JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Dongchen Che,Di Ding,Hongzhi Wang,Qinghong Zhang,Yaogang Li
Efficient aqueous synthetic methods for near-infrared quantum dots as bioimaging agents are urgently required. In this work, a simple and fast synthesis of highly luminescent, near-infrared Ag 2 Se quantum dots (QDs) in aqueous media is reported. The method avoids high temperature, pressure and organic solvents to directly generate water-dispersible Ag 2 Se QDs. The photoluminescence emission of Ag 2 Se QDs ranges from 835 to 940 nm by different Ag:Se molar ratio. Using the ZnSe as a shell, the quantum yield reaches up to 42%. The Ag 2 Se ZnSe QDs with high quantum yield, near-infrared and low cytotoxic could be used as good cell labels, showing great potential applications in bio-imaging.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2010
·Vol. 21
·期 1
·151-156
·
IF 4.795
Pengtao Shao,Qinghong Zhang,Yaogang Li,Hongzhi Wang
The aqueous synthesis of color-tunable and stable Mn2+-doped ZnSe quantum dots (Mn:ZnSe d-dots) via a nucleation-doping strategy was realized in a three-necked flask and the photoluminescence (PL) peak position was easily tuned from 572 nm to 602 nm by prolonging the epitaxial-growthg time. The chemical stability of the resulting d-dots is much better than that of CdTevia an aqueous synthesis. Separation of nucleation and growth of crystallization, and multiple-step-injection of both zinc precursor and 3-mercaptopropionic acid (MPA) stabilizing reagent, were employed to realize a balanced, mutually diffused interface and a pure ZnSe shell. The resulting nanocrystals show excellent optical properties, implying that nanocrystals with high quality could also be achieved via aqueous synthesis.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 10
·13409-13417
·
IF 2.478
Yu Wenjuan,Fu Xiang,dong Kexiu
Semitransparent polymer solar cells (STPSCs) are a potential photostatic structure for building-integrated photovoltaic (BIPV) application. In order to realize the application practically, the balance between efficiency, transparency, and color property is a challenge in the field. In this paper, efficient semitransparent polymer solar cells utilizing P3HT:ICBA as active layers were demonstrated. By introducing ZnSe/LiF distributed Bragg Reflector (DBR) onto the device, the power conversion efficiency (PCE) has been increased to 6.19%. In addition, this approach can also improve the color render property by leveling the transmittance spectrum. The highest color-rendering index (CRI) is achieved using device with 1 pair of DBR. As a result, the high efficiency and fine CRI confirmed that the STPSC with DBR is an effective structure for BIPV application.
研究领域:
材料科学
·
光电子学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Zexiao Zheng,Xukai Li,Laisheng Li,Yiming Tang
Quaternary semiconductor film consists of ZnO, ZnSe, CdSe and MoS 2 was designed to establish a core-shell structure to achieve the photoelectrochemical oxidation of amoxicillin . The hybrid photoelectrode was fabricated on a FTO substrate from bath deposition methods . The hierarchical ZnSe/CdSe/MoS 2 shell was covered uniformly on ZnO nanorod core which provided a direct pathway for electron transfer , large surface area to enhance light absorption and increase active sites. The quaternary photoelectrode exhibited a photocurrent density of 26.86 mA/cm 2 at 0 V vs. Ag/AgCl under UV–visible light illumination, which was 31.9 times, 16.7 times and 1.6 times of that of the bare ZnO nanorods, binary ZnO/ZnSe and ternary ZnO/ZnSe/CdSe photoelectrodes, respectively. 10 ppm of amoxicillin was completely degraded in 30 min by the quaternary working electrode with an applied bias of 0.5 V vs. Ag/AgCl. The reusability and stability of quaternary electrode was demonstrated by 3-run recycling experiments. The enhanced photoelectrochemical performance of quaternary photoelectrode can be attributed to the enhancement of light absorption and increased active sites from the coverage of visible-active layers, the accelerated charge separation from the formation of p-n junction and reduced photocorrosion of CdSe from the protection of MoS 2 on the surface.
