Process for producing nanoparticles

A device for producing a nanoparticle comprising an amphiphilic block polymer having a hydrophilic block and a hydrophobic block, the device comprising:

• a polymer solution supply channel configured to form a laminar flow of a polymer solution;
• an aqueous liquid supply channel configured to form a laminar flow of an aqueous liquid;
• a junction joining the polymer solution supply channel and the aqueous liquid supply channel together such that the laminar flow of the polymer solution and the laminar flow of the aqueous liquid are brought into contact with each other;
• a nanoparticle formation channel positioned downstream of the junction such that a nanoparticle comprising the amphiphilic block polymer having a hydrophilic block and a hydrophobic block is formed in the nanoparticle formation channel;
• a nanoparticle-containing liquid outlet positioned on a downstream end of the nanoparticle formation channel such that a nanoparticle-containing liquid comprising the nanoparticle is discharged from the nanoparticle-containing liquid outlet;
• a particle size measurement device configured to measure a particle diameter of the nanoparticle contained in the nanoparticle-containing liquid discharged from the nanoparticle-containing liquid outlet such that a statistic for the particle diameter of the nanoparticle is obtained in real time;
• and
• circuitry configured to control at least one of an amount of the polymer solution supplied to the junction and an amount of the aqueous liquid supplied to the junction based on the statistic of the particle diameter measured by the particle size measurement device such that a value of the statistic is adjusted to become a value of a desired particle diameter of the nanoparticle.