Ismai NF, Ismail LN, Y. Lee K, Zulhanip AZ, Mohamad Hadis NS, Mohd Radzol AR. Etching Time on Structural and Electrical Properties of Porous Silicon SERS Substrates for Non-Invasive Dengue-NS1 Detection. IJIE. 2021;13(5):119-126. Accessed August 7, 2026. https://journal.uthm.edu.my/index.php/ijie/article/view/8689