Publication Date:
2020
Description:
〈h3〉Abstract〈/h3〉
〈p〉Semiconductor nanocrystals (NCs) heavily doped with cation/anion vacancies or foreign metal ions can support localized surface plasmon resonance (LSPR) in the near-infrared (NIR) and mid-infrared (MIR) spectral wavelengths. Typically, nonstoichiometric copper sulfide Cu〈sub〉2−〈em〉x〈/em〉〈/sub〉S NCs with different 〈em〉x〈/em〉 values (0 〈 〈em〉x〈/em〉 ≤ 1) have attracted numerous attention because of hole-based, particle size, morphology, hole density and crystal phase-dependent LSPR. In spite of excited development of methodology for LSPR manipulation, systematic LSPR tuning of Cu〈sub〉2−〈em〉x〈/em〉〈/sub〉S NCs with a special crystal phase has been limited. Herein, roxbyite Cu〈sub〉1.8〈/sub〉S nanodisks (NDs) were selected as a model and their LSPR was readily tuned by particle size, hole density via chemical oxidation and reduction, self-assembly and disassembly in solution and plasmon coupling in multilayer films. Particle size, hole density and plasmon coupling severely affect their LSPR peak position and absorption intensity. Therefore, the ability of flexible LSPR tuning gifts roxbyite Cu〈sub〉1.8〈/sub〉S NDs great potential in plasmonic applications, including photocatalysis, photothermal agent, two-photon photochemistry and many others in NIR and MIR regions.〈/p〉
Print ISSN:
0022-2461
Electronic ISSN:
1573-4803
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
