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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology



Thursday, 21 March 2019
(at 13:00 in room 115, Hallwachsstr. 3)
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Nanostructured surfaces enable unique properties: examples of biomedical devices

Dr. Giovanni Marinaro

Department of Physics
TU Dresden
   






The first part of the talk will focus on modelling and applications of nanostructures surfaces supporting aqueous droplets in a quasi contact-free (Cassie-Baxter) state. Such droplets provide wall-free microfluidic environments for dissolved and colloidal biological materials allowing studying self- assembly and conformational changes during evaporation by X-ray scattering and complementary techniques. [1] The evaporation of droplets on SHSs is often associated with the transition from Wenzel to Cassie state but while the evaporation of aqueous droplets can be well described analytically [2] or by simulations, our understanding of the microfluidic environment and the induced flow in evaporating droplets containing solutes is still quite limited. Our current work addresses this topic by combining particle image velocimetry (PIV) and simulations. The second part of the talk will focus on multi-segmented arrays of nanorods. The bottom-up approach is often used in nanoscience to realize nanofeatures due to the cheap and simple method. Furthermore, the combination of high surface and nanoshapes in these devices offers the possibility of different biomedical applications. Porous silicon and porous alumina are realized with this method and can be utilized as scaffold to study the mechanical interactions between nanofeatures and cells [3] but also as template for nanofabricating arrays of nanorods, nanowires, nanotubes and nanocones for molecular detection [4]. After a general overview on the topic, recent results from Surface- enhanced Raman Spectroscopy and from the studies of electrodeposition of copper on a conically shaped electrode in a magnetic field will be presented.

[1] G. Marinaro, A. Accardo, N. Benseny-Cases, M. Burghammer, H. Castillo-Michel, S. Dante, F. De Angelis, E. Di Cola, E. Di Fabrizio, C. Hauser, C. Riekel. “Probing droplets with biological colloidal suspensions on smart surfaces by synchrotron radiation micro- and nano- beams”. Optics and Lasers in Engineering, 76, 57-63, 2016; [2] Y. O. Popov. “Evaporative deposition patterns: spatial dimensions of the deposits”. Phys. Rev. E, 71, 036313, 2005 ; [3] G. Marinaro, R. La Rocca, A. Toma, M. Barberio, L. Cancedda, E. Di Fabrizio, P.Decuzzi, F. Gentile,“Networks of Neuroblastoma Clls on Macro-porous Silicon Substrates Reveal a Small World Topology”. Integrative Biology, 7, 2, 184-197, 2015; [4] G. Marinaro, G. Das, A. Giugni, M. Allione, B. Torre, P. Candeloro, J. Kosel, E. Di Fabrizio. “Plasmonic Nanowires for Wide Wavelength Molecular Sensing”. MDPI Materials, 11(5), 827, 2018;

Announcement (pdf)


Invited by G. Cuniberti

Within the nanoSeminar

last modified: 2021.03.17 Wed
author: webadmin

contact
Prof. Dr. Gianaurelio Cuniberti
secretariat:
Ms Sylvi Katzarow
phone: +49 (0)351 463-31420
fax: +49 (0)351 463-31422
office.nano@tu-dresden.de
postal address:
Institute for Materials Science
TU Dresden
01062 Dresden, Germany
visitors and courier address:
HAL building
TU Dresden
Hallwachsstr. 3
01069 Dresden, Germany
Max Bergmann Center
TU Dresden
Budapester Str. 27
01069 Dresden, Germany