2023-03-22 ロイヤルメルボルン工科大学(RMIT)
このナノ材料は、柔軟性のある基板にスプレーすることができるため、プラスチックなどの曲げやすい素材にも適用できる。このナノ材料は、タッチスクリーンディスプレイを作るために必要な、可視光線に対して高い透明度と電気伝導性を持っている。また、太陽電池やLEDの電子部品、紫外線を検知するセンサーなど、幅広い分野で活用される可能性がある。
＜関連情報＞
- https://www.rmit.edu.au/news/all-news/2023/mar/spray-on-electronics
- https://pubs.acs.org/doi/full/10.1021/acs.chemrev.2c00456
酸化亜鉛ナノ結晶へのコロイド的アプローチ Colloidal Approaches to Zinc Oxide Nanocrystals
Joel van Embden,Silvia Gross, Kevin R. Kittilstved, and Enrico Della Gaspera
Chemical Reviews Published:December 23, 2022
DOI:https://doi.org/10.1021/acs.chemrev.2c00456
Abstract
Zinc oxide is an extensively studied semiconductor with a wide band gap in the near-UV. Its many interesting properties have found use in optics, electronics, catalysis, sensing, as well as biomedicine and microbiology. In the nanoscale regime the functional properties of ZnO can be precisely tuned by manipulating its size, shape, chemical composition (doping), and surface states. In this review, we focus on the colloidal synthesis of ZnO nanocrystals (NCs) and provide a critical analysis of the synthetic methods currently available for preparing ZnO colloids. First, we outline key thermodynamic considerations for the nucleation and growth of colloidal nanoparticles, including an analysis of different reaction methodologies and of the role of dopant ions on nanoparticle formation. We then comprehensively review and discuss the literature on ZnO NC systems, including reactions in polar solvents that traditionally occur at low temperatures upon addition of a base, and high temperature reactions in organic, nonpolar solvents. A specific section is dedicated to doped NCs, highlighting both synthetic aspects and structure–property relationships. The versatility of these methods to achieve morphological and compositional control in ZnO is explicated. We then showcase some of the key applications of ZnO NCs, both as suspended colloids and as deposited coatings on supporting substrates. Finally, a critical analysis of the current state of the art for ZnO colloidal NCs is presented along with existing challenges and future directions for the field.