研究领域:
环境科学
·
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 49
·38810-38817
·
IF 3.84
Yeping Li,Jingbo Xu,Yun Xu,Liying Huang,Junli Wang,Xiaonong Cheng
The objective of the study is to describe a new approach of combining quantum dots into chitosan as an anti-cancer drug carrier. Novel chitosan–ZnSe/ZnS (CS–ZnSe/ZnS) nanoparticles were synthesized by a one-step ionic gelation technique, with ZnSe/ZnS quantum dots (ZnSe/ZnS QDs) as cross-linking agent and for fluorescent labeling. The approach not only avoids the use of emulsifiers and chemical cross-linking agents but also prevents the possibility of damage to drugs. The fluorescent CS–ZnSe/ZnS nanoparticles were about 100–500 nm in size and stable in a physiological environment. Low cytotoxicity was ensured by investigation with mouse lung carcinoma cells. The cell viability remained 99% when the concentration of CS–ZnSe/ZnS nanoparticles increased to 200 μg mL−1. In the in vitro drug release experiment, 5-fluorouracil (5-Fu) loaded within CS–ZnSe/ZnS nanoparticles had more preferable sustained-release performance and longer equilibrium time compared with that of the pure 5-Fu. The fluorescent CS–ZnSe/ZnS nanoparticles are expected to be used for biological fluorescent labeling and drug carriers.
研究领域:
生物材料学
·
纳米医学
·
药剂学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 1
·91-101
·
IF 1.638
Yan Yi,Yang Shuai,Jiang Feng,Luo Yuwei,Gao Hejun,Liao Yunwen
The sheet-like adsorbent of the eggshell wastes was prepared by the thermal hydrolysis method. The structure of the adsorbent was characterized by scanning electron microscope, Brunauer-Emmett-Teller, X-ray diffraction, transmission electron microscope, and X-ray photoelectron spectrometer. The adsorption capacity was investigated in a Pb 2+ solution. The effects of initial pH, salt concentration, contact time, and adsorbate concentration on the adsorption of lead ions were investigated in detail. The morphology of the adsorbent was sheet-like microspheres. Zinc selenide/zinc oxide could be uniformly loaded onto the eggshell waste surface, which could effectively enhance the specific surface area of the eggshell wastes. The adsorption kinetics and isotherm followed the pseudo-second-order and Langmuir–Freundlich isotherm model, respectively. The synthesized adsorbent showed a maximum lead adsorption capacity of 1,428.78 mg/g at room temperature. Ion-exchange was the main adsorption mechanism.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 11
·11463-11469
·
IF 1.798
Zhang Xiwei,Meng Dan,Tang Zhenjie,Hu Dan,Ma Dongwei
Phosphorus-doped ZnSe nanowires were synthesized by using phosphorus (P) as dopant via thermal evaporation method. Their doping effect and obvious p-type conduction were confirmed through a top-gate MISFET based on individual P-doped ZnSeNW. Negative photoconductivity (the photocurrent was lower than the dark current) was found in p-type ZnSeNWs due to their surface effect. Two terminal devices based on p-type ZnSeNWs, as gas sensors, were also constructed and performed effective detecting behaviors to oxidizing gas. Furthermore, a complementary photodetector containing both n-type ZnSeNWs and p-type ZnSeNWs was first manufactured to eliminate the effects of crosstalk or false signal exist in conventional photodetectors. These results are expected to be used to develop new-type nano-devices and expand their applications.
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 20
·4056-4063
·
IF 1.915
Shifeng Li,Li Zhang,Lei Chen,Yiman Zhong,Yonghong Ni
ZnSe quantum dots (QDs) with a homogeneous size distribution and good stability were synthesized by the reaction of zinc acetate and NaHSe in the presence of glutathione (GSH). The obtained ZnSe QDs were characterized using transmission electron microscopy (TEM) and X-ray powder diffraction (XRD). Simultaneously, UV-visible spectroscopy (UV-vis) was performed and the fluorescence properties of ZnSe QDs were investigated. The effect of ZnSe QDs on the luminol–potassium periodate (KIO4) chemiluminescence (CL) system, a popular model CL system, was researched. It was found that as-prepared ZnSe QDs could strongly enhance the chemiluminescence (CL) of the luminol–KIO4 system. To discuss the mechanism of the CL enhancement, we studied the UV-vis and CL spectra of the luminol–KIO4–ZnSe QDs system. The CL enhancement should be attributed to the oxidation of luminol to its excited state by KIO4, under the catalysis of ZnSe QDs, which caused strong light emission. It was found that rutin, p-t-butylprocatechol, catechol, paracetamol, resorcinol and tryptophan could markedly inhibit the CL of the luminol–KIO4–ZnSe QDs system among 17 kinds of amino acids and 23 other kinds of organics. The above phenomena presented good linear relations. Thus, effective methods to detect them were developed.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2024
·Vol. 32
·期 22
·37984-37993
·
IF 3.2
Linfeng Wang,Xiaoyue Huang,Tingting Zhang,Jinke Bai,Ting Zhao,Bing Xu,Qinghua Li,Xiao Jin,Xiao Jin,Yuxiao Wang,Xueru Zhang,Yinglin Song,Yinglin Song
InP quantum dots (QDs) have emerged as promising nanomaterials in various fields due to their exceptional optical properties. However, its wide emission linewidth limits further application. In this study, we synthesized high-quality InP/ZnSe/ZnS QDs by suppressing hole defects. The unreacted In precursors during nucleation easily enter ZnSe in the subsequent shelling process, forming a hole trapping center that adversely affects the photo-excitons radiative recombination. Our results demonstrate that the presence of In ions in ZnSe shell enhances exciton-phonon coupling, broadens the fluorescence emission spectrum, and weakens exciton binding energy. The optimized InP QDs exhibit a line width of 44 nm and 90% PLQY at 630 nm. Furthermore, our investigation into the interaction between shell hole defects and core exciton function provides valuable insights for designing and preparing another high-performance core-shell heterojunction QDs.
