CHEMISTRY OF MATERIALS
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2015
·
IF 8.354
Zhe Xia,Jie Zhong,Meiying Leng,Long Hu,Ding-Jiang Xue,Bo Yang,Ying Zhou,Xinsheng Liu,Sikai Qin,Yi-Bing Cheng,Jiang Tang
Metal chalcogenide complexes (MCCs) have attracted considerable attention recently due to their high solubility in polar solvents, low-temperature decomposition to metal chalcogenide films, and service as ligands for colloidal nanocrystals (NCs). However, most of the MCCs were typically synthesized in the highly toxic and explosive hydrazine (denoted as hydrazine-MCCs), severely restricting the wide applications of MCCs. Here we present a versatile and environmentally benign water-based solution method for the preparation of various MCCs (denoted as water-MCCs) through directly dissolving a series of bulk V2VI3 chalcogenides (V = Sb, As and VI = S, Se, Te) in water with the presence of (NH4)2S at room temperature and ambient atmosphere. We further show that such water-MCCs can be readily processed into corresponding semiconducting thin films upon mild thermal treatment and then be extended to fabricate compositionally controlled semiconductor alloys with tunable band gaps (i.e., Sb2(S1–x,Sex)3, 0 ≤ x ≤ 1) through simple control of substrate temperature. Furthermore, we present that our water-MCCs, especially for Sb4S72–, can be utilized to serve as ligands for in-situ-synthesized water-based PbS quantum dots (QDs), achieving a homogeneous and stable aqueous QDs solution without needing further conventional secondary ligand exchange. Our study provides a general strategy for the synthesis of various MCCs using water as safer and more environmentally friendly solvent alternative to hydrazine, thus greatly enhancing the wide applications of MCCs in solution-processed inorganic semiconductors.
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TALANTA
·
2017
·
IF 4.162
Jiexia Chen,Guang-Chao Zhao
A signal-on photoelectrochemical (PEC) biosensor based on nano-encapsulant of ascorbic acid-loaded apoferritin - assisted for protease detection is described. The loaded ascorbic acid could be released from the central cavity of apoferritin into the buffer solution as sacrificial electron donor to capture the photo-generated holes of CdTe quantum dots when light is turned on. In this system, the biosensor relied on monitoring the photocurrent intensity as a result of enzymatic substrate proteolysis in the homogeneous aqueous solution. A low detection limit of 2.7 ng mL −1 for trypsin in the linear range from 30 to 450 ng mL −1 is achieved. We believe that such a sensing system not only holds the potential ability as a probe for trypsin activity assay, but also could be used for the corresponding inhibitor-screening. It might provide a potentially feasible alternative tool for determining trypsin in human serum in a clinical laboratory. The established method could open a different perspective for PEC enzyme detection and provide a new platform for future development of PEC analysis with other clinically important proteins.
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TALANTA
·
2017
·
IF 4.162
Miao Yu,Yang Lu,Zhenjiang Tan
In this work, a novel and facile ratiometric fluorescence probe was prepared for the visual detection of dopamine (DA). In this detection system, red-emission CdTe@SiO 2 (r-QDs@SiO 2 ) was used as steady core of the probe and inverse microemulsion method was applied to synthesize uniform r-QDs@SiO 2 , this step could protect CdTe from contacting with human skin directly. Polydopamine (PDA) acted as response signal to detect DA, a very handy method which just combined polyethyleneimine (PEI) with DA together to synthesize PDA, this way for synthesis of PDA was much time-saving and non-toxic than any other methods. Differently from traditional analysis processes, the products of this experiment were also the analysis substances in final. Under optimum measurement conditions, the dual-emission ratiometric fluorescence probe was used for detections of DA in a concentration ranged from 10 μM to 80 μM with a detection limit of 0.12 μM, with addition of DA the color of the probe changed from red to green watched by naked eyes. In addition, the developed probe was also used for detections of DA in human serum samples successfully. This study provides a simple, time-saving and non-toxic approach for detections of DA without the requirement of complex equipment.
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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.
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Crystals
·
2024
·Vol. 14
·期 8
·728
·
IF 2.4
Boyu Wang,Zhiyuan Jiang
Recently, there has been a growing interest in skutterudite (SKD) compounds containing electronegative elements such as Br, Cl, S, Se, and Te, owing to their increased diversity and the versatility of filler atoms. This study focused on the thermoelectric performance of a series of (Ni, Te) co-doped SKDs filled with the electronegative element S, denoted as SxNi0.4Co3.6Sb11.2Te0.8(x= 0, 0.1, 0.2, and 0.3). These compounds were prepared using a combination of a solid-state reaction and spark plasma sintering techniques. The results showed that (Ni, Te) co-doping introduced excess electrons in the SKD lattice, while the incorporation of the element S into the SKD voids optimized carrier concentration. This led to a considerable increase in the absolute Seebeck coefficient to 110.6 μV K−1at ambient temperatures. The presence of S fillers induced phonon resonance scattering and point scattering, which reduced lattice thermal conductivity and ultimately improved the thermoelectric figure of meritzT, which reached 0.93 for S0.3Ni0.4Co3.6Sb11.2Te0.8at 823 K.
