TMD silver Mirror #2

Yesterday the silver was quite successful. However, I only dipped the dense TMD side into the mixture, and the substrate was quite dense. Today, I looked at the substrate under a microscope beforehand to locate which side is dense and which is not and I dipped the whole sample into the mixture to see if the silver would coat all around, and if it does not, I could tell by looking back at the photos of the microscope to see if the dense side is not being coated well or if the less dense side is the problem.

Protocol

• Washing the substrate with acetone and isopropanol
• preparing 10ml of 0.1M AgNO3, 12.5–14% ammonium hydroxide, 5% glucose solution.
• adding the ammonium hydroxide solution into silver nitrate until the silver particles clear up (0.8ml this time, last time it took 1.4ml). I think the syringe might have not been as accurate so the concentration was slightly higher than expected.
• adding glucose solution into AgOH+NH4NO3.
• dipping the substrate into the mixture fully

Experiment

• adding total of 0.8ml 12.5–14% Ammonium Hydroxide to Silver Nitrate

• Adding 2ml of 5% Glucose

Youtube video of the whole process: https://youtu.be/x9MtEJ1p9-E

It ended up being successful and both left and right we’re all evenly coated.

I also performed lithography for the first time today using someone else’s sample. I learned the steps and did it on my own next to one of the post graduates.

Photoresist coating

Lithography

Stripping off the photo resistor