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

由弱磁性系统组成的胶体尺寸组件，如水凝胶、脂质囊泡、凝聚层、三嵌段聚合物/硅酸盐杂化物、介孔二氧化硅和有机金属复合物，通过磁场进行组织和功能化，从磁性的角度研究了磁场的潜在能力。多孔固体和生物材料中的响应结构。由于磁场而产生的各种结构的自组织以及由于磁场而产生的功能的磁场敏化对具有磁各向异性的添加剂进行了检查，这一初步成功导致了一种基于磁性控制各向异性非纹理和纳米结构的新方法，例如，从相同的反应物溶液中制备了两种新型铜-吡嗪络合物。除了使用磁场之外，这还导致了源自晶体结构的磁各向异性。此外，液-液混合物中的浓度波动在磁场梯度产生的磁力场下受到控制，并通过动态检测。和静态光散射与非线性化学反应相关的金属结构的形成被检查在外部磁场作用下体积相变凝胶和囊泡的变形，并且通过添加磁各向异性分子增强了磁变形。 H_2 到各种碳（包括单壁碳纳米管）上的吸附量明显依赖于温度，在蒸气区域中，H_2 蒸气的吸附量比超临界气体大得多。压力变化Ap取决于T^<-1.4>，另一方面，在超临界区域，Δp取决于40K以下的(T-Tc)^<-0.09>和(T-Tc)^<-0.34>。范围为40-303K，表明微孔中存在两种超临界状态的磁态，基于该结果，利用包含氢和碳的吸附体系构建了新的隧道反应体系，并进行了隧道反应。是否存在所谓的磁化水进行了非常细致的调查，结果表明纯水没有被“磁化”，但接触氧气的水却通过磁化处理而“磁化”了。通过接触角可以轻松定量地评估水的含量。更少