One Strategy for Nanoparticle Assembly onto 1D, 2D, and 3D Polymer Micro and Nanostructures

Abstract

The integration of nanoparticles (NPs) into photonic devices and plasmonic sensors requires selective patterning of these NPs with fine control of their size, shape and spatial positioning. In this article, we report on a general strategy to pattern different types of NPs. This strategy involves the functionalization of photopolymers before their patterning by two-photon laser writing to fabricate micro-and nanostructures that selectively attract colloidal 2 NPs with suitable ligands, allowing their precise immobilization and organization even within complex 3D structures. Monolayers of NPs without aggregations are obtained and the surface density of NPs on the polymer surface can be controlled by changing either the time of immersion in the colloidal solution or the type of amine molecule chemically grafted on the polymer surface. Different types of NPs (gold, silver, polystyrene, iron oxide, colloidal quantum dots and nanodiamonds) of different sizes are introduced showing a potential towards nanophotonic applications. To validate the great potential of our method, we successfully demonstrate the integration of quantum dots within a gold nanocube with high spatial resolution and nanometer precision. The promise of this hybrid nano-source of light (plasmonic/polymer/QDs) as optical nanoswitch is illustrated through photoluminescence measurements under polarized exciting light.

3D nanoprinting of semiconductor quantum dots by photoexcitation-induced chemical bonding

“…Three-dimensional (3D) manufacturing of functional nanomaterials beyond polymers remains challenging. One strategy is to use a 3D polymer skeleton as a mask for conformal deposition of inorganic materials, producing organic-inorganic nanohybrids (4)(5)(6). However, the existence of unwanted polymer skeletons reduces the material's purity and impedes their intrinsic mechanical or physical properties.…”

Large-scale controlled coupling of single-photon emitters to high-index dielectric nanoantennas by AFM nanoxerography

“…6c). The normalized decay rate in the gap also depends on the dipole orientation, [62][63][64] and its height above the dimer/substrate, which is determined by the PMMA thickness at the gap location (see Fig. S5 in the ESI †).…”

Strategy for Patterning Single Colloidal Gold Nanoparticles on Two Photon Polymerized and Functionalized Ultrathin Nanostructures

“…We obtained an overall success rate of 60% in all of our trials. This introduced method is quite promising in trapping and immobilizing all sorts of nanoparticles not just gold as long as they are functionalized with negatively charged ligands . This approach offers multiple advantages including steady and stable trapping that is not dependent on an external force, in addition to the simplicity of fabrication, efficiency, robustness, and local integration precision as well as compatibility with multidimensional structures.…”