Damage-free top-down processes for fabricating two-dimensional arrays of 7nm GaAs nanodiscs using bio-templates and neutral beam etching

Xuan Yu Wang, Chi Hsien Huang, Rikako Tsukamoto, Pierre Andre Mortemousque, Kohei M. Itoh, Yuzo Ohno, Seiji Samukawa

研究成果: Article査読

16 被引用数 (Scopus)

抄録

The first damage-free top-down fabrication processes for a two-dimensional array of 7nm GaAs nanodiscs was developed by using ferritin (a protein which includes a 7nm diameter iron core) bio-templates and neutral beam etching. The photoluminescence of GaAs etched with a neutral beam clearly revealed that the processes could accomplish defect-free etching for GaAs. In the bio-template process, to remove the ferritin protein shell without thermal damage to the GaAs, we firstly developed an oxygen-radical treatment method with a low temperature of 280 °C. Then, the neutral beam etched the defect-free nanodisc structure of the GaAs using the iron core as an etching mask. As a result, a two-dimensional array of GaAs quantum dots with a diameter of ∼ 7nm, a height of ∼ 10nm, a high taper angle of 88° and a quantum dot density of more than 7 × 1011cm- 2 was successfully fabricated without causing any damage to the GaAs.

本文言語English
論文番号365301
ジャーナルNanotechnology
22
36
DOI
出版ステータスPublished - 2011 9月 7

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 化学一般
  • 材料科学一般
  • 材料力学
  • 機械工学
  • 電子工学および電気工学

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