Rational Design of Photonic Dust from Nanoporous Anodic Alumina Films: A Versatile Photonic Nanotool for Visual Sensing.
Rational Design of Photonic Dust from Nanoporous Anodic Alumina Films: A Versatile Photonic Nanotool for Visual Sensing.
复制标题
DOI：
10.1038/srep12893
复制
发表时间：
2015-08-06
影响因子：
4.6
通讯作者：
Losic D
中科院分区：
文献类型：
--
作者：
Chen Y;Santos A;Wang Y;Kumeria T;Ho D;Li J;Wang C;Losic D
在此，我们提出了一个系统的研究的发展，优化和适用性的干涉彩色分布式布拉格反射器的基础上，纳米多孔阳极氧化铝（NAA-DBR）的形式的薄膜和纳米多孔微粒作为视觉/比色分析工具。首先，我们通过恒电流脉冲阳极氧化方法合成了一个完整的NAA-DBR调色板，其中电流密度以周期性的方式改变，以便深入设计所得到的光子薄膜的有效介质。NAA-DBR光子薄膜具有鲜艳的颜色，可以通过结构工程在紫外-可见-近红外光谱范围内进行调谐。其次，所得到的光子薄膜的有效介质进行了系统的评估，通过视觉分析和反射干涉光谱（RIfS），以建立最佳的纳米多孔平台，开发视觉/比色工具。然后，我们证明了NAA-DBR光子薄膜作为汞（II）离子视觉检测的化学选择性传感平台的适用性。最后，我们通过将NAA-DBR薄膜分解成纳米多孔微粒来产生一种新的纳米材料，即所谓的光子尘埃。由此产生的微粒（μP-NAA-DBR）显示出鲜艳的颜色，并且对有效介质的变化敏感，为开发用于广泛应用的先进光子纳米工具开辟了新的机会。
Herein, we present a systematic study on the development, optimisation and applicability of interferometrically coloured distributed Bragg reflectors based on nanoporous anodic alumina (NAA-DBRs) in the form of films and nanoporous microparticles as visual/colorimetric analytical tools. Firstly, we synthesise a complete palette of NAA-DBRs by galvanostatic pulse anodisation approach, in which the current density is altered in a periodic fashion in order to engineer the effective medium of the resulting photonic films in depth. NAA-DBR photonic films feature vivid colours that can be tuned across the UV-visible-NIR spectrum by structural engineering. Secondly, the effective medium of the resulting photonic films is assessed systematically by visual analysis and reflectometric interference spectroscopy (RIfS) in order to establish the most optimal nanoporous platforms to develop visual/colorimetric tools. Then, we demonstrate the applicability of NAA-DBR photonic films as a chemically selective sensing platform for visual detection of mercury(II) ions. Finally, we generate a new nanomaterial, so-called photonic dust, by breaking down NAA-DBRs films into nanoporous microparticles. The resulting microparticles (μP-NAA-DBRs) display vivid colours and are sensitive towards changes in their effective medium, opening new opportunities for developing advanced photonic nanotools for a broad range of applications.