Athanasios T. Giannitsis

Experienced with procedures concerning experiments in electronics, physics and cleanroom laboratories. Determinant contribution in projects with affinity to measurements, testing and characterization of materials, components, and devices. Specialised in ferromagnetism, electronic instrumentation, electrical characterization of materials, microfluidics, impedance spectroscopy, cleanroom procedures.

Researched complex fluids and soft matter with the emphasis in electrical characterization of multiphase fluids and liquid suspensions. Technical expertise involves analysis, with electrical impedance techniques, of magnetic materials, nanoparticle ferrofluids, and electrolytic fluids. Contribution in researching methodologies associated with microfluidics, electrical impedance sensing, microelectrode integration, cytometry and nanoparticle detection. Engineering applications involved microfluidic device fabrication and optimization, with a direct application the electrical actuation and impedimetric assessment of fluids. Resolved insulation and hydrophobisation problems in microfluidics and evaluated coated interfaces by means of electrical impedance, contact angle goniometry and ellipsometry. Other research contributions involve the determination of microscopic parameters of magnetic nanoparticles, such as size distribution, relaxation time, magnetic anisotropy and gyromagnetic ratio, which measured with broadband impedance spectroscopy. These measurements explained magnetic relaxation and resonance phenomena in ferrofluids. Inclusive specialization in topics relating to electromagnetism, including radio wave propagation, antennas, waveguides, transmission lines, and electromagnetic compatibility.

• A.T. Giannitsis, "Microfabrication of biomedical lab-on-chip devices", Estonian Journal of Engineering, 17, 109-139, (2011).
• A.T. Giannitsis, T. Parve, M. Min, "Integration of biosensors and associated electronics on lab-on-chip devices", Electronics and Electrical Engineering, 110, 61-66, (2011).
• B.P. Cahill, A.T. Giannitsis, R. Land, G. Gastrock, U. Pliquett, D. Frense, M. Min, D. Beckmann, “Reversible electrowetting on silanized silicon nitride”, Sensors and Actuators: B. Chemical, 144, 380–386, (2010).
• P.C. Fannin, L. Cohen-Tannoudji, E. Bertrand, A.T. Giannitsis, C. Mac Oireachtaigh, J. Bibette, “Investigation of the complex susceptibility of magnetic beads containing maghemite nanoparticles”, Journal of Magnetism and Magnetic Materials, 303, 147-152, (2006).
• O. Ayala-Valenzuela, J. Matutes-Aquino, R. Betancourt-Galindo, O. Rodríguez Fernández, P.C. Fannin, A.T. Giannitsis, “Synthesis and complex magnetic susceptibility characterization of magnetic fluids in different liquid carriers”, Journal of Applied Physics, 97, 10Q914, (2005).
• O. Ayala-Valenzuela, J. Matutes-Aquino, R. Betancourt-Galindo, L.A. García-Cerda, O. Rodríguez Fernández, P.C. Fannin, A.T. Giannitsis, “Magnetite-cobalt ferrite nanoparticles for kerosene-based magnetic fluids”, Journal of Magnetism and Magnetic Materials, 294, e37-e41, (2005).
• A.T. Giannitsis, P.C. Fannin, S.W. Charles, “Nonlinear effects in magnetic fluids”, Journal of Magnetism and Magnetic Materials, 289, 165-167, (2005).
• P.C. Fannin, B.K.P. Scaife, A.T. Giannitsis, C. Mac Oireachtaigh, “High frequency ferromagnetic resonance measurements in magnetic fluids”. Journal of Magnetism and Magnetic Materials, 289, 159-161, (2005).
• P.C. Fannin, C.N. Marin, I. Malaescu, A.T. Giannitsis, “Microwave absorption of composite magnetic fluids”. Journal of Magnetism and Magnetic Materials, 289, 78-80, (2005).
• P.C. Fannin, A.T. Giannitsis, “Investigation of the field dependence of magnetic fluids exhibiting aggregation”. Journal of Molecular Liquids, 114, 89-96, (2004).
• P.C. Fannin, C.N. Marin, V. Socoliuc, G.M. Istratuca, A.T. Giannitsis, “The effect of colloidal stabilization upon ferrimagnetic resonance in magnetic fluids in the presence of a polarizing magnetic field”. Journal of Physics D: Applied Physics, 36, 1227-1235, (2003).
• P.C. Fannin, B.P.K. Scaife, A.T. Giannitsis, S.W. Charles, “Determination of the radius of nano-particles in a magnetic fluid by means of a constant frequency measurement technique”. Journal of Physics D: Applied Physics, 35, 1305, (2002).
• P.C. Fannin, S.W. Charles, D. Vincent, A.T. Giannitsis, “Measurement of the high-frequency complex permittivity and apparent conductivity of magnetic fluids”. Journal of Magnetism and Magnetic Materials, 252, 80-82, (2002).
• P.C. Fannin, S.W. Charles, R.W. Chantrell, A.T. Giannitsis, “Studies of the effect of polarizing field and particle interactions on the resonant frequency of magnetic nano-particles in colloidal suspensions”. Journal of Magnetism and Magnetic Materials, 252, 65-67, (2002).
• P.C. Fannin, Y.L. Raikher, A.T. Giannitsis, S.W. Charles, “Investigation of the influence which material parameters have on the signal to noise ratio of nanoparticles”. Journal of Magnetism and Magnetic Materials, 252, 114-116, (2002).
• M.Timko, P.Kopcansky, M.Koneracka, A. Skumiel, M. Labowski, A. Jozefczak, D. Bica, O. Balau, L.Vekas, P.C. Fannin, A.T. Giannitsis., “The comparative study of particle size distribution in magnetic fluids”. Czechoslovak Journal of Physics, 52, A281-284, (2002).
• P.C. Fannin, A. Slawska-Waniewska, P. Didukh, A.T. Giannitsis, S.W. Charles, “Dynamic properties of a system of cobalt nanoparticles”, European Physics Journal AP. 17, 3-9, (2002).
• P.C. Fannin, A.T. Giannitsis, S.W. Charles, “Frequency dependent loss tangent and power factor of magnetic fluids”, Journal of Magnetism and Magnetic Materials. 226-230, 1887-1889, (2001).
• P.C.Fannin, T.S. Perova, A.T. Giannitsis, M. Nolan, R.A. Moore, H.S. Gamble, “Dielectric properties of thin films formed on silicon”, Journal of Materials and Science: Materials in Electronics. 12, 347-350, (2001).
• P.C. Fannin, A.T. Giannitsis, S.W. Charles, “Detection of aggregates in magnetic colloids”. European Physics Journal AP, 12, 93-98, (2000). 

