It can be just a simple dye that can be aerosolized using heating. We can use UV light for fluorescent dyes as well. Thank you for help!
Do you intend the dye to be the aerosol? Flow visualization using fuming? What are your limits for temperature?
How large a volume do you need to visualize?
Is it possible to spray a solution ?
A simple green laser can produce fluorescence in olive oil. Several other oils may be used.
I would advise you the dyes with which I had to work at high temperatures up to 500-600 K in the gas phase - 3 aminophthalimide, 3.6-diaminophthalimide and their methylated analogues such as 3-amino-N-methylphthalimide. It is not expensive.
At lower temperature 300K-400K you have the tetrazine familly. C2N4Cl2.
Thank you for you replies! I intend to use those dyes in ambient (lab) temperature. It's relatively small volume (a model of human throat and bronchi). I will atomize it with several techniques and observe a mixing of streams in our model. I think that the simplest way would be to use color dyes which do not require laser excitation, just visible in normal fluorescent light but tetrazines look interesting for sedimentation (impaction) studies.
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