Bisphosphonates on Smooth TiO2: Modeling and Characterization

Autor(es)

Dias, Leonardo F. G. ; Rheinheimer, Joao P. C. ; Gomes, Orisson P. ; Noeske, Michael ; Stamboroski, Stephani ; Bronze-Uhle, Erika S. ; Mainardi, Maria C. ; Cavalcanti, Welchy L. ; Neto, Augusto B. ; Lisboa-Filho, Paulo N.

• Tipo de documento: Artigo Científico
• Fonte: CHEMISTRYSELECT; v. 7, n. 19, p. 9-pg., 2022-04-20.

Resumo

This paper presents insights into surfaces properties of sputter-deposited titania modified with bisphosphonates, including zeta potential measurements in a pH range. Functionalization was investigated through simulation and experimental approaches to model the adsorbate and evaluate structure-response relationships. Molecules of etidronic, alendronic, and risedronic acids were investigated through density functional theory. The molecules vary their reactivity through similar structures considering different scenarios. X-ray photoelectron spectroscopy of titania/BP systems demonstrated that functionalization occurs in a short time and resulted in a predominantly "side-on" adsorbate configuration after two hours of immersion. Zeta potential showed the predominancy of negative charges deprotonated free phosphonates. Water contact angle demonstrated that titania surfaces are hydrophilic after overnight functionalization. Atomic force measurements of bisphosphonates layers suggested that the molecular anions follow the surface topography, unchanging the surface roughness. (AU)

• Processo FAPESP: 18/07520-3 - Imobilização de bisfosfonatos em superfícies de filmes nanoestruturados de TiO2 e hidroxiapatita
• Beneficiário: Leonardo Francisco Gonçalves Dias
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 19/13100-0 - Estudos de superfícies de hidroxiapatita e TiO2 funcionalizadas com bisfosfonatos
• Beneficiário: Leonardo Francisco Gonçalves Dias
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto
• Processo FAPESP: 19/09431-0 - Materiais hemocompatíveis com superfícies modificadas por moléculas zwitteriônicas
• Beneficiário: Orisson Ponce Gomes
• Modalidade de apoio: Bolsas no Brasil - Doutorado