X-ray-Induced Changes in Wettability

AUTHORS: Kwon YB, Weon BM, Won KH, Je JH, Hwu Y, Margaritondo G

Langmuir, 25(4): 1927–1929, January 2009

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ABSTRACT

We observed that hard X-ray irradiation modifies the wettability of a variety of inorganic materials. The smooth surfaces of all tested inorganic materials (ZnO, p-Si, Al₂O₃, SrTiO₃, TiN, ZnS, CuO, Ag₂O, and Cr₂O₃) change during irradiation to a state of superhydrophilic wettability, and such changes are explained by the accumulation of positive surface charges by photoelectron emission. The initial wettability state is re-established within several minutes of storage in deionized water.

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