page_title: Nano spray dryer
section_title: Spray head
hierarchical_section_title: Nano spray dryer / Spray head
caption_attribution_description: English: Schema of a vibrating mesh of a nano spray dryer.
context_page_description: Nano spray dryers refer to using spray drying to create particles in the nanometer range. Spray drying is a gentle method for producing powders with a defined particle size out of solutions, dispersions, and emulsions which is widely used for pharmaceuticals, food, biotechnology, and other industrial materials synthesis.
  In the past, the limitations of spray drying were the particle size, the yield, and the sample volume. Recently, minimum particle sizes have been reduced to 300 nm, yields up to 90% are possible, and the sample amount can be as small as 1 ml. These expanded limits are possible due to new technological developments to the spray head, the heating system, and the electrostatic particle collector. To emphasize the small particle sizes possible with this new technology, it has been described as "nano" spray drying. However, the smallest particles produced are in the sub-micrometre range common to fine particles rather than the nanometer scale of ultrafine particles.
context_section_description: One of the three new technologies that makes "nano" spray drying possible is the spray head. 
  A piezoelectric system precisely vibrates a fine mesh. Vibration produces fine droplets with a narrow size distribution.
caption: Vibrating mesh of a nano spray dryer spray head
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