Patterning of spontaneous rolling thin polymer films for versatile microcapillaries

We investigate the spontaneous rolling of polydimethylsiloxane(PDMS) thin films and demonstrate the fabrication of capillaries with topographical and chemical patterns on the inner wall

Rémy Brossard

2017

Scholarcy highlights

  • Over the recent years, folding has been extensively used as a remarkable microfabrication method for the design of probes and microfluidic devices, leading to the emerging concept of lab-in-a-tube 1
  • Most studies reported in the literature focused on electrodes integration 13;27;28;29 but studies dealing with other kinds of patterning are scarce
  • The inner diameters of tubes is plotted as a function of total thickness of the bilayer in figure 2 for the different processes
  • Spontaneous curvature is induced in capped PDMS thin film by selective solvent swelling
  • That method is used as a nonlithographic mean to obtain self-rolled micro-capillaries with an inner diameter between 20 and 200 μm
  • The obtained diameter as a function of film thickness was optically measured for different solvent - chloroform and pentane - and capping PDMS oxide and chitosan
  • One parameter is only known in term of order of magnitude, the predictive ability of the model seems very satisfactory

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