1 Ocak 2015 Dergi makalesi Açık Erişim

Eryurek, Mustafa; Karadag, Yasin; Tasaltin, Nevin; Kilinc, Necmettin; Kiraz, Alper

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  <dc:creator>Eryurek, Mustafa</dc:creator>
  <dc:creator>Karadag, Yasin</dc:creator>
  <dc:creator>Tasaltin, Nevin</dc:creator>
  <dc:creator>Kilinc, Necmettin</dc:creator>
  <dc:creator>Kiraz, Alper</dc:creator>
  <dc:date>2015-01-01</dc:date>
  <dc:description>We report an integrated optical sensor of hydrogen (H-2) gas employing an SU-8 polymer microdisk resonator coated with a palladium (Pd) layer and coupled to a single-mode optical waveguide. The sensing mechanism relies on the expansion in the Pd lattice due to palladium hydride formation in the presence of H-2. Strain induced in the microresonator then causes a red shift of the spectral positions of the resonator whispering gallery modes (WGMs) which is monitored using a tunable laser coupled to the waveguide. H-2 concentrations below the flammable limit (4%) down to 0.3% could be detected in nitrogen atmosphere at room temperature. For H-2 concentrations between 0.3 and 1%, WGM spectral positions shifted linearly with H-2 concentration at a rate of 32 pm/% H-2. Average response time of the devices was measured to be 50 s for 1% H-2. The proposed device concept can also be used to detect different chemical gases by using appropriate sensing layers. (C) 2015 Elsevier B.V. All rights reserved.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/90763</dc:identifier>
  <dc:identifier>oai:zenodo.org:90763</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>SENSORS AND ACTUATORS B-CHEMICAL 212 78-83</dc:source>
  <dc:title>Optical sensor for hydrogen gas based on a palladium-coated polymer microresonator</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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