Mn-doped Cu-Zn-In-S/ZnS nanocrystals: optical properties and their use as time-gated fluorescence probes

Harrison, Clay; Gallian, Brandon; Dong, Guoquan; Wang, Yu; Zhao, Jialong; Zhu, Xiaoshan

doi:10.1007/s11051-019-4666-3

Cited by 5 publications

(6 citation statements)

References 41 publications

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“…115 Using a synthesis approach similar to that of Mn-doped AgZnInS/ZnS NCs, Harrison et al developed Mn-doped CuZnInS/ZnS NCs and investigated how the NC luminescence properties were affected by the Cu and Mn levels in NCs. 116 Compared to AgZnInS/ZnS NCs, similar results were obtained for Mn-doped CuZnInS/ZnS NCs, and the same mechanism explanations for Mn-doped AgZnInS/ZnS NCs are applicable to Mn-doped CuZnInS/ZnS NCs regarding the effects of the Cu and Mn concentrations on the NC luminescence properties. However, the red shift of the absorption and luminescence spectra of Mn-doped CuZ-nInS/ZnS NCs are relatively less significant, and also their lifetimes are relatively longer, even when the Cu tuning range is the same as the Ag tuning range.…”

Section: Synthesis and Luminescence Mechanism Of Mn-doped Ncssupporting

confidence: 64%

“…Using a synthesis approach similar to that of Mn-doped AgZnInS/ZnS NCs, Harrison et al developed Mn-doped CuZnInS/ZnS NCs and investigated how the NC luminescence properties were affected by the Cu and Mn levels in NCs . Compared to AgZnInS/ZnS NCs, similar results were obtained for Mn-doped CuZnInS/ZnS NCs, and the same mechanism explanations for Mn-doped AgZnInS/ZnS NCs are applicable to Mn-doped CuZnInS/ZnS NCs regarding the effects of the Cu and Mn concentrations on the NC luminescence properties.…”

Section: Synthesis and Luminescence Mechanism Of Mn-doped Ncsmentioning

confidence: 90%

“…For such NCs, the origin of the short lifetime τ 1 of these NCs is still under debate. According to the literature, [113][114][115][116]119 the short lifetime τ 1 could result from Mn−Mn coupling or the interaction of Mn with the host lattice field. Its related magnitude (A 1 ) should indicate the degree of the interaction of between Mn and Mn or between Mn and the host NC.…”

Section: Acs Appliedmentioning

confidence: 99%

See 2 more Smart Citations

Review of Mn-Doped Semiconductor Nanocrystals for Time-Resolved Luminescence Biosensing/Imaging

Sreenan

Lee

Wan

et al. 2022

ACS Appl. Nano Mater.

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Colloidal semiconductor nanocrystals (NCs) have been developed for decades and are widely applied in biosensing/imaging. However, their biosensing/imaging applications are mainly based on luminescence-intensity measurement, which suffers from autofluorescence in complex biological samples and thus limits the biosensing/imaging sensitivities. It is expected for these NCs to be further developed to gain luminescence features that can overcome sample autofluorescence. On the other hand, time-resolved luminescence measurement utilizing long-lived-luminescence probes is an efficient technique to eliminate short-lived autofluorescence of samples while recording time-resolved luminescence of the probes for signal measurement after pulsed excitation from a light source. Despite time-resolved measurement being very sensitive, the optical limitations of many of the current long-lived-luminescence probes cause time-resolved measurement to be generally performed in laboratories with bulky and costly instruments. In order to apply highly sensitive time-resolved measurement for in-field or point-of-care (POC) testing, it is essential to develop probes possessing high brightness, low-energy (visible-light) excitation, and long lifetimes of up to milliseconds. Such desired optical features can significantly simplify the design criteria of time-resolved measurement instruments and facilitate the development of low-cost, compact, sensitive instruments for in-field or POC testing. Mn-doped NCs have recently been in rapid development and provide a strategy to solve the challenges faced by both colloidal semiconductor NCs and time-resolved luminescence measurement. In this review, we outline the major achievements in the development of Mn-doped binary and multinary NCs, with emphasis on their synthesis approaches and luminescence mechanisms. Specifically, we demonstrate how researchers approached these obstacles to achieve the aforementioned desired optical properties on the basis of the progressive understanding of Mn emission mechanisms. Afterward, we review representative applications of Mn-doped NCs in time-resolved luminescence biosensing/imaging and present the potential of Mn-doped NCs in advancing time-resolved luminescence biosensing/imaging for in-field or POC testing.

