CRYSTENGCOMM
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2020
·Vol. 22
·期 20
·3474-3481
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IF 3.117
Xiaopeng Zhou,Jiejun Ren,Xuan Dong,Xicheng Wang,Takatoshi Seto,Yuhua Wang
As a representative of III–V semiconductor materials, InP/ZnS quantum dots are regarded as the star material in the field of light-emitting devices due to their low toxicity and suitable luminescence range. However, there are still some major problems in the preparation process of InP/ZnS QDs, such as phosphine precursors are expensive and difficult to preserve, the nucleation time of short wavelength InP/ZnS QDs is too short and the size distribution is too large. In this paper, we'll replace the traditional tris(trimethylsilyl)phosphine with tris(diethylamino)phosphine as a cheaper phosphine precursor and propose a novel and convenient method for adjusting the luminescence wavelength of InP/ZnS QDs. Different from the traditional method to adjust the emission wavelength by changing the nucleation time, the emission wavelength of InP/ZnS QDs was regulated by changing the number of initially formed cores. Zeolites provide a nucleation site for the InP cores. InP/ZnS QDs that emit between 522 nm and 589 nm were obtained. Moreover, the obtained InP/ZnS QDs have good monochromaticity, and the minimum half-width (half-full width) is up to 48 nm. This method provides a new way to adjust the size of quantum dots with good performance.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Xian Wei,Shiliang Mei,Bobo Yang,Zhihao Chen,Hanqing Dai,Zhe Hu,Guilin Zhang,Fengxian Xie,Wanlu Zhang,Ruiqian Guo
Single-phased and dual-emissive nanocrystals with broad emission are attractive fluorescent materials for optoelectronic devices due to their unique properties. Until now, the effect of different metallic cations and inorganic anions on III–V group quantum dots (QDs) concerning luminescence features and crystalline growth has been less explored. In this work, dual-emissive InP/ZnS QDs single-doped with transition-metal compounds (Cu2+, Ag+, or Mn2+) are synthesized to compare their optical and morphological properties. The corresponding doping concentrations to realize dual emission with comparative intensity for Cu, Ag, and Mn are 0.8, 6, and 80%, which vary greatly and might be attributed to different precursor reactivities. As for the morphological and internal structures, transmission electron microscopy (TEM) images indicate that transition-metal ions have no obvious effect on the morphological properties and a higher concentration of chloride anions binding with an In-rich interface could conduce to a homogeneous distribution and triangular growth through the comparison of different metal chlorides as precursors. X-ray photoelectron spectroscopy (XPS) results further demonstrate that the high-resolution In 3d spectrum of Mn-doped InP/ZnS QDs with MnCl2 is mainly dominated by In–P bonds, indicating fewer intermediate chemical states. These results concerning well-defined InP/ZnS QDs could promote more diverse insight into surface chemistry and help to better understand the growth mechanism, thus making it possible to regulate InP/ZnS QDs into desired formats for different practical applications like white light-emitting diodes (LEDs).
研究领域:
材料科学
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纳米技术
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光学
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产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Shuaitao Qin,Maoyuan Huang,Bo Tan,Haiyang Li,Jun Wang,Shiliang Mei,Wanlu Zhang,Pengfei Tian,Ruiqian Guo
Indium phosphide (InP) quantum dots (QDs), as an environmentally benign semiconductor material, exhibit significant potential in optoelectronic devices. The incorporation of metal ions is a widely adopted strategy to modulate the optical properties of InP QDs, thereby expanding their application scope. In this study, rapid thermochromic response was achieved in InP/ZnS QDs through dual cation (Nd 3+ &Mn 2+ ) modification. The introduction of Mn 2+ endowed the QDs with dual emission characteristics, while Nd 3+ stabilized the intrinsic emission at the pure blue wavelength of 470 nm by suppressing QD growth via interface anchoring. Investigations revealed that temperature elevation activated the carrier re-excitation process, leading to enhanced intrinsic emission and enabling dynamic fluorescence color switching from orange-yellow to blue. Leveraging this property, a ratiometric fluorescence thermometer with a detection range of 293–533 K and a response time of <5 s was developed. Furthermore, variable-power excitation experiments elucidated the saturation behavior of Mn 2+ impurity emission, corroborating the competitive mechanism between intrinsic and impurity emissions. This work provides novel insights into the multifunctional fluorescence modulation of cadmium-free QDs, with significant implications for smart sensing and eco-friendly display technologies.
