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Aerosol Generation

The power of sound to create fine aerosols.

We generate micro- and nanometer-sized droplet aerosols.

At MicroAcoustiX, we are developing the next-generation of compact, integratable atomizers and aerosol sources, creating directed fine micro- and nanometer-sized droplets using surface acoustic wave technology.

 

Our aerosol sources offer a narrow droplet size distribution and an adjustable flow rate, exhibits low shear forces and can be used with a broad fluid spectrum from aqueous solutions and organic solvents towards highly viscous particle solutions and anorganic inks as well as biological fluids and cell suspensions.

MicroAcoustiX' aerosol sources are available as stand-alone devices as well as for flange-based vacuum system or tube furnace integration and can be seamlessly combined with an autosampler for continuous sample supply.

Surface Acoustic Wave-based aersosol generation

The liquid is fed into the active region of the aerosol chip through an integrated microchannel, where it interacts with the surface acoustic waves in their propagation path and is immediately atomized. With our chip up to 4 different liquids can be fed into the atomization zone at the same time through independent microfluidic channels.

 

SAW-based aerosol sources show considerable advantages over other traditional aerosol generators and, in particular, ultrasonic atomization. SAW aerosol generators use significantly less power and do not require moving parts, orifices (e.g., nozzles), or meshes, and are suited to produce micro- and nanometer-sized droplets with adjustable droplet size distribution.

Broad range of materials and applications

MicroAcoustiX' aersosol sources can be used to generate aerosols for chemical analytics such as mass spectrometry and optical emission spectroscopy, for aersosol-based material deposition and focused aersosol jet printing of particle inks and biological fluids and cell suspensions, for medical applications such as inhalation therapy and odor generation, as well as for all kinds of aerosol research.

Chemical analysis

  • Mass spectrometry

  • Optical emission spectroscopy

Material deposition

  • Aerosol jet printing

  • Microprinting

  • Bioprinting

Medical application

  • Inhalation therapy

  • Olfactory displays
     

Aerosol research

  • Droplet size standards

  • Fundamental investigations

Performance parameters

  • Droplet size: 100 nm - 20 µm (in-/ex-situ adjustable)

  • Flow rate: 1 µl/min - 100 µl/min (up to 1 ml/min possible)

  • Atomization efficiency: 99% , no recirculation of liquid

  • Suitable for highly viscous materials up to 1000 mPas

  • Feeding of up to 4 different liquids at the same time

Publications

Acoustic resonance effects and cavitation in SAW aerosol generation

M. Roudini, J. Manuel Rosselló, O. Manor, C.-D. Ohl, A. Winkler
Ultrasonics Sonochemistry 98, 106530/1-9 (2023)

DOI: https://doi.org/10.1016/j.ultsonch.2023.106530

Surface acoustic wave nebulization improves compound selectivity of low-temperature plasma ionization for mass spectrometry

A. Kiontke, M. Roudini, S. Billig, A. Fakhfouri, A. Winkler, C. Birkemeyer,

Scientific Reports 11, 2948 (2021)

DOI: https://doi.org/10.1038/s41598-021-82423-w

Droplet Generation in Standing-Surface-Acoustic-Wave Nebulization at Controlled Air Humidity

M. Roudini, D. Niedermeier, F. Stratmann, and A. Winkler,

Physical Review Applied 14:1 (2020)

DOI: https://doi.org/10.1103/PhysRevApplied.14.014071

Compact SAW aerosol generator

Winkler, A.; Harazim, S. M.; Collins, D. J.; Brünig, R.; Schmidt, H.; Menzel, S. B.,

Biomed Microdev 19,1 (2017)

DOI: https://doi.org/10.1007/s10544-017-0152-9

SAW-based fluid atomization using mass-producible chip devices

Winkler, A.; Harazim, S. M.; Menzel, S. B.; Schmidt, H.,

Lab Chip 15, 3793-3799 (2015)

DOI: https://doi.org/10.1039/C5LC00756A

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