Nanofabrication techniques for controlled drug-release devices

New drugs and delivery systems have undergone a rapid development in recent years for treating cancer, HIV/AIDS, diseased organs and damaged nerves to relieve pain, preventing disease and restoring health in humans [1]. The application of nanotechnology in nanomedicine for drug delivery is a new field and has raised great attention. Compared with conventional drugdelivery mechanisms, nanoscale systems can deliver the drugs directly to diseased cells and minimize damage to healthy cells, and they can be made small enough to be implantable in the body. Alternatively, by modifying the shells of the drug, shells can release the drug automatically under certain stimuli. Nanoscale controlled-release drug systems provide highly selective and effective therapeutic modalities [2].