| Autor: |
Ivan A. Mik, Galina G. Dultseva, Fedor N. Dultsev, Sergei N. Dubtsov |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.2075567 |
| Popis: |
We describe the new procedure developed to determine the functional groups on the surface of nanoparticles formed in photonucleation of furfural, one of the aldehydes generated during forest fire events. The procedure is based on the detection of nanoparticle rupture from chemically modified surface of the quartz crystal microbalance oscillating in the thickness shear mode under voltage sweep. The rupture force is determined from the voltage at which the rupture occurs. It depends on particle mass and on the affinity of the surface functional groups of the particle to the groups that are present on the modified QCM surface. It was demonstrated with the amine modification of the surface that the nanoparticles formed in furfural photonucleation contain carbonyl and carboxyl groups. The applicability of the method for the investigation of functional groups on the surface of the nanoparticles of atmospheric aerosol is demonstrated. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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