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Rewrite the textbooks on water's surface tension: Air-water interface is negatively charged by the adsorption of hydroxide ions

Date:
March 19, 2014
Source:
University of Melbourne
Summary:
Researchers in Australia are confident their new research results will make significant differences to the calculations of surface tension of water used by the next generation of atmospheric scientists, biophysicists and engineers of technology like inkjet printers. These latest investigations have clinched a long-standing controversy amongst the physical Chemistry community; the air-water interface is negatively charged by the adsorption of hydroxide ions.

Researchers from the University of Melbourne and University of Sydney are confident their new reaserach results will make significant differences to the calculations of surface tension of water used by the next generation of atmospheric scientists, biophysicists and engineers of technology like inkjet printers.

These latest investigations have clinched a long-standing controversy amongst the physical Chemistry community; the air-water interface is negatively charged by the adsorption of hydroxide ions.

Prof Angus Gray-Weale from the Chemistry, Department of Chemistry University of Melbourne said, "The surface tension of water affects its behavior and changes with pH but previous research about the adsorption of various ions at the interface all ignored the presence of the hydroxide ion and its charge."

"We now need to rewrite the text book models of surface tension for the next generation of chemists who work at the refined molecular level."

Prof James Beattie from University of Sydney said, "Previous simulations and models are now recognised as inaccurate. I would estimate many hundreds of thousands of hours of computer time have been wasted because the theoreticians have not included the charge of the hydroxide in their boundary conditions for the simulations, thereby leaving out the strongest force in the system."

The announcement was made in the Journal of Colloid and Interface Science.


Story Source:

The above story is based on materials provided by University of Melbourne. Note: Materials may be edited for content and length.


Journal Reference:

  1. James K. Beattie, Alex M. Djerdjev, Angus Gray-Weale, Nikola Kallay, Johannes Lützenkirchen, Tajana Preočanin, Atiđa Selmani. pH and the surface tension of water. Journal of Colloid and Interface Science, 2014; 422: 54 DOI: 10.1016/j.jcis.2014.02.003

Cite This Page:

University of Melbourne. "Rewrite the textbooks on water's surface tension: Air-water interface is negatively charged by the adsorption of hydroxide ions." ScienceDaily. ScienceDaily, 19 March 2014. <www.sciencedaily.com/releases/2014/03/140319094217.htm>.
University of Melbourne. (2014, March 19). Rewrite the textbooks on water's surface tension: Air-water interface is negatively charged by the adsorption of hydroxide ions. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2014/03/140319094217.htm
University of Melbourne. "Rewrite the textbooks on water's surface tension: Air-water interface is negatively charged by the adsorption of hydroxide ions." ScienceDaily. www.sciencedaily.com/releases/2014/03/140319094217.htm (accessed October 23, 2014).

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