CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Wei Wan,Xinxin Han,Yayun Zhou,Fangrui Chen,Xiping Jing,Shi Ye
Developing a secure and unclonable anti-counterfeiting technology with more dimensional encryptions is urgently demanded. All-inorganic halide perovskites hold great potential for applications in advanced fluorescence anti-counterfeiting owing to their superior optical properties, such as tunable emission colors, narrow emission peaks, etc. By further utilizing the feasibility of anion exchange for perovskite halides, this research successfully designs five-dimensional (5D) anti-counterfeiting barcodes with core–shell-like structured perovskite-like oxide and perovskite halide composites. The composites are prepared by a facile synthesis method, which includes adhesive growth of Cs(Pb x Mn 1-x )(Cl y Br 1-y ) 3 on the surface of CsCa 2 Ta 3 O 10 : Yb, Er (abbreviated as CCTO: Yb, Er@CsMX 3 ) via sharing Cs + at the interface. The unique structure makes it possess sensitivity to some additive decrypted inks, offering one more intriguing anti-counterfeiting dimension beyond the common dual-mode fluorescence and time-gating technique. The CCTO: Yb, Er@CsMX 3 composites exhibit typical green upconversion (UC) luminescence under a 980 nm laser, red or green or blue (RGB) emission under ultraviolet (UV) light irradiation, ns-ms emission decay time, and changeable emission color when treated with decrypted inks. The fluorescent inks and barcodes are simple for fabrication, efficient for coding, easy for viewing and difficult for cloning, making them promising for anti-counterfeiting applications.
研究领域:
材料科学
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光学
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纳米技术
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防伪技术
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
·
IF 3.261
Huanxian Shi,Qiqi Nie,Min Yang,Cunjin Wang,Enzhou Liu,Zhen Ji,Jun Fan
In this paper, a novel ratiometric fluorescence probe for melamine detection based on luminescence resonance energy transfer (LRET) between the NaYF 4 :Yb, Er upconversion nanoparticles (UCNPs) and gold nanoparticles (AuNPs) was developed. The detection mechanism could be interpreted to the AuNPs quenched the fluorescence intensity (F 542 and F 654 ) of the UCNPs under 980 nm excitation. after melamine addition, the fluorescence intensity of the UCNPs was recovered due to the aggregation of Au NPs. A good linear relationship between the ratio of F 542 to F 654 nm (F 542 /F 654 ) was obtained in ranges of 20-200 μg/L of the melamine concentration and the limit of detection was 8.8 nM. Besides, The probe exhibited an excellent selectivity and good sensitivity to melamine, and achieved the melamine detection in real sample. This work paved a new avenue for the potential practice application for commercial instantaneous determination of the melamine.
研究领域:
分析化学
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食品安全
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Lele Qiu,Yulin Yang,Guohua Dong,Debin Xia,Mengru Li,Xiao Fan,Ruiqing Fan
As for the solution-processed MAPbI 3 film, the pinholes and gaps are an inevitable and undesirable phenomenon, which can usually lead to serious interface charge recombination due to the penetration of hole transport materials in perovskite solar cells (PSCs). Herein, a hydrophobic β-NaYF 4 :Yb,Er up-conversion ultrathin layer with particle size ca. 6 nm was first applied to modify the MAPbI 3 film for optimizing the surface of perovskite film. Thereby, the corresponding PSCs yield a significantly enhanced power conversion efficiency of 15.17% compared with that (13.32%) of the pristine PSCs. Furthermore, the PSCs also have a good stability in air atmosphere (relative humidity ≤45%) because of the introduction of this hydrophobic material. After a series of detailed investigations and comparison, it can be easily concluded that the filled pinholes and gaps in perovskite films via β-NaYF 4 :Yb,Er nanoparticles is the main reason for the performance enhancement of the β-NaYF 4 :Yb,Er based PSCs, which can result in an enhanced hole extraction efficiency and reduced interface charge recombination. As a conclusion, it is a feasible and effective approach for improving the photovoltaic performance of PSCs by filling up the pinholes and gaps in perovskite films with up-conversion ultrathin layers.
研究领域:
材料科学
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能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2015
·Vol. 8
·期 2
·878-888
·
IF 7.394
Yuanwei Pan,Ling'e Zhang,Leyong Zeng,Wenzhi Ren,Xueshan Xiao,Jichao Zhang,Lili Zhang,Aiguo Li,Guangming Lu,Aiguo Wu
Multidrug resistance (MDR) of cancers is still a major challenge, and it is very important to develop visualized nanoprobes for the diagnosis and treatment of drug resistant cancers. In this work, we developed a multifunctional delivery system based on DOX-encapsulated NaYF4:Yb/Er@NaGdF4 yolk–shell nanostructures for simultaneous dual-modal imaging and enhanced chemotherapy in drug resistant breast cancer. Using the large pore volume of the nanostructure, the delivery system had a high loading efficiency and excellent stability. Also, an in vitro and in vivo toxicity study showed the good biocompatibility of the as-prepared yolk–shell nanomaterials. Moreover, by nanocarrier delivery, the uptake of DOX could be greatly increased in drug resistant MCF-7/ADR cells. Compared with free DOX, the as-prepared delivery system enhanced the chemotherapy efficacy against MCF-7/ADR cells, indicating the excellent capability for overcoming MDR. Furthermore, core–shell NaYF4:Yb/Er@NaGdF4 improved the upconversion luminescence (UCL) performance, and the designed delivery system could also be applied for simultaneous UCL and magnetic resonance (MR) imaging, which could be a good candidate as a dual-modal imaging nanoprobe. Therefore, we developed a multifunctional yolk–shell delivery system, which could have potential applications as a visualized theranostic nanoprobe to overcome MDR in breast cancer.
