Sinusoidal surface-relief gratings (SRGs) formed by microphase separated photoresponsive poly(dimethylsiloxane)-block-poly(methyl acrylate-co-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.

通过微形成正弦表面起伏光栅（自力更生团体）隔开光敏聚（二甲基硅氧烷） -嵌段-聚（甲基丙烯酸酯-共-disperse红1丙烯酸酯）（PDMS- b -P（MA- CO -DR1A））链进行了研究。通过多步合成方法制备了不同的PDMS- b- P（MA- co- DR1A），该方法克服了合成DR1A染料含量高达50的定义明确的基于PDMS的嵌段共聚物（BCP）所固有的挑战重量％。正弦SRG（振幅≈5 nm，波数≈315 nm）干涉法刻在薄PDMS- b -P（MA- co对具有〜34nm的周期的面外圆柱结构的-DR1A）层进行了说明。可以将这类“双色”多尺度图案化表面设想为引导图案，以通过BCP特征的化学/图形-外延混合排列有效地引导BCP上层的自组装。