Nanotechnology is emerging as a new field enabling the creation and application of materials , devices, and systems at atomic and molecular levels and the exploitation of novel properties that emerge at the nanometer scale. Many areas of biomedical engineering are expected to benefit from nanotechnology including cancer diagnosis and therapy, medical implants, tissue engineering etc. This book includes the concepts of synthesis and characterisation of nano materials, impact of nanotechnology on surgery , sensing applications, nano-artificial cells and bionanomachines, nano particles in drug delivery devices. This book has a special role to play in the curriculum of all branches of Science, Engineering, and Technology and will hopefully present valuable guidelines to young graduates.