I came up with a new way of making an atom change the direction it’s rotating, or even make it rotate in two directions at once. It hasn’t been done in a lab yet though (just with maths), so I’m not sure it counts as inventing something.
I haven’t invented anything materialistic that can be “touched”. During my research I did come up with a mathematical parametric equation that allows me to transform a flat layer of graphene into a folded structure. Then I had to write a computer program to do the maths for me. It was very satisfying once it was completed.
I contributed to the invention of a protein microarray whilst I was an undergraduate. It’s basically a method of looking at how thousands of different proteins interact by printing them on a glass slide. Some of the proteins are tagged with a molecule that glows when exposed to laser light so we can check for the interactions. It was pretty satisfying the first time it lit up.