Nanomechanical Recognition and Discrimination of Volatile Molecules by Au Nanocages Deposited on Membrane-Type Surface Stress Sensors
Nanomechanical Recognition and Discrimination of Volatile Molecules by Au Nanocages Deposited on Membrane-Type Surface Stress Sensors
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DOI：
10.1021/acsanm.0c00115
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发表时间：
2020-05-22
影响因子：
5.9
通讯作者：
Ariga, Katsuhiko
中科院分区：
文献类型：
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作者：
Osica, Izabela;Melo, Antonio F. A. A.;Ariga, Katsuhiko
在这里，我们表明，金纳米笼（AuNCs）可以用作纳米机械膜型表面应力传感器（MSS）的受体材料。所制备的AuNCs-涂层的MSS（AuNCs_MSS）被成功地用于识别小的挥发性分子。每个AuNCs_MSS表现出对每个分析物的响应信号的特定模式，使得能够通过主成分分析（PCA）对化合物进行分组区分。在PCA图上应用分析物独特特征的等高线图使我们能够将极性识别为影响AuNCs_MSS响应的关键属性。此外，密度泛函理论（DFT）计算表明，角落和边缘的纳米笼发挥重要作用的结合能。
Here, we show that gold nanocages (AuNCs) can be used as receptor materials for nanomechanical membrane-type surface stress sensor (MSS). The fabricated AuNCs-coated MSS (AuNCs_MSS) was employed successfully for the recognition of small volatile molecules. Each AuNCs_MSS exhibited a specific pattern of the response signal to each analyte, enabling groupwise discrimination of the compounds by means of principal component analysis (PCA). The application of contour maps of analyte-distinctive features on the PCA plots allows us to recognize polarity as a key property that affects the AuNCs_MSS response. In addition, density functional theory (DFT) calculations suggest that corners and edges of the nanocages play important roles in binding energy.