Polystyrene-block-polyethylene oxide thin films: In vitro cytocompatibility and protein adsorption testing

2020 ◽  
Vol 15 (1) ◽  
pp. 011003
Author(s):  
Isabela Monteiro A. ◽  
Tarek Kollmetz ◽  
David S. Musson ◽  
Sue R. McGlashan ◽  
Jenny Malmström
Keyword(s):  
Thin Films ◽  
Protein Adsorption ◽  
Polyethylene Oxide ◽  
Oxide Thin Films

Protein Adsorption on Amorphous Metal Oxide Thin Films: An FTIR/ATR and Ellipsometry study

2010 ◽  
Vol 1277 ◽  
Author(s):  
Phaedra Silva-Bermudez ◽  
Sandra E. Rodil
Keyword(s):  
Thin Films ◽  
Protein Adsorption ◽  
Mass Density ◽  
Oxide Thin Films ◽  
Protein Layer ◽  
Metal Oxide Thin Films ◽  
Surface Mass ◽  
Adsorbed Protein ◽  
Surface Mass Density ◽  
Adsorbed Protein Layer

The adsorption of bovine serum albumin (BSA) and fibrinogen proteins dissolved on Phosphate buffer solution onto Ta, Nb and Ti oxide thin films was studied. The metal oxide thin films were deposited by magnetron sputtering on Si(100) wafers and characterized by contact angle measurements and profilometry. Spectroscopic ellipsometry was employed to characterize the kinetics of the protein adsorption process in-situ at the solid-liquid interface and the optical properties of the adsorbed protein layer formed after 45 minutes of immersion of the thin film in the protein solution. Infrared spectroscopy was used to study the proteins within the adsorbed layer. A trend indicating that the surface mass density of the adsorbed protein layer increases as the Rt (peak-to-valley height) surface roughness parameter increases was observed for fibrinogen and BSA. An increment in the surface mass density of the adsorbed protein layer was also observed onto surfaces with higher polar components of the surface energy. BSA and fibrinogen seemed to more readily adsorbed onto tantalum oxide than onto titanium oxide.

Thermally modified amorphous polyethylene oxide thin films as highly sensitive linear humidity sensors

2017 ◽  
Vol 265 ◽  
pp. 102-110 ◽  
Author(s):  
Memoon Sajid ◽  
Ghayas Uddin Siddiqui ◽  
Soo Wan Kim ◽  
Kyoung Hoan Na ◽  
Young Soo Choi ◽  
...  
Keyword(s):  
Thin Films ◽  
Polyethylene Oxide ◽  
Oxide Thin Films ◽  
Humidity Sensors ◽  
Highly Sensitive

Cell Attachment and Protein Adsorption to Polypyrrole thin Films

1992 ◽  
Vol 293 ◽  
Author(s):  
Joyce Y. Wong ◽  
Robert S. Langer ◽  
Donald E. Ingber
Keyword(s):  
Thin Films ◽  
Extracellular Matrix ◽  
Contact Angle ◽  
Protein Adsorption ◽  
Cell Attachment ◽  
Electrochemical Methods ◽  
Conductivity Measurements ◽  
Vis Spectroscopy ◽  
Extracellular Matrix Molecules

AbstractThin films of polypyrrole were synthesized using both chemical oxidative and electrochemical methods. The resulting oxidized films were characterized by UV/VIS spectroscopy, contact angle and conductivity measurements. In vitro studies suggest that extracellular matrix molecules, such as fibronectin, adsorb efficiently onto polypyrrole thin films and that 3T3 Balb/c mouse fibroblasts attach and spread normally on polypyrrole.

scholarly journals Ionic transport in the amorphous phase of semicrystalline polyethylene oxide thin films

Soft Matter ◽  
2017 ◽  
Vol 13 (33) ◽  
pp. 5597-5603 ◽  
Author(s):  
Daniel E. Martínez-Tong ◽  
Luis A. Miccio ◽  
Angel Alegria
Keyword(s):  
Thin Films ◽  
Atomic Force Microscopy ◽  
Transport Properties ◽  
Amorphous Phase ◽  
Polyethylene Oxide ◽  
Ionic Transport ◽  
Oxide Thin Films ◽  
Force Microscopy ◽  
Atomic Force

We present a detailed Atomic Force Microscopy based study on the ionic transport properties of polyethylene oxide (PEO) thin films prepared under different conditions.

Effects of dopant concentration on the microstructure of tin- doped indium oxide thin films

1990 ◽  
Vol 48 (4) ◽  
pp. 716-717
Author(s):  
I. A. Rauf
Keyword(s):  
Thin Films ◽  
Indium Oxide ◽  
Ionic Radius ◽  
Free Carrier ◽  
Electron Gun ◽  
Periodic Lattice ◽  
Oxide Thin Films ◽  
Transmission Electron ◽  
The Difference ◽  
Dopant Atoms

To understand the electronic conduction mechanism in Sn-doped indium oxide thin films, it is important to study the effect of dopant atoms on the neighbouring indium oxide lattice. Ideally Sn is a substitutional dopant at random indium sites. The difference in valence (Sn4+ replaces In3+) requires that an extra electron is donated to the lattice and thus contributes to the free carrier density. But since Sn is an adjacent member of the same row in the periodic table, the difference in the ionic radius (In3+: 0.218 nm; Sn4+: 0.205 nm) will introduce a strain in the indium oxide lattice. Free carrier electron waves will no longer see a perfect periodic lattice and will be scattered, resulting in the reduction of free carrier mobility, which will lower the electrical conductivity (an undesirable effect in most applications).One of the main objectives of the present investigation is to understand the effects of the strain (produced by difference in the ionic radius) on the microstructure of the indium oxide lattice when the doping level is increased to give high carrier densities. Sn-doped indium oxide thin films were prepared with four different concentrations: 9, 10, 11 and 12 mol. % of SnO2 in the starting material. All the samples were prepared at an oxygen partial pressure of 0.067 Pa and a substrate temperature of 250°C using an Edwards 306 coating unit with an electron gun attachment for heating the crucible. These deposition conditions have been found to give optimum electrical properties in Sn-doped indium oxide films. A JEOL 2000EX transmission electron microscope was used to investigate the specimen microstructure.

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