Abstract: A method of production of a scanning probe microscope probe provided with a sharp head made of a single wall carbon nanotube comprising imparting a catalyst metal to a tip of probe body, then irradiating the catalyzed part of the tip of the probe body by an arc discharge caused between needle shaped carbon electrodes in an inert gas atmosphere in a scanning probe microscope so as to grow a single wall carbon nanotube at the catalyzed part, and a method of inspection and method of use of the same.

Abstract: A method of production of a scanning probe microscope probe provided with a sharp head made of a single wall carbon nanotube comprising imparting a catalyst metal to a tip of probe body, then irradiating the catalyzed part of the tip of the probe body by an arc discharge caused between needle shaped carbon electrodes in an inert gas atmosphere in a scanning probe microscope so as to grow a single wall carbon nanotube at the catalyzed part, and a method of inspection and method of use of the same.

Abstract: An air-fuel ratio feedback control apparatus of an internal combustion engine in which an air-fuel ratio of an air-fuel mixture is at first set on the lean side of the desired air-fuel ratio. Additional fuel is supplied from at least one fuel injection valve. The amount of injected fuel each time the injecting operation is carried out is increased or decreased by a certain quantity in accordance with an air-fuel ratio condition signal detected by an air-fuel ratio sensor. Only when the air-fuel ratio feedback, control operation is initiated, then is a large amount of fuel abruptly supplied to the engine by an auxiliary fuel control means. Thereafter, the normal injecting operation is carried out together with the operation for increasing or decreasing the amount of injected fuel by a certain quantity.