MICROCHIMICA ACTA
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2022
·Vol. 189
·期 12
·1-10
·
IF 6.408
Sun Zhuo,Lu Juan,Zhang Xin,Shan Xiangyu,Wu Qian,Li Chao,Li Huiling,Yang Shuning,Tian Li
Electrospun nanofibers containing CdTe@ZnNi-metal–organic frameworks (CdTe@ZnNi-MOF NFs) were used for the first time in luminol-O 2 electrochemiluminescence (ECL) system to construct ECL sensor for chlorpyrifos (CPF) detection. Firstly, CdTe@ZnNi-MOF NFs obtained by blending method was used to modify the surface of a glassy carbon electrode, and then, the proposed solid-state ECL sensor was constructed by dropping luminol onto the surface of nanofiber benefiting from chitosan (CTS) viscosity. CdTe@ZnNi-MOF NFs with its large surface area and porosity can be used not only as luminol carrier but also as co-reaction promoter of the ECL system. The ECL sensor obtained satisfactory results in weakly alkaline solution under the synergistic action of CdTe@ZnNi-MOF NFs and luminol. The constructed ECL sensor can effectively detect CPF in the range 1.0 × 10 −14 –1.0 × 10 −9 M, and the detection limit was 6.23 × 10 −17 M (3 σ / m ). The constructed sensor was simple and sensitive, and can be used for the determination of CPF in vegetable samples. It not only broadened the application of MOFs in the field of ECL but also provided a new idea for expanding the application of the luminol-O 2 system. Graphical Abstract
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS AND SPECTROSCOPY
·
2015
·Vol. 118
·期 5
·748-755
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IF 0.723
Ge Baoyu,Li Zhigang,Xie Yuanzhe,Yang Lingling,Wang Ruiyong
Two novel and convenient methods for the determination of lincomycin (LCM) in aqueous solutions have been developed. The first method was based on the enhanced fluorescence of thioglycolic acidcapped CdTe quantum dots (TGA-CdTe QDs) by LCM. For the second method, the introduction of LCM could induce the aggregation of gold nanoparticles (AuNPs), displaying distinct changes in color and in UVvis spectra. Under optimal conditions, the enhanced fluorescence intensity was linearly proportional to LCM concentration in the range of 1–240 μg mL −1 with a detection limit of 2.63 × 10 −1 μg mL −1 . The second platform is capable of determining LCM in ranges from 1.00 × 10 −3 to 2.00 × 10 −2 μg mL −1 and from 3.00 × 10 −2 to 1.20 × 10 −1 μg mL −1 with a detection limit of 1.27 × 10 −4 μg mL −1 . Both methods were used for rapid detection of LCM in real samples with satisfactory results. Comparisons between the two methods were made.
研究领域:
分析化学
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纳米生物学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2015
·
IF 3.966
Penghuai Niu,Baocang Liu,Yingjun Li,Qin Wang,Alideertu Dong,Heting Hou,Li Zhang,Yuxi Gao,Jun Zhang
This paper developed a facile method to synthesize CdTe@SiO 2 /Ag nanocomposites by coupling uniform Ag nanoparticles on core–shell CdTe@SiO 2 quantum dots via simple impregnation of CdTe@SiO 2 functionalized with amino groups in Ag nanoparticle sols. The obtained CdTe@SiO 2 /Ag nanocomposites show efficient fluorescence and effective antibacterial activities. Besides, because of the existence of SiO 2 , the CdTe@SiO 2 /Ag nanocomposites manifest strong adhesive affinity and chemical stability, allowing the long-term preservation of fluorescence and affording affinity with latent fingerprints. Thus, the CdTe@SiO 2 /Ag nanocomposites are explored as alternative fluorescent markers for latent fingerprint detection to provide better resolution, high sensitivity, and antibacterial activities. Meanwhile, the CdTe@SiO 2 /Ag nanocomposites may be used as alternative fluorescent markers for enhanced latent fingerprint detection on a variety of object surfaces in criminal science for individual identification.
