Method for arranging particles and method for manufacturing light-emitting device
A method for arranging particles according to one aspect of the present invention comprises the steps of: forming a thin film on a surface of a substrate, the thin film being obtained by dispersing first particles made of metal in a material, a surface of the material is to be charged to a first polarity in a predetermined solution; dispersing second particles in the solution, the second particles being charged to a second polarity opposite to the first polarity; immersing the thin film in the solution; and irradiating the thin film with light having a wavelength which causes plasmon resonance with surface plasmons of the metal particles.
1. A method for arranging particles comprising:
forming a thin film on a surface of a substrate, the thin film being obtained by dispersing first particles made of metal in a material, and a surface of the material being charged to a first polarity when the material is immersed in a predetermined solution;
dispersing second particles in the predetermined solution, the second particles being charged to a second polarity opposite to the first polarity;
immersing the thin film in the predetermined solution; and
irradiating the thin film immersed in the predetermined solution with light having a wavelength which causes plasmon resonance with surface plasmons of the first particles, thereby regularly arranging the second particles in a monolayer on the thin film, the light being laser interference light and being striped interference pattern of laser light comprising a plurality of parallel laser lines.
2. The method according to claim 1 , wherein a diameter of the second particles is equal to the wavelength of the light.
3. The method according to claim 1 , wherein a diameter of the second particles is smaller than the wavelength of the light.
4. The method according to claim 1 , wherein the first particles are made of silver.
5. The method according to claim 1 , wherein the first particles are made of gold.
6. The method according to claim 1 , wherein a diameter of the first particles is 10 nm or less.
7. The method according to claim 1 , wherein the substrate is a transparent substrate, the thin film being irradiated with the light from a back side of the substrate which is an opposite side of a front side of the substrate, the front side of the substrate being a side of the substrate where the thin film is formed.
8. The method according to claim 1 , wherein the thin film is irradiated with the light from a front side of the substrate where the thin film is formed.
9. The method according to claim 1 , wherein the light is pattern light having an irradiation pattern corresponding to an intended particle arrangement pattern.
10. The method according to claim 1 , wherein the material of the thin film is a polymer which is insoluble in the predetermined solution and which has an ionic modifying group as a terminal group.
11. The method according to claim 10 , wherein the material of the thin film is carboxylic acid.
12. The method according to claim 10 , wherein the material of the thin film is a polymer having an amino group as a terminal group.
13. The method according to claim 1 , further comprising drying the thin film and the substrate.