Enhancement of NO2 gas detection in hybrid silver nanoparticles-phthalocyanine thin films

5th International Conference of Photonics and Information Optics

Zasedatelev, A.V.^1,2 ; Krichevsky, D.M.^1,2 ; Zelenskiy, Yu M^1 ; Tolbin, A Yu^3 ; Krasovskii, V.I.^1,2 ; Karpo, A.B.^2 ; Tomilova, L.G.^3,4

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, 31 Kashirskoe shosse, Moscow

115409, Russia^1

Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilov Str. 38, Moscow

119991, Russia^2

Institute of Physiologically Active Compounds, Russian Academy of Sciences, Chernogolovka, Moscow region

142432, Russia^3

Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow

119991, Russia^4

关键词: Angular-modulation;    Charge transfer bands;    Kretschmann configuration;    Local surface plasmon resonances;    Optical response;    Plasmon resonances;    Plasmonic sensing;    Zinc phthalocyanines;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/737/1/012031/pdf
DOI  :  10.1088/1742-6596/737/1/012031

来源: IOP

【 摘 要 】

Phthalocyanine-functionalized plasmonic sensing systems are typically based on Kretschmann configuration. Such scheme of detection utilizes spectral or angular modulation of reflected light, which is induced by surface plasmon's excitation in the metal film on prism. Phthalocyanine's layer plays a role of analyte adsorber. In present paper we offer another approach to phthalocyanine-plasmonic sensing, where both local surface plasmon resonance and optical absorption of phthalocyanines are simultaneously detected. Hybrid Ag nanoparticles (AgNps) - low symmetrical A3B zinc phthalocyanine (ZnPc) thin films were prepared, and their NO2gas sensitive properties were examined. Since the plasmon resonance of AgNps was properly tuned to charge-transfer band of ZnPc-NO2complex, we found out more than two-fold increase of the optical response to NO2exposure in AgNps-ZnPc thin films compared to ZnPc films without AgNps.