Thermophoresis measurements in nanoliterdroplets

US9995684B2 · kind B2 · utility

Assignee

• Nanotemper Technologies GMBH · DE

Inventors

• Susanne Seidel · Munich, DE
• Dieter Braun · Spaichingen, DE
• Stefan Duhr · Hersbruck, DE
• Philipp Baaske · Birkenfeld, DE

Key dates

• Filing date: Nov 5, 2014
• Grant date: Jun 12, 2018
• Expiry date: Nov 5, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/06113
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention relates generally to a system and a method for thermo-optical measurements in a droplet of aqueous solution comprising particles of interest, the method comprising the following steps: providing the droplet of aqueous solution with a volume of less than 200 nl, wherein the aqueous solution is a first liquid and at least a part of the particles of interest are fluorescent particles; embedding the droplet of aqueous solution at least partly in a second liquid; irradiating a laser light beam into the droplet to obtain a spatial temperature distribution in the droplet around the irradiated laser light beam; exciting fluorescently said fluorescent particles and detecting fluorescence at least at one position or at around one position in the droplet or detecting the fluorescence distribution of said fluorescently excited particles, wherein said detection of fluorescence is performed at least once at a predetermined time after the start of the laser irradiation; and determining a characteristic of the particles of interest from the detected fluorescence intensity or fluorescence intensity distribution.