JOURNAL OF CRYSTAL GROWTH
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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
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2015
·
IF 2.719
Qi Liu,Aizhen Huang,Nan Wang,Guan Zheng,Lihua Zhu
Analysis of perfluorooctanoic acid (PFOA) usually requires a combination of high-performance liquid chromatography and mass spectrometry , which is expensive and time-consuming. In the present work, water-soluble CdS quantum dots (QDs) were employed to develop a simple and rapid fluorometric method for the determination of PFOA. Strongly fluorescent CdS QDs were prepared by using 3-mercaptopropionic acid (MPA) as a stabilizer . It was observed that PFOA strongly quenched the fluorescence emission of the MPA-CdS QDs because PFOA promotes the aggregation of MPA-CdS QDs through a fluorine–fluorine affinity interaction. Under optimum conditions, the fluorescence intensity of MPA-CdS QDs was observed to decrease linearly with an increase in the concentration of PFOA from 0.5 to 40 μmol L −1 , with a limit of detection of 0.3 μmol L −1 . This new method was successfully implemented for the analysis of PFOA-spiked textile samples, with recoveries ranging from 95% to 113%.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
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2014
·Vol. 4
·期 48
·25183-25188
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IF 3.708
Meihua Wang,Weifen Niu,Xin Wu,Lixia Li,Jun Yang,Shaomin Shuang,Chuan Dong
3-Mercaptopropionic acid (MPA)-capped ZnS:Cu/ZnS core/shell quantum dots (QDs) have been synthesized via a facile aqueous coprecipitation method and characterized by fluorescence, UV-Vis absorption, infrared spectroscopy and transmission electron microscopy. The fluorescence of ZnS:Cu/ZnS could be increased in the presence of uric acid (UA). The affecting factors for the fluorescence of ZnS:Cu/ZnS were examined including pH, temperature and reacting time. Under the optimized conditions, the fluorescence intensity of the ZnS:Cu/ZnS QDs against the UA concentration showed a linear response in the range of 0.66 μM to 3.3 μM with the correlation coefficient (R2) 0.9973 and the limit of detection 0.044 μM. Most relevant molecules and physiological ions had no effect on the detection of UA. The feasibility of the developed method was further demonstrated by determining the concentration of uric acid in human urine samples and the recoveries were 95% ∼ 103%. Our work provides a sensitive, selective and convenient fluorescence method to determine UA in real samples.
研究领域:
分析化学
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纳米医学
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生物传感器
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临床检验
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分子诊断
✓ 已验证
DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 28
·21504-21510
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IF 3.84
Xiaojuan Zhao,Fengxia Li,Qingyan Zhang,Zengbo Li,Yehong Zhou,Jun Yang,Chuan Dong,Junping Wang,Shaomin Shuang
Mn-doped ZnS quantum dots capped with 3-mercaptopropionic acid (MPA) were synthesized by a facile method in aqueous solution as a ratiometric fluorescent (I590 nm/I458 nm) probe for curcumin. Curcumin caused defect-related fluorescence quenching of the probe at 458 nm, whereas the orange transition emission of the probe at 590 nm changed only negligibly with variations in curcumin concentration. The MPA-assembled Mn-doped ZnS quantum dots were used for the simple, sensitive and non-toxic determination of curcumin. Under the optimized conditions, the response to curcumin was linear in the range 0.16–16.9 μM with a detection limit of 37 nM. The method was successfully applied to the determination of trace amounts of curcumin in urine samples with recoveries of 97.73–109.73%.
研究领域:
分析化学
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材料科学
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生物医学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 6
·929-936
·
IF 1.9
Fan Zhang,Miaomiao Chen,Haiqing Zhang,Huayu Xiong,Wei Wen,Xiuhua Zhang,Shengfu Wang
A sensitive, convenient and rapid fluorescent sensor for effectively and directly detecting propranolol was proposed based on the fluorescence suppression of 3-mercaptopropionic acid stabilized CdTe quantum dots. The fluorescence suppression mechanism between CdTe QDs and propranolol was studied by time-resolved fluorescence spectroscopy, UV-Vis spectroscopy and fluorescence spectroscopy, and it was attributed to the simultaneous action of the inner filter effect (IFE) and dynamic quenching effect (DQE). The effects of the concentration of quantum dots, pH value of buffer solution and incubation time on the fluorescence signal of the propranolol/CdTe quantum dot system were also investigated. The results indicated that, when the experiment was conducted under optimal experimental conditions, the linear range of this assay was 0.1 μM to 2 μM and 5 μM to 200 μM, with a corresponding detection limit of 0.055 μM. Moreover, some common drug excipients and analogues of propranolol and stimulants had no apparent effect on the determination of propranolol. The proposed fluorescent sensor could be readily used for effectively and directly detecting propranolol in biological samples.
