A nanotechnologist is a scientist or engineer who specializes in the study and application of nanotechnology, which involves the manipulation of matter on an atomic, molecular, and supramolecular scale. Typically, this scale ranges from 1 to 100 nanometers. Nanotechnologists work in various fields, including medicine, electronics, energy, and materials science, aiming to innovate and develop new technologies that utilize the unique properties of nanoscale materials.