\"Optimization of Microfluidic Systems for IRMS long term measurement\" (Articolo in rivista)

Type
Label
  • \"Optimization of Microfluidic Systems for IRMS long term measurement\" (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.mee.2012.05.049 (literal)
Alternative label
  • G. Grenci, G. Birarda, E. Mitri, L. Businaro, S. Pacor, L. Vaccari, M. Tormen (2012)
    "Optimization of Microfluidic Systems for IRMS long term measurement"
    in Microelectronic engineering
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G. Grenci, G. Birarda, E. Mitri, L. Businaro, S. Pacor, L. Vaccari, M. Tormen (literal)
Pagina inizio
  • 698 (literal)
Pagina fine
  • 702 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 98 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR IOM, TASC Lab, I-34149 Trieste, Italy; Elettra Synchrotron Light Lab, I-34149 Trieste, Italy; Univ. Trieste, Trieste, Italy; CNR IFN, I-00156 Rome, Italy; Univ. Trieste, Dept Life Sci, I-34127 Trieste, Italy (literal)
Titolo
  • \"Optimization of Microfluidic Systems for IRMS long term measurement\" (literal)
Abstract
  • Infrared Microspectroscopy (IRMS) has been proposed as a powerful diagnostic tool in biology, due to the rich molecular, structural and conformational information contained in IR spectra of cells and tissues. In particular, IRMS of live cells in microfluidic devices has to cope with the strong water absorption in the medium infrared spectral region and the scarce knowledge about fabrication protocols suitable for microstructuring infrared-transparent materials. Based on these motivations we are developing and testing a class of microfluidic devices consisting of a patterned photoresist sandwiched between two CaF2 optical windows.In this paper we propose solutions to a few specific issues, namely, (i) the poor resist adhesion during micro-fabrication processes due to the low surface energy of CaF2, (ii) the potentially harmful effects of CaF2 dissolution on interesting cellular lines (such as neurons or stem cells), (iii) the sealing of the devices.Specifically, we modified the surface properties of CaF2 substrates by sputtering a thin layer of Si, as to obtain the following advantages: (a) all lithographic steps can be performed as if they were carried out on silicon wafers; (b) the chemical functionalization and nanostructuring of the surface in contact with cells can be obtained by usual protocols used for Si; (c) the deposited silicon separates living cells and their environment from CaF2. A device sealing process is discussed, based on a polymer bonding protocol, in order to tune the content of residual solvent. Finally, we present IR hyperspectral images acquired on MCF-7 living cells, cultured inside our devices for 48 h. (literal)
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