<P>The charge at the surface of water and the resultant surface voltage play an important role in many natural phenomena and technological applications. However, the relationship between surface Charge and the interfacial distribution of H+ and ...
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https://www.riss.kr/link?id=A107603464
2016
-
SCOPUS,SCIE
학술저널
12051-12058(8쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>The charge at the surface of water and the resultant surface voltage play an important role in many natural phenomena and technological applications. However, the relationship between surface Charge and the interfacial distribution of H+ and ...
<P>The charge at the surface of water and the resultant surface voltage play an important role in many natural phenomena and technological applications. However, the relationship between surface Charge and the interfacial distribution of H+ and OH- ions remains unclear. We measured the surface voltage produced by an ionized acid or a base at the surface of amorphous solid Water (ASW) using a Kelvin work-function probe and studied the depth distributions of H+ and OH- ions. H+ ions were distributed over a thicker region from the surface than OH- ions, although both ions reside preferentially at the surface. This difference led:to the formation of opposite surface charges in the presence of the acid or base. The deeper penetration of H+ ions is attributed to efficient proton transport, dynamics in the lattice and the resultant dynamic delocalization of protons. The study demonstrates that the asymmetric H+ and OH- distributions may be important to understand, the electrical and acid-base properties of ASW and crystalline ice surfaces and, possibly, those of the liquid water surface as well.</P>