Polydopamine Spheres as Active Templates for Convenient Synthesis of Various Nanostructures

Abstract

In this work, monodisperse polydopamine (PDA) spheres with tunable diameters have been synthesized through a facile and low cost method using a deionized water and alcohol mixed solvent. The PDA spheres possess surface functional groups (-OH, -NH(2)), exhibiting an extraordinary versatile active nature. It is demonstrated that the PDA spheres could serve as an active template for the convenient synthesis of various nanostructures, e.g., MnO(2) hollow spheres or PDA/Fe(3)O(4) and PDA/Ag core/shell nanostructures. No surface modification or special treatment is required for the synthesis of these nanostructures, which makes the fabrication process simple and very convenient. The novel application of PDA/Fe(3)O(4) spheres as fillers in nanocomposites for high-performance capacitors is demonstrated, indicating a promising practicality. The PDA spheres provide a new general platform not only for the facile assembly of nanostructures but also a green synthetic template for practical applications.

Poly(dopamine) coating of 3D printed poly(lactic acid) scaffolds for bone tissue engineering

“…e l s e v i e r . c o m / l o c a t e / m s e c surfaces via self-polymerization by the oxidation of DA in a weak alkaline buffer solution [14]. The material-independent PDA coating can be easily and quickly obtained by base-triggered oxidation and polymerization of DA, and the PDA adlayer serves as a platform for post-modification, including spontaneous deposition of metal and bioceramic, as well as covalent immobilization of several serum adhesive proteins [15][16][17].…”

Molecular-based design and emerging applications of nanoporous carbon spheres

“…By selecting melamine, resorcinol and formaldehyde as precursors, a series of melamine-phenolic resin-based spheres and N-doped NCS with tailored particle sizes, microporosity and nitrogen content in the framework was created 47,48 . N-rich micro-CS were prepared in a similar way by replacing resorcinol and formaldehyde as carbon precursors with biocompatible dopamine-containing carbon and nitrogen atoms 49,50 . The recent extension of the Stöber method to the synthesis of NCS creates tremendous opportunities not only for the design of novel CS with micropores, mesopores, or both, but also for the development of h-NCS.…”

Poly(Dopamine)-Assisted Immobilization of Xu Duan on 3D Printed Poly(Lactic Acid) Scaffolds to Up-Regulate Osteogenic and Angiogenic Markers of Bone Marrow Stem Cells

“…Lots of studies influenced by the adhesion of mussels to rocks in wet environments have reported that the adhesive proteins secreted by mussels mainly contain dihydroxyphenylalanine (DOPA) and lysine, and this has attracted great attention in the field of biomedical materials [15]. Similarly, dopamine (DA) contains the same catechol functional group as that of the side chain of DOPA residues, as well as the same amine functional group, and a unique feature of PDA is its ability to deposit on various hydrophobic or hydrophilic surfaces via self-polymerization by the oxidation of DA in a weak alkaline buffer solution [16]. The material-independent PDA coating can obtained quickly by polymerization of DA, and the PDA layer serves as a platform for modification, containing spontaneous deposition of ceramic, metal, and other materials, as well as covalent immobilization of several serum adhesive proteins [17,18,19].…”