SEIRAS Study of Chloride-Mediated Polyether Adsorption on Cu.

ABSTRACT: Surface-enhanced infrared absorption spectroscopy is used to examine the co-adsorption of a selection of polyethers with Cl^- under conditions relevant to superconformal Cu electrodeposition in CuSO₄-H₂SO₄ electrolytes. In 0.1 mol/L H₂SO₄, a potential-dependent mixed SO₄ ^2--H₃O⁺/H₂O layer forms on weakly textured (111) Cu thin-film surfaces. With the addition of 1 mmol/L NaCl, the SO₄ ^2--H₃O⁺/H₂O adlayer is displaced and rapidly replaced by an ordered halide layer that disrupts the adjacent solvent network, leading to an increase in non-hydrogen-bonded water that makes the interface more hydrophobic. The altered wetti

SUBMITTER: Liu GK 

PROVIDER: S-EPMC7543089 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature