JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Lvlv Gao,Enshen Zhang,Yu Sun,Jiarui Huang,Sang Woo Joo
Nitrogen-doped, carbon-coated (Zn 0.71 Mn 0.29 )Se/MnSe porous nanospheres (Zn–Mn–Se@NC) were designed via a co-precipitation method and a vapor-phase selenization strategy, which maintained a capacity of 290 mAh/g for 5 A/g after 1000 cycles and 190 mAh/g at 10 A/g. The satisfied cycling performance was due to the porous nanosphere that relieve volume effect of electrode. Furthermore, the heterogeneous interface formed by (Zn 0.71 Mn 0.29 )Se and MnSe enhances thermodynamic stability and electrochemical reaction kinetics considerably, improving the electron/Na + transfer rate. Furthermore, Zn–Mn–Se@NC, a bimetallic selenide, exhibits superior conductivity that improves the rate capacity of the Zn–Mn–Se@NC electrode. As an anode, the long-cycle and high-rate sodium-ion batteries using the Zn–Mn–Se@NC porous nanospheres have potential applications in electronic devices.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Yongling Ding,Shirley Z. Shen,Huadong Sun,Kangning Sun,Futian Liu
l -Glutathione capped (GSH) ZnSe quantum dots (QDs) have been synthesized as a fluorescence ions probes for ultrasensitive Cu (II) detection. These QDs surface decoration with glutathione shells can be directly applied without previous treatment. The fluorescence quenching of the GSH-capped-ZnSe QDs depends on the concentration, pH values and reaction time of the Cu 2+ solution. Based on the effective electron transfer from GSH to Cu 2+ and the surface ligand stripping occurs onto the surface of ZnSe QDs, it results in the reduction of Cu 2+ to Cu + and increment of surface defection on the surface of the QDs. Under the optimum conditions, the detection limit of Cu 2+ is 2 × 10 −10 mol L −1 . Meanwhile, the effect of foreign ions displays a low interference response in the detecting of Cu 2+ ions. Moreover, based on the invariable absorption peak position and curtate luminescence lifetime of ZnSe QDs, the quenching process has also been confirmed to be a dynamic quenching procedure. With regard to the practical feasibility test of the fluorescent probe , a relative lower standard deviation (RSD) (≤3%) and a high recovery rate demonstrate that the proposed simple method is sensitive, accurate and reliable.
研究领域:
分析化学
·
纳米生物技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 27
·12064-12070
·
IF 3.591
Ming Zhong,Lingling Li,Kun Zhao,Hui Peng,Shixian Xu,Bitao Su,Dahui Wang
Searching for novel alternatives to the traditional graphite anode in high performance lithium-ion batteries is of great significance, which, however, faces many challenges. In this work, pyrolysis coupled with a selenization strategy was adopted to synthesize a one-dimensional core–shell nanorod composite (MoO2/ZnSe@N-C) by using zeolitic-imidazole framework coated molybdenum trioxide as a precursor. The as-obtained material comprises a zinc selenide loaded molybdenum dioxide core and a nitrogen-doped carbon shell, which can enhance the specific capacity through conversion reactions and buffer the volume change as well as promote the electrical conductivity, respectively. When used as an anode in lithium-ion batteries, the optimized MoO2/ZnSe@N-C sample delivers a high specific capacity (807 mA h g−1 at 100 mA g−1 for 100 cycles) with a coulombic efficiency up to 99%, a good rate capability, and long-term cycling stability for 900 cycles at 500 mA g−1 which is better than that of MoO3 and ZIF-8 derived materials. In addition, the lithium storage mechanism was analyzed by cyclic voltammetry at various scanning rates and the result indicates that the capacitive-controlled behavior dominates the Li+ ion transport kinetics process.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
LUMINESCENCE
·
2016
·Vol. 32
·期 2
·231-239
·
IF 1.452
Lu Lai,Si-Yu Sheng,Ping Mei,Yi Liu,Qing-Lian Guo
High-quality Cd x Zn 1 – x Se and Cd x Zn 1 – x Se/ZnS core/shell quantum dots (QDs) emitting in the violet–green spectral range have been successfully prepared using hydrothermal methods. The obtained aqueous Cd x Zn 1 – x Se and Cd x Zn 1 – x Se/ZnS QDs exhibit a tunable photoluminescence (PL) emission (from 433.5 nm to 501.2 nm) and a favorable narrow photoluminescence bandwidth [full width at half maximum (FWHM): 30–42 nm]. After coating with a ZnS shell, the quantum yield increases from 40.2% to 48.1%. These Cd x Zn 1 – x Se and Cd x Zn 1 – x Se/ZnS QDs were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier transform infrared (FTIR) spectroscopy. To further understand the alloying mechanism, the growth kinetics of Cd x Zn 1 – x Se were investigated through measuring the fluorescence spectra and X-ray diffraction spectra at different growth intervals. The results demonstrate that the inverted ZnSe/CdSe core/shell structure is formed initially after the injection of Cd 2 + . With further heating, the core/shell structured ZnSe/CdSe is transformed into alloyed Cd x Zn 1 – x Se QDs with the diffusion of Cd 2 + into ZnSe matrices. With increasing the reaction temperature from 100 °C to 180 °C, the duration time of the alloying process decreases from 210 min to 20 min. In addition, the cytotoxicity of Cd x Zn 1 – x Se and Cd x Zn 1 – x Se/ZnS QDs were investigated. The results indicate that the as-prepared Cd x Zn 1 – x Se/ZnS QDs have low cytotoxicity, which makes them a promising probe for cell imaging. Finally, the as-prepared Cd x Zn 1 – x Se/ZnS QDs were utilized to ultrasensitively and selectively detect Hg 2 + ions with a low detection limit (1.8 nM).
