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Nano-structure formation and function control of colloidal materials due to strong magnetic fields

强磁场作用下胶体材料纳米结构的形成和功能控制

基本信息

批准号：
15085205
负责人：
OZEKI Sumio
金额：
$ 24.96万
依托单位：
Shinshu University
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 2005
项目状态：
已结题

项目摘要

Colloid-dimensional assemblies comprising weak magnetic systems, such as hydrogels, lipid vesicles, coacervates, triblockpolymer/silicate hybrids, mesoporous silicas, and organometal complex, were organized and functionalized by magnetic fields. Potential ability of magnetic fields were investigated from the viewpoint of magnetically responsive structures in porous solids and biological materials.Self-organization of various structures due to magnetic fields and magnetic-field sensitization of functions due to additives with magnetic anisotropy were examined. This preliminary success led to a new, simple method to control anisotropic nono-textures and nano-structures based on their magnetism. For examples, two kinds of new cupper-pyrazine complexes were prepared from the same reactants solution and conditions, besides using magnetic fields. This results in magnetic anisotropy originated from crystal structure. Moreover, concentration fluctuation in liquid-liquid mixtures was controlled … More under magnetic force fields produced by magnetic field gradient, and detected by dynamic and static light scattering. Metal structure formation associated with non-linear chemical reaction was examined under magnetic fields. Volume phase transition gels and vesicles were deformed by external magnetic fields and the magnetic deformation was enhanced by the addition of magneitically anisotropic molecules.The magnetoadsorptivity of H_2 onto various carbons including a single wall carbon nanotube depended markedly on temperature. H_2 vapor was adsorbed much larger than the supercritical gas by magnetic field. In the vapor region, the pressure change Ap depends on T^<-1.4>. On the other hands, in the supercritical region, Δp depends on ( T-Tc)^<-0.09> below 40K and (T-Tc)^<-0.34> in the range 40-303K, suggesting two magnetic states of supercritical states in the micropores. Based on the results, new tunneling reaction systems were constructed using adsorption systems comprising hydrogen and carbons, and the tunneling reactions were controlled by magnetic fields.Whether or not there is so-called magnetized water was examind. Very elaborate investigation showed that pure water was not "magnetized", but the water exposed to oxygen was "magnetized" by magnetic treatment. The degree of "magnetization" of water can be quantitatively and easily evaluated by the contact angle. Less

弱磁性体系，如水凝胶、脂泡、凝聚体、三嵌段聚合物/硅酸盐杂化体系、介孔二氧化硅和有机金属络合物，在磁场的作用下被组织和功能化。从多孔性固体和生物材料中磁响应结构的角度研究了磁场的潜在能力，考察了由于磁场引起的各种结构的自组织以及由于具有磁各向异性的添加剂而引起的功能的磁场敏化。这一初步的成功导致了一种新的、简单的方法来控制各向异性非纳米织构和纳米结构，基于它们的磁性。例如，在相同的反应物溶液和条件下，除利用磁场外，还合成了两种新的铜-吡嗪络合物。这导致了磁各向异性源于晶体结构。此外，…控制了液-液混合物中的浓度波动。多在磁场作用下产生磁场梯度，并通过动态光散射和静态光散射检测。在磁场作用下研究了与非线性化学反应有关的金属结构的形成。体积相变凝胶和囊泡在外加磁场的作用下发生形变，磁各向异性分子的加入增强了磁形变。不同的碳材料包括单壁碳纳米管对H_2的磁吸附性明显依赖于温度。磁场对H_2蒸气的吸附远大于对超临界气体的吸附。在蒸汽区，压力变化Ap依赖于T^&lt；-1.4&gt；。另一方面，在超临界区，Δp在40K以下依赖于(T-TC)-0.09&gt；，在40-303K范围内依赖于(T-TC)-0.34&gt；，这表明微孔中存在两种超临界状态的磁态。在此基础上，利用氢和碳组成的吸附体系构建了新的隧穿反应体系，并利用磁场控制隧穿反应，考察了是否存在所谓的磁化水。非常细致的研究表明，纯净水并没有被磁化，但暴露在氧气中的水通过磁处理而被磁化。水的“磁化”程度可以通过接触角来定量和容易地评估。较少