Room temperature selective sensing of aligned Ni nanowires using impedance spectroscopy
Room temperature gas sensing behavior of arrayed one-dimensional (1D) nickel nanowires (Ni NWs) are investigated using impedance spectroscopy. Ni nanowires synthesized via electrochemical deposition method based on anodic aluminum oxide (AAO) templates. Their structural characterization verified by...
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| Veröffentlicht in: | Materials research express 2020-02, Vol.7 (2), p.25044 |
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| creator | Mohammadi, Masoumeh Fardindoost, Somayeh Iraji zad, Azam Almasi-Kashi, Mohammad |
| description | Room temperature gas sensing behavior of arrayed one-dimensional (1D) nickel nanowires (Ni NWs) are investigated using impedance spectroscopy. Ni nanowires synthesized via electrochemical deposition method based on anodic aluminum oxide (AAO) templates. Their structural characterization verified by scanning electron microscopy (SEM), x-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) analysis. Impedance spectroscopy as an essential technique utilized to understand the mechanism of gas interaction with the wires through the changes in their electronic behavior. Bode and Nyquist plots with the real and imaginary impedances are plotted versus frequency range of 500 Hz to 2 MHz at different relative humidity values (varying from 30% to 70%) and ethanol vapor concentrations (varying from 2 to 18 ppm). The equivalent circuits are proposed and simulated for impedance responses to both humidity and ethanol vapors. The impedance plots indicate the increase in resistance of the aligned nanowires at low frequencies by the adsorption of water and ethanol molecules. |
| doi_str_mv | 10.1088/2053-1591/ab66ac |
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Ni nanowires synthesized via electrochemical deposition method based on anodic aluminum oxide (AAO) templates. Their structural characterization verified by scanning electron microscopy (SEM), x-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) analysis. Impedance spectroscopy as an essential technique utilized to understand the mechanism of gas interaction with the wires through the changes in their electronic behavior. Bode and Nyquist plots with the real and imaginary impedances are plotted versus frequency range of 500 Hz to 2 MHz at different relative humidity values (varying from 30% to 70%) and ethanol vapor concentrations (varying from 2 to 18 ppm). The equivalent circuits are proposed and simulated for impedance responses to both humidity and ethanol vapors. The impedance plots indicate the increase in resistance of the aligned nanowires at low frequencies by the adsorption of water and ethanol molecules.</description><identifier>ISSN: 2053-1591</identifier><identifier>EISSN: 2053-1591</identifier><identifier>DOI: 10.1088/2053-1591/ab66ac</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Aluminum oxide ; anodic aluminum oxide ; Equivalent circuits ; Ethanol ; Fourier transforms ; Frequency ranges ; gas sensor ; Gas sensors ; hard anodization ; Humidity ; Impedance spectroscopy ; Infrared analysis ; Infrared spectroscopy ; Nanowires ; Nickel ; nickel nanowires ; Nyquist plots ; Relative humidity ; Room temperature ; Spectrum analysis ; Structural analysis</subject><ispartof>Materials research express, 2020-02, Vol.7 (2), p.25044</ispartof><rights>2020 The Author(s). Published by IOP Publishing Ltd</rights><rights>2020. 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Res. Express</addtitle><description>Room temperature gas sensing behavior of arrayed one-dimensional (1D) nickel nanowires (Ni NWs) are investigated using impedance spectroscopy. Ni nanowires synthesized via electrochemical deposition method based on anodic aluminum oxide (AAO) templates. Their structural characterization verified by scanning electron microscopy (SEM), x-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) analysis. Impedance spectroscopy as an essential technique utilized to understand the mechanism of gas interaction with the wires through the changes in their electronic behavior. Bode and Nyquist plots with the real and imaginary impedances are plotted versus frequency range of 500 Hz to 2 MHz at different relative humidity values (varying from 30% to 70%) and ethanol vapor concentrations (varying from 2 to 18 ppm). The equivalent circuits are proposed and simulated for impedance responses to both humidity and ethanol vapors. The impedance plots indicate the increase in resistance of the aligned nanowires at low frequencies by the adsorption of water and ethanol molecules.