DALTON TRANSACTIONS
·
2025
·
IF 3.3
Qingmiao Mu,Jia Li,Hongxi Gu,Lijun Ren,Juan Du,Hualei Cheng,Dengwei Hu
Photoswitchable fluorescent materials (PFMs) have attracted considerable attention due to the intrinsic advantages of non-contact operation, cleanliness, and non-invasiveness. Conventional PFMs always require complicated preparation processes with poor fluorescence switching properties, which are affected by the mechanisms of Föster resonance energy transfer (FRET) or photoinduced electron transfer (PET). The WO3-x QDs/Cu NCs composite films are prepared on different substrates by a solution casting method and displays outstanding fluorescence switching properties owing to the super photochromic performance of WO3-x QDs and aggregation-induced fluorescence of Cu NCs. The composite film exhibits reversible on/off switchable fluorescence under UV light irradiation and heat treatment based on the inner filter effect (IFE) mechanism. The composite film shows dynamic variations of the dual-mode signals, and the applications of UV sensing and anti-counterfeiting are analyzed. Sensitive dual-mode detection is realized in UV sensing, especially for UVB. The composite film has a dual-modal imaging capability with good reproducibility and high resolution for security information encryption and anti-counterfeiting. This work provides a novel strategy for fabricating advanced PFMs for multiple optical applications.
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
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2026
·
IF 3.2
Zilong Guo,Zepeng Li,Qi Liu,Chunwei Zhang,Jiaqi Zhang,Hao Kan,Yang Li
In the fields of industrial manufacturing, biomedical diagnostics, and environmental monitoring, computing systems with von Neumann architecture suffer from inefficiencies due to the separation of UV sensing, memory, and processing, leading to increased complexity and hardware overhead. In-sensor computing utilizing UV-responsive optoelectronic neuromorphic devices offers a promising alternative by bypassing these limitations for efficient, low-power UV information processing. Here, we present a UV-responsive optoelectronic synapse based on a GaO x /ZnMgO quantum dots (QDs) heterojunction. This device selectively detects UV light and intrinsically suppresses noise, enabling integrated clear perception and fast computation. Various biological synaptic behaviors are demonstrated on the device under 300 nm UV illumination, including short-term memory (STM) to long-term memory (LTM) transition, learning–forgetting–relearning cycles, and dark adaptation behaviors. Leveraging synaptic features, a UV-driven neuromorphic vision system built from the device achieved 97% recognition accuracy on handwritten digits even in the presence of RGB noise. These results highlight the potential of GaO x /ZnMgO QDs heterojunction synapses for robust, noise-resilient in-sensor computing and high-fidelity UV image processing.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.9
Jixia Tang,Yanan Liu,Chenhao Xu,Leping Li,Jia Guo,Jinlian Bi,Wei Li,Lei Zheng,Yujie Yuan
Blue-light synapses have garnered significant attention owing to their potential application value in neuromorphic systems for myopia prevention, control, and the further mitigation of visual trauma. However, existing devices fail to meet neuromorphic application demands for optoelectronic performance and adaptive visual behaviors because of a complex fabrication process and limited blue-light-dependence eye-inspired function. Here, using an optimized microfluidic technology for perovskite quantum dots (QDs) with mild batch manufacturing process and high reproducibility, we developed a MoS 2 /CsPbBr 3 -based synaptic device integrating photo-sensing, memory, and adaptive visual computing capabilities. This was attributed to high blue-light collection efficiency and self-regulated charge transport in the heterostructure, enhancing photosensitivity ( P ) by 9700 times and detectivity ( D* ) by 22 times compared to the pristine 2D-based device, while successfully emulating key biological synaptic behaviors such as paired-pulse facilitation/depression (PPF/PPD) and long-term potentiation/depression (LTP/LTD). Moreover, the developed hybrid device achieved 92% recognition accuracy, compared to 20% for pristine devices, and possessed image pre-processing capabilities for noise reduction and contrast enhancement due to its differential response to varying blue-light pulse densities. The study present a simple method for fabricating optoelectronic synapses, promoting the integration of 2D semiconductors into artificial neural visual systems.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 102
·83581-83587
·
IF 3.84
Jinzhu Wu,Jun Dai,Yanbin Shao,Yanchun Sun
Novel fluorescent silicon quantum dots (Si-QDs) were synthesized by a one-step hydrothermal procedure using (3-aminopropyl)trimethoxysilane (APTES) as a silicon source and sodium ascorbate (SA) as a reducing agent. This synthetic strategy is straightforward, efficacious and low-cost. The as-synthesized Si-QDs featured narrow size distribution, intense purple-blue fluorescence with a photoluminescence quantum yield (PL QY) of 21%, complete water solubility, and favorable biocompatibility. Moreover, the resultant Si-QDs present robust stability in different circumstances, such as for long-term storage in air, in a wide pH range of 2–12 and under continuous UV irradiation, and they also do not respond to some metal ions. Their superior stability and safety render Si-QDs applicable as fluorescent probes in biomedical applications. The use of Si-QDs as an optical probe is illustrated by fluorescent imaging of IE8 cells.
