Title :
Desorption of Adsorbed Gas Molecule on a Pentagon at a Tip of Carbon Nanotube by Pulse Laser Irradiation
Author :
Waki, Shunsaku ; Hata, Koichi ; Sato, Hideki ; Saito, Yahachi
Author_Institution :
Graduate Sch. of Eng., Mie Univ., Tsu
Abstract :
Six pentagons located at a tip of MWNT and behavior of a single gas molecule on the pentagons can be observed by field emission microscopy (FEM) using multiwall carbon nanotube (MWNT) with clean surface. Pulse laser irradiation is effective method to obtain the clean surface, and desorption of molecule on a pentagon can be artificially and responsively controlled by this method. Adsorption of a gas molecule onto a pentagon brings about a change from a pentagonal ring image to a bright circular spot image with stepwise increase of V emission current, and vice versa. This switching action of emission current corresponding to adsorption and desorption of a single molecule with a good reproducibility makes to expect an application to monomolecular devices
Keywords :
adsorption; carbon nanotubes; desorption; field emission electron microscopy; laser beam effects; C; FEM; V emission current; adsorption; clean surface; desorption; field emission microscopy; monomolecular devices; multiwall carbon nanotube; pentagonal ring image; pulse laser irradiation; single gas molecule; switching action; Carbon nanotubes; Educational technology; Gas lasers; Laser beam cutting; Laser theory; Optical control; Optical pulses; Space vector pulse width modulation; Surface cleaning; Surface emitting lasers;
Conference_Titel :
Vacuum Nanoelectronics Conference, 2006 and the 2006 50th International Field Emission Symposium., IVNC/IFES 2006. Technical Digest. 19th International
Conference_Location :
Guilin
Print_ISBN :
1-4244-0401-0
DOI :
10.1109/IVNC.2006.335459
