Plasmon enhanced light–matter interaction of rice-like nanorods by a cube-plate nanocavity

Zhang, Hui; Chen, Huan; Zhang, Tingting; Mi, Xiaohu; Jiang, Zihe; Zhou, Ziming; Guo, Lei; Zhang, Ming; Zhang, Zhenglong; Liu, Ning; Xu, Hongxing

doi:10.1039/d1na00777g

Cited by 2 publications

(1 citation statement)

References 31 publications

(42 reference statements)

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“…The original CdSe/CdS NRs are synthesized via the seeded growth method according to the previous report. − In a typical synthesis of CdSe/CdS NRs, the length-to-diameter ratios can be altered by adjusting the size of the core and the proportion of the shell precursor. The size of the CdSe core could be adjusted by altering the temperature, reaction time, and type of phosphonic acid (ODPA or TDPA).…”

Section: Resultsmentioning

confidence: 99%

Surface-Ligand-Modified CdSe/CdS Nanorods for High-Performance Light-Emitting Diodes

Zhang

Kang

et al. 2023

ACS Omega

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Colloidal nanocrystals (NCs) play an important role in the field of optoelectronic devices such as photovoltaic cells, photodetectors, and light-emitting diodes (LEDs). The properties of NC films are strongly affected by ligands attached to them, which constitute a barrier for charge transport between adjacent NCs. Therefore, the method of surface modification by ligand exchange has been used to improve the electrical conductivity of NC films. However, surface modification to NCs in LEDs can also affect emission characteristics. Among NCs, nanorods have unique properties, such as suppression of nonradiative Auger recombination and linearly polarized light emission. In this work, CdSe/CdS nanorods (NRs) were prepared by the hot injection method. To increase the charge transport into CdSe/CdS NRs, we adopted ligand modification to CdSe/CdS NRs. Using this technique, we could shorten the injection barrier length between CdSe/CdS NRs and adjacent layers. It leads to a more balanced charge injection of electron/hole and a greatly increased current efficiency of CdSe/CdS NR-LEDs. In the NR-LEDs, the ligand exchange boosted the electroluminance, reaching a sixfold increase from 848 cd/m 2 of native surfactants to 5600 cd/m 2 of the exchanged n-octanoic acid ligands at 12 V. The improvement of CdSe/CdS NR-LED performance is closely correlated to the efficient control of charge balance via ligand modification strategy, which is expected to be indispensable to the future NR-LED-based optoelectronic system.

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Section: Resultsmentioning

confidence: 99%

Surface-Ligand-Modified CdSe/CdS Nanorods for High-Performance Light-Emitting Diodes

Zhang

Kang

et al. 2023

ACS Omega

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Statistical and Correlative Characterization of Individual Nanoparticle in Gap Plasmon Resonator Sensors

Poungsripong,

Kannampalli,

Santinacci

et al. 2024

Adv Materials Technologies

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Plasmonic nanocavities are receving increased attention from the nanophotonics, nanoelectronics, and quantum optics community due to their ability to confine light in extremely small volumes. Coupling colloidal plasmonic nanocrystals to metal films is an inexpensive approach to fabricate virtually unlimited individual resonators that can be tuned by adjusting nanoparticle size, gap thickness, and refractive index. The focus is on silver nanocubes separated from a gold mirror by thin amorphous dielectric layers (Al2O3, TiO2). The optical response is measured and correlative electron microscopy is performed on a large number (>800) of individual resonators to unveil the statistical distribution of gap plasmon modes and assess systematically their sensitivity. A sensitivity as large as 8 nm/nm to nanocube size variation, 50 nm/nm to Al2O3 thickness variation, and 130 nm/RIU for index change of the spacer layer is found. With the help of numerical simulations, this approach enables to infer a quantitative statistical distribution of molecular coatings present on the nanocubes surface, such as polyvinylpyrrolidone, which can affect the performance of nanoelectronic devices and assess the strategy to remove it. Finally, polarization‐resolved measurements enable to unveil a birefringent behavior when nanocubes are supported on annealed TiO2 layers (2–4 nm).

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Plasmon enhanced light–matter interaction of rice-like nanorods by a cube-plate nanocavity

Abstract: Plasmonic nanocavity is widely used for enhancing light-matter interaction. Here, an efficient plasmonic nanocavity of the cube-plate system is constructed for the fluorescence enhancement of rice-like CdSe/CdS Nanorods (NRs) with...

Cited by 2 publications

References 31 publications

Surface-Ligand-Modified CdSe/CdS Nanorods for High-Performance Light-Emitting Diodes

Surface-Ligand-Modified CdSe/CdS Nanorods for High-Performance Light-Emitting Diodes

Statistical and Correlative Characterization of Individual Nanoparticle in Gap Plasmon Resonator Sensors

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