First application of multilayer graphene cantilever for laser photoacoustic detection

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00482918" target="_blank" >RIV/61388955:_____/17:00482918 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10372867 RIV/61989100:27200/17:86099752

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.measurement.2017.01.011" target="_blank" >http://dx.doi.org/10.1016/j.measurement.2017.01.011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.measurement.2017.01.011" target="_blank" >10.1016/j.measurement.2017.01.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

First application of multilayer graphene cantilever for laser photoacoustic detection

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

First application of multilayer graphene cantilever for laser photoacoustic detection

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Measurement

ISSN

0263-2241

e-ISSN

—

Svazek periodika

101

Číslo periodika v rámci svazku

APR 2017

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

9-14

Kód UT WoS článku

000395216100002

EID výsledku v databázi Scopus

2-s2.0-85009507860