Conformation in Ultrathin Polymer Brush Coatings Resolved by Infrared Nanoscopy.
Anal Chem
; 92(7): 4716-4720, 2020 04 07.
Article
em En
| MEDLINE
| ID: mdl-32129604
ABSTRACT
Polymer brush coatings are effective in preventing blood coagulation or bacterial attachment, but their chain conformation, while vital for this effect, was never characterized in high spatial resolution. Here, we report mid-infrared spectroscopic nanoscopy studies of few-nanometer-thin poly(ethylene oxide) (PEO) films which reveal marked spectral variations along the surface at a length scale smaller than 100 nm and originating only from the physical conformation of the chains. The conformation and average orientation of the polymer chains in the layer is extracted from the spectra with the aid of theoretic modeling, confirming the spontaneous formation of a crystalline phase. This result suggests spectroscopic nanoscopy as a powerful new tool to characterize polymer brush coatings.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polietilenoglicóis
/
Nanotecnologia
Idioma:
En
Revista:
Anal Chem
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
República Tcheca