DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 20
·6824-6833
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IF 4.052
Changchang Ma,Xin Gao,Tao Wang,Rongru Chen,Zhi Zhu,Pengwei Huo,Yang Liu,Yongsheng Yan
The cobalt doped cadmium selenide/biomass carbon spheres (Co-CdSe/BCS) photocatalyst is easily prepared using a transitory hydrothermal reaction lasting 40 min. The Co-CdSe/BCS photocatalyst is constructed using the in situ growth of Co-CdSe nanodots on the surfaces of the BCS. Doped Co2+ generates an electron trap, which can capture the photoinduced electrons, resulting in the efficient separation of the photoinduced electron–hole pairs. Furthermore, the introduction of carbon spheres enhances the optical absorption property and the ability for electron transport. Results of electrochemical characterization and photoluminescence spectra demonstrate that the Co-CdSe/BCS is able to efficiently separate electron–hole pairs and inhibit their recombination. The as-synthesized samples display high efficiency for the photodegradation of methylene blue dye under visible light. This study offers a new strategy to promote photocatalytic performance of the CdSe photocatalyst.
研究领域:
材料科学
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环境科学
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PubMed
高影响因子
Chemosensors
·
2019
·Vol. 7
·期 4
·47
·
IF 0
Shiqi Jiang,Zifan Lu,Tiantian Su,Yanting Feng,Chunxia Zhou,Pengzhi Hong,Shengli Sun,Chengyong Li
Cadmium selenide (CdSe) quantum dots (QDs) were synthesized by water phase synthesis method using 3-mercaptopropionic acid (3-MPA) as a stabilizer, and they were applied to the detection of copper ions (Cu2+). The results showed that CdSe QDs have excellent selectivity and sensitivity toward Cu2+. The fluorescence intensity of CdSe QDs decreased with the increase of Cu2+concentration. The linear range was from 30 nM to 3 μM, and the detection limit was 30 nM. Furthermore, CdSe QDs were used for detecting the concentration of Cu2+in oysters. The content of Cu2+was 40.91 mg/kg, which was close to the one measured via flame atomic absorption spectrometry (FAAS), and the relative error was 1.81%. Therefore, CdSe QDs have a wide application prospect in the rapid detection of copper ions in food.
研究领域:
分析化学
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纳米技术
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环境科学
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食品安全
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DOI
Analytical Methods
·
2012
·Vol. 4
·期 5
·1445-1451
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IF 1.547
Huanshun Yin,Xiaomeng Meng,Zhenning Xu,Lijian Chen,Shiyun Ai
A selective and sensitive electrochemistry method was developed for the determination of phenacetin on CdSe microspheres modified glassy carbon electrode (GCE). The electrode exhibited an effectively catalytic response to the oxidation of phenacetin, which was testified by the increased oxidation peak current and the decreased oxidation peak potential compared with the bare GCE. The scan rate investigation demonstrated that the electrochemical oxidation was an adsorption-controlled process in the range from 20 to 500 mV s−1. Under optimal determination conditions, the oxidation peak current of phenacetin was proportional to its concentration in the range of 0.5 to 800 μM. The limit of detection was estimated to be 0.1 μM (S/N = 3). The developed method showed good reproducibility, acceptable stability and excellent anti-interference performance. The fabricated electrode was successfully used to determine phenacetin in pharmaceutical formulation samples.
研究领域:
电分析化学
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药物代谢
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生物传感器
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药剂学
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分子诊断
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纳米材料应用
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2023
·
IF 12.6
Bo Liu,Yonghao Ge,Yahui Lu,Yibo Huang,Xiaoru Zhang,Xunyi Yuan
This work develops a novel photoelectrochemical sensor for the detection of carcinoembryonic antigen (CEA) based on the composite of UCNPs with semiconductors and conformational changes in the DNA structure . Firstly, SnS 2 , ZnIn 2 S 4 and UCNPs were assembled on the surface of the ITO electrode. Then Au NPs were dropped, which could facilitate the coupling of CdSe NPs modified DNA1 via Au–S bond, giving an ITO/SnS 2 /ZnIn 2 S 4 /UCNPs/CdSe heterojunction structure. When irradiated with 980 nm near-infrared (NIR) light, the UV–visible light emitted by the UCNPs could excite the nanocomposite , producing an enhanced photoelectric reaction. Subsequently, CEA aptamer and DNA2-modified SiO 2 were added to form a Y-shaped DNA structure. At this time, the photocurrent was significantly reduced by the combination of the light-blocking effect of SiO 2 and the departure of CdSe NPs from the electrode surface . When the target CEA was added, the recognition between CEA and the aptamer led to the collapse of the Y-shaped DNA structure, the restoration of hairpin DNA and the proximity of CdSe to the electrode. Accordingly, the photocurrent signals enhanced again. Under optimal experimental conditions, the detection limit as low as 0.3 pg mL −1 was obtained with good selectivity , achieving a sensitive “on-off-on” photoelectrochemical sensor for CEA detection.