</description><subject>Aluminum oxide</subject><subject>anodic aluminum oxide</subject><subject>Equivalent circuits</subject><subject>Ethanol</subject><subject>Fourier transforms</subject><subject>Frequency ranges</subject><subject>gas sensor</subject><subject>Gas sensors</subject><subject>hard anodization</subject><subject>Humidity</subject><subject>Impedance spectroscopy</subject><subject>Infrared analysis</subject><subject>Infrared spectroscopy</subject><subject>Nanowires</subject><subject>Nickel</subject><subject>nickel nanowires</subject><subject>Nyquist plots</subject><subject>Relative humidity</subject><subject>Room temperature</subject><subject>Spectrum analysis</subject><subject>Structural analysis</subject><issn>2053-1591</issn><issn>2053-1591</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>DOA</sourceid><recordid>eNp9UUlLxDAYLaKgqHePBcGTo1-WZjmKuAyIgigeQ5plyDDT1KTj8u9tpzJ6EE_f9t77tqI4QnCGQIhzDBWZoEqic10zps1WsbdJbf_yd4vDnOcAgLkkFWZ7xctjjMuyc8vWJd2tkiuzWzjThbfBa3JoZmX0pV6EWeNseR_KRjfxPSSXy9W6Gnqq1Y3p8W1PTDGb2H4eFDteL7I7_Lb7xfP11dPl7eTu4WZ6eXE3MZTybmIYCLDgDcKMeVETaTEXdR8zwjyTnHLPa0GkkVBhgo22ggkEnDlqGaJkv5iOujbquWpTWOr0qaIOap2IaaZ06oJZOGWYRTUIJBG21HIsCUGSUi8pt8LXpNc6HrXaFF9XLndqHlep6cdXuKICA0Vi6AgjyvSr5uT8pisCNXxDDedWw7nV-I2ecjpSQmx_NP-Bn_wBX6YPxRVWgCugVLXWky_8M5dk</recordid><startdate>20200201</startdate><enddate>20200201</enddate><creator>Mohammadi, Masoumeh</creator><creator>Fardindoost, Somayeh</creator><creator>Iraji zad, Azam</creator><creator>Almasi-Kashi, Mohammad</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-2904-0888</orcidid><orcidid>https://orcid.org/0000-0002-2742-3797</orcidid></search><sort><creationdate>20200201</creationdate><title>Room temperature selective sensing of aligned Ni nanowires using impedance spectroscopy</title><author>Mohammadi, Masoumeh ; 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Res. Express</addtitle><date>2020-02-01</date><risdate>2020</risdate><volume>7</volume><issue>2</issue><spage>25044</spage><pages>25044-</pages><issn>2053-1591</issn><eissn>2053-1591</eissn><abstract>Room temperature gas sensing behavior of arrayed one-dimensional (1D) nickel nanowires (Ni NWs) are investigated using impedance spectroscopy. Ni nanowires synthesized via electrochemical deposition method based on anodic aluminum oxide (AAO) templates. Their structural characterization verified by scanning electron microscopy (SEM), x-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) analysis. Impedance spectroscopy as an essential technique utilized to understand the mechanism of gas interaction with the wires through the changes in their electronic behavior. Bode and Nyquist plots with the real and imaginary impedances are plotted versus frequency range of 500 Hz to 2 MHz at different relative humidity values (varying from 30% to 70%) and ethanol vapor concentrations (varying from 2 to 18 ppm). The equivalent circuits are proposed and simulated for impedance responses to both humidity and ethanol vapors. The impedance plots indicate the increase in resistance of the aligned nanowires at low frequencies by the adsorption of water and ethanol molecules.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/2053-1591/ab66ac</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-2904-0888</orcidid><orcidid>https://orcid.org/0000-0002-2742-3797</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Aluminum oxide anodic aluminum oxide Equivalent circuits Ethanol Fourier transforms Frequency ranges gas sensor Gas sensors hard anodization Humidity Impedance spectroscopy Infrared analysis Infrared spectroscopy Nanowires Nickel nickel nanowires Nyquist plots Relative humidity Room temperature Spectrum analysis Structural analysis |
| title | Room temperature selective sensing of aligned Ni nanowires using impedance spectroscopy |
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