A colorimetric sensor array for odour visualization
A colorimetric sensor array for odour visualization
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DOI：
10.1038/35021028
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发表时间：
2000-08-17
期刊：
影响因子：
64.8
通讯作者：
Suslick, KS
中科院分区：
文献类型：
--
作者：
Rakow, NA;Suslick, KS
基于阵列的蒸汽传感装置用于检测和区分化学上不同的分析物。这些系统-基于交叉响应传感器元件-旨在通过产生对每种气味物独特的复合响应来模仿哺乳动物嗅觉系统（1-3）。之前的工作集中在各种非特异性化学相互作用（4-11）上，以检测非配位有机蒸气。但最臭、最毒的化合物往往很容易与金属离子结合。在这里，我们报告了一个简单的光化学传感方法，利用金属卟啉染料阵列中诱导的颜色变化配体结合后，同时尽量减少对广泛的信号转导硬件的需要。固定化蒸汽传感金属卟啉染料库的化学选择性响应允许视觉识别广泛的连接（醇，胺，醚，膦，亚磷酸酯，硫醚和硫醇），甚至弱连接（芳烃，卤代烃和酮）蒸汽。水的几何相关长度），因此，一个纯粹的扩散大规模的行为的力量。因此，我们的结论是肯定适用于无序填料，如粘性土壤或沙堆。相比之下，对于非随机的特定情况下，纹理填料，偏置和长程相关的q-系列沿着力传输树可能会遇到，从而改变以前的纯扩散行为。
Array-based vapour-sensing devices are used to detect and differentiate between chemically diverse analytes. These systems- based on cross-responsive sensor elements-aim to mimic the mammalian olfactory system(1-3) by producing composite responses unique to each odorant. Previous work has concentrated on a variety of non-specific chemical interactions(4-11) to detect non-coordinating organic vapours. But the most odiferous, toxic compounds often bind readily to metal ions. Here we report a simple optical chemical sensing method that utilizes the colour change induced in an array of metalloporphyrin dyes upon ligand binding while minimizing the need for extensive signal transduction hardware. The chemoselective response of a library of immobilized vapour-sensing metalloporphyrin dyes permits the visual identification of a wide range of ligating (alcohols, amines, ethers, phosphines, phosphites, thioethers and thiols) and even weakly ligating (arenes, halocarbons and ketones) vapours. Water geometrical correlation length), and consequently a purely diffusive large-scale behaviour for the force. Therefore, we conclude that our results are certainly applicable to disordered packings such as cohesionless soils or sand piles. In contrast, for the particular case of non-random, textured packings, biased and long-range correlated q-series along the force transmission tree are likely to be encountered, thus altering the previous purely diffusive behaviour.