Abstract : A urea biosensor based on pH-sensitive Sm(2)TiO(5) electrolyte-insulator-semiconductor (EIS) has be
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Abstract : A urea biosensor based on pH-sensitive Sm(2)TiO(5) electrolyte-insulator-semiconductor (EIS) has been described. We used X-ray diffraction Auger electron spectroscopy and atomic force microscopy to investigate the structural and morphological features of high-k Sm(2)TiO(5) sensing membranes that had been subjected to annealing at different temperatures. The EIS device incorporating a high-k Sm(2)TiO(5) sensing film that had been annealed at 900 degrees C exhibited good sensing characteristics including a high sensitivity of 60.5 mV/pH (in solutions from pH 2 to 12) a small hysteresis voltage of 2.72 mV (in the pH loop 7--gt4--gt7--gt10--gt7) and a low drift rate of 1.15 mV h(-1) (in the buffer solution at pH 7). The Sm(2)TiO(5) EIS device also showed a high selective response towards H(+). This improvement can be attributed to the small number of crystal defects and the large surface roughness. In addition the urea biosensor based on pH-sensitive EIS incorporating a Sm(2)TiO(5) sensing membrane annealed at 900 degrees C allowed the potentiometric analysis of urea at concentrations ranging from 0.1 to 32 mM with a sensitivity of 72.85 mV/purea.Copyright 2010 Elsevier B.V. All rights reserved.PMID 20510905 PubMed - indexed for MEDLINEPublication Types MeSH Terms SubstancesPublication Types Research Support Non-U.S. GovtMeSH TermsBiosensing Techniques*/methodsElectrolytes/chemistryHot TemperatureHydrogen-Ion ConcentrationPotentiometrySamarium/chemistrySemiconductors/instrumentationTitanium/chemistryUrea*/analysisSubstancesElectrolytesUreaSamariumTitaniumLinkOut - more resourcesFull Text SourcesElsevier ScienceEBSCOOhioLINK Electronic Journal CenterSwets Information ServicesMolecular Biology DatabasesTITANIUM - HSDBUREA - HSDB Supplemental Content Related citations High dielectric constant PrY(x)O(y) sensing films electrolyte-insulator-semiconductor pH-sensor for the detection of urea. Anal Chim Acta. 2009 High dielectric constant PrY(x)O(y) sensing films electrolyte-insulator-semiconductor pH-sensor for the detection of urea.Wu MH Lee CD Pan TM. Anal Chim Acta. 2009 Sep 28 651(1)36-41. Epub 2009 Aug 18. Structural properties and sensing performance of high-k Nd2TiO5 thin layer-based electrolyte-insulator-semiconductor for pH detection and urea biosensing. Biosens Bioelectron. 2009 Structural properties and sensing performance of high-k Nd2TiO5 thin layer-based electrolyte-insulator-semiconductor for pH detection and urea biosensing.Pan TM Lin JC Wu MH Lai CS. Biosens Bioelectron. 2009 May 15 24(9)2864-70. Epub 2009 Feb 27. Structural and sensing properties of high-k PrTiO3 sensing membranes for pH-ISFET applications. IEEE Trans Biomed Eng. 2009 Structural and sensing properties of high-k PrTiO3 sensing membranes for pH-ISFET applications.Pan TM Liao KM. IEEE Trans Biomed Eng. 2009 Feb 56(2)471-6. Epub 2008 Oct 21. Label-free detection of DNA using novel organic-based electrolyte-insulator-semiconductor. Biosens Bioelectron. 2010 Label-free detection of DNA using novel organic-based electrolyte-insulator-semiconductor.Lin TW Kekuda D Chu CW. 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Substance (MeSH Keyword) PubChem chemical substance (submitted) records that are classified under the same Medical Subject Headings (MeSH) controlled vocabulary as the current articles. Recent activity Clear Turn Off Turn On A urea biosensor based on pH-sensitive Sm2TiO5 electrolyte-insulator-semiconduct... A urea biosensor based on pH-sensitive Sm2TiO5 electrolyte-insulator-semiconductor.Anal Chim Acta. 2010 Jun 11 669(1-2)68-74. Epub 2010 May 13 . PubMed Your browsing activity is empty. Activity recording is turned off. Turn recording back on See more... 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