研究领域:
材料科学
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纳米技术
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光电子学
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荧光传感
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热检测
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2025
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IF 4.9
Ziqiang Tian,Maoyuan Huang,Qi Zhong,Xiaomeng Gong,Jia Guo,Ruiqian Guo,Changchun Wang
The design and fabrication of photonic crystals with multiple optical states are significant and urgently desired. However, most conventional photonic crystals with scalable potential display only a single structural color mode, limiting their practical application. Herein, we successfully achieved a new type of dual-mode photonic crystal films through the co-assembly of polymer colloidal core@shell nanoparticles and InP@ZnS quantum dots at room temperature. The co-assembly process was completed with high efficiency by a powerful assembly technique called molecule-mediated shearing-induced assembly technique (MSAT). The obtained dual-mode photonic crystal films possessed two distinct optical states, including a structural color mode and a fluorescent color mode. The advantages of both photonic band gaps and fluorescence emission were synchronously integrated, exhibiting bright structural colors and vibrant fluorescent colors under sunlight irradiation and ultraviolet excitation, respectively. The switch of the two optical states was highly reversible and stable. Besides, we also found that the dual-mode photonic crystal films realized enhanced fluorescent emission from the slow photon effect, and the relationship between the fluorescence enhancement effect and order degrees of dual-mode PC films was studied. Finally, the dual-mode photonic crystal films were employed to design a visual coding-decoding system, and also as raw materials to produce anti-counterfeiting photonic paints. All the experiments provided a novel insight for achieving multiple optical states within a single system, creating opportunities for extending the application of photonic crystals in the realm of information storage, anti-counterfeiting, response materials, and pattern display.
研究领域:
光学材料
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光子学
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纳米技术
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材料科学
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荧光光谱学
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信息安全
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防伪技术
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产品关联
DOI
高影响因子
TALANTA
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2017
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IF 4.162
Yue Hu,Anchen Fu,Zhaoyi Miao,Xiaojing Zhang,Tianlin Wang,An Kang,Jinjun Shan,Dong Zhu,Wei Li
Although ligand fishing has been shown to be an efficient technique for the identification of bioactive components from complex mixtures such as natural products , it cannot be applied to biomedical image processing. Herein, a specific fluorescent ligand fishing combined with in situ imaging approach is presented for the identification of heat shock protein 90 (Hsp 90) inhibitors from complex matrixes, Curcuma longa L. , using N-terminus immobilized Hsp 90α functionalized InP/ZnS quantum dots embedded mesoporous nanoparticles ( i.e. Hsp 90α (NT)-FQDNs) as extraction sorbents and fluorescent tracer. The fished ligands were identified by liquid chromatography time-of-flight/mass spectrometry (LC-TOF/MS) and gas chromatography-mass spectrometry (GC-MS). Moreover, in situ imaging by confocal laser scanning microscopy (CLSM) was applied for evaluating the effect of fished-ligands on bioactivity-induced apoptosis morphologically in HeLa cells. MTT assay verified the bioactivity of the ligands and molecular docking results further provided convincing information to verify the feasible binding mode between ligands and protein. Twelve ligands as potential Hsp 90 inhibitors were ultimately fished and identified from Curcuma longa L. crude extracts. The proposed approach based on Hsp 90α functionalized nanocomposites is superior in the combination of highly specific screening efficiency and concurrent visual in situ imaging, which could have great promise for the development of other plant-derived Hsp 90 inhibitors, and providing a rapid and reliable platform for discovering biologically active molecules in natural products.
研究领域:
药理学
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生物化学
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分子生物学
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纳米技术
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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）