not suitable for drug carriers due to their metallic nature but have been hotly pursued as potential imaging reagents. Research to date on QDots show them to be toxic to body tissues [7][8]. Thus far it seems there is no good nano-carrier for therapeutic delivery but one that has been introduced a few years back does seem to have great potential. PEG-based nanoparticle formulations have been used in the past but until recently none were stable enough for therapeutic delivery.A new more robust and nontoxic drug delivery nanoparticle has been achieved by Immunotrex Biologics, Inc. in conjunction with the University of Massachusetts-Lowell. This new method of producing water based copolymer PEG nanoparticles allows for formation of nano-micelles with highly adaptable surface chemistry thus allowing for a wide range of applications-from a basic carrier of imaging agents to a vast range therapeutics. The flexibility of this water-based nanosphere allows for not only single payload delivery but also multiple, diverse payloads to be delivered with time release precision [9].We have a process to make water soluble nanospheres (80-100nm) with the capacity to encapsulate both hydrophobic and hydrophilic drugs, along with the ability to selectively target cells in tissue via ligands attached to the outer surface. Currently, research is focused on drug delivery to selective targets via ligand attachments. This should pave the way for more complex nanoparticle delivery systems [9,10] (Figure 2).