Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods
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2014
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my.unimap-339572014-04-23T07:05:30Z Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods Muhammad Kashif, Muhammad Faroow Md. Eaqub, Ali, Dr. Syed Muhammad Usman, Ali Shah, Dr. Uda, Hashim, Prof. Dr. Sharifah Bee, O.A Abd Hamid, Prof. Dr. kashif_bme@yahoo.com eaqubali@um.edu.my uashah68@neduet.edu.pk uda@unimap.edu.my sharifahbee@um.edu.my Impedance behavior Nyquist plot Pd-sensitized ZnO nanorods Sol-gel Link to publisher's homepage at http://www.springeropen.com/ ZnO nanorods were synthesized using a low-cost sol-gel spin coating technique. The synthesized nanorods were consisted of hexagonal phase having c-axis orientation. SEM images reflected perpendicular ZnO nanorods forming bridging network in some areas. The impact of different hydrogen concentrations on the Pd-sensitized ZnO nanorods was investigated using an impedance spectroscopy (IS). The grain boundary resistance (Rgb) significantly contributed to the sensing properties of hydrogen gas. The boundary resistance was decreased from 11.95 to 3.765 kΩ when the hydrogen concentration was increased from 40 to 360 ppm. IS gain curve showed a gain of 6.5 for 360 ppm of hydrogen at room temperature. Nyquist plot showed reduction in real part of impedance at low frequencies on exposure to different concentrations of hydrogen. Circuit equivalency was investigated by placing capacitors and resistors to identify the conduction mechanism according to complex impedance Nyquist plot. Variations in nanorod resistance and capacitance in response to the introduction of various concentrations of hydrogen gas were obtained from the alternating current impedance spectra. 2014-04-23T07:05:30Z 2014-04-23T07:05:30Z 2013 Article Nanoscale Research Letters, vol. 8(1), 2013, pages 1-9 1931-7573 http://www.nanoscalereslett.com/content/8/1/68 http://dspace.unimap.edu.my:80/dspace/handle/123456789/33957 en Licensee Springer |
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English |
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Impedance behavior Nyquist plot Pd-sensitized ZnO nanorods Sol-gel |
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Impedance behavior Nyquist plot Pd-sensitized ZnO nanorods Sol-gel Muhammad Kashif, Muhammad Faroow Md. Eaqub, Ali, Dr. Syed Muhammad Usman, Ali Shah, Dr. Uda, Hashim, Prof. Dr. Sharifah Bee, O.A Abd Hamid, Prof. Dr. Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods |
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Link to publisher's homepage at http://www.springeropen.com/ |
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kashif_bme@yahoo.com |
| author_facet |
kashif_bme@yahoo.com Muhammad Kashif, Muhammad Faroow Md. Eaqub, Ali, Dr. Syed Muhammad Usman, Ali Shah, Dr. Uda, Hashim, Prof. Dr. Sharifah Bee, O.A Abd Hamid, Prof. Dr. |
| format |
Article |
| author |
Muhammad Kashif, Muhammad Faroow Md. Eaqub, Ali, Dr. Syed Muhammad Usman, Ali Shah, Dr. Uda, Hashim, Prof. Dr. Sharifah Bee, O.A Abd Hamid, Prof. Dr. |
| author_sort |
Muhammad Kashif, Muhammad Faroow |
| title |
Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods |
| title_short |
Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods |
| title_full |
Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods |
| title_fullStr |
Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods |
| title_full_unstemmed |
Impact of hydrogen concentrations on the impedance spectroscopic behavior of Pd-sensitized ZnO nanorods |
| title_sort |
impact of hydrogen concentrations on the impedance spectroscopic behavior of pd-sensitized zno nanorods |
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Licensee Springer |
| publishDate |
2014 |
| url |
http://dspace.unimap.edu.my:80/dspace/handle/123456789/33957 |
| _version_ |
1643797358749679616 |
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13.222552 |