valeev, R. A. Piskorski, V. P. Morgunov, R. B. |
| description | Using selective dissolution, we create α-Fe/DyPrFeCoB microwires with a parabolic tip for focusing the magnetic flux and enhancing the magnetic attraction of particles. The conditions for sharpening the end of the microwire by etching with HNO
3
and with mixtures of HNO
3
+ HCl and H
2
SO
4
+ HNO
3
are also optimized. The magnetic force of a single microwire with a pointed end (up to 880 pN) makes it possible to capture and hold a DyPrFeCoB microparticle with a size of 1 µm in the region of ~5 µm. A significant magnetic-field gradient (up to ~3.5 × 10
5
T/m), created at the tip of the microwire, is sufficient to affect biological processes inside cells even without magnetic markers. The conditions for the attachment/detachment of a magnetic microparticle are controlled by the exchange bias arising at the interface between the α-Fe ferromagnetic core and the PrDyFeCoB ferrimagnetic shell and by four magnetic states of the microwire, which are switched by a weak external uniform magnetic field of ~0.1–2 kA/m. |
| doi_str_mv | 10.1134/S1027451021020063 |
| format | Article |
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3
and with mixtures of HNO
3
+ HCl and H
2
SO
4
+ HNO
3
are also optimized. The magnetic force of a single microwire with a pointed end (up to 880 pN) makes it possible to capture and hold a DyPrFeCoB microparticle with a size of 1 µm in the region of ~5 µm. A significant magnetic-field gradient (up to ~3.5 × 10
5
T/m), created at the tip of the microwire, is sufficient to affect biological processes inside cells even without magnetic markers. The conditions for the attachment/detachment of a magnetic microparticle are controlled by the exchange bias arising at the interface between the α-Fe ferromagnetic core and the PrDyFeCoB ferrimagnetic shell and by four magnetic states of the microwire, which are switched by a weak external uniform magnetic field of ~0.1–2 kA/m.</description><identifier>ISSN: 1027-4510</identifier><identifier>EISSN: 1819-7094</identifier><identifier>DOI: 10.1134/S1027451021020063</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Biological activity ; Chemistry and Materials Science ; Ferromagnetism ; Magnetic fields ; Magnetic flux ; Magnetism ; Materials Science ; Microparticles ; Sharpening ; Sulfuric acid ; Surfaces and Interfaces ; Thin Films</subject><ispartof>Surface investigation, x-ray, synchrotron and neutron techniques, 2021-03, Vol.15 (2), p.292-297</ispartof><rights>Pleiades Publishing, Ltd. 2021. ISSN 1027-4510, Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques, 2021, Vol. 15, No. 2, pp. 292–297. © Pleiades Publishing, Ltd., 2021. Russian Text © The Author(s), 2021, published in Poverkhnost’, 2021, No. 3, pp. 94–100.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c268t-1025fa8a5fd749d6787de2820aa473be9a660e77fe019c94023eec5d42017d583</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S1027451021020063$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S1027451021020063$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Koplak, O. V.</creatorcontrib><creatorcontrib>Dvoretskaya, E. V.</creatorcontrib><creatorcontrib>Sidorov, V. L.</creatorcontrib><creatorcontrib>Dremova, N. N.</creatorcontrib><creatorcontrib>Shashkov, I. V.</creatorcontrib><creatorcontrib>Korolev, D. V.</creatorcontrib><creatorcontrib>Valeev, R. A.</creatorcontrib><creatorcontrib>Piskorski, V. P.</creatorcontrib><creatorcontrib>Morgunov, R. B.</creatorcontrib><title>Chemical Design of DyPrFeCoB-Alloy-Based Microtweezers</title><title>Surface investigation, x-ray, synchrotron and neutron techniques</title><addtitle>J. Synch. Investig</addtitle><description>Using selective dissolution, we create α-Fe/DyPrFeCoB microwires with a parabolic tip for focusing the magnetic flux and enhancing the magnetic attraction of particles. The conditions for sharpening the end of the microwire by etching with HNO
3
and with mixtures of HNO
3
+ HCl and H
2
SO
4
+ HNO
3
are also optimized. The magnetic force of a single microwire with a pointed end (up to 880 pN) makes it possible to capture and hold a DyPrFeCoB microparticle with a size of 1 µm in the region of ~5 µm. A significant magnetic-field gradient (up to ~3.5 × 10
5
