title: Adsorption of sodium dodecyl sulfate on Ge substrate: the effect of a low-polarity solvent.
abstract: This paper describes the adsorption of sodium dodecyl sulfate (SDS) molecules in a low polar solvent on Ge substrate by using Fourier transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy and atomic force microscopy (AFM). The maximum SDS amount adsorbed is (5.0 ± 0.3) × 10(14) molecules cm(-2) in CHCl(3), while with the use of CCl(4) as subphase the ability of SDS adsorbed is 48% lower. AFM images show that depositions are highly disordered over the interface, and it was possible to establish that the size of the SDS deposition is around 30-40 nm over the Ge surface. A complete description of the infrared spectroscopic bands for the head and tail groups in the SDS molecule is also provided.
authors.affiliation: Department of Chemistry and Molecular Physics, Institute of Chemistry of São Carlos, University of São Paulo,13560-970, São Carlos, SP, Brazil.
authors.forename: Rommel B
authors.initials: RB
authors.lastname: Viana
authors.affiliation: Department of Chemistry and Molecular Physics, Institute of Chemistry of São Carlos, University of São Paulo,13560-970, São Carlos, SP, Brazil.
authors.forename: Albérico B F
authors.initials: ABF
authors.lastname: Da Silva
authors.affiliation: Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, 22453-900, Rio de Janeiro, RJ, Brazil.
authors.forename: André S
authors.initials: AS
authors.lastname: Pimentel
mesh_terms: D000327:Adsorption; D002725:Chloroform / Q000737:chemistry; D005857:Germanium / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D012997:Solvents; D013501:Surface-Active Agents; D005857:Germanium; D012967:Sodium Dodecyl Sulfate; D002725:Chloroform