One-dimensional van der Waals heterostructures: Growth mechanism and handedness correlation revealed by nondestructive TEM

• DOI: 10.1073/pnas.2107295118
• Publication Date: 2021-09-14T18:00:17Z
• Authors: Yongjia Zheng; Akihito Kumamoto; Kaoru Hisama; Keigo Otsuka; Grace Wickerson; Yuta Sato; Ming Liu; Taiki Inoue; Shohei Chiashi; Dai-Ming Tang; Qiang Zhang; Anton Anisimov; Esko I. Kauppinen; Yan Li; Kazu Suenaga; Yuichi Ikuhara; Shigeo Maruyama; Rong Xiang
• Keywords: Molybdenum disulfide

Significance We recently synthesized coaxially nested one-dimensional van der Waals heterostructures in which boron nitride nanotubes or molybdenum disulfide grew seamlessly on a single-walled carbon nanotube template. In this work, edge structures, nucleation sites, and crystal epitaxial relationships heteronanotubes are unambiguously revealed by nondestructive transmission electron microscopic technique. These understandings, together with the characterization technique developed here, can help to optimize synthesis process. Structure-controlled may, ultimately, be used build nanoscale devices such as gate-all-around transistors.