Nanorobots size ranges from 0.1-10 micrometer. Carbon ca be used in the form of nanocomposites, fullerene/diamond, for their strength and chemical inertness of the form. Nanorobotics can be used for cancer detection and therapy, hematology, biohazards defense, etc. It can also be used in automation of production industry, molecular chemistry, automotive & aerospace, material science research and electronics-communication engineering.