Low-Temperature Magnetism of Gold Nano Particles Contained in Electrochemical Sugar Recognition System

Goto T.; Kitamoto Y.; Matsui K.; Kuroe H.; Endo A.; Hashimoto T.; Hayashita T.; Iguchi S.; Sasaki T.

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Low-Temperature Magnetism of Gold Nano Particles Contained in Electrochemical Sugar Recognition System

机译：电化学糖识别系统中所含金纳米粒子的低温磁性

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Low-temperature magnetic properties were investigated on the gold nano particles (GNPs) with an average size of 11.5 nm, assembled with molecules of ruthenium complex (Ru0), and phenylboronic acid (B0) by the proton nuclear magnetic resonance (H-1-NMR) and susceptibility measurements. The temperature dependence of the NMR shift and the uniform susceptibility was described as the sum of the Curie-Weiss term and a positive constant term. From the former, the average number of Ru0 on each GNP was estimated to be 118, which is 23% of the calculation. The finite positive constant term shows a clear contrast with the well-known fact that the bulk gold is diamagnetic. Finally, a disappearance of the motional narrowing effect in the proton NMR spectra below 60 K indicates that the wavering motion of Ru0 complexes on GNP at room temperature is frozen at low temperatures.

机译：通过质子核磁共振（H-1-）研究了平均尺寸为11.5 nm的金纳米粒子（GNP）的低温磁性质，该纳米粒子与钌配合物（Ru0）和苯硼酸（B0）分子组装在一起NMR）和磁化率测量。 NMR位移和均匀磁化率的温度依赖性被描述为居里-魏斯项和正常数项之和。根据前者，每个GNP上Ru0的平均数估计为118，占计算的23％。有限的正常数项与散装金具有抗磁性的众所周知的事实形成鲜明对比。最后，质子核磁共振谱中低于60 K的运动变窄效应消失，表明Ru0络合物在室温下在GNP上的摇摆运动在低温下冻结。

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《IEEE Transactions on Magnetics》 |2019年第2期|1-4|共4页
作者
Goto T.; Kitamoto Y.; Matsui K.; Kuroe H.; Endo A.; Hashimoto T.; Hayashita T.; Iguchi S.; Sasaki T.;
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作者单位

Sophia Univ, Fac Sci & Engn, Tokyo 1028554, Japan;

Sophia Univ, Fac Sci & Engn, Tokyo 1028554, Japan;

Sophia Univ, Fac Sci & Engn, Tokyo 1028554, Japan|Univ Tokyo, Inst Solid State Phys, Tokyo 2778581, Japan;

Sophia Univ, Fac Sci & Engn, Tokyo 1028554, Japan;

Sophia Univ, Fac Sci & Engn, Tokyo 1028554, Japan;

Sophia Univ, Fac Sci & Engn, Tokyo 1028554, Japan;

Sophia Univ, Fac Sci & Engn, Tokyo 1028554, Japan;

Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan;

Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan;

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正文语种 eng
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关键词
Gold nano particles (GNPs); nuclear magnetic resonance (NMR); paramagnetism;

机译：金纳米粒子（GNP）;核磁共振（NMR）;顺磁性;

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机译：使用钌配合物和苯基硼酸组装在金纳米颗粒上的新型电化学糖识别系统
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Low-Temperature Magnetism of Gold Nano Particles Contained in Electrochemical Sugar Recognition System

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