研究领域:
材料科学
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生物医学工程
·
刑事科学技术
✓ 已验证
DOI
高影响因子
Green Chemical Engineering
·
2024
·
IF 9.1
Taihang Zhou,Fen Qiao,Sen Qian,Shoaib Muhammad,Haitao Li,Yanzhen Liu
In the contemporary context, tetracycline is widely utilized as a prevalent antibiotic in various facets of life. However, the excessive use of antibiotics has caused visible environmental consequences. Henceforth, the scientific community has increasingly focused on developing catalysts that exhibit exceptional efficacy in the proficient degradation of tetracycline. In this study, a novel nanomaterial was developed to encapsulate CdTe quantum dots (QDs) with a SiO 2 shell. The distinct synthesis approach generated a composite material that showed heterogeneity and considerably increased the contact area with contaminants. Consequently, the transfer of photoelectron to the SiO 2 spheres was significantly improved, leading to a more efficient separation during the catalytic process. The study investigated how different factors, such as the loading of the catalyst, the initial concentration of tetracycline, pH levels, and the wight ratio of CdTe QDs (SiO 2 + CdTe QDs) affected the effectiveness of photocatalytic tetracycline degradation. The findings indicated that the optimal degradation efficiency was observed at a catalyst concentration of 0.25 g/L and a solution pH of 9, leading to an impressive degradation rate of 96% within a mere 2 h timeframe.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 4
·1-8
·
IF 2.983
Chen Lintao,Li He,Ling Luting,Guo Jiazhuang,Shen Haixia,Wang Cai-Feng,Chen Su
We report the in situ synthesis and interesting optical properties of graphene oxide–CdTe (GO–CdTe) nanocomposites, as well as their potential application in solar cells. By doping GO during the synthesis process of CdTe quantum dots (QDs), the as-prepared GO–CdTe nanocomposites have layered structure and CdTe QDs are well preserved on the layer with uniform distribution and no aggregation. The effects of different experimental conditions on the optical properties of GO–CdTe nanocomposite are investigated. Interestingly, the colors of GO–CdTe nanocomposite solutions under daylight are similar to their fluorescence color observed under ultraviolet (UV) light, distinct from those of pure CdTe QDs and GO/CdTe nanocomposites prepared by direct mixing of GO and CdTe QDs. In addition, we demonstrate the application of GO–CdTe nanocomposites for sensitized solar cells, which show enhanced photoelectric performance. Our findings may provide new insight into optical properties of QDs coupled with carbon nanomaterials.
研究领域:
材料科学
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纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Sifang Lv,Feng Chen,Chunyan Chen,Xiaoming Chen,Hang Gong,Changqun Cai
We report a rapid and facile resonance light scattering (RLS) technique that utilizes CdTe quantum dots (CdTe QDs) probe to detect microRNA-122. The RLS sensor is ingeniously designed with P1 and P2 , two cDNA sequence probes with partially complementary sequences to miRNA-122. The amine-modified P1 and P2 are coupled to the surface of QDs to form functional QDs-P1 and QDs-P2 conjugates, which are collectively referred to as QDs-P. The cDNAs hybridize with the target miRNA to rapidly induce the self-assembly of QDs probe and change RLS intensity. The proposed technique can detect miRNA-122 within 40 min. RLS intensity is enhanced in proportion with miRNA-122 concentrations of 0.16–4.80 nM and has a low detection limit of 9.4 pM. In addition, the assay satisfactorily detects miRNAs in human serum samples. Thus, the assay has considerable potential for the analysis of other interesting tumor makers.
