It was a relatively slow day in the lab because some of the equipment was malfunctioning, which prevented me from carrying out the work I would typically do. Instead of getting to learn how to use the spin coater, which is something I had been looking forward to, I helped out with some contact angle measurements.
This entails first adjusting the pH of various solutions to ensure that they're sufficiently calibrated for usage with the machine. In total, I had to adjust three solutions with the brand-new (well, new to being used, as its off-color and dirt-crusted appearance suggested quite some time has passed since its retail days) pH meter. One solution in particular was frustrating to adjust because it kept bouncing a little too low and then a little too high, but I eventually got it.
Then I brought these solutions over to the contact angle machine. I have seen this used before and have helped a little bit with it in the past, but for the first time I was able to operate it alone, which was fun. I measured the contact angles of droplets under varying pH levels on the surfaces of the wafers, making sure to measure them both increasing in pH and decreasing.
After that, I helped out with general lab affairs, such as cleaning an enormous quantity of glassware.
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