Physical and Chemical Control of Interface Stability in Porous Si-Eumelanin Hybrids
- Resource Type
- Authors
- Claudio Melis; Guido Mula; Elisa Pinna; Mehran Mehrabanian; Aleandro Antidormi; Luciano Colombo; Eugenio Redolfi Riva; Eleonora Cara; Giancarlo Cappellini; Giulia Aprile; Roberta Farris; Roberto Cardia; Alessandro Pezzella; Marco d'Ischia
- Source
- Journal of physical chemistry. C (2018). doi:10.1021/acs.jpcc.8b09728
info:cnr-pdr/source/autori:Antidormi A., Aprile G., Cappellini G., Cara E., Cardia R., Colombo L., Farris R., D'Ischia M., Mehrabanian M., Melis C., Mula G., Pezzella A., Pinna E., Redolfi Riva E./titolo:Physical and Chemical Control of Interface Stability in Porous Si-Eumelanin Hybrids/doi:10.1021%2Facs.jpcc.8b09728/rivista:Journal of physical chemistry. C/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume
- Subject
- Materials science
Interface (Java)
technology, industry, and agriculture
02 engineering and technology
equipment and supplies
010402 general chemistry
021001 nanoscience & nanotechnology
Porous silicon
01 natural sciences
Chemical controls Chemical species Interface stabilities Nanoscale structure Organic/inorganic interfaces Polymer densities Polymer molecule Porous structures
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
General Energy
Chemical engineering
Organic inorganic
Physical and Theoretical Chemistry
0210 nano-technology
Chemical control
Porosity
- Language
- English
The organic/inorganic interface in thin nanosized porous structures has a key role in determining the final properties of the composite materials. By use of the porous silicon/eumelanin hybrids as a case study, the role of this interface was investigated by experimental and computational methods. Our results show that an increased polymer density close to the hybrid interface strongly modifies the diffusion of the chemical species within the polymer molecule, affecting then the oxidation level of the pores' inner Si surface. We observed a greater stability induced by increased pore diameter, a behavior that with computational and chemical arguments we attributed to a modified diffusion of the hydrogen peroxide toward the Si/eumelanin interface. Our results show that the overall behavior of a polymer when inserted in a tiny nanoscale structure must be taken into account for a correct understanding and control of the hybrids properties and that the formation of the interface alone may not be sufficient. © 2018 American Chemical Society.