A chalcogen film is applied to an acute tip of a glass fiber and the acute tip
is held in physical contact with a metal layer so as to induce diffusional reaction
for generation of a metal chalcogenide nano-particle or nano-particles at the acute
tip. In the case where the chalcogen film is directly applied to the acute tip,
the generated nano-particle or nano-particles are transferred from the acute tip
to a corresponding part of the metal layer. When a silane-adsorbed film is pre-formed
on the acute tip before application of the chalcogen film, the generated nano-particle
or nano-particles are fixed to the acute tip. The nano-particles are several to
tens in number with very narrow distribution of particle size. Since particle size
and fixed position of the nano-particle or nano-particles can be controlled with
high freedom, the nano-particle or nano-particles are useful as a light-emitting
or photo-detecting element.
