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首页> 外文期刊>Advanced Functional Materials >Reactive Imprint Lithography: Combined Topographical Patterning and Chemical Surface Functionalization of Polystyrene-block-poly(tert-butyl acrylate) Films
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Reactive Imprint Lithography: Combined Topographical Patterning and Chemical Surface Functionalization of Polystyrene-block-poly(tert-butyl acrylate) Films

机译：反应压印平版印刷术：聚苯乙烯嵌段聚（丙烯酸叔丁酯）薄膜的组合形貌图案化和化学表面功能化

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摘要

Here, reactive imprint lithography (RIL) is introduced as a new, one-step lithographic tool for the fabrication of large-area topographically patterned, chemically activated polymer platforms. Films of polystyrene-block-poly(tert-butyl acrylate) (PS-b-PtBA) are imprinted with PDMS master stamps at temperatures above the corresponding glass transition and chemical deprotection temperatures to yield structured films with exposed carboxylic acid and anhydride groups. Faithful pattern transfer is confirmed by AFM analyses. Transmission-mode FTIR spectra shows a conversion of over 95% of the tert-butyl ester groups after RIL at 230 ℃ for 5 minutes and a significantly reduced conversion to anhydride compared to thermolysis of neat films with free surfaces in air or nitrogen. An enrichment of the surface layer in PS is detected by angle-resolved X-ray photoelectron spectroscopy (XPS). In order to demonstrate application potentials of the activated platforms, a 7 nm ± 1 nm thick NH_2-terminated PEC layer (grafting density of 0.9 chains nm~(-2)) is covalently grafted to RIL-activated substrates. This layer reduces the non-specific adsorption (NSA) of bovine serum albumin by 95% to a residual mass coverage of 9.1 ±2.9ng cm~(-2). As shown by these examples, RIL comprises an attractive complementary approach to produce bio-reactive polymer surfaces with topographic patterns in a one-step process.
机译：在这里，反应压印光刻（RIL）作为一种新的一步式光刻工具被引入，用于制造大面积的地形图案化，化学活化的聚合物平台。在高于相应的玻璃化转变温度和化学脱保护温度的温度下，用PDMS母模压印聚苯乙烯嵌段聚（丙烯酸叔丁酯）（PS-b-PtBA）薄膜，以生成具有暴露的羧酸和酸酐基团的结构化薄膜。通过AFM分析证实了忠实的模式转移。透射模式FTIR光谱显示，与在空气或氮气中具有自由表面的纯净膜进行热解相比，RIL在230℃下5分钟后，超过95％的叔丁酯基团发生了转化，并且向酸酐的转化率显着降低。通过角分辨X射线光电子能谱法（XPS）检测PS中表面层的富集。为了证明活化平台的应用潜力，将7 nm±1 nm厚的NH_2封端的PEC层（接枝密度为0.9链nm〜（-2））共价接枝到RIL活化的底物上。该层将牛血清白蛋白的非特异性吸附（NSA）降低了95％，残留质量覆盖率为9.1±2.9ng cm〜（-2）。如这些示例所示，RIL包含一种有吸引力的互补方法，可在一步过程中生成具有地形图案的生物反应性聚合物表面。

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  • 来源
    《Advanced Functional Materials》 |2010年第3期|460-468|共9页
  • 作者

    Joost Duvigneau; Stijn Cornelissen; Nuria Bardaji Valls; Holger Schoenherr; G. Julius Vancso;

  • 作者单位

    Department of Materials Science and Technology of Polymers University of Twente MESA~+ Institute for Nanotechnology Postbus 217, 7500 AE Enschede (The Netherlands);

    Department of Materials Science and Technology of Polymers University of Twente MESA~+ Institute for Nanotechnology Postbus 217, 7500 AE Enschede (The Netherlands);

    Department of Materials Science and Technology of Polymers University of Twente MESA~+ Institute for Nanotechnology Postbus 217, 7500 AE Enschede (The Netherlands);

    Department of Materials Science and Technology of Polymers University of Twente MESA~+ Institute for Nanotechnology Postbus 217, 7500 AE Enschede (The Netherlands) Department of Physical Chemistry, University of Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen (Germany);

    Department of Materials Science and Technology of Polymers University of Twente MESA~+ Institute for Nanotechnology Postbus 217, 7500 AE Enschede (The Netherlands);

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