I have made silver Nanoparticles using neem leaf extract. I have adjusted the ratio as 3 ml neem leaf extract and 7 ml 1mM AgNO3.
Please tell why the peak is coming at 380 nm (approx.) instead of 420 nm.
Also, please tell when I repeat the same experiment I got the reading to be exact 420 nm but afterwards it didn't come. It's repeatedly coming at 380 nm.
Kindly help.