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Recerca en electro- hidrodinamica i nano-fluidica* Joan Rosell FeT group; DEQ; ETSEQ *Please read notes (in English and Catalan) while reviewing this file.

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Presentation on theme: "Recerca en electro- hidrodinamica i nano-fluidica* Joan Rosell FeT group; DEQ; ETSEQ *Please read notes (in English and Catalan) while reviewing this file."— Presentation transcript:

1 Recerca en electro- hidrodinamica i nano-fluidica* Joan Rosell FeT group; DEQ; ETSEQ *Please read notes (in English and Catalan) while reviewing this file

2 100 nm Capillary tube held at high voltage Taylor cone (liquid meniscus) Micro-jet Electrospray close-up of cone-jet tip 0.1mM LiCl in ethylene glycol ( Fdez.de la Mora et al, J. Fluid Mech 260: , 1994 ) >> Electro-hydrodynamic cone-jets Liquid flow “…the diameter is less than 3 nm” G. Benassayag, P. Sudraud, B. Jouffrey, Ultramicroscopy 16: 1-8, 1985

3 Gomez and Tang, Phys Fluids 6: , 1994 Steady cone-jet Volatile spray Coulomb explosion

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5 Cytochrome C by ESI-MS J. B. Fenn, M. Mann, C. K. Meng. S. F. Wong, C. M. Whitehouse, "Electrospray Ionization for Mass Spectrometry of Large Biomolecules," Science 246, 64 (1989).

6 >> Motion studies of electrified drops - results summary End plate Droplet H.V.power supply Oscilloscope Time (1/30 s) Sealed capillary Time (1/10 s)

7 Electrospinning PVA HVDC Syringe Pump High voltage DC supply Syringe Needle Rotating and Translating --Courtesy of D. Zhan ( Gary E. Wnek)--

8 Kenawy et al., Biomaterials, 24, (2003) Fibroblast cells interacting with the EVOH mat after 7 days in culture. EVOH - poly(ethylene-co-vinyl alcohol) --Courtesy of D. Zhan ( Gary E. Wnek)--

9 >> General scope - ICREA proposal Development of aerosol techniques for the generation of nano- structured materials, with emphasis on EHD micro-flows. Nano-structured fibrous materials by electro-spinning (ESP) Colloid thrusters for micro-satellites Electro-hydrodynamics, Electro-hydrodynamic instability of liquids, Rayleigh breakup of droplets, Electrospray ion formation

10 >> Marie Curie Int’l Grant Nano-electro-hydrodynamic flows generating droplets –Projecte europeu –En vies de co-finançament –Inicia la recerca a Catalunya en aquest camp –Mètodes: experimentals (mesures de ogtes) COMBINATS AMB la computació d’aquests “nano-fluxos” invisibles

11 Investigadors Joan Rosell, (PI), investigador ICREA Joan Herrero, professor titular Dolors Puigjaner; professora titular Francesc Giralt, catedràtic Dolors Salvatierra, investigadora Ramon y Cajal Sergi Paredes, Becari


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