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Advanced Electronic Materials
·
2024
·Vol. 10
·期 6
·2300809
·
IF 5.3
Abdul Basit,Jiwu Xin,Yubo Luo,Ji-Yan Y. Dai,Junyou Yang
Lead-free polycrystalline manganese telluride holds great potential in the development of waste heat recovery due to its fascinating physical properties. However, the poor thermoelectric (TE) performance in the p-type MnTe alloys always results from their inferior carrier concentration, leading to low power factor and high thermal conductivity which restrict the overall thermoelectric performance. In this work, the problem is solved by decoupling its electrical and thermal transports through the hole donor Ge-deficiency in MnTe + x mol.% GeTe (0 ≤ x ≤ 4) compounds. Intrinsically, extra GeTe in MnTe + x mol.% GeTe compound offers free charge carriers due to a narrow bandgap comparatively, realizing not only a full assessment of stimulated electrical performance but also an enhanced power factor. Moreover, benefiting from the nano-precipitates and tweed microstructures, the lattice thermal conductivity effectively reduces due to the intensive phonon scattering accordingly. Ultimately, a maximum ZT of ≈1.2 at 873 K in the 3 mol.% GeTe doped MnTe sample is realized.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Xin Fan,Xiaoqin Tian,Jianxin Chi,Jiao Zhao,Youjin Zheng,Fangbiao Wang,Lei Zhang,Qi Chen,Hongan Ma
In this paper, the electropositive-electronegative double-filled skutterudite, which is challenging or impossible to synthesize via conventional methods, was successfully prepared using a high-pressure and high-temperature (HPHT) method. The successful filling of Ba-S into the voids of the CoSb 3 crystal structure was confirmed through X-ray diffraction, enthalpy of formation calculations, and EDS spectral analysis. The experimental results indicate that the skutterudite material with porous structure has a lower thermal conductivity of 1.07 W m −1 K −1 at 773 K. The Callaway model fitting analysis revealed that the introduction of Ba, S, and Te enhances both point defect scattering and resonance scattering, thereby effectively reducing the lattice thermal conductivity Consequently, the sample achieves a maximum zT value of 1.44 at 773 K. This work provides novel insights into the study of thermoelectric properties in skutterudite materials.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Shuangshuang Tian,Liqiang Chen,Hong Zhang,Liangquan Sheng,Xinxin Wang,Deqian Huang
CdTe quantum dots (CdTe QDs) were synthesized using mercaptopropionic acid (MPA) as a stabilizer. The electrochemiluminescence (ECL) mechanism of CdTe QDs was examined at cathodic (−2.1 to 0 V) and anodic (0–1.5 V) potentials. Utilizing dissolved oxygen as a co-reactant for cathodic CdTe QDs, the addition of phenylephrine hydrochloride (PEH) triggers a burst effect on the intermediate OH at the electrode surface, resulting in a reduction of electron hole formation. Consequently, a novel method for detecting PEH in the concentration range of 0.2–10 μM has been developed. A strong linear correlation was observed between Lg C PEH and the ECL intensity ratio ( I/I 0 ) of cathodic CdTe QDs, with a detection limit of 37 nM. Tri- n -propylamine (TPrA) was utilized as a co-reactant for the anode of CdTe QDs. The addition of paliperidone (PP) occupies the oxidized vacancies of TPrA, leading to a diminished ECL signal. A new method was subsequently established to detect PP in the concentration range of 0.2 nM–1.0 μM with a detection limit of 18 pM. This method has been successfully applied to detect PEH in urine and in compound tropicamide eye drops, as well as to quantify PP content in paliperidone sustained-release tablets and serum, demonstrating excellent recovery and selectivity.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Bi Yuhe,Sun Jianhui,Cao Sheng,Li Qiuyan,Zheng Jinju,Yuan Xi,Wang Yunjun,Zou Bingsuo,Zhao Jialong
As next-generation display technologies, eco-friendly colloidal quantum dot light-emitting diodes have drawn great attention due to their excellent luminescence properties, along with their rapid development. However, practical applications of eco-friendly quantum dot light-emitting device remain challenging, primarily due to the inferior performance of green device, which still lag behind their red and blue counterparts. Herein, we present efficient green device based on interfacial potential-graded ZnSeTe quantum dots. Our findings show that this potential-graded structure alleviates interfacial lattice mismatch and strain, reducing structural deformation and misfit defects. The smoothed interfacial potential suppresses the nonradiative recombination processes, particularly Auger recombination revealed by excitation-intensity dependent ultrafast transient absorption kinetics. Consequently, the interfacial potential-graded quantum dots demonstrate highly efficient green quantum dot light-emitting diodes, with a peak external quantum efficiency of 21.7% at 520 nm and a corresponding current efficiency of 75.7 cd A −1 .
