Dispensing nano-pico droplets and liquid patterning by pyroelectrodynamic shooting

Nat Nanotechnol. 2010 Jun;5(6):429-35. doi: 10.1038/nnano.2010.82. Epub 2010 May 9.

Abstract

Manipulating and dispensing liquids on the micrometre- and nanoscale is important in biotechnology and combinatorial chemistry, and also for patterning inorganic, organic and biological inks. Several methods for dispensing liquids exist, but many require complicated electrodes and high-voltage circuits. Here, we show a simple way to draw attolitre liquid droplets from one or multiple sessile drops or liquid film reservoirs using a pyroelectrohydrodynamic dispenser. Local pyroelectric forces, which are activated by scanning a hot tip or an infrared laser beam over a lithium niobate substrate, draw liquid droplets from the reservoir below the substrate, and deposit them on the underside of the lithium niobate substrate. The shooting direction is altered by moving the hot tip or laser to form various patterns at different angles and locations. Our system does not require electrodes, nozzles or circuits, and is expected to have many applications in biochemical assays and various transport and mixing processes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Dimethylpolysiloxanes / chemistry
  • Equipment Design
  • Microfluidic Analytical Techniques / instrumentation*
  • Microfluidic Analytical Techniques / methods
  • Nanotechnology / instrumentation*
  • Nanotechnology / methods
  • Nanotubes, Carbon / chemistry
  • Oleic Acid / chemistry
  • Plant Oils / chemistry
  • Surface Properties

Substances

  • Dimethylpolysiloxanes
  • Nanotubes, Carbon
  • Plant Oils
  • Oleic Acid
  • baysilon
  • almond oil