Designable Luminescence with Quantum Dot–Silver Plasmon Coupler

Hu, Lunzhen; Wu, Huizhen; Zhang, Bingpo; Du, Li; Xu, Tianning; Chen, Yongyue; Zhang, Yong

doi:10.1002/smll.201400094

Cited by 17 publications

(26 citation statements)

References 45 publications

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“…For the QD/Ag hybrid with CdZnS/ZnS or CdSe/ZnS QDs, almost no significant enhancement of the TSE was observed (Supporting Information, Figure S5). 15…”

Section: Resultsmentioning

confidence: 99%

“…10−14 The Ag film can both enhance the emission of the nearby QDs and influence the distribution of the BEE and the trap state emission (TSE). 15−17 We found that the CdS and CdSe QDs on the Ag film have enhanced TSE and that the TSE enhancement was related to the QD size and the annealing treatment; 15−17 these methods thus provide the post-synthetic modification of QD emission. It seems that the Ag-enhanced TSE of II–VI QDs is a physical effect related to the resonant plasmonic enhancement.…”

Section: Introductionmentioning

confidence: 99%

“…It seems that the Ag-enhanced TSE of II–VI QDs is a physical effect related to the resonant plasmonic enhancement. 15−17 Under this explanation, the resonant plasmons in the Ag nanostructure altered the decay process of the excited QD that resulted in the enhancement of TSE.…”

Section: Introductionmentioning

confidence: 99%

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Luminescence Change of CdS and CdSe Quantum Dots on a Ag Film

Zhu

et al. 2019

ACS Omega

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Enhanced luminescence of an emitter on a Ag film is usually ascribed to the resonant surface plasmons. In these studies, the solid cadmium sulfide (CdS) and cadmium selenide (CdSe) quantum dot/silver (QD/Ag) hybrids were prepared, and the luminescence characteristics of these QD/Ag hybrids were measured. It is found that the enhancement of the trap state emission (TSE) is related to the QD size. The TSE features of the annealed QD/Ag hybrids are insensitive to the morphology of the Ag film. We used the wet and dry methods to separate the QD and Ag components and found that the photoluminescence (PL) of the QD component was permanently changed from the initial state. The PL modification is ascribed to the Ag + doping effect rather than the surface plasmons. This doping method uses pure Ag as the Ag + ion source. In this case, though the CdS and CdSe QD/Ag hybrids are the solid state, the cation exchange between Ag + and Cd 2+ ions can still occur on the QD surface. Even a small amount of Ag can efficiently influence the luminescence of the QDs embedded in the poly(methyl methacrylate) matrix. A hypothetical model was proposed to explain the PL modification of the QD/Ag hybrid with and without annealing. Using this dry method for doping, the transparent luminescence label can be prepared easily, and the doped QDs can be further doped with Ag + dopants.

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“…For the QD/Ag hybrid with CdZnS/ZnS or CdSe/ZnS QDs, almost no significant enhancement of the TSE was observed (Supporting Information, Figure S5). 15…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Luminescence Change of CdS and CdSe Quantum Dots on a Ag Film

Zhu

et al. 2019

ACS Omega

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“…Giving a hybrid II-VI QDs-silver nanocrystal as example, the luminescence of the hybrid was shown by Lian Hu (Jiangnan University in Wuxi) and co-workers to be modifiable by tuning the ratio of the two components when mixing the components during synthesis quantitatively. [195] Such semiconductor-metal hybrids revealed unique photoelectric properties and became a platform to address exciton-plasmon coupling. [196] Generally, for quasi-0D materials, the high surface-to-volume ratios of QDs render the surface-related trap states crucial for the optoelectronic properties of the colloids.…”

Section: Nanoscale Systems and Characterization Techniquesmentioning

confidence: 99%

“…It is understood that the surface-states-related emission could be controlled in both the synthetic stage and the post-synthetic stage in solution. [63,195,197,198] Complementary to the various other spectroscopic measurement schemes used to obtain most of the information discussed about optoelectronic materials, material investigation is also possible with THz spectroscopy. Being a well-established technique nowadays, THz time-domain spectroscopy can be used for basic research as well as for non-destructive testing in the industry.…”

Section: Nanoscale Systems and Characterization Techniquesmentioning

confidence: 99%

Advances in Functional Nanomaterials Science

Rahimi‐Iman

2020

Annalen der Physik

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Technologies employing nanomaterials, such as electronics, optoelectronics, nanobiotechnologies, quantum optics, and nanophotonics, are perceived as the key drivers of investigations on novel and functional materials and their nanostructures for various applications. It is well understood that the study of such materials and structures has been of great importance for the optimization and development of electrical and optical devices. From such devices, one does not only expect higher efficiencies, but also access to the development of completely new concepts, which are strongly demanded by modern information‐processing, quantum, or medical technologies, and sensing applications. In this context, a wide range of aspects such as the physics of novel materials, as well as materials engineering, characterization, and applications are summarized here. Novel materials, which can be used, for instance, for energy harvesting or light generation, as well as for future logic devices; material engineering, which can lead to improved device functionality and performance in optoelectronics; material physics, the study of which allows insight to be gained into optical and electrical properties of nanostructured systems and quantum materials; and technologies/devices, addressing progress on the application side of sophisticated material systems and quantum structures, are highlighted using representative examples.

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