Proceedings

• A.T. Giannitsis, D. Oosterlee, S. Leygeber, (2016), “Advectional mixing in microfluidics”, Proceedings of the Leiden Academic Center for Drug Research (LACDR) spring symposium, 24 May 2016, Leiden, Netherlands, p. 81.
• A.T. Giannitsis, B. van Heuvelen, P. Vulto, T. Hankemeier, (2015), “Towards instantaneous mixing for enzymatic reaction calorimetry”, Proceedings of the Biotechnology based Ecologically Balanced Sustainable Industrial Consortium (BE-Basic) symposium, 31 March-1 April 2015, Noordwijkerhout, Netherlands, p. 79.
• A.T. Giannitsis, B. van Heuvelen, P. Vulto, T. Hankemeier (2014), “Interfacing separations with enzyme activity”, Proceedings of the Biotechnology based Ecologically Balanced Sustainable Industrial Consortium (Be-Basic) Foundation Annual Meeting Flagship 1, 20 November 2014, Wagenigen, Netherlands.
• J. Ojarand, A.T. Giannitsis, M. Min, R. Land, (2011), "Front-end electronics for impedimetric microfluidic devices", Proceedings of SPIE Bioelectronics, Biomedical, and Bioinspired Systems V; and Nanotechnology, V, 18-20 April 2011, Prague, Czech Republic, Vol. 8068, p. 80680R-1.
• A.T. Giannitsis, M. Min, (2010), "Usage of microfluidic lab-on-chips in biomedicine", Proceedings of IEEE 12th Biennial Baltic Electronics Conference, 4-6 October , Tallinn, Estonia, pp. 249 - 252.
• A.T. Giannitsis, M.Min, (2010), "Fabrication methods for microfluidic lab-on-chips", Proceedings of IEEE 12th Biennial Baltic Electronics Conference, 4-6 October , Tallinn, Estonia, pp. 69 - 72. 
• M.Min, A.T.Giannitsis, R.Land, B. P. Cahill, U. Pliquett, T. Nacke, D. Frense, G. Gastrock, D. Beckmann, (2009), “Comparison of rectangular wave excitations in broad band impedance spectroscopy for microfluidic applications”, Proceedings of IFMBE World Congress 2009 in Medical Physics and Biomedical Engineering, 7-12 September 2009, Munich, Germany, O. Dössel, W. C. Schlegel Eds., IFMBE Series, Vol. 25/VII, Springer-Verlag, Heidelberg, 2009, pp. 85-88.
• A. T. Giannitsis, B. P. Cahill, U. Pliquett, G. Gastrock, R. Land, T. Nacke, M. Min, D. Beckmann, (2008), “Improving Coplanar Electrodes for Moving Water Droplets”, Proceedings of 1st European Microfluidic Conference, 10-12 December 2008, Bologna, Italy, pp. 117.
• B. P. Cahill, A. T. Giannitsis, G. Gastrock, M. Min, D. Beckmann, (2008), “A Dynamic Electrowetting Simulation using the Level-Set Method”, Proceedings of Comsol International Conference, 4-6 November 2008, Hannover, Germany, pp. 534-536.
• B. P. Cahill, A. T. Giannitsis, R. Land, G. Gastrock, U. Pliquett, T. Nacke, M. Min, D. Beckmann, (2008), “Optimization of electrowetting electrodes: analysis of the leakage current characteristics of various dielectric layers”, Proceedings of 11th International Biennial Baltic Electronics Conference, 6-8 October 2008, Tallinn, Estonia, pp. 79-82, IEEE Xplore.
• B. P. Cahill, A. T. Giannitsis, U. Pliquett, T. Nacke, G. Gastrock, R. Land, M. Min, D. Beckmann, (2008), “Electrowetting as a tool for droplet actuation: Electrode Design and Simulation”, Proceedings of 14th Colloquium Heiligenstadt in Technical Systems for Life Sciences, 22-24 September 2008, Heiligenstadt, Germany, pp. 433-442.
