Electric-field enhancement of molecularly imprinted sol-gel-coated Au nano-urchin sensors for vapor detection of plant biomarkers
Electric-field enhancement of molecularly imprinted sol-gel-coated Au nano-urchin sensors for vapor detection of plant biomarkers
复制标题
分子印迹溶胶凝胶涂层金纳米海胆传感器的电场增强用于植物生物标志物的蒸气检测
DOI：
10.1039/c9tc05522c
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发表时间：
2020-01-07
影响因子：
6.4
通讯作者：
Hayashi, Kenshi
中科院分区：
文献类型：
--
作者：
Chen, Bin;Liu, Chuanjun;Hayashi, Kenshi
植物挥发性有机化合物（VOCs）的检测为农业作物生长实时监测提供了新的途径。本文合成了具有分枝尖端的金（Au）纳米海胆，并将其沉积在密度可控的玻片上，以产生增强的电子热点。研究了载玻片的折射率（RI）传感能力与纳米海胆密度的关系。将分子印迹溶胶-凝胶（MISG）溶液自旋涂覆在具有最佳RI传感能力的载玻片上，形成MISG@Au纳米海胆传感器。开发了四种MISGs，用于检测典型的植物生物标志物VOCs：顺式茉莉素、柠檬烯、α -蒎烯和γ -萜烯。归一化反应表明MISG@Au纳米海胆传感器对相应模板萜烯具有选择性。根据主成分分析（PCA），吸收光谱中的两个峰对萜烯的检测和识别都有必要的作用，这是由于金纳米海胆产生的热点及其耦合作用所致。
Detection of plant volatile organic compounds (VOCs) provides a new approach for real-time, on-field crop growth monitoring in agriculture. Gold (Au) nano-urchins with branched tips were synthesized and deposited on glass slides with controlled densities to generate enhanced electronic hot spots. The refractive index (RI) sensing capability of the slides was investigated as a function of nano-urchin density. A molecularly imprinted sol-gel (MISG) solution was spin-coated on the slide having the optimum RI sensing capability to form the MISG@Au nano-urchin sensors. Four MISGs were developed for the detection of typical plant biomarker VOCs: cis-jasmone, limonene, alpha-pinene, and gamma-terpinene. The normalized response indicated that selectivity of the MISG@Au nano-urchin sensors to the corresponding template terpenes was generated. According to the principal component analysis (PCA), both of the peaks in the absorption spectrum took necessary effects on terpene detection and discrimination, which was attributed to the hot spots generated by the Au nano-urchins and their coupling effects.