Fabrication and characterization of GaN-based two terminal devices for liquid sensing
Gallium Nitride (GaN) based materials are highly suitable for liquid-phase sensor applications due to their chemical stability and high internal piezoelectric polarization. The sensitivity of GaN surfaces in aqueous solutions and polar liquids has been investigated. For this purpose, two terminal de...
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my.utm.296772017-10-13T13:51:23Z http://eprints.utm.my/id/eprint/29677/ Fabrication and characterization of GaN-based two terminal devices for liquid sensing Jeat, W. S. Zainal Abidin, Mastura Shafinaz Hashim, Abdul Manaf Abd Rahman, Shaharin Fadzli Sharifabad, M. E. Qindeel, Rabia Mustafa, F. Rahman, A. R. A. Omar, N. A. TK Electrical engineering. Electronics Nuclear engineering Gallium Nitride (GaN) based materials are highly suitable for liquid-phase sensor applications due to their chemical stability and high internal piezoelectric polarization. The sensitivity of GaN surfaces in aqueous solutions and polar liquids has been investigated. For this purpose, two terminal devices fabricated on bulk Si doped-GaN structures and undoped-AlGaN/GaN heterostructures with unpassivated open area are used to measure the responses to the changes of the H + concentration in aqueous solutions and the dipole moment in polar liquids. The I-V characteristics show that the devices are able to distinguish the variations of pH. It is observed that the drain current decreases linearly with pH for both device structures. Evaluating the sensitivity in aqueous solutions at V DS 2V, a quite large current change is obtained for both structures. For the response to polar liquids, it is also found that the drain current decreases with the dipole moments. The results indicate that both devices are capable of distinguishing molecules with different dipole moments. IOP Publishing 2011 Article PeerReviewed text/html en http://eprints.utm.my/id/eprint/29677/2/1757-899X_17_1_012024.pdf Jeat, W. S. and Zainal Abidin, Mastura Shafinaz and Hashim, Abdul Manaf and Abd Rahman, Shaharin Fadzli and Sharifabad, M. E. and Qindeel, Rabia and Mustafa, F. and Rahman, A. R. A. and Omar, N. A. (2011) Fabrication and characterization of GaN-based two terminal devices for liquid sensing. IOP Conference Series: Materials Science and Engineering, 17 (1). 001-009. ISSN 1757-8981 http://dx.doi.org/10.1088/1757-899X/17/1/012024 DOI:10.1088/1757-899X/17/1/012024 |
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TK Electrical engineering. Electronics Nuclear engineering Jeat, W. S. Zainal Abidin, Mastura Shafinaz Hashim, Abdul Manaf Abd Rahman, Shaharin Fadzli Sharifabad, M. E. Qindeel, Rabia Mustafa, F. Rahman, A. R. A. Omar, N. A. Fabrication and characterization of GaN-based two terminal devices for liquid sensing |
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Gallium Nitride (GaN) based materials are highly suitable for liquid-phase sensor applications due to their chemical stability and high internal piezoelectric polarization. The sensitivity of GaN surfaces in aqueous solutions and polar liquids has been investigated. For this purpose, two terminal devices fabricated on bulk Si doped-GaN structures and undoped-AlGaN/GaN heterostructures with unpassivated open area are used to measure the responses to the changes of the H + concentration in aqueous solutions and the dipole moment in polar liquids. The I-V characteristics show that the devices are able to distinguish the variations of pH. It is observed that the drain current decreases linearly with pH for both device structures. Evaluating the sensitivity in aqueous solutions at V DS 2V, a quite large current change is obtained for both structures. For the response to polar liquids, it is also found that the drain current decreases with the dipole moments. The results indicate that both devices are capable of distinguishing molecules with different dipole moments. |
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Article |
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Jeat, W. S. Zainal Abidin, Mastura Shafinaz Hashim, Abdul Manaf Abd Rahman, Shaharin Fadzli Sharifabad, M. E. Qindeel, Rabia Mustafa, F. Rahman, A. R. A. Omar, N. A. |
author_facet |
Jeat, W. S. Zainal Abidin, Mastura Shafinaz Hashim, Abdul Manaf Abd Rahman, Shaharin Fadzli Sharifabad, M. E. Qindeel, Rabia Mustafa, F. Rahman, A. R. A. Omar, N. A. |
author_sort |
Jeat, W. S. |
title |
Fabrication and characterization of GaN-based two terminal devices for liquid sensing |
title_short |
Fabrication and characterization of GaN-based two terminal devices for liquid sensing |
title_full |
Fabrication and characterization of GaN-based two terminal devices for liquid sensing |
title_fullStr |
Fabrication and characterization of GaN-based two terminal devices for liquid sensing |
title_full_unstemmed |
Fabrication and characterization of GaN-based two terminal devices for liquid sensing |
title_sort |
fabrication and characterization of gan-based two terminal devices for liquid sensing |
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IOP Publishing |
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2011 |
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http://eprints.utm.my/id/eprint/29677/2/1757-899X_17_1_012024.pdf http://eprints.utm.my/id/eprint/29677/ http://dx.doi.org/10.1088/1757-899X/17/1/012024 |
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