Hierarchical positioning of gold nanoparticles into periodic arrays using block copolymer nanoring templates

2D and 3D Nanopatterning of Titanium for Enhancing Osteoinduction of Stem Cells at Implant Surfaces

“…In this study we did not use any other methods to tune the distance in between the titania nanodots but it should be noted that previous studies using PS‐b‐P4VP and PS‐b‐P2VP templates have shown that a range of other methods can be used to control the precise dimensions of the BCP films. Changing the copolymer concentration, spin‐coating speed, type of solvent and the addition of PS homopolymer have been reported to alter the BCP film arrangement,32–34 all of which should be compatible with the anodisation technique used in the present study. By changing the solvent annealing conditions it is also possible to change the morphology of the PS‐b‐P4VP template from spheres arranged hexagonally to a cylindrical morphology, resulting in a line or finger‐print type pattern 34…”

Ligand-free synthesis of gold nanoparticles incorporated within cylindrical block copolymer films

“…However, because of the increased confinement of cylindrical structures as compared to lamellae, it can be difficult to find the right balance between -i-an insufficient swelling of the matrix, leading to incomplete diffusion of the precursor reagents and therefore gradients in the filler concentration 32 , and -ii-a too efficient swelling leading to structure disruption. In particular, the immersion in aqueous or ethanolic solutions -containing the gold salt and/or the reducing agent-can damage the film structure due to nanodomain swelling 33 . Because there is still a need for simple strategies able to build a nanocomposite made from perpendicular cylinders full of AuNPs, we considered here an alternative strategy consisting in the direct synthesis of the AuNPs in the copolymer solution prior to the film formation.…”

Nanoparticles selectively immobilized onto large arrays of gold micro and nanostructures through surface chemical functionalizations

“…Finding reliable and simple methods for the precise self-assembly of colloids onto different regions of a patterned surface is a major current issue in nanofabrication [1][2][3][4][5][6]. Solving this issue could bridge the gap between top-down fabrication processes such as lithography which allows the creation of large arrays of welldefined nanostructures on a surface (e.g., plasmonic nanoantennas or electrodes) and bottom-up built nano-objects with unique physicochemical properties (e.g., fluorescent nanoparticles or silicon nanowires) [7,8].…”