研究领域:
分析化学
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生物传感
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分子诊断
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纳米技术
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Qianqian Zhao,Wenkai Zhu,Wenrong Cai,Junyao Li,Datong Wu,Yong Kong
Chiral analysis is of significant importance for living organisms since chirality is the fundamental phenomenon in nature. In this work, a bifunctional electrochemiluminescent (ECL) platform is constructed for chiral discrimination and chiral sensing. 3-Mercaptopropionic acid-functionalized CdSe quantum dots (CdSe QDs) are combined with aminated TiO2 nanotubes (NH2-TiNTs) via amidation. The resultant CdSe QDs/TiNTs display significantly enhanced ECL signals due to the synergistic effect between CdSe QDs and TiNTs, which are then used for the chiral discrimination of the isomers of nine chiral amino acids (AAs) in the presence of d-AA oxidase (DAAO). DAAO can selectively catalyze the oxidation of d-AAs to generate H2O2, which acts as the coreaction reagent and triggers the ECL signals of CdSe QDs/TiNTs, and thus, the isomers of the nine chiral AAs can be effectively discriminated. In addition, the as-constructed ECL platform can also be used for the sensitive detection of d-AAs in the presence of DAAO with a wide linear range and a low limit of detection. These findings suggest that the CdSe QDs/TiNTs can work as a bifunctional ECL platform (chiral discrimination and chiral sensing), which might be an advanced ECL platform for biomedical applications.
研究领域:
分析化学
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材料科学
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生物医学工程
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生物化学
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DOI
PubMed
高影响因子
Nature Electronics
·
2020
·Vol. 3
·期 5
·251-258
·
IF 27.5
Zhou Wenjia,Shang Yuequn,García de Arquer F. Pelayo,Xu Kaimin,Wang Ruili,Luo Shaobo,Xiao Xiongbin,Zhou Xiaoyu,Huang Ruimin,Sargent Edward H.,Ning Zhijun
Upconversion photodetectors convert photons from the infrared to the visible light spectrum and are of use in applications such as infrared detection and imaging. High-performance upconversion devices are, however, typically based on vacuum-deposited materials, which are expensive and require high operating voltages, which limits their implementation in flexible systems. Here we report solution-processed optical upconversion photodetectors with a high photon-to-photon conversion efficiency of 6.5% and a low turn-on voltage of 2.5 V. Our devices consist of a colloidal lead sulfide quantum dot layer for harvesting infrared light that is monolithically coupled to a cadmium selenide/zinc selenide quantum dot layer for visible-light emission. We optimized the charge-extraction layers in these devices by incorporating silver nanoparticles into the electron transport layers to enable carrier tunnelling. Our photodetectors exhibit a low dark current, high detectivity (6.4 × 10 12 Jones) and millisecond response time, and are compatible with flexible substrates. We also show that the devices can be used for in vitro bioimaging.
