Presentation Information

5:30 PM - 5:45 PM JST(8:30 AM - 8:45 AM UTC)

[7p-N302-16]Structural Changes in Segregated Germanene by Hydrogenation

〇Seiya Suzuki¹, Takahiro Ozawa², Hirokazu Ueta¹, Katsuyuki Fukutani^1,2 (1.JAEA, 2.IIS, Univ. of Tokyo)

Keywords:

germanene,hydrogenation,atomic hydrogen

In this study, we investigated the direct hydrogenation of monolayer germanene formed via surface segregation on an Ag(111)/Ge(111) substrate, using atomic hydrogen, and evaluated its stability and structural changes. FT-IR spectroscopy confirmed the formation of Ge–Hn (n = 1–3) bonds, with hydrogenation saturating at an exposure dose of 150 L. LEED measurements revealed a gradual disappearance of diffraction spots corresponding to germanene with increasing hydrogen exposure. Upon annealing, thermal desorption spectroscopy (TDS) detected hydrogen desorption, and LEED patterns corresponding to germanene reappeared. These results clearly indicate that the hydrogenation of germanene proceeds in a reversible manner.

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