Material-Independent Surface Modification Inspired by Principle of Mussel Adhesion
Mussels’ unique ability to adhere virtually any surfaces of materials underwater has drawn significant attention to scientists and engineers. This chapter will introduce a new concept of surface chemistry called polydopamine that can functionalize virtually any material surfaces. Polydopamine (PD) is a uniquely adaptable and simple surface functionalization method, being the first single step material-independent surface chemistry when it was first reported in 2007 (Lee H, Dellatore SM, Miller WM, Messersmith PB, Science 318:426–430, 2007). Understanding this surface chemistry is essential for the next chapter 15 for explaining a general strategy to incorporate stimuli-sensitive properties at a surface level. We compare PD coatings to other commonly employed surface modification methods, followed by an account of how approaches to PD deposition have evolved from the original ‘recipe’ to the current state-of-the-art PD preparation methods.