Flexible SERS substrates were obtained by the photo-activated synthesis of silver nanoparticles in a thin (10–170 nm) layer of poly(acrylic acid) chemically grafted to the surface of a polypropylene fi lm. The plasmonic absorption and the SERS activity of the substrates were studied as a function of the thickness of the grafted layer for a fixed time of nanoparticle synthesis. The results indicate dense three-dimensional packing of plasmonic nanoparticles in the grafted polymer layer. The substrates have a storage-stable and surface-uniform SERS activity.

中文翻译：

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基于银纳米颗粒的柔性Sers-Active基底，该纳米颗粒生长在接枝到聚丙烯膜上的聚（丙烯酸）中

通过在化学接枝到聚丙烯膜表面的聚丙烯酸薄层（10-170 nm）中光活化合成银纳米颗粒，可以获得柔性SERS基板。对于固定时间的纳米颗粒合成，研究了基底的等离子体吸收和SERS活性与接枝层厚度的关系。结果表明在接枝的聚合物层中等离子体纳米颗粒的密集三维堆积。基材具有稳定的存储和表面均匀的SERS活性。