研究领域:
分析化学
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生物医学
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产品关联
DOI
高影响因子
LUMINESCENCE
·
2019
·Vol. 35
·期 2
·203-207
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IF 1.691
Junfeng Qu,Han Jiang,Shuhong Xu,Chunlei Wang,Dayan Ban
The emission wavelength of organic–inorganic hybrid perovskite quantum dots (QDs) can be tuned by controlling reaction time relevant to the halide exchange. It is because halide exchange with different time would lead to different molar ratio of halides in perovskite QDs such as Cl and Br. Here, to research the ligand's effect on the halide exchange, this work synthesized 3-mercaptopropionic acid (MPA)-capped CH 3 NH 3 PbBr x Cl 3-x QDs. It was found that SH − of MPA appeared to inhibit the halide exchange during the reation. Moreover, although the MPA-capped CH 3 NH 3 PbBr x Cl 3-x QDs did not contain the chiral centre, they exhibit the optical rotation. This may provide a method for chirality manipulation of perovskite.
研究领域:
材料科学
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光学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
·
IF 4.758
Shiyue Bian,Chao Shen,Yuting Qian,Jiyang Liu,Fengna Xi,Xiaoping Dong
Sulfur-doped graphene quantum dots (S-GQDs) with bright blue emission have been prepared by a facile one-pot hydrothermal treatment. A specific compound, 1,3,6-trinitropyrene, which has a mother nucleus structure similar with graphene, was chosen as the carbon source and 3-mercaptopropionic acid (MPA) was employed for S-doping and carboxyl groups modification. The synthesized S-GQDs were characterized by atomic force microscopy (AFM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and fluoscence (FL) spectrum. Results indicated that S-GQDs possessed single layer graphene structure with mean size of about 2.5 nm and presented an excitation-independent photoluminescence behavior with maximum excitation/emission wavelength at 360/450 nm, respectively. The sulfur-doping of GODs drastically improved their electronic and chemical properties, which afforded the S-GQDs a sensitive response to Ag + ions. Furthermore, the S-GQDs were successfully explored as a sensing probe for Ag + detection with high sensitivity and selectivity. A wide linear range of 0.1-130.0 μM with a low detection limit of 30 nM was obtained. The facile preparation method and the high performace of the as-prepared S-GQDs present promising potential for their applications in sensing, biological imaging and catalysis.
研究领域:
材料科学
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分析化学
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环境科学
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产品关联
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 11
·115503
·
IF 2.025
Liu Liu,Yijie Zhao,Guowei Zhi,Lihui Cao,Wei Wang,Luanhong Sun,Yuxuan Che
CuSbS2 is a direct p-type semiconductor with a two-dimensional layered structure of orthorhombic system, excellent electrical performance, and a band gap of 1.1–1.5 eV, which has a light absorption coefficient of more than 104cm−1 in the visible light range. CuSbS2 particles were synthesized by microwave irradiation method, and the effects of different sulfur sources on the phase structure, morphology and electrochemical performance of CuSbS2 particles were studied. The results showed that the sample prepared by thiourea as sulfur source was CuSbS2 phase, and the morphology was composed of flower-like microspheres and rod-like particles. However, nanorod-like CuSbS2 particles were obtained using L-cysteine or 3-thiopropionic acid as sulfur sources, and the phase of samples contained CuSbS2 and Sb2S3 phase. Electrochemical tests showed that L-cysteine based CuSbS2 particles had the largest photocurrent response, a photocurrent density of 1.03 μA cm−2 and impedance of 14.66 Ω.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhisheng Li,Chaoqi Hao,Chuantong Cheng,Zhaowei Zhu,Mengjie Zhang,Yuehua Li,Liting Huang,Bao Zhang,Xu Zhang
s HgTe quantum dots (QDs) are promising for infrared optoelectronic applications due to their size-tunable bandgap and solution-processable nature. However, conventional synthesis methods often result in aggregation and instability, limiting their practical use. This study presents a strategy to improve the dispersibility of HgTe QDs by using mercuric iodide (HgI₂) as the mercury precursor and 3-mercaptopropionic acid (MPA) in combination with oleic acid as the ligands during the quenching stage. Comparative experiments showed that MPA-treated QDs exhibited improved dispersion, with a reduced hydrodynamic diameter (~135 nm) compared to those without MPA (~180 nm). Additionally, photoconductive devices fabricated with MPA-treated QDs demonstrated significantly better performance. These devices exhibited higher switching ratios and responsivity, reflecting the improved dispersion and surface stabilization of the QDs, which enhanced charge transport efficiency and reduced recombination losses. This work provides an effective approach for controlling dispersion and enhancing the performance of HgTe QDs for infrared optoelectronics.