研究领域:
材料科学
·
分析化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 43
·22873-22880
·
IF 5.968
Xiwei Zhang,Xiujuan Zhang,Xiaozhen Zhang,Yuping Zhang,Liang Bian,Yiming Wu,Chao Xie,Yuanyuan Han,Yan Wang,Peng Gao,Liu Wang,Jiansheng Jie
The narrow indirect bandgap of Si hinders the full absorption and utilization of the solar light. Energy band engineering to the Si based photovoltaic devices is essential to address this problem. Here we report the fabrication of ZnSe nanoribbon (ZnSeNR)/Si nanowire (SiNW) p–n heterojunction arrays by directly growing or simply drop-casting the p-type ZnSeNRs on highly aligned n-type SiNW arrays. Phosphorus (P) was used as dopant to achieve robust p-type doping in the ZnSe nanostructures with a hole concentration as high as 6.5 × 1018 cm−3. Thanks to the matched bandgap and the light trapping arising from the one-dimensional (1D) array structure, the heterojunction arrays exhibited improved light absorption, particularly in the blue/UV wavelength range. Moreover, by taking advantage of the ohmic contact between graphene and p-ZnSeNR, heterojunction array solar cells with graphene transparent electrode were fabricated, giving rise to a power conversion efficiency of ∼0.78% under AM 1.5G illumination. It was found that the surface passivation to the SiNW array played an important role in determining the device performance; an efficiency up to 2.27% was obtained after surface modification with methyl groups. Our results demonstrate the heterojunction arrays, together with the graphene transparent electrodes, could be promising candidates for high-performance and low-cost photovoltaic applications.
研究领域:
材料科学
·
纳米科技
·
半导体物理
·
光电子学
·
能源材料
·
表面科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
·
2020
·
IF 3.086
Yupin Cao,Jinsu Feng,Lifu Tang,Guichun Mo,Weiming Mo,Biyang Deng
A new method for simultaneously determining cytokeratin fragment antigen 21–1 (CYFRA21-1), carcinoembryonic antigen (CEA), and carbohydrate antigen (CA15–3) was developed using single-particle, ICP-MS-based, magnetic immunoassay . Gold nanoparticles (AuNPs), ZnSe quantum dots (QDs), and Silver nanoparticles (AgNPs) were employed to tag antibodies. A highly efficient capture of CYFRA21-1, CEA, and CA15–3 was achieved using biotinylated, antibody-coated magnetic beads. AuNPs/ZnSe QDs/AgNPs-tagged second antibodies helped realize sensitive quantification of the target antigen using single particle ICP-MS. Under optimum conditions, CYFRA21-1, CEA, and CA15–3 linear concentration ranges were 0.05–50 ng mL −1 , 0.02–100 ng mL −1 , and 0.6–250 mU mL −1 . The correlation coefficients were 0.9999, 0.9987, and 0.9970, respectively. CYFRA21-1, CEA, and CA15–3 detection limits were 0.02 ng mL −1 , 0.006 ng mL −1 , and 0.25 mU mL −1 , respectively. Relative standard deviations (RSD) for CYFRA21-1, CEA, and CA15–3 were 3.2%, 4.4%, and 4.2%, respectively. The method simultaneously detected CYFRA21-1, CEA, and CA15–3 in human lung cancer serum samples with recoveries of between 89.8% and 101%.
研究领域:
医学诊断
·
癌症研究
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
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
·
材料科学
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纳米技术
·
光电子学
·
生物医学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yang Peng,Haikuan Yang,Ting Zhang,Songsong Zhou,Haiwei Jiang,Yongjie Zheng,Weiran Yang
Synthesis of γ -butyrolactone (GBL) from renewable biomass resources under mild reaction condition with catalysis is attractive but challenging. Herein, we report the photocatalytic oxidation of the biomass-based furfural derivative tetrahydrofurfuryl alcohol (THFAL) to prepare GBL under light irradiation (365 nm) in air at room temperature. Utilising Ru/TiO 2 as the photocatalyst and air as the oxidant, a GBL yield as high as 73 % was achieved. The reaction mechanism was studied rigorously by performing photocatalyst performance evaluation, material characterisation, free-radical quenching reactions and electron spin resonance (ESR). In situ diffuse reflectance infrared Fourier transform spectroscopy was employed to detect intermediate products and elucidate the mechanism at the molecular level. Based on the in-situ monitoring results, we propose a pathway for the oxidation decarbonylation of THFAL to produce CO 2 and GBL.
