College of Sciences, Northeastern University, Shenyang 110819, P. R. China.
Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, D-01069 Dresden, Germany.
Nanoscale. 2017 Feb 2;9(5):1925-1933. doi: 10.1039/c6nr09631j.
For decades, plasmonic nanostructures have been used as important optical sensing platforms, however, the necessity of sensitive optical instruments for detection greatly limits their practical application. Herein, a multi-responsive naked eye plasmonic indicator has been prepared through introduction of a responsive polymer brush (PNIPAm) into the cavity of a Ag nanovolcano array (Ag NVA). According to the phase change of the PNIPAm brush under different external conditions, the as-prepared Ag NVA shows responsive monochromatic colors, which allow the Ag NVA to serve as a plasmonic indicator detected by the naked eye. Importantly, the as-prepared Ag NVA also possesses a rapid response rate as well as excellent repeatability, and is compatible with conventional micro-fabrication methods. All of these excellent features make the as-prepared Ag NVA an attractive candidate for future optical indicating and intelligent color display applications.
数十年来，等离子体纳米结构一直被用作重要的光学传感平台，然而，检测所需的灵敏光学仪器极大地限制了其实际应用。在此，通过将响应性聚合物刷（PNIPAm）引入到 Ag 纳米火山阵列（Ag NVA）的腔中，制备了一种多响应性裸眼等离子体指示剂。根据 PNIPAm 刷在不同外部条件下的相变化，所制备的 Ag NVA 表现出响应性的单色颜色，这使得 Ag NVA 可以作为裸眼检测的等离子体指示剂。重要的是，所制备的 Ag NVA 还具有快速的响应速度和优异的可重复性，并且与传统的微制造方法兼容。所有这些优异的特性使得所制备的 Ag NVA 成为未来光学指示和智能彩色显示应用的有吸引力的候选者。
