INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
·
IF 4.084
Tao Wang,Xiqing Liu,Donglai Han,Yuxuan Sun,Changchang Ma,Yang Liu,Pengwei Huo,Yongsheng Yan
In this work, a biofiber was used as the natural polymer carrier to design a BiVO 4 QDs/cellulose fiber composite for photocatalytic application. The biofiber was obtained from bamboo, which was green, abundant and short growth cycle in Asia. Naturally rich groups of biofiber provided many sites to absorb the Bi 3+ to form the uniform distribution for BiVO 4 QDs . Moreover, a series of results indicated the strong connection was formed between biofiber and BiVO 4 QDs, which could increase the stability and electron transfer . Therefore, the new composite photocatalyst exhibited better stability and effectively photocatalytic activity . Moreover, the possible mechanism of synthesis and photocatalytic were discussed, which provided insight for synthesizing photocatalytic based on biomaterials.
研究领域:
材料科学
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环境科学
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生物学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
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2014
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IF 5.825
Chaoying Xu,Ronghui Zhou,Wenwei He,Lan Wu,Peng Wu,Xiandeng Hou
Fingerprints are unique characteristics of an individual, and their imaging and recognition is a top-priority task in forensic science. Fast LFP (latent fingerprint) acquirement can greatly help policemen in screening the potential criminal scenes and capturing fingerprint clues. Of the two major latent fingerprints (LFP), eccrine is expected to be more representative than sebaceous in LFP identification. Here we explored the heavy metal-free Mn-doped ZnS quantum dots (QDs) as a new imaging moiety for eccrine LFPs. To study the effects of different ligands on the LFP image quality, we prepared Mn-doped ZnS QDs with various surface-capping ligands using QDs synthesized in high-temperature organic media as starting material. The orange fluorescence emission from Mn-doped ZnS QDs clearly revealed the optical images of eccrine LFPs. Interestingly, N-acetyl-cysteine-capped Mn-doped ZnS QDs could stain the eccrine LFPs in as fast as 5 s. Meanwhile, the levels 2 and 3 substructures of the fingerprints could also be simultaneously and clearly identified. While in the absence of QDs or without rubbing and stamping the finger onto foil, no fluorescent fingerprint images could be visualized. Besides fresh fingerprint, aged (5, 10, and 50 days), incomplete eccrine LFPs could also be successfully stained with N-acetyl-cysteine-capped Mn-doped ZnS QDs, demonstrating the analytical potential of this method in real world applications. The method was also robust for imaging of eccrine LFPs on a series of nonporous surfaces, such as aluminum foil, compact discs, glass, and black plastic bags.
研究领域:
法医学
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材料科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 135
·期 6
·45831
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IF 1.86
Jing Zhang,Liqun Chen,Jiada Chen,Dan Wu,Jie Feng
We demonstrated an extremely facile way to fabricate inorganic–organic microgels with pH sensitivity and fluorescence. Aqueous dextran microgels are crosslinked by ZnO quantum dots (QDs). The ZnO@Dextran microgels were synthesized by simply mixing amino-modified ZnO (ZnO QDs) with carboxymethyl dextran (CMD) while stirring. The hybrid microgels showed an average diameter of ∼5 μm and strong fluorescence under ultraviolet (365 nm) irradiation. Up to 79.3 wt % of ZnO QDs were loaded into microgels. The ZnO QDs crosslinkage in the hybrid microgels structure enabled the microgels to degrade under mild acidic environment due to pH sensitivity of ZnO QDs. After loading of doxorubicin (Dox), the microgels were used as drug carriers for pH-controlled release of Dox. The degradation of the microgels and the release of loaded cargos could be monitored by detecting fluorescence intensity of the microgels. Moreover, owing to the cytotoxicity of ZnO QDs at their destination, drug-loaded ZnO@Dextran microgels can be used for synergistic therapy. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45831.