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TALANTA
·
2025
·
IF 6.1
Yanfei He,Dongdong Zhang,Qiong Wu,Gengan Du,Ruoting Liu,Xianqing Zhou,Yurong Zhang
Aflatoxin B1 (AFB1) has strong carcinogenicity, mutagenicity, and teratogenicity even at low concentrations, presenting a major risk to food safety and human health, hence, it is crucial to develop a sensitive detection technique for AFB1. Consequently, cadmium telluride (CdTe) quantum dots conjugated with AFB1 aptamers serve as fluorescent signal probes, whereas Fe 3 O 4 @UiO-66-NH 2 nanocomplexes are employed as magnetic carriers and fluorescence quenchers. Fe 3 O 4 @UiO-66-NH 2 reduces background signal interference, thereby enhancing detection sensitivity and Förster Resonance Energy Transfer (FRET) efficiency. We have developed a highly sensitive and selective magnetron fluorescence aptasensor based on FRET for the specific detection of AFB1. Under the ideal experimental conditions, the linear range of AFB1 is 0.001–200 ng/mL, with a linear equation of y = 0.16 x +0.65 (R 2 = 0.996), and the detection limit is 0.012 ng/mL. The aptasensor demonstrated superior selectivity, reproducibility, and stability for AFB1, the recoveries for real samples of corn and wheat ranged from 95 % to 103 %, demonstrating the feasibility and practicality of the sensor. Furthermore, the accuracy of the aptasensor was verified by comparison with the results of high performance liquid chromatography, indicating that the aptasensor holds significant potential for practical detection applications.
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ACS Nano
·
2024
·
IF 15.8
Yixin Hou,Pengfei Ma,Fei Long,Mingyang Liu,Yifan Zheng,Li Sun,Junjie Shi,Ke Niu,Jun Su,Yanan Ma,Yihua Gao
Air-rechargeable batteries integrating energy harvesting, conversion, and storage provide the most portable and popular approach to self-charging power systems. However, air-rechargeable batteries are currently mostly aqueous Zn-based battery systems in which it has remained a significant challenge to solve the low discharge capacities and poor cycling stability of chemical self-charging due to continuous insertion/extraction of large-size hydrated Zn2+. Herein, efficient Bi2Te3@C cathodes with an active carbon paper substrate are developed. Further ex situ characterization analysis confirms the energy storage mechanism regarding the coexistence of H+/Zn2+ coinsertion and conversion reaction in the aqueous Zn||Bi2Te3@C battery. Benefiting from the fast dynamics process attributed to the unique mechanism, a reliable energy supply is provided even in an extended temperature range from −10 to 45 °C. More importantly, Bi2Te3@C cathodes boost the superior and repeatable air-rechargeability. A discharge capacity of up to 264.20 mA h g–1 at 0.30 A g–1 is manifested after self-charging for 11.00 h. In addition, two quasi-solid-state battery devices are connected in series to continuously power a timer. After the device is discharged and then air self-charged for just a few seconds, an LED is lit.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Wanqiu Chen,Min Fang,Weiju Zhu,Cun Li
In this paper, a sensitive Gd 3+ aggregation-induced emission (AIE) fluorescent quantum dots probe for tetracycline detection was designed based on mercaptopropionic acid (MPA)-capped CdTe quantum dots (MPA-CdTe QDs). Gd 3+ can coordinate with the carboxyl groups on the surface of MPA-CdTe QDs, which triggers the aggregation-induced enhancement fluorescence emission effect. Notably, the fluorescence of Gd 3+ -modified MPA-CdTe QDs (Gd 3+ @MPA-CdTe QDs) is quenched by tetracycline (TC). This fluorescent probe exhibits excellent selectivity and sensitivity, achieving the limit of detection of 4.26 nM. Consequently, the MPA-CdTe QDs show an “on-off” fluorescence response. Tetracycline molecule coordinates with Gd 3+ in Gd 3+ @MPA-CdTe QDs, promoting further aggregation of the quantum dots and forming a network structure. Additionally, the inner filter effect (IFE) contributes to fluorescence quenching. The Gd 3+ @MPA-CdTe QDs probe can be applied for detecting TC in milk and tap water, demonstrating significant application potential. Furthermore, Gd 3+ @MPA-CdTe QDs can be utilized for TC detection in living cells.
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