[15a-PB1-1~16] 9.2 Nanowires and Nanoparticles

[15a-PB1-9] Fabrication of Te Nano-Needles from a Thin Ge₂Sb₂Te₅ Film

〇Masashi Kuwahara¹, Abe Maho³, Toru Tsuruoka², Joe Sakai⁵, Youichi Uehara³, Rie Endo⁴, Hayato Sone⁶, Sumio Hosaka⁶ (1.AIST, 2.NIMS, 3.Tohoku Univ., 4.TIT, 5.Tours Univ., 6.Gunma Univ.)

Keywords:chalcogenide,nano-needles

In this study, we fabricated nano-needles of Te using a simple combination of rf-magnetron sputteringand annealing techniques without catalysis or any complicated procedures. We selected an Sb–Te alloy as a representative chalco-genide material, and highly oriented pyrolytic graphite as the substrate material, expecting that atoms would be mobile on it, and that nanostructures are easily recognized on its atomically flat surface. We have produced Te nano-needles from a thin Ge₂Sb₂Te₅ (GST) film with 1.5 nm thickness. The size and shape were observed by scanning electron microscopy(SEM) and its chemical composition were investigated by an energy dispersive X-ray spectrometry (EDX).