CAJ | 학술논문

采用射频磁控溅射技术在硅衬底上制备Ga2O3/Nb薄膜,然后在900℃下于流动的氨气中进行氨化制备GaN纳米线.用X射线衍射(XRD)、透射电子显微镜(TEM)和高分辨透射电子显微镜详细分析了GaN纳米线的结构和形貌.结果表明:采用此方法得到的GaN纳米线有直的形态和光滑的表面,其纳米线的直径大约50nm,纳米线的长约几个微米.室温下以325nm波长的光激发样品表面,只显示出一个位于367 nm的很强的紫外发光峰.最后,简单讨论了GaN纳米线的生长机制.
채용사빈자공천사기술재규츤저상제비Ga2O3/Nb박막,연후재900℃하우류동적안기중진행안화제비GaN납미선.용X사선연사(XRD)、투사전자현미경(TEM)화고분변투사전자현미경상세분석료GaN납미선적결구화형모.결과표명:채용차방법득도적GaN납미선유직적형태화광활적표면,기납미선적직경대약50nm,납미선적장약궤개미미.실온하이325nm파장적광격발양품표면,지현시출일개위우367 nm적흔강적자외발광봉.최후,간단토론료GaN납미선적생장궤제.
Single-crystalline GaN nanowires have been synthesized on Si(111) substrates by magnetron sputtering through ammoniating the Ga2O3/Nb films at 900℃ in a quartz tube. The as-prepared nanowires are confirmed as single crystalline GaN with wurtzite structure by X-ray diffraction (XRD), selected-area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM). Transmission electron microscopy (TEM) shows that the GaN nanowires are straight and smooth, and possess the diameters of about 50 nm and lengths up to several microns. When excited by 325 nm helium-cadmium (He-Cd) laser light at room temperature, the GaN nanowires only have a strong ultraviolet luminescence peak located at 367 nm, owing to GaN band-edge emission. Finally, the growth mechanism of GaN nanowires is discussed briefly.