Sol–Gel Derived Spin-Coated NiO Thin Films for LPG Detection

Author(s)	Dr. Rohit Madhukar Nikam
Country	India
Abstract	Nickel oxide (NiO) thin films were successfully synthesized using a simple sol–gel spin coating technique. Nickel nitrate hexahydrate and citric acid were used as precursor and complexing agent respectively, with double distilled water as solvent. The spin coating was performed on glass substrates at 2000 rpm for 60 seconds. The prepared NiO thin films showed thickness of 38 nm, resistivity of 271.2 Ω·m, temperature coefficient of resistance (TCR) of -0.0022 °C⁻¹, and activation energy of 0.11355 eV. The fabricated NiO thin films were characterized for their gas sensing performance towards liquefied petroleum gas (LPG). The films exhibited a sensitivity of 78.95% at an optimum operating temperature of 100°C for 500 ppm of LPG. The response and recovery times were found to be 18 s and 61 s respectively, indicating good semiconducting behavior and suitability for gas sensing applications.
Keywords	Nickel oxide, spin coating, gas sensing, resistivity, semiconducting behavior.
Published In	Volume 16, Issue 1, January-March 2025
Published On	2025-02-08

About IJSAT Fees & Payment Current Issue Publication Archive	Submit Research Paper Track Submission Status Publication Guidelines Publication Ethics Peer Review & Plagiarism	Join as a Reviewer Editors & Reviewers Reviewer Referral Program Get Reviewer Membership Certi.	Website/Journal Policies Usage Policy Content Policies Privacy Policy

Contact Us	Message on WhatsApp	+91-9687-182-185	editor@ijsat.org

International Journal on Science and Technology