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Surface relief gratings formed by microphase-separated disperse red 1 acrylate-containing diblock copolymers

Abstract : Sinusoidal surface-relief gratings (SRGs) formed by micro-phase separated photoresponsive polydimethylsiloxane-block-poly(methyl acrylate)-co-poly(disperse red 1 acrylate) (PDMS-b- P(MA-co-DR1A)) chains are investigated. Different PDMS-b-P(MA-co-DR1A) were prepared by a multi-step synthetic approach which overcomes the challenges inherent to the synthesis of well-defined PDMS-based block copolymers (BCPs) having a DR1A dye content up to 50 wt%. A sinusoidal SRG (amplitude » 5 nm, wavenumber » 315 nm) interferometrically inscribed onto a thin PDMS-b-P(MA-co-DR1A) layer exhibiting an out of- plane cylindrical structure with a period of ~34 nm is demonstrated. Such kind of “two-colored” multiscale patterned surfaces could be envisioned as guiding patterns to efficiently direct the self-assembly of a BCP upper-layer via a hybrid chemo-/grapho-epitaxial alignment of BCP features.
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https://hal.archives-ouvertes.fr/hal-01685087
Contributor : Eric Cloutet <>
Submitted on : Tuesday, January 16, 2018 - 9:50:26 AM
Last modification on : Tuesday, May 12, 2020 - 11:04:02 AM

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Mitica Cezar Spiridon, Karim Aissou, Muhammad Mumtaz, Cyril Brochon, Eric Cloutet, et al.. Surface relief gratings formed by microphase-separated disperse red 1 acrylate-containing diblock copolymers. Polymer, Elsevier, 2018, ⟨10.1016/j.polymer.2018.01.032⟩. ⟨hal-01685087⟩

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