研究领域:
纳米技术
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 44
·17972-17977
·
IF 5.101
Pengtao Shao,Hongzhi Wang,Qinghong Zhang,Yaogang Li
Mn-doped ZnSe nanocrystals (Mn:ZnSe d-dots) that emit white light were synthesized in aqueous media in microfluidic reactors. White light emission from Mn:ZnSe d-dots was a result of combined emission of blue light (emission from non-coordinated surface selenium sites) and yellow light (4T1 → 6A1 emission from Mn2+ ions). Emission from non-coordinated surface selenium sites was realized by adjusting the ratio of the flow volumes of [Zn]/[Mn] and the mass of stabilizer added. Photoluminescence from the Mn:ZnSe d-dots was easily tuned from 580 to 602 nm by regulating flow volume. Under the optimal experimental conditions, Mn:ZnSe d-dots that emit white light with a quantum yield of about 10.2% were fabricated.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2015
·
IF 1.644
Wenyan Liu,Yu Zhang,Cheng Ruan,Dan Wang,Tieqiang Zhang,Yi Feng,Wenzhu Gao,Jingzhi Yin,Yiding Wang,Alexis P. Riley,Michael Z. Hu,William W. Yu
The quantum dot-based light-emitting diodes (QD-LEDs) were fabricated using blue GaN chips and red-, yellow-, and green-emitting ZnCuInS/ZnSe/ZnS QDs. The power efficiencies were measured as 14.0 lm/W for red, 47.1 lm/W for yellow, and 62.4 lm/W for green LEDs at 2.6 V. The temperature effect of ZnCuInS/ZnSe/ZnS QDs on these LEDs was investigated using CIE chromaticity coordinates, spectral wavelength, full width at half maximum (FWHM), and power efficiency (PE). The thermal quenching induced by the increased surface temperature of the device was confirmed to be one of the important factors to decrease power efficiencies while the CIE chromaticity coordinates changed little due to the low emission temperature coefficients of 0.022, 0.050, and 0.068 nm/°C for red-, yellow-, and green-emitting ZnCuInS/ZnSe/ZnS QDs. These indicate that ZnCuInS/ZnSe/ZnS QDs are more suitable for downconversion LEDs compared to CdSe QDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Jinlin Wang,Can Wu,Wang Zhang,Yang Zhao,Kai Ding,Jie Xiao,Xiaoyuan Zeng,Yingjie Zhang
Although room temperature sodium-sulfur (RT/Na-S) battery has been acclaimed as one of the most promising among the next generation of energy storage technologies, their commercial practicability is still challenged because of the shuttle effect of sodium polysulfides (NaPSs) as well as the slow sulfur (S) cathode redox kinetics. Here, metal selenides (ZnSe) nanoparticles loaded on nitrogen-doped carbon (ZnSe/NC) are elaborately designed and synthesized to serve as the S host for RT/Na-S battery. The ZnSe/NC can accommodate a high S loading and facilitate ion transport. Meanwhile, ZnSe nanoparticles can promote the conversion of long-chain NaPSs into short-chain NaPSs. During this process, they can exert a strong adsorption effect on NaPSs through chemical bonds (Zn S). The superiority of the S@ZnSe/NC electrode is harnessed in the assembly of RT/Na-S battery, presenting remarkable capacity performance and stable cycling (retains 720 mAh g −1 after 100 cycles at 0.1 A g −1 and 400.8 mAh g −1 after 1300 cycles at 1.0 A g −1 .). This work offers a feasible approach to prepare metal selenide catalysts for high-performance RT/Na-S battery.
研究领域:
材料科学
·
能源存储技术
✓ 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）