Advanced drug delivery systems are having an enormous impact on human health. new drug delivery technologies including nanoparticles and nanotechnology are now being studied for use in treating cancer. Approaches for synthesizing new biomaterials, which can be used in fighting brain cancer and new approaches for engineering tissues are being developed that may someday help in various diseases. Robert Samuel Langer, Jr. is an American chemical engineer, scientist, entrepreneur, inventor and the David H. Koch Institute Professor at the Massachusetts Institute of Technology. He is a widely recognized and cited researcher in biotechnology, especially in the fields of drug delivery systems and tissue engineering. His publications have been cited approximately 220,000 times and his h-index is 233.