研究领域:
材料科学
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生物医学工程
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纳米医学
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DOI
高影响因子
MOLECULES
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2022
·Vol. 27
·期 7
·2097
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IF 4.927
Pu Li,Xiaoxiao Chen,Gaojun Wu,Zhe Wang,Chaobiao Huang
An ascorbic acid (AA) sensor was constructed based on the fluorescence resonance energy transfer (FRET) between CdS quantum dots (CdS QDs) and polydopamine (PDA) to detect trace AA sensitively. FRET occurred due to the broad absorption spectrum of PDA completely overlapped with the narrow emission spectrum of CdS QDs. The fluorescence of CdS QDs was quenched and in the “off” state. When AA was present, the conversion of DA to PDA was hindered and the FRET disappeared, resulting in the fluorescence of CdS QDs in an “on” state. Importantly, the degree of fluorescence recovery of CdS QDs displayed a desirable linear correlation with the concentration of AA in the range of 5.0–100.0 μmol/L, the linear equation isy=0.0119cAA+0.3113, and the detection limit is 1.16 μmol/L (S/N = 3,n= 9). There was almost no interference with common amino acid, glucose and biological sulfhydryl small molecules to AA. Trace amount of AA in vitamin C tablets were determined and satisfactory results were obtained; the recoveries were observed to be 98.01–100.7%.Keywords:CdS quantum dots;PDA;fluorescence resonance energy transfer;ascorbic acid
研究领域:
分析化学
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生物传感
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
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IF 5.999
Qiang Zhang,Shengbao Duan,Yinong Huang,Jingjing Tian,Jia Hu
By integrating the fluorescence of quantum dots (QDs) and Mn 2+ -pefloxacin mesylate (Mn 2+ -pefloxacin), a new type of dual-band fluorescence biosensor for high-efficiency and sensitive determination of double-stranded DNA (dsDNA) is developed. The biosensor is based on the fluorescence "OFF-ON" mode of both QDs and QDs-Mn 2+ -pefloxacin. The Mn 2+ -pefloxacin complex can quench the QDs fluorescence via photoinduced electron transfer (PET), and its fluorescence is also quenched. Due to the specificity and strong binding affinity of dsDNA for the Mn 2+ -pefloxacin complex, it can break the low fluorescent QDs-Mn 2+ -pefloxacin and restore the fluorescence of QDs and Mn 2+ -pefloxacin complex in their respective bands. Therefore, the dual-band fluorescence quantitative detection of dsDNA by QDs-Mn 2+ -pefloxacin can be achieved, while bovine serum albumin , single-stranded DNA, and bio-related ions do not yield similar results. Furthermore, the possible reaction mechanisms are systematically discussed. The detection limits (3δ/K) of herring sperm (hs) DNA in the fluorescence recovery bands of QDs and Mn 2+ -pefloxacin complex are 0.0142 and 0.0465 μg/mL, respectively. The developed biosensor was used for dsDNA detection in synthetic samples, and desirable results are obtained.
研究领域:
生物化学
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分子生物学
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分析化学
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DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2019
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IF 9.518
Feika Bian,Lingyu Sun,Lijun Cai,Yu Wang,Yuanjin Zhao,Shuqi Wang,Mengtao Zhou
As a new class of two-dimensional (2D) materials, molybdenum disulfide (MoS 2 ) has huge potential in biomedical area; while its applications in multiplex bioassays are still a challenge. Here, we present novel MoS 2 -integrated silica colloidal crystal barcode (SCCB) for multiplex microRNA (miRNA) screening. MoS 2 was adsorbed on SCCBs by electrostatic interaction , and quantum dots (QDs) decorated hairpin probes were coupled on MoS 2 by covalent linkage. As the MoS 2 could quench the QDs of the hairpin probes, they together formed a molecular beacon (MB) structure before the detection. When used in assays, target miRNA could form a double strand with the probe and made QDs keep away from MoS 2 sheets to recovery their fluorescence. Because the released QDs were positively correlated with the concentration of the hybridized nucleic acid , the target miRNAs could be quantified by measuring the fluorescence signal of the QDs on the SCCBs. In addition, by utilizing different MoS 2 -integrated structural color encoded SCCBs, multiplexed miRNA quantification could also be realized. Based on this strategy, we have demonstrated that several pancreatic cancer-related miRNAs could be selectivity and sensitivity detected with a detection limit of 4.2 ± 0.3 nM. These features make the MoS 2 -integrated SCCB ideal for many potential applications.