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Yue Zhang,Gang Li,Qiuyu Guo
A series of composites based on Fe-based MOF (Fe-BDC) and CdSe quantum dots (CdSe QDs) have been synthesized with CdSe QDs well-embedded into Fe-BDC particles, which are characterized by XRD , SEM, TEM, ICP-OES, FT-IR, N 2 physical sorption , UV–visible DRS , PL and electrochemical measurements. By detecting the degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation, the photocatalytic performance of CdSe@Fe-BDC nanocomposites were apparently improved by 5.8 times relative to single Fe-BDC, which can be attributed to the heterostructure formed in CdSe@Fe-BDC. Owing to the perfect interfacial contact, this promotes electron transfer from CdSe to Fe-BDC and significantly facilitates the separation of the photogenerated electron-hole pairs. The photocatalytic mechanism studied by adding sacrificial agents revealed that the predominant active species in the system is hole cation (h + ) and oxygen free radicals (•O 2 − ).
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Rong Wang,Xiangyu Kong,Wentao Zhang,Wenxin Zhu,Lunjie Huang,Jing Wang,Xu Zhang,Xinnan Liu,Na Hu,Yourui Suo,Jianlong Wang
Photocatalytic disinfection, which is a readily reliable method in most climates, holds great promise to significantly reduce the microbial contamination in modern industry. Here we report that vanadate quantum dots-interspersed graphitic carbon nitride (vanadate QDs/g-C 3 N 4 ) can achieve efficient inactivation of Salmonella by harvesting a substantial visible light. Detailed characterization through SEM-EDS, TEM, XRD, FT-IR, and XPS confirmed the formation of the composites. Owing to the efficient reactive oxygen species (ROS) production between vanadate QDs and g-C 3 N 4 , the bactericidal efficiency of AgVO 3 QDs/g-C 3 N 4 could reach 96.4% toward Salmonella in a concentration of 0.75 mg/mL after 10 min visible-light illumination. More importantly, scavenger experiments of different reactive species proved that the photoinduced electron generated at the oxidation site of AgVO 3 /g-C 3 N 4 play a major role as oxidative species. Fluorescent-based cell live/dead test and membrane potentials were applied to demonstrate the integrity of cell membranes. Furthermore, the SEM technology, PCR and BCA protein assay were employed to verify the bacterial decomposition as well as leakage of bacterial cell contents toward Salmonella . Sterilization experiments of Staphylococcus aureus revealed that our composites have broad spectrum antimicrobial activity for both Gram-negative and Gram-positive bacteria under visible light. The results showed that the generation of high ROS could attack the bacterial cells membrane, and ultimately disrupt the cell metabolism through bacterial contents, which provided a feasible method for eliminating the microbial contaminated water.
