Understanding segregation processes in SAMs formed by mixtures of hydroxylated and non-hydroxylated fatty acids

Autor(es)

Bueno, Otto V. M. ^[1] ; Benitez, J. J. ^[2] ; San-Miguel, Miguel A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Inst Chem, Dept Phys Chem, POB 6154, BR-13083970 Campinas, SP - Brazil

^[2] Univ Seville, Ctr Mixto CSIC, Inst Ciencias Mat Sevilla, Avda Amer Vespuccia 49, Seville 41092 - Spain

• Tipo de documento: Artigo Científico
• Fonte: RSC ADVANCES; v. 9, n. 67, p. 39252-39263, DEC 1 2019.
• Citações Web of Science: 0

Resumo

In this paper, we focus on the segregation processes emerging when preparing mixtures with different compositions of aleuritic (9,10,16 trihydroxyhexadecanoic) (ALE) and palmitic (hexadecanoic) (PAL) acids. The combination of atomic force microscopy (AFM) and molecular dynamics (MD) simulations enabled us to prove the role of the functional groups in the formation of self-assembled monolayers (SAMs) on muscovite mica surfaces. MD simulations indicate that segregation processes are favored in high ALE composition mixtures in agreement with the experimental evidence, whereas low ALE compositions promote the co-existence between segregated and dispersed systems. The secondary hydroxyl groups play a central role in the self-assembling mechanism because they control the formation of hydrogen bonding networks guarantying system stability. (AU)

• Processo FAPESP: 16/23891-6 - Modelagem computacional da matéria condensada
• Beneficiário: Alex Antonelli
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs