Solution-Dispersible Metal Nanorings with Deliberately Controllable Compositions and Architectural Parameters for Tunable Plasmonic Response

Abstract

We report a template-based technique for the preparation of solution-dispersible nanorings composed of Au, Ag, Pt, Ni, and Pd with control over outer diameter (60-400 nm), inner diameter (25-230 nm), and height (40 nm to a few microns). Systematic and independent control of these parameters enables fine-tuning of the three characteristic localized surface plasmon resonance modes of Au nanorings and the resulting solution-based extinction spectra from the visible to the near-infrared. This synthetic approach provides a new pathway for solution-based investigations of surfaces with negative curvature.

Plasmonic Photothermal Therapy in Third and Fourth Biological Windows

“…Replacing nanodisks by nanorings would be a simple implementation of the contour design to the self-assembling chains. There are both top-down and bottom-up methods for fabricating these nanodisk and nanoring NPs [19,20]. For a comparison of the absorption properties of self-assembling nanodisk/nanoring-chains and monolithic solid/contour nanobars, we picked a sample from each with the same resonance wavelength centered in the NIR-IV.…”

Selective Enhancement of Surface and Bulk E-Field within Porous AuRh and AuRu Nanorods

“…The approach, pioneered by Martin, Penner, and Moskovits, 29 − 31 provides a powerful way to synthesize a large variety of multisegmented metal and semiconductor nanowires with a high control over the segment length, composition, and morphology. 5 , 9 , 32 − 36 Because the segment length is electrochemically controlled, templated deposition within AAO membranes can provide a spatial resolution down to the sub-5 nanometer range 5 , 35 that is well-suited for the combination of different materials at the nanoscale.…”

Templated Synthesis of Uniform Perovskite Nanowire Arrays

“…AAO represents an ideal template for nanowire synthesis, because (1) it can be directly prepared on transparent conductive substrates for subsequent device integration, (2) pore diameter can be finely tuned to control nanowire diameter ( D ), and (3) the formation of spatially discrete, oriented nanowires enables systematic structure–function characterization. Traditionally, electrodeposition has been used to generate nanomaterials within AAO, including metals, − simple inorganic semiconductors, ,, and polymers. , However, many materials, such as metal halide perovskites, cannot be reliably electrodeposited in a single step . This necessitates the development of an alternative method in which AAO can serve as a template for the formation of perovskite nanowires.…”