Stepwise assembly of multimetallic nanoparticles via self-polymerized polydopamine

Highly controlled coating of biomimetic polydopamine in TiO2 nanotubes

“…3a, three types of decoration were performed. The first one consisted of using the reductive ability of the PDA catechol groups for the spontaneous reduction of a metal cation on the coated tubes [23,24]. The PDA-coated samples were exposed to a solution of AgNO 3 for 14 h in the dark, followed by rinsing and drying under N 2 .…”

“…All the decorations were performed on freshly-coated surfaces. For AgNP-decoration, the PDA-coated surface was exposed to a solution of 20 mM AgNO 3 in the dark and the AgNPs spontaneously decorated the tubes due to the reduction of Ag + by the PDA catechol groups, as it was demonstrated by Sureshkumar et al and Guo et al [23,24]. After 14 h, the surface Electrochemistry Communications 52 (2015) [41][42][43][44] was rinsed with Milli-Q water and dried in a nitrogen stream.…”

“…PDA coatings are most of the time performed using the procedure developed by Lee et al [12] in which, dopamine spontaneously polymerizes at a slightly basic pH, which leads to the coating of the immersed surfaces with PDA [13,14]. Among others, it has been applied for sensing, [15][16][17][18] for the passive dispensing of aqueous solutions, [19] for making graphitic transparent stretchable electrodes, [20] and it can moreover be used as a platform for the decoration of surfaces with NPs [21][22][23][24][25][26]. Nam et al previously described the sensitizing of TiO 2 NPs with PDA and used this phenomenon for fabricating DSSCs, [27] but so far no research has been done on anodized TiO 2 NTs coated with PDA.…”

Antimicrobial activity and cytocompatibility of silver nanoparticles coated catheters via a biomimetic surface functionalization strategy

“…11,12 Many researches reveal that the catechol groups in the polydopamine films could in situ generate the AgNPs without using surfactant or reducing agents. [13][14][15][16][17][18] This method has been successfully used for surface modification on various substrate materials, such as microspheres, 13 fibers, 14 and polymer films. 15,16 The polydopamine films also owned strong metal binding ability and adhering capacity to AgNPs.…”

“…17 Sureshkumar et al prepared a multilayer of metal nanoparticles on polymer film and found that the surface density of metal nanoparticles could be adjusted by varying the polydopamine coating time. 18 The commonly used CVCs in the clinic include polyurethane, silicone, and PTFE CVCs. 4 However, the adhesion force of coatings was rather weak owing to the hydrophobic property of the CVCs, and it was difficult to prepare coatings with good adherence on CVCs.…”