Labsystems Oy

Nanoform Finland Oy

Helsingin Yliopisto

Nanoform Finland Oyj

Kai Falck

Edward Haeggström

Ari Salmi

Heikki Juhani Nieminen

Jouko Yliruusi

Timo Rauhala

Ilkka Lassila

Heikki Räikkönen

Jenni Pessi

Antti Meriläinen

Tor Paulin

Jyrki Heinämäki

Ivo Laidmäe

Heikki Raikkonen

Antti Merilainen

The invention relates to a method and a device for producing nanoparticles of organic substances, in particular by controlled expansion of pressurized solutions. The method comprises: admixing the organic substance and a supercritical fluid to form a mixture at a first pressure; decreasing the first pressure gradually to a second pressure so that a flow of the mixture is formed and nucleation of the organic substance in the mixture is initiated; and, decreasing the second pressure to a third pressure, so that solidification of the fluid of the mixture, comprising the nucleated organic substance, is initiated. The device comprises: a pressure chamber () for a mixture of the organic substance and a supercritical fluid; a collection chamber () for the nanoparticles; an outlet tube () connecting the pressure chamber to the collection chamber (); and, one or more second nozzles (). The outlet tube is provided with a pressure controlling means () configured to control pressure of the mixture within the outlet tube and a first nozzle () configured to allow expansion of the mixture to the collection chamber.

Method and a device for producing nanoparticles

Method for the performance of a mutagenicity test

Growing community of inventors

Helsinki, Finland

Kai Falck