Titanium dioxide (TiO 2 ) could be doped with as much as 8.7 atom% Cr by means of a sol-gel metho... more Titanium dioxide (TiO 2 ) could be doped with as much as 8.7 atom% Cr by means of a sol-gel method. XRD analysis revealed that the powder of Cr (8.7 atom%)-doped TiO 2 calcined at 500 C consisted of small crystallites ascribale to anatase structure. The thin film of doped TiO 2 (70 m) at this composition was found to behave as a p-type semiconductor on exposure to CO and NO 2 in air: it responded to dilute NO 2 with a sharp decrease in electrical resistance.
Journal of Biomaterials Science, Polymer Edition, 2008
Bio-functional surfaces have been created by printing proteins on antifouling surfaces in a custo... more Bio-functional surfaces have been created by printing proteins on antifouling surfaces in a customised geometry. Human umbilical cord neural stem cells incubated on the samples readily attach to the protein defined domains, where they have been monitored during 21 days of culture. The stability of the pattern varies with the density of cells anchored to the microstamped proteins. Highly packed cell patterned domains favoured non-differentiated mode, while low-density areas allowed the spreading out of the cells and differentiation. Tailoring the geometry (pattern size and distances) enables improving the monitoring of the stem cells' developmental processes. The biocompatible surfaces can serve as a model to study processes accompanying stem cell neural lineage commitment.
Titanium dioxide (TiO 2 ) could be doped with as much as 8.7 atom% Cr by means of a sol-gel metho... more Titanium dioxide (TiO 2 ) could be doped with as much as 8.7 atom% Cr by means of a sol-gel method. XRD analysis revealed that the powder of Cr (8.7 atom%)-doped TiO 2 calcined at 500 C consisted of small crystallites ascribale to anatase structure. The thin film of doped TiO 2 (70 m) at this composition was found to behave as a p-type semiconductor on exposure to CO and NO 2 in air: it responded to dilute NO 2 with a sharp decrease in electrical resistance.
Journal of Biomaterials Science, Polymer Edition, 2008
Bio-functional surfaces have been created by printing proteins on antifouling surfaces in a custo... more Bio-functional surfaces have been created by printing proteins on antifouling surfaces in a customised geometry. Human umbilical cord neural stem cells incubated on the samples readily attach to the protein defined domains, where they have been monitored during 21 days of culture. The stability of the pattern varies with the density of cells anchored to the microstamped proteins. Highly packed cell patterned domains favoured non-differentiated mode, while low-density areas allowed the spreading out of the cells and differentiation. Tailoring the geometry (pattern size and distances) enables improving the monitoring of the stem cells' developmental processes. The biocompatible surfaces can serve as a model to study processes accompanying stem cell neural lineage commitment.
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