Control of Localized Surface Plasmon Resonances in Metal Oxide Nanocrystals

Abstract

Metal oxides, when electronically doped with oxygen vacancies, aliovalent dopants, or interstitial dopants, can exhibit metallic behavior due to the stabilization of a substantial charge carrier concentration within the material. As a result, localized surface plasmon resonances (LSPRs) occur in nanocrystals of conducting metal oxides. Through deliberate choice of both the host material and the defect, these resonances can be tuned across the entirety of the near- and mid-infrared regions of the electromagnetic spectrum. Optical modeling has revealed that the defects present have profound impacts on charge carrier mobility and electronic structure, and in some cases, choosing one dopant over another is an important trade-off for optimizing plasmonic performance. These materials are distinct from classical metals in that one can tune their LSPR in energy and intensity through their elemental composition independently of any particular size or nanocrystal morphology. In addition, the LSPR in these materials is highly modulable through external stimuli over substantial spectral windows. As a result, these materials uniquely provide a responsive plasmonic material that can offer optimal nanocrystal arrangements and morphology without compromising the intended resonance frequency for light concentration at any infrared wavelength.

Gelation of plasmonic metal oxide nanocrystals by polymer-induced depletion attractions

“…All chemicals were used as received and without further purification. Indium acetate (In(ac) 3 ITO Nanocrystal Synthesis and Ligand-Stripping. ITO NCs were synthesized in an air-free environment using a standard Schlenk line technique following a procedure adapted from previous literature reports (51,52) .…”

“…Nanocrystals (NCs), owing to their unique and highly tunable optical properties (1)(2)(3)(4)(5) , hold promise as key constituents in next-generation optoelectronic materials and devices (1,(6)(7)(8)(9)(10) . Rich opportunities to enhance and diversify materials functionality motivate the development of multiscale NC architectures via bottom-up approaches (11) because the collective properties of NCs in assemblies depend on their organization.…”

Rechargeable Zn2+/Al3+ dual-ion electrochromic device with long life time utilizing dimethyl sulfoxide (DMSO)-nanocluster modified hydrogel electrolytes

“…[1][2][3][4] Recently, it was shown that nano-engineered electrochromic materials allow independent control of visible and near-infrared (NIR) light. [5][6][7] As promising as the eld is, integration of light and heat management by electrochromic modulation and energy storage into the same device has been limited to electrochromic supercapacitors. [8][9][10] In a new approach we have recently shown that battery functionality and the advantages of electrochromic electrodes can be combined in the same platform.…”

Large Scale Indium Tin Oxide (ITO) One Dimensional Gratings for Ultrafast Signal Modulation in the Visible

“…Heavily doped semiconductors are materials in which the carrier density is few orders of magnitude below the ones of metals [1][2][3][4][5][6]. Thus, these materials show a metallic behavior with a good conductivity.…”