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Design of a colorimetric sensing platform using reflection mode plasmonic colour filters

机译:使用反射模式等离子滤色器的比色传感平台设计

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Plasmonic nano structures fabricated using inexpensive and abundant aluminum metal shows intense narrow reflection peaks with strong response to the external stimuli, provides a simple yet powerful detection mechanism that is well suited for the development of low cost and low power sensors, such as colorimetric sensors, which transduces external stimuli or environmental changes in to visible colour changes. Such low cost and disposable sensors have huge demands in the point-of-care and home health care diagnostic applications. We present the design of a colorimetric sensing platform based on reflection mode plasmonic colour filters on both silicon and glass substrate, which demonstrate a sharp colour change for varying ambient refractive index. The sensor is essentially a plasmonic metamatenal in which the aluminum square plate hovering on a PMMA nano pillar in the background of a perforated aluminum reflector forms the unit cell which is arranged periodically in a 2D square lattice. The meta-surface has two distinct absorption peaks in the visible region leaving a strong reflection band, which strongly responds to the ambient refractive index change, provides a means for the realization of low cost colorimetric sensing platform.
机译:使用廉价且丰富的铝金属制作的等离子纳米结构显示出强烈的窄反射峰,对外部刺激具有强烈的响应,提供了一种简单而强大的检测机制,非常适合开发低成本和低功率传感器,例如比色传感器,将外部刺激或环境变化转换为可见的颜色变化。这种低成本且一次性的传感器在即时医疗和家庭保健诊断应用中有着巨大的需求。我们提出了基于硅和玻璃基板上的反射模式等离激元彩色滤光片的比色传感平台的设计,该滤光片展示了在变化的环境折射率下的急剧颜色变化。传感器本质上是等离子激元,其中在穿孔铝反射器背景下盘旋在PMMA纳米柱上的铝方板形成单位晶格,该单位晶格定期排列在2D方格中。超颖表面在可见光区域有两个不同的吸收峰,留下一个很强的反射带,强烈响应环境折射率的变化,为实现低成本比色传感平台提供了一种手段。

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