TBH, more people were using AFMs than STMs, because they're cheaper (I think) and the fact that the STM is based on conductivity limits what can be imaged. Get

TBH, more people were using AFMs than STMs, because they're cheaper (I think) and the fact that the STM is based on conductivity limits what can be imaged. Getting pictures of atoms is nice, but sometimes you want to image molecules, especially organic ones (tricky to do in a STM).