Hwang Da Young, Choi Kyoung Hwan, Park Jeong Eon, Suh Dong Hack
Division of Chemical Engineering, College of Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
Phys Chem Chem Phys. 2017 Feb 1;19(5):4048-4055. doi: 10.1039/c6cp08353f.
Controlling tunable properties by rolling up two dimensional nanomaterials is an exciting avenue for tailoring the electronic and magnetic properties of materials at the nanoscale. We demonstrate the tailoring of a magnetic nanocomposite through hybridization with magnetic nanomaterials using hexagonal boron nitride (h-BN) templates as an effective way to evolve magnetism for the first time. Boron nitride nanosheets exhibited their typical diamagnetism, but rolled-up boron nitride sheets (called nanoscrolls) clearly have para-magnetism in the case of magnetic susceptibility. Additionally, the FeO NP sample shows a maximum ZFC curve at about 103 K, which indicates well dispersed superparamagnetic nanoparticles. The ZFC curve for the h-BN-FeO NP scrolls exhibited an apparent rounded maximum blocking temperature at 192 K compared to the FeO NPs, leading to a dramatic increase in T. These magnetic nanoscroll derivatives are remarkable materials and should be suitable for high-performance composites and nano-, medical- and electromechanical-devices.
通过卷绕二维纳米材料来控制可调谐特性是在纳米尺度上定制材料电子和磁性能的一条令人兴奋的途径。我们首次证明，使用六方氮化硼（h-BN）模板与磁性纳米材料杂交来定制磁性纳米复合材料，是一种有效调控磁性的方法。氮化硼纳米片表现出典型的抗磁性，但卷绕的氮化硼片（称为纳米卷）在磁化率方面明显具有顺磁性。此外，FeO NP样品在约103 K处显示出最大的零场冷却（ZFC）曲线，这表明超顺磁性纳米颗粒分散良好。与FeO NPs相比，h-BN-FeO NP纳米卷的ZFC曲线在192 K处呈现出明显的圆形最大阻塞温度，导致阻塞温度显著升高。这些磁性纳米卷衍生物是卓越的材料，应适用于高性能复合材料以及纳米、医疗和机电设备。
