Organic Nanomaterials with Two-Photon Absorption Properties for Biomedical Applications

During recent years there have been notorious advances in the development of organic molecules and π-conjugated polymers with two-photon activity, i.e., emission of fluorescence promoted by the molecular absorption of two photons. Novel organic materials have reached very large two-photon activity, and many of them have been processed successfully into nanostructured platforms. In contrast to their inorganic counterpart, organic nanoparticles with photonic properties is a topic that so far has not been well explored, although deserves big potential in biomedical applications. This chapter presents recent advances in this field, particularly, in the use of organic nanoparticles as contrast agents to obtain bioimages.