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First application of multilayer graphene cantilever for laser photoacoustic detection
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SYSNO ASEP 0482918 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název First application of multilayer graphene cantilever for laser photoacoustic detection Tvůrce(i) Suchánek, Jan (UFCH-W) RID, ORCID
Dostál, Michal (UFCH-W) RID, ORCID, SAI
Vlasáková, T. (CZ)
Janda, Pavel (UFCH-W) RID, ORCID
Klusáčková, Monika (UFCH-W) RID, ORCID
Kubát, Pavel (UFCH-W) RID, ORCID, SAI
Nevrlý, V. (CZ)
Bitala, P. (CZ)
Civiš, Svatopluk (UFCH-W) RID, ORCID, SAI
Zelinger, Zdeněk (UFCH-W) RID, ORCIDZdroj.dok. Measurement. - : Elsevier - ISSN 0263-2241
Roč. 101, APR 2017 (2017), s. 9-14Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Cantilever ; Multilayer graphene ; Photoacoustic detection ; Methanol detection Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP GA14-14696S GA ČR - Grantová agentura ČR LD14022 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000395216100002 EID SCOPUS 85009507860 DOI 10.1016/j.measurement.2017.01.011 Anotace The mechanical behaviours of multilayer graphene (MLG) membranes and cantilevers were investigated for the sensitive detection of acoustic waves in gases. The aim of this Work was to find sensors for laser photoacoustic spectroscopy with high sensitivity. The application of the MLG cantilever for photoacoustic detection was reported for the first time. MLG membranes and cantilevers were prepared from highly ordered pyrolytic graphite (HOPG) by multiple mechanical cleavages allowing simple adjustment of the membrane/cantilever thickness and relevant mechanical parameters. The MLG cantilevdr/membrane movements induced by pressure waves triggered by the absorption of the CO2 laser pulse in the gas-filled photoacoustic cell were detected by a He-Ne laser beam reflected from the cantilever/membrane to a position sensitive detector (optical microphone). The sensitivity of the MLG cantilevers for the photoacoustic detection of methanol vapours (testing gas) was more than one order of magnitude higher in comparison with a top class microphone (Bruel & Kjaer). The signal-to-noise ratio of 19, 61, and 70 together with the limits of detection of 0.75 ppm, 0.42 and 0.33 ppm were calculated for the condenser microphone, the MLG membrane, and the MLG cantilever, respectively. Additionally, the high sensitivity of both MLG elements for the photoacoustic detection is also promising thanks to the single layer graphene with very a small thickness on the nanometer scale. (C) 2017 Elsevier Ltd. All rights reserved. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2018
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