Nanomechanical Recognition and Discrimination of Volatile Molecules by Au Nanocages Deposited on Membrane-Type Surface Stress Sensors
Izabela Osica , Antonio F.A.A. Melo , Filipe C. D. A. Lima , Kota Shiba , Gaku Imamura , Frank Nelson Crespilho , Jan Betlej , Krzysztof J. Kurzydowski , Genki Yoshikawa , Katsuhiko Ariga
AbstractHere, 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.
|Journal series||ACS Applied Nano Materials, ISSN 2574-0970|
|Publication size in sheets||0.5|
|Keywords in English||gold nanocages, membrane-type surface stress sensor, nanomechanical gas sensor, small volatile molecules discrimination, density functional theory calculations|
|Score||= 20.0, 30-06-2020, ArticleFromJournal|
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