Synthesis of $\beta$-$Ga_2$$O_3 Nanobelts and Nanoparticles from Mechanically Ground GaN Powders with Different Thermal Annealing Atmospheres

기계적으로 연마한 GaN 분말로부터 열처리 분위기를 달리한 $\beta$-$Ga_2$$O_3 나노벨트 및 나노입자의 합성

  • 김병철 (고려대학교 전기공학과) ;
  • 선규태 (고려대학교 전기공학과) ;
  • 박광수 (고려대학교 전기공학과) ;
  • 임기주 (고려대학교 전기공학과) ;
  • 노태용 (고려대학교 전기공학과) ;
  • 남산 (고려대학교 전기공학과) ;
  • 성만영 (고려대학교 전기공학과) ;
  • 김상식 (고려대학교 전기공학과)
  • Published : 2001.12.01

Abstract

$\beta$-Ga$_2$O$_3$ nanobelts and nanoparticles were synthesized from mechanically ground GaN powders with thermal annealing in a nitrogen atmosphere and an oxygen atmosphere, respectively. The study of field emission scanning electron microscopy (FESEM) on the microstructures of nanomaterials revealed that the nanobelts synthesized in the nitrogen atmosphere are with the range of 20~1000nm width and 10 ~100nm thickness, and that nanomaterials are nanoparticles with 20~50nm radius obtained by thermal annealing in an oxygen atmosphere. The crystal structure of the $\beta$-Ga$_2$O$_3$ nanobelts and nanoparticles was in this study investigated by X-ray diffractometer (XRD) and high-resolution transmission electron microscope (HRTEM). The formation processes of the nanobelts and nanoparticles will be discussed in this paper.

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