Centrifuge the solution at 2000 rpm for 2 minutes. Followed by the washing step where we discard the supernatant and add 10 ml of distilled water. Perform the washing step 5-6 times until the pH of the solution is neutral (pH 6.5). Wash it again and transfer the solution to a 150mL beaker and add 5mL of the prepared Thymoquinone or dissolve the thymoquinone in DMSO (1:1 ratio) and add 5mL of it to the iron oxide solution. Place a magnetic stirrer at 120rpm for uniform mixing (Note: No heat must be provided). Transfer the precipitate to a Petri plate and place it in a hot air oven at 60 degrees Celsius for strictly 8 hours to avoid crystallization. Scrape out the particles using a sterilized spatula and store them in a 1.5ml sealed tube away from sunlight.