Device and method for the contactless manipulation and alignment of sample particles in a measurement volume using a nonhomogeneous electric alternating field

US8076632B2 · kind B2 · utility

Assignee

• Universitaet Leipzig · DE

Inventors

• Moritz Kreysing · Dresden, DE
• Jochen Guck · Leipzig, DE
• Josef Kaes · Leipzig, DE

Key dates

• Filing date: Dec 21, 2007
• Grant date: Dec 13, 2011
• Expiry date: Dec 20, 2028

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B03C5/026
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a device for contactless manipulation and alignment of sample particles in a measurement volume using a nonhomogeneous electric alternating field, comprising a radiation source for emitting electromagnetic radiation and optical means for guiding the electromagnetic radiation into the measurement volume. The device is characterized in that the optical means include a beam shaping device for generating an intensity profile that is asymmetrical about the beam axis, wherein sample particles in the measurement volume can be trapped in a nonhomogeneous field distribution of the electric field generated by the asymmetrical intensity profile, that for the purpose of entraining sample particles trapped in the nonhomogeneous field distribution there is provided a rotating device to effect rotation of the asymmetrical intensity profile about the beam axis relatively to the measurement volume, and that the electromagnetic radiation beam in the measurement volume is unfocused, more particularly, divergent. The invention further relates to a method for contactless manipulation and alignment of sample particles in a measurement volume using a nonhomogeneous electric field…