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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2013
·
IF 2.144
Suyan Ying,Shumin Cui,Weiping Wang,Jiuju Feng,Jianrong Chen
A simple and sensitive method for detecting diprophylline (DPP) was developed based on the fluorescence quenching of glutathione-capped CdTe quantum dots (GSH–CdTe QDs) by using diprophylline in a KH 2 PO 4 –Na 2 HPO 4 medium. Parameters affecting the quenching efficiency, including types and pH of buffer solutions as well as temperature, reaction time, adding sequence, and interfering substances, were investigated and optimized. In optimum conditions, the calibration plot of the quenched fluorescence intensity F 0 / F with a DPP concentration range of 1.67×10 –6 mol L −1 to 1.33×10 –5 mol L −1 was linear. The detection limit (with signal to noise ratio of 3) for DPP was 2.24×10 –7 mol L −1 . The proposed method was successfully applied for detecting DPP in human serum. The recovery of the method was in the range of 87.41% to 117.94%. Finally, the possible quenching mechanism of GSH–CdTe QDs and DPP was also discussed.
研究领域:
分析化学
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药学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2014
·
IF 2.129
Yongqiang Cao,Ning Liu,Ping Yang,Ruixia Shi,Qian Ma,Aiyu Zhang,Yuanna Zhu,Junpeng Wang,Jianrong Wang
The polyvinylpyrrolidone (PVP) hybrid luminescent micro-/nanofibers doped with the novel hybrid SiO 2 -coated CdTe nanocrystals (HS-CdTe NCs) have been fabricated for the first time via the electrospinning technique. The morphologies and photoluminescence (PL) emissions of HS-CdTe/PVP micro-/nanofibers prepared by doping the HS-CdTe NCs with the different PL peak wavelength (571, 616, and 643 nm) in PVP fibers were investigated by optical and PL microscope. The results revealed that all the HS-CdTe/PVP hybrid fibers showed an ultralong length for several hundreds of micrometers and a relatively uniform diameter of 1000 ∼ 1200 nm. The hybrid fibers displayed a wavelength-tunable PL emission, determining by the PL of doped HS-CdTe NCs. Moreover, similar to the original PL properties of HS-CdTe NCs before the electrospinning, the HS-CdTe/PVP fibers also showed a series of superior PL properties, such as narrow and symmetry PL spectrum, high, and uniform brightness. For comparison purpose, we also prepared three CdTe/PVP hybrid fibers by doping the 553 nm, 600 nm, and 633 nm PL-emitting CdTe NCs respectively in PVP electrospinning fibers. The characterization results showed that, the obtained three CdTe/PVP hybrid fibers had a basically satisfactory micro-/nanofiber morphology with a long length and relatively uniform diameter, but all the fibers exhibited very weak PL emissions. The enormous contrast in PL properties between HS-CdTe/PVP and CdTe/PVP fibers should mainly be ascribed to the different connection modes of ligands with the NCs and the passivation effect of inert hybrid silica shell on HS-CdTe. It is hopeful that the high luminescent HS-CdTe/PVP micro-/nanofibers with the tunable PL peak wavelength would be a good candidate in the optical sensor , light-emitting devices (LEDs), nanometer-scale waveguides , and the other related photonic materials.
研究领域:
材料科学
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光学工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Analysis and Testing
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2017
·Vol. 2
·期 1
·90-97
·
IF 0
Wang Zhong-Xia,Li Qi-Le,Kong Fen-Ying,Wang Wei,Ding Shou-Nian
In this paper, dual-stabilizer-capped CdTe quantum dots were used as modulated photoluminescence (PL) sensors for the subpicomolar level detection of copper(II) (Cu 2+ ) and mercury(II) (Hg 2+ ) ions in aqueous solution for the first time. The dual-stabilizer-capped CdTe quantum dots were synthesized using mercaptopropionic acid (MPA) and sodium hexametaphosphate (SHMP) as surface-modified ligands via a convenient hydrothermal process. The researches showed a low interference response of the MPA-SHMP-capped CdTe quantum dots towards other metal ions. The highly efficient PL quenching ability in the presence of Hg 2+ or Cu 2+ ions due to the formed nonfluorescent metal complexes via robust Hg 2+ –O interaction with the carboxy oxygen elements of surface ligands of MPA, and on the basis of the competitive binding of the mercapto groups of the MPA between the CdTe quantum dots and the Cu 2+ ions, respectively, which allowed the analysis of Hg 2+ or Cu 2+ ions down to the picomolar levels. Under optimal conditions, the response of the MPA-SHMP-capped CdTe quantum dot PL intensity is linearly proportional to the Cu 2+ and Hg 2+ ion concentration ranging from 0.1 to 1000 and 0.3 to 1000 nM with a detection limit of 41.6 and 97.0 pM, respectively. The diagnostic capability and potential in practical applications of this method have been demonstrated by detecting Cu 2+ and Hg 2+ ions in environmental water samples.
