Trojanowska Anna, Pazos-Perez Nicolas, Panisello Cinta, Gumi Tania, Guerrini Luca, Alvarez-Puebla Ramon A
Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans, 26, 43007 Tarragona, Spain; Centro de Tecnologia Quimica de Cataluña and Universitat Rovira i Virgili, Carrer de Marcel•lí Domingo s/n, 43007 Tarragona, Spain.
Centro de Tecnologia Quimica de Cataluña and Universitat Rovira i Virgili, Carrer de Marcel•lí Domingo s/n, 43007 Tarragona, Spain; Medcom Advance SA, Viladecans Business Park - Edificio Brasil, Bertran i Musitu 83-85, 08840 Viladecans - Barcelona, Spain.
J Colloid Interface Sci. 2015 Dec 15;460:128-34. doi: 10.1016/j.jcis.2015.08.047. Epub 2015 Aug 24.
Hybrid composites are known to add functionality to plasmonic nanomaterials. Although these substrates can be produced by common synthetic methods, the percentage of metal loaded into the functional material is usually small. Herein, we exploit a phase inversion precipitation method to incorporate large amounts of silver nanoparticles inside the polymeric matrix of polysulfone microbeads. The composite material combines the high SERS activity resulting from the plasmonic coupling of highly interacting nanoparticles and the ability to accumulate analytes of the polysulfone porous support. This allows for the quantitative SERS detection down to the nanomolar level, with a liner response that extends over an impressive concentration range of five orders of magnitude.
已知混合复合材料可为等离子体纳米材料增添功能。尽管这些基底可以通过常见的合成方法制备，但负载到功能材料中的金属百分比通常较小。在此，我们利用相转化沉淀法将大量银纳米颗粒掺入聚砜微珠的聚合物基质中。该复合材料结合了由高度相互作用的纳米颗粒的等离子体耦合产生的高表面增强拉曼散射（SERS）活性以及聚砜多孔载体积累分析物的能力。这使得能够进行低至纳摩尔水平的定量SERS检测，其线性响应范围跨越令人印象深刻的五个数量级的浓度范围。