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Peihua Li,Yibo Zhao,Rufeng Tian,Wanggang Zhang,Hongxia Wang,Jian Wang,Yiming Liu
Rational design and application of high performance anodes are crucial for advancing sodium-ion batteries (SIBs). In this work, the 3D Mo-ZIF-L is subjected to a directional cross-linking process, followed by g-C 3 N 4 incorporation to modify the self-assembled precursor, ultimately yielding a high-conductivity carbon material. Subsequently, bimetallic selenide (ZnSe/MoSe 2 ) is successfully loaded onto the carbon surface via chemical vapor deposition. This strategy simultaneously created van der Waals (vdW) heterostructures and abundant vacancies while alleviating volume expansion during cycling, endowing the ZnSe/MoSe 2 -C@g-C 3 N 4 (ZMSCN) with stable sodium storage ability (358.4 mAh g −1 after 3000 cycles at 5 A g −1 ). The remarkable performance originates from enhanced charge transfer at p-type/n-type heterointerfaces, which provides high capacitive contribution and rational Na + adsorption energy. Furthermore, ZMSCN features dynamic heterostructures and vacancies evolution, with in-situ characterizations confirming charge transfer-controlled reaction kinetics and carbon matrix-dominated Na + gradient diffusion, along with stable solid electrolyte interface (SEI) film ionic transport kinetics. Therefore, ZMSCN//NVP delivers an outstanding reversible capacity of 375.6 mAh g −1 at 0.5 A g −1 while maintaining 118.6 mAh g −1 after 700 cycles at 5 A g −1 . This work provides fundamental insights into heterostructures engineering and vacancies modulation, demonstrating a viable pathway for developing practical anodes for SIBs.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2024
·Vol. 78
·期 14
·7943-7950
·
IF 2.1
Li Zhigang,Liu Xuzhuo,Wang Chunlong,Song Hanbing,Zhang Jie
In this study, we synthesized zinc selenide (ZnSe)-polyacrylamide (PAM) nanomaterials for their potential application in treating knee osteoarthritis (KOA). Initially, we characterized the newly prepared material through various techniques including Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption–desorption to confirm its identity as the desired product. The results demonstrated that ZnSe-PAM nanomaterial exhibited excellent water solubility, biocompatibility, and stability, along with a large surface area, making it suitable for use as a drug carrier. Subsequently, the material was loaded with the drug 1 to obtain ZnSe-PAM@1. Cellular and thermosensitive experiments were then conducted, revealing that this nanomaterial could facilitate drug release by generating heat, thereby reducing the level of microRNA-146a-5P and blocking the phosphoinositide 3-kinase/protein kinase B/mammalian target of rapamycin/extracellular (PI3K/Akt/mTOR/ERK) signal-regulated kinase signaling pathway, thus alleviating the symptoms of KOA. These findings present a new direction for drug intervention in KOA and highlight the potential of developing ZnSe-PAM nanomaterials as novel drug carriers.
研究领域:
材料科学
·
医学
·
生物技术
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产品关联
DOI
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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产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2020
·
IF 14.588
Yuan Liu,Gongxun Bai,Yongxin Lyu,Youjie Hua,Renguang Ye,Junjie Zhang,Liang Chen,Shiqing Xu,Jianhua Hao
Realizing multicolored luminescence in two-dimensional (2D) nanomaterials would afford potential for a range of next-generation nanoscale optoelectronic devices. Moreover, combining fine structured spectral line emission and detection may further enrich the studies and applications of functional nanomaterials. Herein, a lanthanide doping strategy has been utilized for the synthesis of 2D ZnSe:Er3+ nanosheets to achieve fine-structured, multicolor luminescence spectra. Simultaneous upconversion and downconversion emission is realized, which can cover an ultrabroadband optical range, from ultraviolet through visible to the near-infrared region. By investigating the low-temperature fine structure of emission spectra at 4 K, we have observed an abundance of sublevel electronic energy transitions, elucidating the electronic structure of Er3+ ions in the 2D ZnSe nanosheet. As the temperature is varied, these nanosheets exhibit tunable multicolored luminescence under 980 and 365 nm excitation. Utilizing the distinct sublevel transitions of Er3+ ions, the developed 2D ZnSe:Er3+ optical temperature sensor shows high absolute (15.23% K–1) and relative sensitivity (8.61% K–1), which is superior to conventional Er3+-activated upconversion luminescent nanothermometers. These findings imply that Er3+-doped ZnSe nanomaterials with direct and wide band gap have the potential for applications in future low-dimensional photonic and sensing devices at the 2D limit.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）