研究领域:
生物医学工程
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纳米技术
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癌症研究
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分子诊断
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
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2019
·Vol. 11
·期 32
·4137-4145
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IF 2.378
Feng Cui,Qianying Qiu,Gang Peng,Xiaoyan Li,Xi Liu,Xiaojun Chen
The microRNA family shows great promise for the diagnosis and prediction of different cancers as biomarkers, in which miRNA-155 (miR155) is recognized as a biomarker for lung cancer and thus has drawn much attention. Therefore, the development of specific and accurate methods to detect miR155 has become a potential research hotspot. In this work, we presented a fluorescence resonance energy transfer (FRET) technique by utilizing core–shell CdSeTe/ZnS quantum dots (QDs) as a signal reporter and a target recycling strategy as a signal amplifier for the detection of miR155. In the presence of miR155, part of the hairpin probe (HP) immobilized onto the surface of gold nanoparticles (AuNPs)@SiO2, could hybridize with it. Then, numerous H1-AuNPs@SiO2 could be produced with the aid of exonuclease III. With the linkage of the assistant chain A2, H1-AuNPs@SiO2 combined with A1-QDs and then the fluorescence (FL) signal of QDs was quenched by AuNPs@SiO2via FRET. The more miR155 present in solution, the weaker the detected FL signal. A linear response range of 0.01 fM to 1 nM and low detection limit of 3 aM were obtained using the proposed method. Furthermore, this method showed high specificity and satisfactory recovery between 93 and 105% in real human serum samples, illustrating its great potential for practical applications.
研究领域:
生物化学
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分子生物学
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癌症研究
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纳米技术
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分析化学
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产品关联
DOI
高影响因子
ANALYST
·
2020
·Vol. 146
·期 3
·949-955
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IF 3.978
Fan Lu,Yeling Yang,Yucheng Liu,Fubing Wang,Xinghu Ji,Zhike He
High concentration of uric acid is usually related to cardiovascular and cerebrovascular diseases. Developing a simple method for the rapid and efficient detection of uric acid has a great significance in clinical diagnosis. In this work, alginate hydrogel microspheres embedded with CdZnTeS QDs and urate oxidase (Alg@QDs-UOx MSs) were prepared for the first time, and further used for point-of-care testing (POCT) of patients with a high concentration of uric acid. This strategy is mainly based on visual detection of H2O2, the product of uric acid after an enzymatic reaction. The proposed sensor (Alg@QDs-UOx MSs) has several advantages. First, it can reduce the interference of the proteins to the fluorescence of QDs. Second, Alg@QDs-UOx MSs help improve the stability of the CdZnTeS QDs as well as the activity of urate oxidase during storage. Third, it is easy to use, has fast response speed, and is of low cost. Therefore, the proposed sensor shows good application prospects. Simply through the built-in camera of a smartphone, we can visualize the urine samples from patients with a high concentration of uric acid within 10 minutes, and the accuracy rates were 100%. In the range of 100.0 μM to 900.0 μM, the I/I0 values and uric acid concentrations are in a great linear relationship (R2 = 0.9973), indicating that this method can be employed for quantitative analysis of uric acid in human urine (<10 mM). The limit of detection (LOD) is 20.3 μM.
研究领域:
医学诊断
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生物传感器
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Huayan Yang,Yanmin Zhang,Jian Song,Meng Wang,Shaoning Yu,Liang Chen,Xiaomin Li,Shouning Yang,Lin Yang
The integration of photothermal therapy (PTT) with photodynamic therapy (PDT) has great potential to revolutionize conventional therapeutic approaches for cancers. However, most of the currently developed nanoplatforms for combinatorial phototherapy require the participation of different components or activation of separate lasers. Therefore, a desirable photoactive agent with intrinsic single laser-activated combinatorial phototherapy is still urgently needed for more efficient treatment. Here, we demonstrate a high-temperature organic synthesis, ligand exchange strategy to obtain ultrasmall, water-dispersible, and stable polylysine-bismuth sulfide quantum. dots (PLL-Bi 2 S 3 QDs). In addition to its strong near-infrared (NIR) absorption, the ultrasmall size and sulfide-enriched surface of the obtained Bi 2 S 3 QDs offer abundant photoelectrons with high reducing ability, promoting the rapid generation of reactive oxygen species (ROS). Therefore, excellent photothermal conversion and fast ROS generation ability can be concurrently realized upon 808 nm NIR laser irradiation. As proof of concept, the combined photothermal/photodynamic activity in single PLL-Bi 2 S 3 QDs was demonstrated both in vitro and in vivo , confirming that the phototherapeutic efficacy is dramatically greater than that of larger Bi 2 S 3 nanorods. In addition, toxicity screening showed that PLL-Bi 2 S 3 QDs possess excellent biocompatibility. Thus, the prepared PLL-Bi 2 S 3 QDs are expected to serve as a photoactive agent for efficient cancer treatment.
