Copper-Ion-Assisted Precipitation Etching Method for the Luminescent Enhanced Assembling of Sulfur Quantum Dots

Li, Qile; Shi, Linxing; Du, Ke; Qin, Yong; Qu, Shu-Jie; Xia, De-Qian; Zhou, Zhen; Huang, Ziyun; Ding, Shou-Nian

doi:10.1021/acsomega.9b04465

Cited by 31 publications

(24 citation statements)

References 26 publications

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“…However, they did not receive intensive attention until Shen and co‐workers reported the use of elemental sulfur to prepare SQD in 2018 [21] . In the past two years, impressive progress has been made in the synthesis of luminescent SQDs from elemental sulfur, including increasing PLQY (from 3.8 % to about 50 %), shortening reaction time (from 125 h to 4 h) and increasing reaction yield (from 0.87 % to 5.08 %) [23–32] . However, considering the practical applications of SQDs, there are still some important issues that need to be addressed.…”

Section: Synthetic Methodsmentioning

confidence: 99%

“…In addition to H 2 O 2 , Li et al reported the use of Cu 2 + to enhance the PLQY of SQDs based on the post-etching treatment. [31] Similar to that of H 2 O 2 treatment, Cu 2 + was added to the aqueous dispersion of SQDs precursor, which was prepared according to the Shen's report. The PLQY of SQDs after treatment by Cu 2 + could reach as high as 32.8 %.…”

Section: Post-etching Synthesismentioning

confidence: 99%

“…[21] In the past two years, impressive progress has been made in the synthesis of luminescent SQDs from elemental sulfur, including increasing PLQY (from 3.8 % to about 50 %), shortening reaction time (from 125 h to 4 h) and increasing reaction yield (from 0.87 % to 5.08 %). [23][24][25][26][27][28][29][30][31][32] However, considering the practical applications of SQDs, there are still some important issues that need to be addressed. Firstly, the PLQY of SQDs is still much lower than commercially available QDs, such as CdTe QDs and CdSe QDs (generally higher than 50 % and even exceeding 90 %).…”

Section: Ultrasonication and Microwave Preparationmentioning

confidence: 99%

“…[33] Secondly, the emission color of SQDs is limited in the short wavelength region (e.g, blue and green emission), it is still very challenging to synthesize SQDs with red or near infrared emission. [23][24][25][26][27][28][29][30][31][32][33] In addition, overcoming the disadvantage of low reaction yield and achieving high conversion efficiency from elemental sulfur to SQDs for large-scale synthesis of SQDs is a challenge and of great importance.…”

Section: Ultrasonication and Microwave Preparationmentioning

confidence: 99%

“…[23] Ding et al reported that treating the surface SQDs with Cu 2 + could significantly promote the PLQY of SQDs. [31] On the other hand, most of the reported SQDs showed excitation wavelength-dependent emission behavior. For example, Arshad and Palashuddin found that when the excitation wavelength was changed from 350 to 460 nm, the corresponding emission wavelength of SQDs varied from 450 to 496 nm, respectively.…”

Section: Photoluminescencementioning

confidence: 99%

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Luminescent Sulfur Quantum Dots: Synthesis, Properties and Potential Applications

2020

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Sulfur quantum dots (SQDs) represent a new class of luminescent nanomaterials. They have shown great potential in numerous application fields including sensing, cell imaging, photocatalysis, light emitting diodes and polymer nanocomposites, due to their unique composition, favorable optical properties, low toxicity, fine processability and low cost. This Minire-view summarizes the recent research progress on the synthesis, characterization, properties and applications of SQDs, especially those synthesized from elemental sulfur. Critical yet unsolved issues in the synthesis and applications of SQDs are also discussed. In addition, an outlook for future research trends of SQDs is presented.

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Section: Synthetic Methodsmentioning

confidence: 99%

Section: Post-etching Synthesismentioning

confidence: 99%

Section: Ultrasonication and Microwave Preparationmentioning

confidence: 99%

Section: Ultrasonication and Microwave Preparationmentioning

confidence: 99%

Section: Photoluminescencementioning

confidence: 99%

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Luminescent Sulfur Quantum Dots: Synthesis, Properties and Potential Applications

2020

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Polyvinyl Alcohol Enhanced Fluorescent Sulfur Quantum Dots for Highly Sensitive Detection of Fe³⁺ and Temperature in Cells

