Influence of magnetoplasmonic γ-Fe2O3/Au core/shell nanoparticles on low-field nuclear magnetic resonance
| Autor: | Kuen Lin Chen, Tsung Lin Huang, Yu Jie Hong, Limin Wang, Jian-Ming Chen, Yao Wei Yeh, Chiu Hsien Wu, Zu Yin Deng, Su Hsien Liao |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Multidisciplinary
Materials science Proton Photothermal effect Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Low field nuclear magnetic resonance 01 natural sciences 0104 chemical sciences law.invention Core (optical fiber) SQUID Nuclear magnetic resonance Magnetic core law 0210 nano-technology Plasmon |
| Zdroj: | Scientific Reports. |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/srep35477 |
| Popis: | Magnetoplasmonic nanoparticles, composed of a plasmonic layer and a magnetic core, have been widely shown as promising contrast agents for magnetic resonance imaging (MRI) applications. However, their application in low-field nuclear magnetic resonance (LFNMR) research remains scarce. Here we synthesised γ-Fe2O3/Au core/shell (γ-Fe2O3@Au) nanoparticles and subsequently used them in a homemade, high-Tc, superconducting quantum interference device (SQUID) LFNMR system. Remarkably, we found that both the proton spin–lattice relaxation time (T1) and proton spin–spin relaxation time (T2) were influenced by the presence of γ-Fe2O3@Au nanoparticles. Unlike the spin–spin relaxation rate (1/T2), the spin–lattice relaxation rate (1/T1) was found to be further enhanced upon exposing the γ-Fe2O3@Au nanoparticles to 532 nm light during NMR measurements. We showed that the photothermal effect of the plasmonic gold layer after absorbing light energy was responsible for the observed change in T1. This result reveals a promising method to actively control the contrast of T1 and T2 in low-field (LF) MRI applications. |
| Databáze: | OpenAIRE |
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