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The adsorption characteristics of sodium dodecyl sulfate (SDS) on stainless steel surface in aqueous solutions as well as the effect of added NaClO4 on adsorption are investigated. The stainless steel surface is hydrophobic when wetted by water and negatively charged in SDS solutions, which was characterized by performing open circuit potential (EOCP) and zero charge potential (EPZC) measurements...
The effects of pH on the initial shear thinning and subsequent thickening behaviors of fumed silica suspensions with increased shear rate were investigated. The critical shear stress observed at the onset of the shear thickening of suspensions can be tuned through the pH of added aqueous solutions. The increase in pH of the addition shifts the onset of shear thickening to higher shear stresses. This...
Double-stranded DNA films (200bp) were prepared on 3-aminopropyltriethoxy-silane (APS)-modified mica surfaces in the NaCl solution with concentration ranging from 0.001 to 0.1M. By using an atomic force microscope, the force–distance curve and friction behaviour of each DNA film was studied in the NaCl solution that was used in the sample preparation. When the concentration of NaCl solution decreased...
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