_tcm18-11426.gif )
High quality research in physical chemistry, chemical physics and biophysical chemistry.
Paper
Phys. Chem. Chem. Phys., 2007, 9, 5353 - 5358, DOI: 10.1039/b709363b
Small angle X-ray scattering measurements probe water nanodroplet evolution under highly non-equilibrium conditions
Barbara E. Wyslouzil, Gerald Wilemski, Reinhard Strey, Soenke Seifert and Randall E. Winans
Our in situ small angle X-ray scattering (SAXS) measurements yield an unprecedented and detailed view of rapidly evolving H2O nanodroplets formed in supersonic nozzles. The SAXS experiments produce spectra in a few seconds that are comparable to small angle neutron scattering (SANS) spectra requiring several hours of integration time and the use of deuterated compounds. These measurements now make it possible to quantitatively determine the maximum nucleation and growth rates of small droplets formed under conditions that are far from equilibrium. Particle growth is directly followed from about 10 µs to 100 µs after particle formation with growth rates of
0.2 to 0.02 nm µs–1. The peak H2O nucleation rates lie between 1017 and 1018 cm–3 s–1.
RSS feed