Investigation of Nanophysical Properties of Aging Polyamide Nanofibrillar Tissue Scaffolds by TEM, SAED, Contact Angle and Raman Spectroscopies

2012 ◽  
Vol 1417 ◽  
Author(s):  
Virginia M. Ayres ◽  
Kan Xie ◽  
Volkan Mujdat Tiryaki ◽  
Ijaz Ahmed ◽  
David I. Shreiber
Keyword(s):  
Contact Angle ◽  
Physical Properties ◽  
Tissue Scaffolds ◽  
Tissue Scaffold ◽  
3 Dimensional ◽  
Cell Responses ◽  
Selected Area Electron Diffraction ◽  
Angle Measurements ◽  
Transmission Electron ◽  
Contact Angle Measurements

ABSTRACTThe nanoscale physical properties of newly electrospun polyamide nanofibrillar matrices < 1 year old versus those that were > 3 year old were investigated with transmission electron microscopy, selected area electron diffraction, contact angle measurements, and Raman spectroscopy. Significant differences in crystallinity, hydrophobicity, and chemistry were found and correspondingly different cell responses by cerebellar granular neurons were observed. The properties of the aged nanofibrillar scaffolds evoked a response for neuron burrowing into a more 3-dimensional environment in addition to better facilitation of neurite outgrowth. The nanophysical properties of tissue scaffolds have been recently shown to directly and indirectly regulate cellular responses. As physical properties can evolve over time, the present investigation addresses the issue of tissue scaffold shelf life, with possible changes in directive signals to cells.

Wettability Determination by Equilibrium Contact Angle Measurements: Reservoir Rock- Connate Water System With Injection of CO2

2012 ◽  
Author(s):  
Narjes Shojaikaveh ◽  
Cas Berentsen ◽  
Susanne Eva Johanne Rudolph-Floter ◽  
Karl Heinz Wolf ◽  
William Richard Rossen
Keyword(s):  
Contact Angle ◽  
Water System ◽  
Reservoir Rock ◽  
Equilibrium Contact Angle ◽  
Connate Water ◽  
Angle Measurements ◽  
Contact Angle Measurements

Surface Wettability Enhances Osteoblast Adhesion on Silicon-Substituted Hydroxyapatite Thin Films

2007 ◽  
Vol 330-332 ◽  
pp. 877-880 ◽  
Author(s):  
E.S. Thian ◽  
J. Huang ◽  
Serena Best ◽  
Zoe H. Barber ◽  
William Bonfield
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Actin Filaments ◽  
Culture Study ◽  
Cell Culture Study ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Osteoblast Adhesion ◽  
Lower Contact

Crystalline hydroxyapatite (HA) and 0.8 wt.% silicon-substituted HA (SiHA) thin films were produced using magnetron co-sputtering. These films were subjected to contact angle measurements and in vitro cell culture study using human osteoblast-like (HOB) cells. A wettability study showed that SiHA has a lower contact angle, and thus is more hydrophilic in nature, as compared to HA. Consequently, enhanced cell growth was observed on SiHA at all time-points. Furthermore, distinct and well-developed actin filaments could be seen within HOB cells on SiHA. Thus, this work demonstrated that the surface properties of the coating may be modified by the substitution of Si into the HA structure.

Characterization of plasma-treated poly (hydroxybutyrate) membrane surfaces by ESCA and contact angle measurements

1992 ◽  
Vol 73 (2-3) ◽  
pp. 163-172 ◽  
Author(s):  
Dietmar Flösch ◽  
Giorgio Clarotti ◽  
Kurt E. Geckeler ◽  
François Schué ◽  
Wolfgang Göpel
Keyword(s):  
Contact Angle ◽  
Membrane Surfaces ◽  
Angle Measurements ◽  
Contact Angle Measurements

scholarly journals Surface Modification of the Alloy Ti-7.5Mo by Anodization for Biomedical Applications

2016 ◽  
Vol 869 ◽  
pp. 913-917 ◽  
Author(s):  
Ana Lucia do Amaral Escada ◽  
Javier Andres Muñoz Chaves ◽  
Ana Paula Rosifini Alves Claro
Keyword(s):  
Contact Angle ◽  
Electron Microscope ◽  
Biomedical Applications ◽  
Anatase Phase ◽  
Ammonium Fluoride ◽  
X Ray ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Simple Surface ◽  
Scanning Electron

The purpose of this study was to evaluate the TiO2 nanotubes growth and the variation in its diameter to improve the surface properties of Ti-7.5Mo to use for biomedical applications. For the nanotubes TiO2 growth, the samples were anodized in glycerol and ammonium fluoride and divided according to the anodizing potential at 5V to 10V and 24 hour time. The surfaces were examined by scanning electron microscope (SEM), X-ray analysis (XRD) and contact angle measurements. The average tube diameter, ranging in size from 13 to 23 nm, was found to increase with increasing anodizing voltage. It was also observed a decrease in contact angle in accordance with the increase in the anodizing potential. The X-ray analysis showed the presence of anatase phase in samples whose potential was 10V and this condition represents a simple surface treatment for Ti-7.5Mo alloy that has high potential for biomedical applications.

The use of contact angle measurements to estimate the adhesion propensity of calcium carbonate to solid substrates in water

2009 ◽  
Vol 255 (9) ◽  
pp. 4873-4879 ◽  
Author(s):  
Sameer Bargir ◽  
Steve Dunn ◽  
Bruce Jefferson ◽  
Jitka Macadam ◽  
Simon Parsons
Keyword(s):  
Contact Angle ◽  
Calcium Carbonate ◽  
Angle Measurements ◽  
Solid Substrates ◽  
Contact Angle Measurements
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