| Presentation | 2007-10-17 Detection of magnetic nanoparticles by measurement of ac susceptibility Kazuya OHGAMI, Takeshi MUKAIDATE, Shinya KURIKI, Mizushi MATSUDA, Satoru HIRANO, S. Y. Yang, H. E. Horng, H. C. Yang, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | AC-susceptibility of magnetic nanoparticles (Fe_3O_4) was measured by using an induction detection coil having a differential configuration and a dc-SQUID current-detector. For this purpose, a portable SQUID magnetometer that could measure small currents of orders of pA was developed. Super-paramagnetic nanoparticles (particle size 16 nm), which were coated with dextran molecules, were used. An excitation ac field was applied to magnetic nanoparticles, and the current signal detected by the induction coil was transmitted to the SQUID current-detector through an input coil. Finally, the magnetic signal of third-order higher harmonics of the excitation frequency was measured with a spectrum analyzer. As a result, the amount of nanoparticles from 120 to 1800 ng was obtained with a linear input-output relation. The detection sensitivity estimated from the noise level was 60-100 ng. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SQUID / AC-susceptibility / magnetic nanoparticles / Brownian rotation |
| Paper # | SCE2007-18 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2007/10/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Superconductive Electronics (SCE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Detection of magnetic nanoparticles by measurement of ac susceptibility |
| Sub Title (in English) | |
| Keyword(1) | SQUID |
| Keyword(2) | AC-susceptibility |
| Keyword(3) | magnetic nanoparticles |
| Keyword(4) | Brownian rotation |
| 1st Author's Name | Kazuya OHGAMI |
| 1st Author's Affiliation | Research Institute for Electronic Science, Hokkaido University() |
| 2nd Author's Name | Takeshi MUKAIDATE |
| 2nd Author's Affiliation | Research Institute for Electronic Science, Hokkaido University |
| 3rd Author's Name | Shinya KURIKI |
| 3rd Author's Affiliation | Research Institute for Electronic Science, Hokkaido University |
| 4th Author's Name | Mizushi MATSUDA |
| 4th Author's Affiliation | Muroran Institute of Technology |
| 5th Author's Name | Satoru HIRANO |
| 5th Author's Affiliation | Yamagata University |
| 6th Author's Name | S. Y. Yang |
| 6th Author's Affiliation | National Taiwan Normal University |
| 7th Author's Name | H. E. Horng |
| 7th Author's Affiliation | National Taiwan Normal University |
| 8th Author's Name | H. C. Yang |
| 8th Author's Affiliation | National Taiwan University |
| Date | 2007-10-17 |
| Paper # | SCE2007-18 |
| Volume (vol) | vol.107 |
| Number (no) | 259 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |