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Organic Inorganic Hybrid-Type Spin-polarized Nanoparticle

有机无机混合型自旋极化纳米粒子

基本信息

批准号：
15087101
负责人：
SUGAWARA Tadashi
金额：
$ 38.46万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

项目摘要

I. Negative magneto-resistance in spin-polarized molecular network connecting gold nano-particles(1) Spin-polarized molecular network composed of spin-polarized wire molecules and gold nanoparticles (d=4 nm) exhibited negative magneto-resistance (4% at 4.2 K, 6 T). (2) A network of a few numbers of nanoparticles was prepared on nano-gap electrodes and it exhibited the I-V characteristic of a Coulomb diamond. (3) Linear type wire molecules, e.g. oligothiophene 21mer (molecular length of 7nm), and three-branched wire molecules were synthesized.II. Coexisting system of conductivity and magnetism in ion radical salt of ETBN (1) Ion radical salt of ETBN exhibited the negative magneto-resistance (-5% at 11K 5T) for the first time as a genuine organic donor radical. (2) Non-linear conductivity was observed in an ion radical salt of the cross-cyclophane-type donor. The mechanism was reveled by X-ray crystal analysis under application of the electric current.III. Magnetic behavior of bio-minerallized nano-magnets in magnetotactic bacteria An assembly of nano-magnetites (d=65nm) bio-minerallized in magnetotactic bacteria exhibited negative magneto-resistance of 5% at 100 K.IV Novel NO-cage compound with high efficiency of photo-decomposition A substituent that induces intersystem-crossing or electron transfer was introduced to N-nitrosoaniline to enhance the quantum yield of photo-decomposition in order to develop versatile NO-cage compounds

一、连接金纳米粒子的自旋极化分子网络中的负磁阻(1)由自旋极化线分子和金纳米粒子(d=4 nm)组成的自旋极化分子网络表现出负磁阻(4% at 4.2 K, 6 T)。 (2)在纳米间隙电极上制备了少量纳米粒子的网络，并表现出库仑金刚石的I-V特性。 (3) 直线型线分子，例如：合成了低聚噻吩21mer（分子长度7nm）和三支线分子。 ETBN离子自由基盐的导电性和磁性共存体系 (1) ETBN离子自由基盐作为真正的有机供体自由基首次表现出负磁阻(-5% at 11K 5T)。 (2)在交叉环芳基供体的离子自由基盐中观察到非线性电导率。通过电流作用下的X射线晶体分析揭示了其机理。趋磁细菌中生物矿化纳米磁体的磁行为趋磁细菌中生物矿化的纳米磁铁矿 (d=65nm) 的组装体在 100 K.IV 下表现出 5% 的负磁阻具有高光分解效率的新型 NO-笼化合物引入了诱导系间交叉或电子转移的取代基 N-亚硝基苯胺可提高光分解的量子产率，以开发多功能的 NO 笼化合物