Nanomechanical Recognition and Discrimination of Volatile Molecules by Au Nanocages Deposited on Membrane-Type Surface Stress Sensors

Author(s)

Osica, Izabela ^{[1, 2]} ; Melo, Antonio F. A. A. ^{[3, 4]} ; Lima, Filipe C. D. A. ^[5] ; Shiba, Kota ^{[1, 6]} ; Imamura, Gaku ^{[1, 6]} ; Crespilho, Frank N. ^[3] ; Betlej, Jan ^[2] ; Kurzydowski, Krzysztof J. ^[7] ; Yoshikawa, Genki ^{[1, 6, 8]} ; Ariga, Katsuhiko ^{[1, 9]}

Affiliation

^[1] Natl Inst Mat Sci WPI NIMS, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044 - Japan

^[2] Warsaw Univ Technol, Fac Mat Sci & Engn, PL-02507 Warsaw - Poland

^[3] Univ Sao Paulo, Sao Carlos Inst Chem IQSC, BR-13560970 Sao Carlos, SP - Brazil

^[4] Fed Inst Educ Sci & Technol Piaui, BR-64000040 Teresina, PI - Brazil

^[5] Fed Inst Educ Sci & Technol Sao Paulo, BR-15991502 Matao, SP - Brazil

^[6] Natl Inst Mat Sci NIMS, Ctr Funct Sensor & Actuator CFSN, Tsukuba, Ibaraki 3050044 - Japan

^[7] Bialystok Tech Univ, Fac Mech Engn, PL-15351 Bialystok - Poland

^[8] Univ Tsukuba, Grad Sch Pure & Appl Sci, Mat Sci & Engn, Tsukuba, Ibaraki 3058571 - Japan

^[9] Univ Tokyo, Grad Sch Frontier Sci, Dept Adv Mat Sci, Kashiwa, Chiba 2778561 - Japan

• Document type: Journal article
• Source: ACS APPLIED NANO MATERIALS; v. 3, n. 5, p. 4061-4068, MAY 22 2020.
• Web of Science Citations: 0

Abstract

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. (AU)

• FAPESP's process: 19/15333-1 - Bio-photo-electrochemical hybrid cells for solar energy conversion
• Grantee: Frank Nelson Crespilho
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/12053-8 - High performance electrodes applied in organic batteries and in biofuel cell
• Grantee: Frank Nelson Crespilho
• Support Opportunities: Regular Research Grants