Recent developments in polydopamine-based photocatalytic nanocomposites for energy production: Physico-chemical properties and perspectives

Reviewing the use of chitosan and polydopamine for electrochemical sensing

“…PDA is generally conductive; however, when coated onto electrodes, the conductivity of the electrode decreases, especially on microelectrodes that are typically required for in-vivo detection [44]. Care must be taken when developing electrochemical sensors using PDA owing to its inherent spontaneous chemical reactivity toward nucleophiles and possible interference from redox peaks depending on the layer thickness and morphology [45]. However, this reactivity is also its main benefit because it facilitates adhesion between different structures.…”

Replacing amine by azide: dopamine azide polymerization triggered by sodium periodate

“…1 The eumelanins are naturally occurring black pigments comprising numerous cross-linked 5,6-dihydroxyindole (DHI) and 5,6-dihydroxyindole-2-carboxylic acid (DHICA) units and are characterized by structural complexity and insolubility as well as broadband absorption in UV-vis light. [2][3][4][5] Since PDA was reported by Lee et al in 2007 as a substrate for independent coating materials, complete understanding of this material's character, chemistry, and formation has remained challenging. 6 Different structural models of PDA have been reported (see Fig.…”

“…1 The eumelanins are naturally occurring black pigments comprising numerous cross-linked 5,6-dihydroxyindole (DHI) and 5,6-dihydroxyindole-2-carboxylic acid (DHICA) units and are characterized by structural complexity and insolubility as well as broadband absorption in UV–vis light. 2–5…”

Rhodium-Complex-Functionalized and Polydopamine-Coated CdSe@CdS Nanorods for Photocatalytic NAD+ Reduction

“… 13 , 14 Reported PDA coatings for photocatalytic systems make use of the interaction of PDA and semiconductor or metal nanoparticles. 15 Additionally, the presence of multiple functional groups in PDA also allows for straightforward surface functionalization, e.g., by reaction of the quinones of PDA with amines in Michael addition or Schiff base reactions. 16 , 17 This in turn offers the opportunity to functionalize PDA also with molecular catalysts via various functional groups.…”

“…Previously, CdS/PDA/TiO 2 core/shell nanoparticles have been achieved in which the PDA layer improved the photocurrent and photocatalytic performance because of enhanced light absorption and charge carrier mobility . Furthermore, PDA coatings increased the photostability of CdS semiconductors, which facilitated the transfer of electrons to quench holes and prevented oxidation by the formation of a strong coordination bond. , Reported PDA coatings for photocatalytic systems make use of the interaction of PDA and semiconductor or metal nanoparticles . Additionally, the presence of multiple functional groups in PDA also allows for straightforward surface functionalization, e.g., by reaction of the quinones of PDA with amines in Michael addition or Schiff base reactions. , This in turn offers the opportunity to functionalize PDA also with molecular catalysts via various functional groups.…”