Abstract
Since the first time mussel-inspired polymer polydopamine (PDA) was discovered, it has gained enormous attention from numerous scientists, especially those working in the field of drug delivery and bacterial and tumor treatment, due to its distinctive properties, such as surface chemistry, biocompatibility, capability to adhere to any surface, and excellent photothermal conversion. Studies using PDA in various types of structures for therapeutic purposes have been carried out extensively in recent years. Considering the rapid development in the area, this review aims to cover and highlight the latest achievements (from 2016 to present) with respect to PDA-based materials for therapeutic purposes. A description of the diverse structures of PDA and its formation strategy, including colloidal particles, hollow structures, and coating films, are discussed. In addition, the main focus of this review is on the therapeutic applications of these PDA nanostructures.