• A. T. Giannitsis, B. P. Cahill, T. Nacke, M. Min, U. Pliquett, U. Klingebiel, A. Barthel, R. Land, G. Gastrock, D. Beckmann, (2008), “Chip design for microfluidic bioimpedance measurement”, Proceedings of 14th Colloquium Heiligenstadt in Technical Systems for Life Sciences, 22-24 September 2008, Heiligenstadt, Germany, pp. 423-432.
• B. P. Cahill, A. T Giannitsis, R. Land, G. Gastrock, U. Pliquett, T. Nacke, M. Min, D. Beckmann, (2008), “Selection of Coating Materials for an Electrowetting Chip based on Leakage Current Measurement”, Proceedings of 22nd Eurosensors 2008 Conference, 7-10 September 2008, Dresden, Germany, pp. 1607-1610.
• B. P. Cahill, A. T. Giannitsis, R. Land, G. Gastrock, U. Pliquett, T. Nacke, M. Min, D. Beckmann, (2008), “Electrowetting as a tool for the actuation of nanoliter-scale bioreactors”, Proceedings of Detection with and in Biosystems Workshop, 10 April 2008, Leipzig, Germany.
• A. T. Giannitsis, U. Pliquett, T. Nacke, G. Gastrock, R. Land, A. Barthel, D. Frense, M. Min, D. Beckmann, (2008), “Electroactuation of water droplets”, Proceedings of 4th International Workshop in Chemical and Biological Micro Laboratory Technology, 26-28 February 2008, Ilmenau, Germany.
• A. T. Giannitsis, B. P. Cahill, U. Pliquett, G. Gastrock, R. Land, T. Nacke, M. Min, D. Beckmann, (2008), “Optimisation of Electrodes for Actuating Water Droplets”, Proceedings of 22nd Eurosensors 2008 Conference, 7-10 September 2008, Dresden, Germany, pp. 513-516.
• O. Ayala-Valenzuela, J. Matutes-Aquino, R.Betancourt-Galindo, O. Rodriguez Fernandez, A.T. Giannitsis, P.C. Fannin, (2004), “Magnetite-cobalt ferrite nanoparticles for kerosene-based magnetic fluids”, Proceedings of Nanomag 2004, 15-19 November, 2004, Havana, Cuba.
• O. Ayala, R. Betancourt, J.A. Matutes, O.S. Rodriguez, A.T. Giannitsis, D.C. Fannin, (2004), “Synthesis and complex magnetic susceptibility characterization of magnetic fluids in different liquid carriers”, Proceedings of Magnetic Materials Conference, 8-12 November, 2004, Jacksonville, Florida, USA.
• M. Timko, P. Kopcansky, M. Koneracka, A. Skumiel, M. Labowski, A. Jozefczak, D. Bica, O. Balau, L.Vekas, P.C. Fannin, A.T. Giannitsis, (2001), “The comparative study of particle size distribution in magnetic fluids”, Proceedings of CSMAG 01: 11th Czech and Slovak Conference on Magnetism, 20-23 August, 2001, Kosice, Slovakia.
• P.C. Fannin, S.W. Charles, R.W. Chantrell, A.T. Giannitsis, (2001), “Studies of the effect of polarising field and particle interactions on the resonant frequency of magnetic nano-particles in colloidal suspensions”, Proceedings of 9th International Conference on Magnetic Fluids (ICMF9), 23-27 July 2001, Bremen, Germany.
• P.C. Fannin, Y.L. Raikher, A.T. Giannitsis, S.W. Charles, (2001), “Investigation of the influence which material parameter have on the signal to noise ratio of nano-particles”, Proceedings of 9th International Conference on Magnetic Fluids (ICMF9), 23-27 July 2001, Bremen, Germany.
• P.C. Fannin, S.W. Charles, D. Vincent, A.T. Giannitsis, (2001), “Measurement of the high-frequency complex permittivity and apparent conductivity of magnetic fluids”, Proceedings of 9th International Conference on Magnetic Fluids (ICMF9), 23-27 July 2001, Bremen, Germany.
• P.C. Fannin, T.S. Perova, M. Nolan, A.T. Giannitsis, R.A. Moore, (2000), “Dielectric properties of thin films formed on silicon”, Proceedings of 3rd International Conference on Materials for Microelectronics, 16-17 October 2000, Dublin, Ireland, pp. 259-262.

