Large-Sized Nanocrystalline Ultrathin β-Ga2 O3 Membranes Fabricated by Surface Charge Lithography

• Large-sized 2D semiconductor materials have gained significant attention for their fascinat-ing properties in various applications. In this work, we demonstrate the fabrication of nanoperforated ultrathin β-Ga2 O3 membranes of a nanoscale thickness. The technological route includes the fabrication of GaN membranes using the Surface Charge Lithography (SCL) approach and subsequent thermal treatment in air at 900◦ C in order to obtain β-Ga2 O3 membranes. The as-grown GaN membranes were discovered to be completely transformed into β-Ga2 O3, with the morphology evolving from a smooth topography to a nanoperforated surface consisting of nanograin structures. The oxidation mechanism of the membrane was investigated under different annealing conditions followed by XPS, AFM, Raman and TEM analyses. 

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

Phase transformation

Surface Charge Lithography

Ultrathin nanomembranes

β-Ga2 O3

Publication and Content Type

ref (subject category)

art (subject category)