Revealing mysteries of the Universe with atomically-thin graphene X-ray filters

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K20920
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 15:Particle-, nuclear-, astro-physics, and related fields
• Research Institution: Nagoya University
• Principal Investigator: Mitsuishi Ikuyuki 名古屋大学, 理学研究科, 講師 (90725863)
• Project Period (FY): 2020-07-30 – 2022-03-31
• Keywords: グラフェン / X 線 / 光学素子 / 飛翔体

Outline of Final Research Achievements

We established development systems capable of in-house production processes and conducted acoustic pressure tolerance tests and transmission measurements. Consequently, we fabricated a free-standing single-layer graphene layer with a diameter of 100 um successfully. Moreover, it is found that the acoustic vibration tolerance with a qualification level of the H-IIA rocket was confirmed for free-standing single-layer graphene films with a diameter of 10 um and very high transmission more than approximately 98% was also confirmed for single-layer free-standing graphene films at an energy range between 100 and 500 eV except a C absorption edge structure.

Free Research Field

X線天文学

Academic Significance and Societal Importance of the Research Achievements

高い機械強度や電磁波・流体・電子などへの高い透過・不透過特性はグラフェンのユニークな物性の一つであり、これらの特長を活かすことができれば様々な組み合わせに対し高いコントラストを可能にする広義の高感度フィルターが実現できる。これが実現できれば飛翔体搭載用素子のみならず、検出器窓やサンプル試料ホルダなど様々な地上装置への実装等が可能となり、宇宙物理学はもちろん、医学・生物学・分析科学分野等への多大な貢献が期待できる。