Laboratory of Chemistry & Materials Technology
SERVICES
Manufacturing of
- Lab-scale, tailor-made devices
Studies on
- Xray Diffraction & Reitveld Analysis
- Thermal analysis (TGA, DTA,DSC)
- SEM (EDX)
- Chemical Analysis (GFAAS, photometric)
- Waste valorization in ceramics
- Environmental leaching tests
Optimization/consulting on
- Ceramic products development
- Ceramic processing
Manufacturing of special ceramics
Short Description
Ceramic crucibles, tubes, rods made from Al2O3, YSZ etc. Membranes for MIEC, Electrolytes, Proton conductive etc. Special geometries may be manufactured on-demand.
Relevant Publications
Development of Layered Anode Structures Supported over Apatite-Type Solid Electrolytes
P. Pandis, T. Kharlamova, V. Sadykov, and V. N. Stathopoulos, MATEC Web of Conferences, 41 (2016) 04001
Shape Forming of Ceramic Tubes for Electrochemical Reactors by Gel-Casting Method
V. Chalkia, P. Pandis, V.N. Stathopoulos, ECS Transactions, 68 (2015) 2339-2348
Contact Angle, Roll-off angle and surface energy measurements: Plane surfaces, non-plane surfaces, fibers, porous media
Short Description
We measure static / dynamic (advancing, receding) contact angle, roll-off angle, shedding angle, surface free energy of solid and its distribution (dispersive force, polar force and hydrogen bond force, etc.), interface tension of liquid-gas / liquid-liquid etc.
Special configurations,e.g. at higher temperatures, at controlled ambient environement, or in combination with analytical devices are available upon discussion.
Relevant Publications
Droplet mobility manipulation on porous media using backpressure
N. Vourdas, G. Pashos, G. Kokkoris, A. G. Boudouvis, and V.N. Stathopoulos, Langmuir, 32 (2016) 5250–5258.
Water-Repellent Approaches for 3-D Printed Internal Passages
A. Milionis, C. Noyes, E. Loth, I.S. Bayer, A.W. Lichtenberger, V.N. Stathopoulos, N. Vourdas, Materials and Manufacturing Processes, 31 (2016) 1162-1170.
Active porous valves for plug actuation and plug flow manipulation in open channel fluidics
N. Vourdas, K. Dalamagkidis and V. Stathopoulos, RSC Advances, 5 (2015) 104594-104600.
Reversible and dynamic transitions between sticky and slippery states on porous surfaces with ultra-low backpressure
N. Vourdas, C. Ranos, V.N. Stathopoulos, RSC Advances, 5 (2015) 33666-33673.
Reversible pressure-induced switching of droplet mobility after impingement on porous surface media
N. Vourdas, A. Tserepi, V.N. Stathopoulos, Applied Physics Letters, 103 (2013) 111602.
Deposition of hydrophobic coatings on surfaces, porous networks and 3d-printed objects
Short Description
Teflon-like monolayers from fluoro-containing silane vapours on plane surfaces, porous networks and 3d-printed structures.
Relevant Publications
Droplet mobility manipulation on porous media using backpressure
N. Vourdas, G. Pashos, G. Kokkoris, A. G. Boudouvis, and V.N. Stathopoulos, Langmuir, 32 (2016) 5250–5258.
Water-Repellent Approaches for 3-D Printed Internal Passages
A. Milionis, C. Noyes, E. Loth, I.S. Bayer, A.W. Lichtenberger, V.N. Stathopoulos, N. Vourdas, Materials and Manufacturing Processes, 31 (2016) 1162-1170.
Active porous valves for plug actuation and plug flow manipulation in open channel fluidics
N. Vourdas, K. Dalamagkidis and V. Stathopoulos, RSC Advances, 5 (2015) 104594-104600.
Reversible and dynamic transitions between sticky and slippery states on porous surfaces with ultra-low backpressure
N. Vourdas, C. Ranos, V.N. Stathopoulos, RSC Advances, 5 (2015) 33666-33673.
Reversible pressure-induced switching of droplet mobility after impingement on porous surface media
N. Vourdas, A. Tserepi, V.N. Stathopoulos, Applied Physics Letters, 103 (2013) 111602.
Valving for fluidics
Short Description
We have developed a tool (uVALVIT) for actuation and valving in fluidics utilizing the manipulation scheme for liquid droplet/plug mobility on hydrophobic porous surfaces, by means of backpressure. With uVALVIT, the gas pockets characteristics at the liquid–solid interface are controlled, which in turn play a crucial role at the mechanics of the plug adhesion.The adequate backpressure is ultra-low and is directly related to the ultra low energy demands of the entire tool.
With uVALVIT the use of electromagnetic energy, foreign particles, oily phases, or moving elements is avoided. The liquid phase remains unaffected both chemically and thermally. uVALVIT is also amenable to integration in miniaturized, low power, portable devices such as microfuidics, and lab-on-chip devices, as well as in large scale applications.
Relevant Publications
uVALVIT: A tool for droplet mobility control and valving
N. Vourdas, K. Dalamagkidis, and V.N. Stathopoulos, MATEC Web of Conferences, 41 (2016) 04003
Active porous valves for plug actuation and plug flow manipulation in open channel fluidics
N. Vourdas, K. Dalamagkidis and V. Stathopoulos, RSC Advances, 5 (2015) 104594-104600.
Reversible and dynamic transitions between sticky and slippery states on porous surfaces with ultra-low backpressure
N. Vourdas, C. Ranos, V.N. Stathopoulos, RSC Advances, 5 (2015) 33666-33673.