Ultrasonic Spray Systems for Carbon Nanotube Coatings
Ultrasonic nozzles are used to spray carbon nanotubes to create homogenous, uniform layers in energy, electronics, or other nanotechnology applications. Since CNTs are prone to agglomerate in solution, Sono-Tek nozzles are uniquely well suited to carbon nanotube spray applications, as the ultrasonic vibrations of the nozzle continuously disperse agglomerates in suspension during the coating process.
Ultrasonic nozzles systems are used for carbon nanotube spray applications such as:
- Sensors and sensor array devices
- To increase strength and flexibility of a substrate
- In chemical detection systems
- To create the electrodes in ultra capacitor batteries
- To improve the healing process for broken bones by providing a carbon nanotube scaffold for new bone material to grow on
Carbon Nanotubes have shown great promise as an economical alternative to making transparent conductive oxide (TCO) layers, commonly used with organic and dye-sensitized cells, as well as several other electronics applications. Sono-Tek’s ability to spray carbon nanotubes makes R&D processes ideal for using ultrasonic nozzle technology. The ability to create efficient transparent conductive films with CNTs at low temperatures allows the possibility to greatly reduce manufacturing costs of the TCO layer.
Benefits of Ultrasonic Technology for Carbon Nanotube Spray Coatings:
- De-agglomeration of particles in suspension
- Choice of droplet size, depending on nozzle frequency
- Cost effective spray equipment with full lab scale R&D and production systems
- Soft, pressure-less ultrasonic spray will not damage delicate structures
- Proven process spraying carbon nanotube suspensions
Similar applications to carbon nanotube spray deposition in which Sono-Tek nozzles have been proven for are nanowires or graphene spray deposition. The same benefits of deagglomeration and uniform dispersion of particles is seen in applications spraying these nanosuspensions.
Right: CNT’s agglomerated prior to ultrasonic dispersion.
Left: Evenly dispersed CNT’s following ultrasonic disepersion.
The soft nature of the atomized spray will not break delicate carbon nanotube structures.
Sono-Tek also offers the SonicSyringe, an ultrasonic dispersion syringe pump capable of mixing particles in nanosuspension in a matter of seconds and holding them evenly dispersed for several hours or more.