{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T11:58:20Z","timestamp":1774958300252,"version":"3.50.1"},"reference-count":49,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2016,6,7]],"date-time":"2016-06-07T00:00:00Z","timestamp":1465257600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004515","name":"Universiti Kebangsaan Malaysia","doi-asserted-by":"publisher","award":["DIP 2014-023"],"award-info":[{"award-number":["DIP 2014-023"]}],"id":[{"id":"10.13039\/501100004515","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this study, porous silicon (PSi) was prepared and tested as an extended gate field-effect transistor (EGFET) for pH sensing. The prepared PSi has pore sizes in the range of 500 to 750 nm with a depth of approximately 42 \u00b5m. The results of testing PSi for hydrogen ion sensing in different pH buffer solutions reveal that the PSi has a sensitivity value of 66 mV\/pH that is considered a super Nernstian value. The sensor considers stability to be in the pH range of 2 to 12. The hysteresis values of the prepared PSi sensor were approximately 8.2 and 10.5 mV in the low and high pH loop, respectively. The result of this study reveals a promising application of PSi in the field for detecting hydrogen ions in different solutions.<\/jats:p>","DOI":"10.3390\/s16060839","type":"journal-article","created":{"date-parts":[[2016,6,7]],"date-time":"2016-06-07T11:17:28Z","timestamp":1465298248000},"page":"839","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":78,"title":["High Sensitivity pH Sensor Based on Porous Silicon (PSi) Extended Gate Field-Effect Transistor"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7309-9660","authenticated-orcid":false,"given":"Naif","family":"Al-Hardan","sequence":"first","affiliation":[{"name":"School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia"}]},{"given":"Muhammad","family":"Abdul Hamid","sequence":"additional","affiliation":[{"name":"School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia"}]},{"given":"Naser","family":"Ahmed","sequence":"additional","affiliation":[{"name":"School of Physics, Universiti Sains Malaysia (USM), 11800 Penang, Pulau Pinang, Malaysia"}]},{"given":"Azman","family":"Jalar","sequence":"additional","affiliation":[{"name":"Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia"}]},{"given":"Roslinda","family":"Shamsudin","sequence":"additional","affiliation":[{"name":"School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia"}]},{"given":"Norinsan","family":"Othman","sequence":"additional","affiliation":[{"name":"School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia"}]},{"given":"Lim","family":"Kar Keng","sequence":"additional","affiliation":[{"name":"School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 Bangi, Selangor, Malaysia"}]},{"given":"Weesiong","family":"Chiu","sequence":"additional","affiliation":[{"name":"Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia"}]},{"given":"Hamzah","family":"Al-Rawi","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering\u2014Universiti Sains Malaysia (USM), 14300 Nibong Tebal, Pulau Pinang, Malaysia"}]}],"member":"1968","published-online":{"date-parts":[[2016,6,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"897","DOI":"10.1016\/j.snb.2014.06.048","article-title":"Porous silicon chemical sensors and biosensors: A review","volume":"202","author":"Harraz","year":"2014","journal-title":"Sens. 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