A team of scientists led by the Department of Applied Physics at Osaka University, the Department of Physics and Electronics at Osaka Prefecture University, and the Department of Materials Chemistry at Nagoya University used photoinduced force microscopy to map out the forces acting on quantum dots in three dimensions. By eliminating sources of noise, the team was able to achieve subnanometer precision for the first time ever, which may lead to new advances in photocatalysts and optical tweezers.