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Section: Synthesis and Luminescence Mechanism Of Mn-doped Ncssupporting

confidence: 64%

Section: Synthesis and Luminescence Mechanism Of Mn-doped Ncsmentioning

confidence: 90%

Section: Acs Appliedmentioning

confidence: 99%

See 1 more Smart Citation

Review of Mn-Doped Semiconductor Nanocrystals for Time-Resolved Luminescence Biosensing/Imaging

Sreenan

Lee

Wan

et al. 2022

ACS Appl. Nano Mater.

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“…Supplementary Tables S3–S5 present the optical parameters. Through comparing the parameters in these tables or comparing with other previous work [ 45 ], it can be seen that the Mn:CuGaS-ZnS (Cu/Ga = 1/8) NCs have better optical qualities (higher QYs and/or longer lifetimes). So, it could be concluded that the choice of host NC and Mn concentration do is critical to produce Mn-doped NCs with high-quality optical properties.…”

Section: Resultsmentioning

confidence: 96%

“…In Table 1 , it is observed that both the short lifetime and the long lifetime (thus the average lifetime) of Mn:CuGaS-ZnS NCs drops off when Cu/Ga ratio is increased from 1/8 to 1/4 (or the use of Cu in synthesis is double). An explanation is that when the Cu amount is increased in the NCs, the Mn dopants would have more Cu atoms in their surrounding environments and also be closer to the Cu atoms [ 45 ]. Thus, the interaction between Cu and Mn through their orbital electron clouds is stronger.…”

Section: Resultsmentioning

confidence: 99%

Optical Properties of Mn-Doped CuGa(In)S-ZnS Nanocrystals (NCs): Effects of Host NC and Mn Concentration

2022

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Time-gated fluorescence measurement (TGFM) using long-life fluorescence probes is a highly sensitive fluorescence-measurement technology due to the inherently high signal-to-background ratio. Although many probes for TGFM such as luminescent-metal-complex probes and lanthanide-doped nanoparticles are in development, they generally need sophisticated/expensive instruments for biosensing/imaging applications. Probes possessing high brightness, low-energy (visible light) excitation, and long lifetimes up to milliseconds of luminescence, are highly desired in order to simplify the optical and electronic design of time-gated instruments (e.g., adopting non-UV-grade optics or low-speed electronics), lower the instrument complexity and cost, and facilitate broader applications of TGFM. In this work, we developed Mn-doped CuGa(In)S-ZnS nanocrystals (NCs) using simple and standard synthetic steps to achieve all the desired optical features in order to investigate how the optical properties (fluorescence/absorption spectra, brightness, and lifetimes) of the Mn-doped NCs are affected by different host NCs and Mn concentrations in host NCs. With optimal synthetic conditions, a library of Mn-doped NCs was achieved that possessed high brightness (up to 47% quantum yield), low-energy excitation (by 405 nm visible light), and long lifetimes (up to 3.67 ms). Additionally, the time-domain fluorescence characteristics of optimal Mn-doped NCs were measured under pulsed 405 nm laser excitation and bandpass-filter-based emission collection. The measurement results indicate the feasibility of these optimal Mn-doped NCs in TGFM-based biosensing/imaging.

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Highly efficient Cu-In-Zn-S/ZnS/PVP composites based white light-emitting diodes by surface modulation

Chen

Xie

et al. 2021

Chemical Engineering Journal

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Mn-doped Cu-Zn-In-S/ZnS nanocrystals: optical properties and their use as time-gated fluorescence probes

Cited by 5 publications

References 41 publications

Review of Mn-Doped Semiconductor Nanocrystals for Time-Resolved Luminescence Biosensing/Imaging

Review of Mn-Doped Semiconductor Nanocrystals for Time-Resolved Luminescence Biosensing/Imaging

Optical Properties of Mn-Doped CuGa(In)S-ZnS Nanocrystals (NCs): Effects of Host NC and Mn Concentration

Highly efficient Cu-In-Zn-S/ZnS/PVP composites based white light-emitting diodes by surface modulation

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