研究领域:
环境科学
·
材料科学
·
微生物学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 78
·49330-49336
·
IF 3.108
Jian Cui,Tianjiao Liu,Dapeng Liang,Jiale Liu,Kai Zhang,Bai Yang,Yang Ning
Traditional fluorescent probe detection is an established technique for enhancing or quenching luminescence intensity; however, a color changeable fluorescent material is still a challenge in many target detection fields. Herein, a dual-emission quantum dots (QDs)/polymer carbon dots (PCDs) assembled composite nanoparticle was prepared via a simple self-assembly method. By choosing the QDs and PCDs source, the luminescence color of the composite nanoparticles can be controlled all over the visible light spectrum. The composite material possesses high sensitivity and selectivity with Hg2+; with increasing concentration of Hg2+, the luminescence color of the composite material changes from pink to violet, and at last blue. The detection limit of Hg2+ was 10 nM by luminescence spectrum, and 100 nM by visual observation, so it may be utilized for visual detection in environmental science and biology.
研究领域:
环境科学
·
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Shuo Geng,Shu Min Lin,Shi Gang Liu,Wei Zhang,Nian Bing Li,Hong Qun Luo
We synthesized polyethyleneimine capped ZnO quantum dots (PEI-ZnO QDs) which dispersed well in ethanol by using a two-step method. UV–visible absorption spectroscopy, photoluminescence, Fourier transform infrared spectroscopy, high resolution transmission electron microscope, and field emission scanning electron microscope were used to characterize the as-prepared PEI-ZnO QDs. It emitted green-yellow fluorescence (527 nm) for excitation at 355 nm. We used the PEI-ZnO QDs to determine the alcoholic strength because of its different property in water and ethanol which caused decrease in the PEI-ZnO QDs fluorescence intensity with increasing water content. With this method, we determined the alcoholic strength of different artificial samples with a linear range from 20% to 60% vol and detected commercial spirits with satisfactory results.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Jing Zhang,Guangyu Hao,Chenfei Yao,Jiani Yu,Jun Wang,Weitao Yang,Chunhong Hu,Bingbo Zhang
Bimodal imaging has captured increasing interests due to its complementary characteristics of two kinds of imaging modalities. Among the various dual-modal imaging techniques, MR/fluorescence imaging has been widely studied owing to its high 3D resolution and sensitivity. There is, however, still a strong demand to construct biocompatible MR/fluorescence contrast agents with near-infrared (NIR) fluorescent emissions and high relaxivities. In this study, BSA-DTPAGd derived from bovine serum albumin (BSA) as a novel kind of biotemplate is employed for biomineralization of paramagnetic NIR Ag2S quantum dots (denoted as Ag2S@BSA-DTPAGd pQDs). This synthetic strategy is found to be bioinspired, environmentally benign, and straightforward. The obtained Ag2S@BSA-DTPAGd pQDs have fine sizes (ca. 6 nm) and good colloidal stability. They exhibit unabated NIR fluorescent emission (ca. 790 nm) as well as high longitudinal relaxivity (r1 = 12.6 mM–1 s–1) compared to that of commercial Magnevist (r1 = 3.13 mM–1 s–1). In vivo tumor-bearing MR and fluorescence imaging both demonstrate that Ag2S@BSA-DTPAGd pQDs have pronounced tiny tumor targeting capability. In vitro and in vivo toxicity study show Ag2S@BSA-DTPAGd pQDs are biocompatible. Also, biodistribution analysis indicates they can be cleared from body mainly via liver metabolism. This protein-mediated biomineralized Ag2S@BSA-DTPAGd pQDs presents great potential as a novel bimodal imaging contrast agent for tiny tumor diagnosis.
研究领域:
生物医学工程
·
材料科学
·
纳米技术
·
医学成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Ying Liang,Mingqian Wang,Zhicheng Zhang,Guohong Ren,Yajun Liu,Shishan Wu,Jian Shen
We have constructed biocompatible antibacterial nanoplatforms on the basis of a hybrid hydrogel via simple electrostatic interaction embedded with thin layer graphene oxide (GO) sheets modified with zinc oxide quantum dots (ZnO QDs). The materials possess favorable antibacterial efficacy, thereby providing excellent killing effect for Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) compared with materials that have single diagnosis and treatment mode. The excellent performance stems from the combined effects of hyperthermia produced under the near-infrared irradiation of GO sheets, reactive oxygen species, the release of Zn 2+ from ZnO QDs under acidic environment, and the antibacterial activity of hydrogel. The synergy of antibacterial nanoplatforms can be used for wound anti-inflammatory in vivo indicated by the wound healing results. The hybrid hydrogel causes no evident side effects to major organs in mice during wound healing. Therefore, the biocompatible multimodal therapeutic nanoplatforms have great potential for antibacterial activity and wound healing.
