The design and development of new agents that enable or enhance the passage of drugs and probes across biological barriers is a goal of unsurpassed significance in the search for improved imaging molecules, diagnostics and therapies. However, the development of highly-effective molecular transporters is hindered by current synthetic strategies. As such, it is critical to be able to prepare novel monodisperse molecular transporters (Ð=1) with precise structures, compositions, and function, which are essential for their special and unique transport properties. In this project, a versatile and scalable strategy for the preparation of discrete (monodisperse) materials will be developed. This approach enables the combination of facile polymerization procedures and ubiquitous purification processes. Different types of well-defined oligomers with different charges will be synthesized and their interaction and internalization with cells will be further demonstrated.