研究领域:
材料科学
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纳米科技
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半导体物理
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光电功能材料
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胶体化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Zhichao Shang,Mi Feng,Ming Jiang,Zhencai Zhang,Sihao Liu,Shijie Wang,Fei Xu
Bisphenol compounds play a pivotal role as essential diol monomers in the synthesis of numerous engineering plastics. However, conventional methods for their preparation often involve the use of concentrated inorganic acids, leading to significant environmental pollution and equipment corrosion. Herein, we developed a strong inorganic acid-free synergistic catalytic system consisting of a Lewis–Brønsted acid catalyst composed of ZnCl2 and 3-mercaptopropionic acid. This system enabled the highly efficient preparation of bisphenol compounds through the Friedel–Crafts alkylation reaction of ketones with phenols or phenoxyethanol. The highest selectivity of 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene can reach 96.4% at 110 °C for 2 h, which was higher than that of the traditional sulfuric acid method with a selectivity of 85.0%. A mechanistic study revealed that the carbonyl group of the ketone was first activated by the coordination ability of Zn2+ from the Lewis acid, which facilitated the subsequent protonation process initiated by the acidic site of Brønsted acid.
研究领域:
化学
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催化
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2011
·
IF 3.37
Min Sun,Bin Ding,Jianyong Yu,You-Lo Hsieh,Gang Sun
A highly sensitive coating comprising 3-mercaptopropionic acid (MPA) monolayer modified electrospun polystyrene (PS) membranes was constructed on the electrode of quartz crystal microbalance (QCM) for Cu 2+ detection. The three-dimensional fibrous PS membranes with high specific surface area (SSA) were deposited on the electrode of QCM via electrospinning. The PS membranes were sputter coated with gold, then modified with self-assembled monolayer of MPA. The PS-MPA sensors showed fast response (2–3 s) to Cu 2+ and a detection limit down to 100 ppb. Additionally, sensor sensitivity increased concurrently with both increasing PS loading and SSA on QCM electrodes . The response of the PS-MPA sensors with a PS membrane loading of 978 Hz and SSA of 43.31 m 2 /g was 40 times larger than that without membranes when exposed to 1 ppm of Cu 2+ . The sensor responses were reproducible toward Cu 2+ in the 100–5 ppm concentration range, whereas a linear response was found in the 100–1 ppm concentration range. The sensor response to Cu 2+ showed a linear relationship with an increase in pH from 2 to 7. Moreover, the sensors also exhibited chelation selectivity for other transition metal ions in the descending order Cu 2+ > Ni 2+ > Zn 2+ > Fe 2+ at concentration between 1 and 5 ppm.
研究领域:
分析化学
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环境监测
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材料科学
·
生物传感器
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纳米技术
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重金属检测
·
表面功能化
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2024
·
IF 3
Yushan Li,Jiao Men,Guangyan Zhou,Yanhong Qiao,Jingbo Zhang
To reveal the ways and causes of conversion efficiency enhancement for quantum dot-sensitized solar cells (QDSSCs), chalcopyrite structure CuInS 2 quantum dots (QDs) was synthesized in oil phase by the high temperature hot injection method. Then, QDs were transferred from oil phase to water phase with 3-mercaptopropionic acid as a ligand exchange reagent and loaded inducer of QDs. 3-mercaptopropionic acid coated QDs in water phase were sensitized on TiO 2 nanocrystalline thin films to fabricate QDSSCs. The sensitization time of QDs and pH value in QDs solution are two important factors to affect the loading amounts of QDs and performance of the final assembled QDSSCs. Long-time sensitization of QDs on the TiO 2 porous thin film will cause QDs to agglomerate and stack on the film. The pH of QDs aqueous solution influences the stable existence in solution of QDs and adsorption on the surface of TiO 2 . By balancing the influence of the above two factors, the optimal sensitization condition of CuInS 2 QDs is adsorption in pH = 11 QDs solution for 2 h. In addition, the interface between QD-sensitized TiO 2 porous thin film and FTO is another factor to affect the photoelectric conversion efficiency of QDSSCs. By adding Zn-doped TiO 2 compact layer with high conductivity and electron mobility on QDSSCs to modify this interface, the photoelectric conversion efficiency of QDSSCs was further increased by 66.4 %.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）