研究领域:
纳米技术
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癌症治疗
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 28
·13654-13662
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IF 5.8
Naiwei Wei,Hong Zhu,Danni Yan,Shuai Yang,Lili Xu,Shengli Zhang,Yuhui Dong,Yousheng Zou,Haibo Zeng
I–III–VI quantum dots (QDs) have gained widespread attention owing to their significant advantages of non-toxicity, large structural tolerance, and efficient photoluminescence potential. However, the disbalance of reactivity between the elements will result in undesired products and compromised optical properties. Reducing the activity of highly reactive group IB elements is the most common approach, but it will reduce the overall reactivity and lead to a wide dispersion of QD sizes. In this study, we propose a method to improve the overall reactivity of the reaction system using the highly active IIIA precursor InI3, which triggers rapid nucleation and promotes the formation of Ag(In,Ga)S2 (AIGS) QDs, resulting in monodisperse particle size distributions and a significantly improved photoluminescence quantum yield (PLQY) (from 12% to 72%). Furthermore, narrow band edge emission is realized by coating a gallium sulfide (GaSx) shell on the basis of obtaining high-quality AIGS QDs. The core/shell QDs exhibit a 90% PLQY with a full width at half maximum (FWHM) of only 31 nm at 530 nm. This study provides a viable design strategy to synthesize monodisperse AIGS QDs with a narrow peak width and efficient luminescence, promoting the application of AIGS QDs in the field of luminescent displays.
研究领域:
材料科学
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纳米技术
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光学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 28
·9804-9811
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IF 4.39
Zexin Li,Fenglei Sun,Haining Song,Haifeng Zhou,Yifei zhou,Zhenlei Yuan,Peng Guo,Guangjun Zhou,Qianqian Zhuang,Xiaoqiang Yu
Lead-free double perovskite has attracted widespread attention due to its good stability and non-toxicity. In this work, Cs2AgxNa1−xInCl6 quantum dots were synthesized via a thermal injection method using non-toxic precursors. Based on the wide spectrum of self-bound excitons, the quantum dots achieved white light emission. Bi-doped Cs2AgxNa1−xInCl6 quantum dots with excellent luminescence performance have the same cubic structure, and they have a larger Stokes shift. The cubic perovskite space group is Fmm, and [NaCl6], [AgCl6] and [InCl6] octahedrons alternately appear in the cubic structure. The photoluminescence quantum yield of Cs2AgxNa1−xInCl6 is improved by doping with a small amount of Bi; the PL QY increased to 57.3% with an obvious emission peak at 600 nm. The stability and luminescence intensity of perovskite QDs were further enhanced by SiO2 coating and a Cs2AgxNa1−xInCl6:Bi-SiO2 thin film was prepared using perhydropolysilazane as the precursor. The materials have huge application potential in the field of white light emission and display.
研究领域:
材料科学
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光学
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 43
·26930-26934
·
IF 3.108
Wei Liu,Huanhuan Li,Yanli Wei,Chuan Dong
A label free phosphorescence sensing platform for trypsin was developed employing Mn doped ZnS quantum dots (Mn-ZnS QDs) as the phosphorescence probe. Mn-ZnS QDs can emit strong room temperature phosphorescence. Upon addition of Cytochrome c (Cyt c), a hybrid complex between Mn-ZnS QDs and Cyt c was formed, and consequently, quenched the phosphorescence of Mn-ZnS QDs. In the presence of trypsin, Cyt c was hydrolyzed into small fragments, and accordingly, the quenched phosphorescence of Mn-ZnS QDs went back and high phosphorescence intensity was observed. As such, based on the phosphorescence signal changes of the system, a label free turn-on phosphorescence sensing platform was fabricated. Factors affecting the determination of trypsin including the concentration of Mn-ZnS QDs, reaction time, temperature and pH effect were comprehensively explored. Under the optimal experimental conditions the restored phosphorescence of the sensing system displayed a response for trypsin in the range of 0.88–15.6 μg mL−1 with a detection limit of 42 ng mL−1. Additionally, the sensing platform was successfully applied for the determination of trypsin in human serum samples with satisfactory recovery.
研究领域:
分析化学
·
生物传感器
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）