Lei

Huang

Gao

et al. 2021

Part & Part Syst Charact

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cannot endow the SQD with enough stability. The prepared SQDs generally exhibit poor optical stability, limiting their down-to-earth applicability. For example, the fluorescent intensity of PEG-capped SQDs declined by 48% after exposure to UV lamp for 10 min. [4] In this context, it is very important and urgent to develop a simple and effective approach to enhance the optical stability of SQDs.As a kind of essential trace ion in organism, Fe 3+ plays an important role in numerous metabolic processes, such as enzyme catalysis, oxygen exchange, and transport. [13] Excessive or deficiency of Fe 3+ may result in a series of diseases (e.g., heart failure and anemia), and thus monitoring of Fe 3+ is quite meaningful for early clinical diagnosis. [14] On the other hand, temperature is a critical physical parameter that can affect the behavior of chemical and biological systems. Hence, the development of temperature sensor to monitor temperature in diverse environments especially in biosystem is highly needed. Among various technologies for monitoring of Fe 3+ or temperature, much attention has been paid on fluorescence detection because of its advantages of facile sample treatment process, superior sensitivity, rapid response, noninvasiveness, and low cost. [15,16] In recent years, a variety of fluorescent materials such as semiconductor quantum dots, silicon nanocrystals, metal nanoclusters, organic dyes, conjugated polymers, and carbon dots have been developed to detect Fe 3+ or temperature. [17][18][19][20][21][22][23][24] Unfortunately, most of them are either toxic or suffer from poor stability and high cost, which seriously hinders their practical applications. In addition, many fluorescent materials exhibit poor aqueous solubility or dispersibility, so their ability to detect Fe 3+ or temperature in biological environment (e.g., cells) is greatly limited. Therefore, the rational design and preparation of desired fluorescent probes to detect Fe 3+ or temperature in biological environment remain a challenge and is valuable.In this contribution, we attempt to utilize water-soluble and biocompatible polyvinyl alcohol (PVA) as ligand for fabricating fluorescent SQDs (Figure 1). PVA was carefully chosen because each PVA macromolecule contains a number of lateral hydroxyl groups, which can provide strong affinity interaction with the surface of formed SQDs to enhance the stability of SQDs. On the other hand, there is a strong complex interaction between As a new class of metal-free fluorescent dots, sulfur quantum dots (SQDs) have attracted more and more attention because of their unique properties and promising applications in many fields. However, synthesizing SQDs with high optical stability and stimuli-responsive fluorescence is still in its infancy. Herein, a simple one-pot strategy is reported for preparing polyvinyl alcohol (PVA)-capped SQDs from cheap elemental sulfur by employing PVA as ligand. The as-prepared SQDs with size in range of 1.5-5 nm show fine water dispersibility and stability, bright fluorescence,...

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Shaping Sulfur Precursors to Low Dimensional (0D, 1D and 2D) Sulfur Nanomaterials: Synthesis, Characterization, Mechanism, Functionalization, and Applications

Wei

Guo

et al. 2023

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Low‐dimensional sulfur nanomaterials featuring with 0D sulfur nanoparticles (SNPs), sulfur nanodots (SNDs) and sulfur quantum dots (SQDs), 1D sulfur nanorods (SNRs), and 2D sulfur nanosheets (SNSs) have emerged as an environmentally friendly, biocompatible class of metal‐free nanomaterials, sparking extensive interest in a wide range application. In this review, various synthetic methods, precise characterization, creative formation mechanism, delicate functionalization, and versatile applications of low dimensional sulfur nanomaterials over the last decades are systematically summarized. Initially, it is striven to summarize the progress of low dimensional sulfur nanomaterials from versatile precursors by using different synthetic approaches and various characterization. Then, a multi‐faceted proposed formation mechanism with emphasis on how these different precursors produce corresponding SNPs, SNDs, SQDs, SNRs, and SNSs is highlighted. Besides, it is essential to fine‐tune the surface functional groups of low dimensional sulfur nanomaterials to form new complex nanomaterials. Finally, these sulfur nanomaterials are being investigated in bio‐sensing, bio‐imaging, lithium–sulfur batteries, antibacterial activities, plant growth along with future perspective and challenges in emerging fields. The purpose of this review is to tailor low dimensional nanomaterials through accurately selecting precursors or synthetic approach and provide a foundation for the formation of versatile sulfur nanostructure.

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Copper-Ion-Assisted Precipitation Etching Method for the Luminescent Enhanced Assembling of Sulfur Quantum Dots

Cited by 31 publications

References 26 publications

Luminescent Sulfur Quantum Dots: Synthesis, Properties and Potential Applications

Luminescent Sulfur Quantum Dots: Synthesis, Properties and Potential Applications

Polyvinyl Alcohol Enhanced Fluorescent Sulfur Quantum Dots for Highly Sensitive Detection of Fe³⁺ and Temperature in Cells

Shaping Sulfur Precursors to Low Dimensional (0D, 1D and 2D) Sulfur Nanomaterials: Synthesis, Characterization, Mechanism, Functionalization, and Applications

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Copper-Ion-Assisted Precipitation Etching Method for the Luminescent Enhanced Assembling of Sulfur Quantum Dots

Cited by 31 publications

References 26 publications

Luminescent Sulfur Quantum Dots: Synthesis, Properties and Potential Applications

Luminescent Sulfur Quantum Dots: Synthesis, Properties and Potential Applications

Polyvinyl Alcohol Enhanced Fluorescent Sulfur Quantum Dots for Highly Sensitive Detection of Fe3+ and Temperature in Cells

Shaping Sulfur Precursors to Low Dimensional (0D, 1D and 2D) Sulfur Nanomaterials: Synthesis, Characterization, Mechanism, Functionalization, and Applications

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Polyvinyl Alcohol Enhanced Fluorescent Sulfur Quantum Dots for Highly Sensitive Detection of Fe³⁺ and Temperature in Cells