Electric field-induced unzipping of hydrogenated carbon nanotubes into graphene nanoribbons

Graphene Nanoribbons from Electrostatic-Force-Controlled Electric Unzipping of Single- and Multi-Walled Carbon Nanotubes

“…Graphene nanoribbon (GNR) is one of the attractive candidates for nanoelectronics, spintronics, and nanoelectromechanical systems. − Up to now, a lot of physical, chemical, and physicochemical methods have been reported availably for producing GNR from layered graphite, suitably prepared graphene, − , and carbon nanotubes (CNTs) with single wall (SWCNT) ,, and multiwalls (MWCNT). − ,− , …”

“…Up to now, several methods including the physical, chemical, and physicochemical processes have been reported availably for unzipping CNTs. For example, the processes include the physical-based electric, ,, plasma etching, − peeling, transition metal, pulse current, laser, and high impact, the chemical-based hydrothermal, electrochemical, electrocatalytic, oxidation, sonochemical breaking, catalytic cutting, etc., ,− ,,,,− ,− and the physicochemical-based layer-by-layer assembly …”

“…In that case, these researchers found that this electric method allows GNRs to be concurrently characterized structurally . Note, some researchers have also simulated the effect of an electric field on the unzipping of CNTs. , According to Xie et al, the width of the GNRs unzipped from MWCNTs is in the range 10–30 nm.…”

“…1−14 Up to now, a lot of physical, chemical, and physicochemical methods have been reported availably for producing GNR from layered graphite, suitably prepared graphene, [1][2][3][4][5]8 and carbon nanotubes (CNTs) with single wall (SWCNT) 18,20,32 and multiwalls (MWCNT). [8][9][10][11][12][13][14][15][16][17][18][19][21][22][23][24][25][26][27][28][29][30][31]33 On the production of GNR from CNTs, it is considered that the CNTs were made as graphene sheets seamlessly rolled into a concentric tube; thus, the unzipping of CNTs has been taken as a promising approach to obtain high-quality GNRs or graphene nanostrips. Up to now, several methods including the physical, chemical, and physicochemical processes have been reported availably for unzipping CNTs.…”

“…Up to now, several methods including the physical, chemical, and physicochemical processes have been reported availably for unzipping CNTs. For example, the processes include the physical-based electric, 14,27,30 plasma etching, 9−12 peeling, 13 transition metal, 15 pulse current, 21 laser, 23 and high impact, 29 the chemical-based hydrothermal, electrochemical, electrocatalytic, oxidation, sonochemical breaking, catalytic cutting, etc., 6,8−12,17,19,22,24−28,31−34 and the physicochemicalbased layer-by-layer assembly. 16 In the chemical oxidation process, the problem of the overoxidation of edges generates defects and a large number of oxygen-containing functionalities have been focused on to lead to the use of an oxidizing agent actually controlling the unzipping process.…”