研究领域:
生物医学工程
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
IET Nanobiotechnology
·
2019
·Vol. 13
·期 6
·640-649
·
IF 1.925
Wanxia Wang,Youyun Wang,Yu Wang,Huameng Gong,Hongda Zhu,Mingxing Liu
New drug delivery system (ZnO@CMS) of the redox and pH dual-stimuli responsive based on colloidal mesoporous silica nanoparticles (CMS) has been designed, in which zinc oxide quantum dots (ZnO QDs) as a capping agent was conjugated on the surface of nanoparticles by amide bonds. The release behaviour of doxorubicin (DOX) as the model drug from ZnO@CMS (ZnO@CMS-DOX) indicated the redox and pH dual-stimuli responsive properties due to the acidic dissolution of ZnO QDs and cleavage of the disulphide bonds. The haemolysis and bovine serum albumin adsorption assays showed that the modification of ZnO QDs on the mesoporous silica nanoparticles modified by mercapto groups (CMS-SH)(ZnO@CMS) had better biocompatibility compared to CMS-SH. The cell viability and cellular uptake tests revealed that the ZnO@CMS might achieve the antitumour effect on cancer cells due to the cytotoxicity of ZnO QDs. Therefore, ZnO@CMS might be potential nanocarriers of the drug delivery system in cancer therapy. The in vivo evaluation of ZnO@CMS would be carried out in future work.
研究领域:
生物医学工程
·
纳米医学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Yuting Wang,Fengming Zhang,Jia Liu,Bin Yang,Yue Yuan,Yanyan Zhou,Shuyun Bi
A method was established for detecting the content of nitrofurazone (NFZ) by fluorescence quenching of N-Acetyl-L-Cysteine (NAC) coated cadmium telluride quantum dots (CdTe QDs). By means of transmission electron microscopy (TEM) and multispectral methods such as fluorescence and ultraviolet visible spectra (UV–vis), the synthesized CdTe QDs were characterized. The quantum yield ( φ ) of CdTe QDs was measured as 0.33 by reference method. The CdTe QDs had a better stability, the RSD of fluorescence intensity was 1.51% in three months. NFZ quenching the emission light of CdTe QDs was observed. The analyses of Stern-Volmer and time-resolved fluorescence suggested the quenching was static. The binding constants ( K a ) between NFZ and CdTe QDs were 1.14 × 10 4 (293 K), 0.74 × 10 4 (303 K) and 0.51 × 10 4 (313 K) L mol −1 . The hydrogen bond or van der Waals force was the dominated binding force between NFZ and CdTe QDs. The interaction was further characterized by UV–vis absorption as well as Fourier transform infrared spectra (FT-IR). Using fluorescence quenching effect, a quantitative determination of NFZ was carried out. The optimal experimental conditions were studied and determined as following: pH was 7 and contact time was 10 min. The effects of reagent addition sequence, temperature and the foreign substances including some metals (Mg 2+ ; Zn 2+ ; Ca 2+ ; K + ; Cu 2+ ), glucose, bovine serum albumin (BSA) and furazolidone on the determination were studied. There was a high correlation between the concentration of NFZ (0.40 – 39.63 μg mL −1 ) and F 0 / F with the standard curve F 0 / F = 0.0262 c + 0.9910 ( r = 0.9994). The detection limit (LOD) reached 0.04 μg mL −1 (3 S 0 / S ). The contents of NFZ in beef and bacteriostatic liquid were detected. The recovery of NFZ was 95.13% – 103.03% and RSD was 0.66% – 1.37% ( n = 5).
✓ 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）