研究领域:
光子学
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材料科学
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纳米技术
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光电子学
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生物医学工程
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DOI
高影响因子
ACS Photonics
·
2026
·
IF 6.7
Yan Yang,Haiqiang Huang,Lei Liu,Qiuhong Tan,Yifei Huang,Lujun Yang,Hui Zhang,Xuejin Zhang,Feng Song,Yingkai Liu
Two-dimensional (2D) Ruddlesden–Popper perovskite phenylethylammonium lead iodide ((PEA)2PbI4) possesses potential photoelectronic properties and is considered to be an ideal material for photodetectors. However, single devices commonly suffer from low responsivity, slow response speed, and narrow detection range, which hinder their applications in imaging, communications, and artificial intelligence (AI). In this work, high-quality 2D (PEA)2PbI4 tetragons (TTs) were synthesized via a unique liquid–air interface floating method and integrated with cadmium selenide (CdSe) nanobelts (NBs) to construct a novel hybrid heterojunction photodetector. It confirms that the formation of type-II band alignment at the heterointerface enables efficient interfacial charge transfer. Notably, the (PEA)2PbI4/CdSe heterojunction hybrid device exhibits exceptional performance under 450 and 682 nm monochromatic illumination: extremely high responsivity (R) (2.80 × 103 and 6.39 × 103 A/W), excellent detectivity (D*) (4.09 × 1013 and 9.32 × 1013 Jones), large external quantum efficiency (EQE) (7.74 × 105% and 1.16 × 106%), and remarkable Ion/Ioff ratio (3.60 × 105 and 8.66 × 105), as well as fast response speeds (rise/decay time: 108/265 μs and 86/196 μs). Furthermore, the hybrid device overcomes the intrinsic bandgap limitation of (PEA)2PbI4, extending its photoresponse to cover nearly the entire visible spectrum and demonstrating reliable imaging capability. This study provides an innovative strategy for developing high-performance photodetectors with significant practical application potential.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 21
·6538-6544
·
IF 5.236
Yi Huang,Le Gao,HaoHai Yu,Zhihua Yang,Junjie Li,Shilie Pan
Graphical Laser damage limitation : Promising ternary infrared nonlinear optical (NLO) materials, Na 6 MQ 4 (M=Zn, Cd; Q=S, Se), with unique [NaQ 4 ] NLO-active groups, are successfully prepared. Theoretical calculations and statistical analyses indicate that the second-harmonic generation effect and band gap in the compounds originate mainly from the distorted NaQ 4 NLO-active units with a short Na−S bond length. Four sodium-based ternary IR nonlinear optical (NLO) materials, Na 6 MQ 4 (M=Zn, Cd; Q=S, Se), were prepared through a high-temperature flux method. The crystal structure of the compounds is built up of isolated [MQ 4 ] tetrahedra and a 3D framework formed by the NaQ n ( n =4, 5) units. The two selenides, Na 6 MSe 4 (M=Zn, Cd), as promising IR NLO materials, show moderate second-harmonic generation (SHG) responses (0.9 and 0.5×AgGaS 2 ) with good phase-matching behavior, as well as high laser damage thresholds (2 and 1.9×AgGaS 2 ). The two sulfides, Na 6 MS 4 (M=Zn, Cd), exhibit higher laser damage thresholds (13 and 4×AgGaS 2 ), but smaller SHG responses (0.3 and 0.2×AgGaS 2 ). Theoretical calculations and statistical analyses indicate that the SHG effect and band gap in the compounds originate mainly from the distorted NaQ 4 NLO-active units with a short Na−S bond length, which provides a new insight into the design of novel IR NLO materials.
研究领域:
材料科学
·
光学
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Shunyong Wei,Ming Yang,Hui Sun,Faming Li,Fei Xiao,Jihua Zou,Aobo Ren,Yixuan Huang,Zhihui Xiong,Liming Yuan,Hao Xu,Tixian Zeng,Jiang Wu,Zhiming M. Wang
CdSe single crystals (SCs), with a relatively high atomic number, large X-ray absorption coefficients, and high carrier mobility, are expected to provide high-performance detection for X-ray. However, the difficulty of growing high-quality CdSe SC has severely limited its application in X-ray detection. In this work, we develop an unconstrained physical gas phase method and in situ annealing process to grow high-quality CdSe SCs under unconstrained conditions. Using this method, CdSe SCs exhibit natural exposure planes, ultrahigh resistivity of 5.43 × 1012 to 1.29 × 1013 Ω cm and high μτ product of 1.3 × 10–2 to 1.5 × 10–2 cm2 V–1. It is also observed that CdSe SC X-ray detectors exhibit a record sensitivity of 2.08 × 105 μC Gyair–1 cm–2 and a low detection limit of 85 nGyair s–1, which are both desired in medical diagnostics. Moreover, those devices with different crystal directions provide anisotropic X-ray detection performance. Our findings pave a new avenue to exploit high-performance CdSe SC X-ray detectors.
