Replication of nanoscale surface gratings via injection molding

Olga Muntada-López, Jordi Pina-Estany, Carles Colominas, Jordi Fraxedas, Francesc Pérez-Murano, Andres García-Granada

Research output: Indexed journal article Articlepeer-review

13 Citations (Web of Science)


Nanostructured gratings fabricated on silicon chips have been successfully transferred to polypropylene plastic parts by means of injection molding. Different sets of experiments were carried out along with a repeatability analysis in order to study the effect in the replication of process parameters such as maximum injection pressure, injection time, charge and polymer temperature, geometric factors such as width and separation between lines of the gratings and flow direction as well as demolding conditions. Among all factors, the one with a larger effect is the separation between consecutive trenches, which was studied in detail through Computational Fluid Dynamics simulations. In addition, a previously not reported sinking effect in the nanostructured area and a shrinking of the pattern period were characterized and simulated.

Translated title of the contributionReplication of nanoscale surface gratings via injection molding
Original languageEnglish
Pages (from-to)37-43
Number of pages7
JournalMicro and Nano Engineering
Publication statusPublished - May 2019


  • Computational fluid dynamics
  • Heat transfer
  • Nanostructured surfaces
  • Plastic injection molding


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