研究领域:
分析化学
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环境科学
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纳米技术
✓ 已验证
DOI
TALANTA
·
2019
·
IF 4.916
Ning Xu,Mingxing Piao,Kamile Arkin,Lina Ren,Jinyu Zhang,Jiawei Hao,Yuxin Zheng,Qingkun Shang
Two different colors of water-soluble core-shell quantum dots CdTe/CdS (green and orange red) have been synthesized and characterized in this paper. The formation of core-shell quantum dots not only improves the fluorescence quantum yield , but also reduces the biological toxicity of quantum dots, and improves the fluorescence lifetime . Two novel fluorescent bioprobes, CdTe/CdS (λ em = 545 nm)-5-Fu and Bio-CdTe/CdS (λ em = 600 nm)-TAM, have been synthesized via the interaction of these two core-shell quantum dots with anticancer drugs (5-Fu) and P-gp inhibitors (TAM), respectively. These two fluorescent probes have been simultaneously used in fluorescence imaging of human breast cancer cells MDA-MB-231/MDR. It can be observed that under the action of P-gp inhibitors distributed on the cell membrane, anticancer drugs can be retained in cancer cells. According to the color of quantum dots on the probe, the visualization results of the action of anticancer drugs and P-gp inhibitors can be obtained. This study shows that to prepare functional bioprobes using core-shell quantum dots CdTe/CdS has great potential in the field of biomedical research such as anticancer drugs.
研究领域:
生物医学
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纳米技术
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xin Zhang,Li Tian,Kexin Wu,Zhuo Sun,Qian Wu,Xiangyu Shan,Yingjie Zhao,Ruizhan Chen,Juan Lu
An electrochemical luminescence (ECL) sensor for the detection of glucose was constructed by covering CdTe nanomaterials, ZIF-7 and glucose oxidase (GOD) on the electrode surface, respectively. CdTe and ZIF-7, as co-reaction promoters, could amplify ECL signals through synergy effect. The results demonstrated that ECL intensity increased when the concentration of glucose increased. Based on the change of ECL intensity, a method for the determination of glucose was established. Possible response mechanisms were also studied. The parameters of measurement conditions were optimized. The linear range of glucose was 2.0 × 10 −10 ∼ 2.0 × 10 −5 mol L −1 and the detection limit was 6.7 × 10 −11 mol L −1 under the optimal conditions. The constructed sensor had high sensitivity and selectivity. The results were satisfactory for the determination of glucose in real human serum samples.
研究领域:
分析化学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2025
·
IF 2
Van-Thao Ta,Duy-Khanh Nguyen,Xuan-Bach Nguyen,Phuong-Nam Nguyen,Sinh-Hung Nguyen,Xuan-Dung Mai
The development of a simple, cost-effective, and green method to synthesize CdTe quantum dots (QDs), which are a key nanomaterial in sensing, bioimaging, and immunofluorescence analysis is highly desirable. In this study, we used ammonia in lieu of common hydride reductant to synthesize CdTe QDs by simple refluxing aqueous solutions of cadmium salt, sodium tellurite, and 3-mercaptopropionic acid (MPA). The obtained CdTe QDs were characterized by absorption and photoluminescent spectroscopies, X-ray diffraction (XRD), and transmission electron microscope (TEM). The absorption window and the emission color of QDs were facile controlled over the green–red range by varying the refluxing time. As the QD size increased the crystal structure transformed from CdTe to a CdTeS alloyed form. The results demonstrated herein suggest a cost-effective method for production of CdTe QDs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
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