Adsorption of Sodium Dodecyl Sulfate on Ge Substrate: The Effect of a Low-Polarity Solvent

Autor(es)

Viana, Rommel B. ^[1] ; da Silva, Alberico B. F. ^[1] ; Pimentel, Andre S. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, Dept Chem & Mol Phys, BR-13560970 Sao Carlos, SP - Brazil

^[2] Pontifical Catholic Univ Rio de Janeiro, Dept Chem, BR-22453900 Rio De Janeiro, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES; v. 13, n. 7, p. 7980-7993, JUL 2012.
• Citações Web of Science: 17

Resumo

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) x 10(14) molecules cm(-2) in CHCl3, while with the use of CCl4 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. (AU)

• Processo FAPESP: 05/50722-6 - A formação heterogênea de HNO2 a partir da reação interfacial de NO2 com camadas finas de H2O
• Beneficiário: André Silva Pimentel
• Modalidade de apoio: Bolsas no Brasil - Jovens Pesquisadores
• Processo FAPESP: 04/08227-5 - A formação heterogênea de HNO2 a partir da reação interfacial de NO2 com monocamadas de H2O
• Beneficiário: André Silva Pimentel
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores