新規な２次元ホウ素ナノシステムの創製とその熱電変換応用

采用前驱体材料，实现了硼基纳米材料（以BN为基材）的毫克级化学气相沉积合成。考虑到热电应用，这种放大是必要的。这种材料本身没有很好的热电性能，但我们已经开始掺杂实验，试图控制电子能带结构，并修改薄膜的厚度，以实现可能的声子约束效应，以增强热电性能。作为这项研究的一个非常有趣的副产品，化学功能化导致在BN纳米结构薄膜中发现了从超亲水性到超疏水性的广泛范围(这一结果发表在“仿生氮化硼纳米结构的界面工程走向可控疏水性/亲水性”，纳米/微工程和分子系统（NEMS）， 2015年IEEE第10届国际会议，p. 90-91（2015）。DOI: 10.1109 / NEMS.2015.7147380)。在对硼基纳米材料进行研究的同时，本研究的一大目标是在二维材料中实现高热电性能的重大突破。作为一种很好的模板材料，我们还推进了二维碲化铋的固态合成，这是50年来室温下的冠军材料。我们已经取得了非常高的热电性能的创纪录水平的ZT，这是一篇论文正在写。

Milligram-level chemical vapor deposition synthesis of boron-based nanomaterials (based on BN) was achieved by using precursor materials. This scale-up is necessary to consider it for thermoelectric applications. This material itself does not have good thermoelectric properties, but we have started doping experiments to try to control the electronic band structure and also modify the thickness of films to achieve possible phonon confinement effects in order to enhance the thermoelectric properties. As a very interesting by-product of this research, chemical functionalization led to discovery of a wide range from superhydrophilicity to superhydrophobicity in the BN nanostructure films (this result was published as “Interface engineering of bio-inspired Boron nitride nano-architectures toward controllable hydrophobicity/hydrophilicity”, Nano/Micro Engineered and Molecular Systems (NEMS), 2015 IEEE 10th International Conference, p. 90-91 (2015). DOI: 10.1109/NEMS.2015.7147380).While the boron-based nanomaterial research was proceeding, at the same time, one of the large goals of this research is to achieve dramatic breakthroughs of high thermoelectric performance in 2 dimensional materials. As a good template material, we also moved forward the solid-state synthesis of 2 dimensional bismuth telluride, which for 50 years has been the champion material at room temperature. We have achieved very high thermoelectric performance of record-level ZT of which a paper is being written.