研究领域:
材料科学
·
医学影像
·
半导体物理
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 8
·3350-3356
·
IF 3.069
Yi Huang,Xiaowen Wu,Sadeh Beysen
Two new quaternary chalcogenides, Na6CdSb4S10 and Na3CdSbSe4, were successfully synthesized by the high-temperature solid-state reaction in vacuum-sealed silica tubes. Note that Na6CdSb4S10 crystallizes in the C2/c space group, whereas Na3CdSbSe4 crystallizes in the P21/c space group. As seen from their structures, Na6CdSb4S10 exhibits a three-dimensional (3D) framework structure composed by the interconnection of isolated [(Cd/Sb)2Sb2S10] clusters and two different layers formed by the NaSn (n = 4, 6) units; besides, the structure of Na3CdSbSe4 is composed of isolated ∞(Cd3Sb2Se12)n chains and 2D layers formed by the NaSen (n = 5, 6) units. Their optical performances (bandgap and Raman spectra) were also investigated. Moreover, theoretical calculation was used to analyze the structure–performance relationship of Na3CdSbSe4.
研究领域:
材料科学
·
化学
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DOI
高影响因子
Nanoscale Research Letters
·
2018
·Vol. 13
·期 1
·1-7
·
IF 3.125
Wang Shan,Liu Ruiqing,Li Chenchen
In the presence of Hg 2+ , a fluorescence resonance energy transfer (FRET) system was constructed between CdSe quantum dots (QDs) (donor) and g-C 3 N 4 (receptors). Nanocomposites of g-C 3 N 4 supported by CdSe QDs (CdSe QDs/g-C 3 N 4 nanosheets) were fabricated through an electrostatic interaction route in an aqueous solution. The nanocomposites were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and transmission electron microscopy. Results showed that the g-C 3 N 4 nanosheets were decorated randomly by CdSe QDs, with average diameter of approximately 7 nm. The feasibility of the FRET system as a sensor was demonstrated by Hg (II) detection in water. At pH 7, a linear relationship was observed between the fluorescence intensity and the concentration of Hg (II) (0–32 nmol/L), with a detection limit of 5.3 nmol/L. The new detection method was proven to be sensitive for detecting Hg 2+ in water solutions. Moreover, the method showed high selectivity for Hg 2+ over several metal ions, including Na + , Mg 2+ , Ca 2+ , Pb 2+ , Cr 3+ , Cd 2+ , Zn 2+ , and Cu 2+ . The CdSe QDs/g-C 3 N 4 nanosheet conjugate exhibited desirable long-term stability and reversibility as a novel FRET sensor. The novel FRET-based fluorescence detection provided an attractive assay platform for quantifying Hg 2+ in complex water solutions.
研究领域:
分析化学
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环境科学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
Small Methods
·
2021
·Vol. 6
·期 1
·2100811
·
IF 14.188
Hui Zhang,Youshen Wu,Peng Tang,Hongrui Zhu,Zhenhai Gan,Hu-Qin Zhang,Daocheng Wu
The thermal behavior of enzymes in nanoscale is of great significance to life phenomena. This nonequilibrium state real-time thermal behavior of enzymes at nanoscale cannot be accurately detected by existing methods. Herein, a novel method is developed for the detection of this thermal behavior. The enzyme-quantum dot (QD) conjugates can be obtained by chemically grafting temperature-sensitive amino-AgInS 2 QDs to the enzyme, where the QDs act as nanothermometers with a sensitivity of −2.82% °C −1 . Detecting the photoluminescence intensity changes of the enzyme-QD conjugates, the real-time thermal behavior of enzymes can be obtained. The enzyme-QD conjugates show a temperature difference as high as 6 °C above ambient temperature in nano-microregions with good reproducibility (maximum error of 4%) during catalysis, while solution temperature hardly changed. This method has a temperature resolution of ≈0.5 °C with a detection limit of 0.02 mg mL −1 of enzyme, and spatially ensured that the amino-AgInS 2 QDs are quantitatively bound to the enzyme; thus, it can accurately detect the exothermic behavior of the enzyme and can be extended to other organisms’ detection. This method has high sensitivity, good stability, and reliability, indicating its great potential application in investigating the thermal behavior of organisms in nanoscale and related life phenomena.
研究领域:
生物化学
·
纳米技术
·
生物物理学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）