Conferences:

• Leiden Academic Center for Drug Research (LACDR) spring symposium, 24 May 2016, Leiden, Netherlands.
• Biotechnology based Ecologically Balanced Sustainable Industrial Consortium (BE-Basic) symposium, 31 March-1 April 2015, Noordwijkerhout, Netherlands.
• Biotechnology based Ecologically Balanced Sustainable Industrial Consortium (Be-Basic) Foundation Annual Meeting Flagship 1, 20 November 2014, Wagenigen, Netherlands.
• 15th International Conference of Electronics, 17-19 May 2011, Kaunas, Lithuania.
• 1st European Conference on Microfluidics, 10-12 December 2008, Bologna, Italy.
• Comsol Conference, 4-6 November 2008, Hannover, Germany.
• 22ndEurosensors Conference, 7-10 September 2008, Dresden, Germany.
• 14th Colloquium Heiligenstadt on Technical Systems for Life Sciences, 22-24 September 2008, Heilbad-Heiligenstadt, Germany.
• 4th International Workshop on Chemical and Biological Micro Laboratory Technology, 26-28 February 2008, Ilmenau, Germany.
• 9th International Conference on Magnetic Fluids, 23-27 July 2001, Bremen, Germany.
• 3rd International Conference on Materials for Microelectronics, 16-17 October 2000, Dublin, Ireland.