2023-07-17 ライス大学
◆この携帯可能で低コストの保存技術は、ナノ製造および材料科学の研究所で普遍的な問題を解決します。VOCは日常生活でよく見られる製品から放出される炭素ベースの分子で、保存された材料の表面に付着することで製造プロセスや研究に影響を及ぼします。
◆容器の内壁に微細な突起と凹凸を持たせることで、VOCを内部に引き寄せ、他の材料が清潔な状態を保つことができます。このアプローチは他の方法よりも効果的であり、VOCの蓄積を最小限に抑えることが実験で示されました。今後はさらなる研究で容器の設計を改善し、性能を最適化する予定です。
＜関連情報＞
- https://news.rice.edu/news/2023/rice-engineers-storage-technology-keeps-nanosurfaces-clean
- https://pubs.acs.org/doi/10.1021/acs.nanolett.3c00626
ナノ構造を利用した超清浄ストレージで汚染を軽減する Mitigating Contamination with Nanostructure-Enabled Ultraclean Storage
Zhen Liu, Te Faye Yap, Anoop Rajappan, Rachel A. Shveda, Rawand M. Rasheed, and Daniel J. Preston
Nano Letters Published:July 11, 2023
DOI:https://doi.org/10.1021/acs.nanolett.3c00626
Abstract
Airborne hydrocarbon contamination hinders nanomanufacturing, limits characterization techniques, and generates controversies regarding fundamental studies of advanced materials; consequently, we urgently need effective and scalable clean storage techniques. In this work, we propose an approach to clean storage using an ultraclean nanotextured storage medium as a getter. Experiments show that our proposed approach can maintain surface cleanliness for more than 1 week and can even passively clean initially contaminated samples during storage. We theoretically analyzed the contaminant adsorption–desorption process with different values of storage medium surface roughness, and our model predictions showed good agreement with experiments for smooth, nanotextured, and hierarchically textured surfaces, providing guidelines for the design of future clean storage systems. The proposed strategy offers a promising approach for portable and cost-effective storage systems that minimize hydrocarbon contamination in applications requiring clean surfaces, including nanofabrication, device storage and transportation, and advanced metrology.