T/m), created at the tip of the microwire, is sufficient to affect biological processes inside cells even without magnetic markers. The conditions for the attachment/detachment of a magnetic microparticle are controlled by the exchange bias arising at the interface between the α-Fe ferromagnetic core and the PrDyFeCoB ferrimagnetic shell and by four magnetic states of the microwire, which are switched by a weak external uniform magnetic field of ~0.1–2 kA/m.</description><subject>Biological activity</subject><subject>Chemistry and Materials Science</subject><subject>Ferromagnetism</subject><subject>Magnetic fields</subject><subject>Magnetic flux</subject><subject>Magnetism</subject><subject>Materials Science</subject><subject>Microparticles</subject><subject>Sharpening</subject><subject>Sulfuric acid</subject><subject>Surfaces and Interfaces</subject><subject>Thin Films</subject><issn>1027-4510</issn><issn>1819-7094</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1UEtLw0AQXkTBWv0B3gKeV2c2-zy2qVVBUVDPYU0mNSVt6m6L1F_vlgoeRBhmBr7XMIydI1wi5vLqGUEYqVJPBaDzAzZAi44bcPIw7QnmO_yYncQ4B1AmV3rAdPFOi7byXTah2M6WWd9kk-1TmFLRj_mo6_otH_tIdfbQVqFffxJ9UYin7KjxXaSznzlkr9Prl-KW3z_e3BWje14Jbdc8parGW6-a2khXa2NNTcIK8F6a_I2c1xrImIYAXeUkiJyoUrUUgKZWNh-yi73vKvQfG4rrct5vwjJFlkKhFhqtw8TCPStdGGOgplyFduHDtkQod-8p_7wnacReExN3OaPw6_y_6Bs842Py</recordid><startdate>20210301</startdate><enddate>20210301</enddate><creator>Koplak, O. V.</creator><creator>Dvoretskaya, E. V.</creator><creator>Sidorov, V. L.</creator><creator>Dremova, N. N.</creator><creator>Shashkov, I. V.</creator><creator>Korolev, D. V.</creator><creator>Valeev, R. A.</creator><creator>Piskorski, V. P.</creator><creator>Morgunov, R. B.</creator><general>Pleiades Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20210301</creationdate><title>Chemical Design of DyPrFeCoB-Alloy-Based Microtweezers</title><author>Koplak, O. V. ; Dvoretskaya, E. V. ; Sidorov, V. L. ; Dremova, N. N. ; Shashkov, I. V. ; Korolev, D. V. ; Valeev, R. A. ; Piskorski, V. P. ; Morgunov, R. B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c268t-1025fa8a5fd749d6787de2820aa473be9a660e77fe019c94023eec5d42017d583</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Biological activity</topic><topic>Chemistry and Materials Science</topic><topic>Ferromagnetism</topic><topic>Magnetic fields</topic><topic>Magnetic flux</topic><topic>Magnetism</topic><topic>Materials Science</topic><topic>Microparticles</topic><topic>Sharpening</topic><topic>Sulfuric acid</topic><topic>Surfaces and Interfaces</topic><topic>Thin Films</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Koplak, O. V.</creatorcontrib><creatorcontrib>Dvoretskaya, E. V.</creatorcontrib><creatorcontrib>Sidorov, V. L.</creatorcontrib><creatorcontrib>Dremova, N. N.</creatorcontrib><creatorcontrib>Shashkov, I. V.</creatorcontrib><creatorcontrib>Korolev, D. V.</creatorcontrib><creatorcontrib>Valeev, R. A.</creatorcontrib><creatorcontrib>Piskorski, V. P.</creatorcontrib><creatorcontrib>Morgunov, R. B.</creatorcontrib><collection>CrossRef</collection><jtitle>Surface investigation, x-ray, synchrotron and neutron techniques</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Koplak, O. V.</au><au>Dvoretskaya, E. V.</au><au>Sidorov, V. L.</au><au>Dremova, N. N.</au><au>Shashkov, I. V.</au><au>Korolev, D. V.</au><au>Valeev, R. A.</au><au>Piskorski, V. P.</au><au>Morgunov, R. B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Chemical Design of DyPrFeCoB-Alloy-Based Microtweezers</atitle><jtitle>Surface investigation, x-ray, synchrotron and neutron techniques</jtitle><stitle>J. Synch. Investig</stitle><date>2021-03-01</date><risdate>2021</risdate><volume>15</volume><issue>2</issue><spage>292</spage><epage>297</epage><pages>292-297</pages><issn>1027-4510</issn><eissn>1819-7094</eissn><abstract>Using selective dissolution, we create α-Fe/DyPrFeCoB microwires with a parabolic tip for focusing the magnetic flux and enhancing the magnetic attraction of particles. The conditions for sharpening the end of the microwire by etching with HNO
3
and with mixtures of HNO
3
+ HCl and H
2
SO
4
+ HNO
3
are also optimized. The magnetic force of a single microwire with a pointed end (up to 880 pN) makes it possible to capture and hold a DyPrFeCoB microparticle with a size of 1 µm in the region of ~5 µm. A significant magnetic-field gradient (up to ~3.5 × 10
5
T/m), created at the tip of the microwire, is sufficient to affect biological processes inside cells even without magnetic markers. The conditions for the attachment/detachment of a magnetic microparticle are controlled by the exchange bias arising at the interface between the α-Fe ferromagnetic core and the PrDyFeCoB ferrimagnetic shell and by four magnetic states of the microwire, which are switched by a weak external uniform magnetic field of ~0.1–2 kA/m.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S1027451021020063</doi><tpages>6</tpages></addata></record> |
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| source | SpringerNature Journals |
| subjects | Biological activity Chemistry and Materials Science Ferromagnetism Magnetic fields Magnetic flux Magnetism Materials Science Microparticles Sharpening Sulfuric acid Surfaces and Interfaces Thin Films |
| title | Chemical Design of DyPrFeCoB-Alloy-Based Microtweezers |
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