Charge-induced phase transition in encapsulated HfTe2 nanoribbons

Abstract

Nanotube encapsulation is a powerful technique for coaxing solids into unconventional configurations. By synthesizing materials within the interior confines of hollow nanotubes, lower dimensional morphologies, such as one-dimensional chains or nanoribbons, are favored. We have used carbon nanotube encapsulation to realize ultra-narrow, atomically precise HfTe2 nanoribbons. A local, electron-beam-stimulated transition from the metallic 1T phase to the previously unreported semiconducting 1H phase is observed. We study computationally how charging can drive the phase transition and the stability of the different atomic configurations.

Filled carbon-nanotube heterostructures: from synthesis to application

“…Furthermore, the nanoribbon is twisted rows in the CNTs due to the edge defect. Similar nanoribbon structures were also exhibited in the WS 2 @MWCNT [16] , MnTe 2 @SWCNT [105] , ReS 2 @SWCNT [56] , HfTe 2 @SWCNT [57] , and PtS 2 @SWCNT [Figure 5C] [106] heterostructures. Surprisingly, Nagata et al prepared single MoTe nanowires using CNT as a template and partially oxidized MoTe 2 as a precursor [101] .…”

“…(E) Model illustration of Viol inside a metallic SWCNT, representative AC-HRTEM image of Viol@SWCNT and SEM image of a Viol@SWCNT (Reproduced with permission previously studied examples such as metal oxide [44,101] , carbides [61,84] , and halides [102][103][104] . This section will concentrate on some novel structures and systems, such as transition metal dichalcogenides (TMDs) [18,50,56,57,70,101,[105][106][107][108] and perovskite [53] .…”