研究领域:
纳米技术
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癌症研究
·
材料科学
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生物医学工程
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药物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2026
·
IF 6.7
Yasheng Dai,Jie Yao,Shiyuan Wang,Changgan Lai,Jie Gong,Chenjie Gu,Tao Jiang,Kerong Wu
Exosomes are regarded as cancer-associated biomarkers for early diagnosis and prognosis in clinical bioassays. Nevertheless, it remains a challenge to develop an approach that can achieve ultra-sensitive and quantitative detection of exosomes. Herein, an innovative dual-mode immunoassay dependent on surface-enhanced Raman scattering (SERS) and upconversion luminescence (UCL) was developed to detect prostate cancer-derived exosomes. A novel SERS-active immunosubstrate was constructed by combining black phosphorus (BP) with Ag nanoparticles, which exhibited an enhancement factor (EF) of about 3.69 × 10 9 , due to the synergistic electromagnetic and chemical effects. Meanwhile, an immunoprobe with stable and visually distinguishable UCL was developed based on Yb/Er co-doped NaGdF 4 nanoparticles with an intrinsic two-photon process. The specific capture of exosomes was achieved through antigen-antibody binding within the sandwich immunostructure, achieving limits of detection (LOD) as low as 93 and 172 particles/mL based on the dual-modal detection, respectively. Furthermore, the recognition of different derived exosomes was simply realized by visually observing the green fluorescence with different intensities, which paves the way for efficient preliminary identification of prostate cancer. Finally, the validation with clinical serum samples proved that the proposed approach holds significant promise for rapid cancer screening and diagnosis.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Hanqing Liu,Yifei Zhou,Jing Xu,Le Ding,Chuan Liao,Tao Wang,Haifeng Zhou,Guangjun Zhou
High-efficiency detection of cadmium ions (Cd2+) and mercury ions (Hg2+) is crucial due to their harmful effects on the environment and human health. Here, we developed a ratiometric upconversion fluorescence (UCF)-based nanosensor by incorporating lanthanide-doped upconversion nanoparticles (UCNPs) and gold nanoparticles modified with trithiocyanuric acid (TMT-AuNPs) as specific recognition elements for the highly sensitive and selective real-time detection of Cd2+ and Hg2+. The developed nanosensor exhibited selective absorbance enhancement and UCF quenching behavior with the addition of Cd2+ and Hg2+ based on the inner filter effect (IFE). The sensitivity of the nanosensor was significantly enhanced by converting the change in absorbance into an exponential variation in UCF intensity. Therefore, the quantitative detection of Cd2+ and Hg2+ was achieved by measuring the UCF ratio I654/I540. In order to distinguish between Cd2+ and Hg2+, two biomolecules, glutathione (GSH) and ascorbic acid (AA), were used based on their different interactions with Cd2+ and Hg2+. GSH formed a specific tetrahedral complex (GSH)4Cd with Cd2+, thereby preventing Cd2+ from inducing changes in UCF intensity. In contrast, AA specifically reduced Hg2+, thereby preventing Hg2+-induced UCF changes. Thus, GSH and AA could also be detected. The limits of detection (LODs) of Cd2+, Hg2+, GSH, and AA were 2.8, 5.2, 5.1, and 7.2 nM, respectively. The designed detection platform provides a sensitive and straightforward sensing strategy for the multiplex detection of heavy metal ions and biological small molecules.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Leilei Sun,Tao Wang,Yuzhen Sun,Zexin Li,Haining Song,Bin Zhang,Guangjun Zhou,Haifeng Zhou,Jifan Hu
Dual-functional nanosensors based on small molecule regulation can be widely used due to their simplicity, high sensitivity and selectivity. Herein, glutathione (GSH) calibrated dual-functional system for GSH and cadmium ions (Cd 2+ ) detection based on fluorescence resonance energy transfer (FRET) between NH 2 –NaYF 4 :Yb,Er/NaYF 4 @SiO 2 upconversion nanoparticles (UCNPs) and gold nanoparticles (AuNPs) is designed. Unmodified AuNPs are easy to aggregate in high-salt solution and thereby quenching the red emission of UCNPs. The presence of GSH prevents the aggregation of AuNPs, so GSH can be detected by the changes in the color of solution and the recovery of red emission of UCNPs. However, Cd 2+ can interact with GSH, which makes AuNPs easy to aggregate, resulting in a gradual decrease in red emission of UCNPs. The fluorescence response of the system is linear with the concentrations of GSH and Cd 2+ in a wide range of concentrations, with low detection limits of 0.016 μM and 0.059 μM, respectively. Furthermore, the nanosensor demonstrates high selectivity for GSH and Cd 2+ detection and can be applied for the detection of GSH in human plasma and Cd 2+ in drinking water .
研究领域:
生物化学
·
分析化学
·
纳米科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2017
·
IF 4.162
Ling-Feng Jiang,Bo-Cheng Chen,Ben Chen,Xue-Jian Li,Hai-Lin Liao,Hong-Miao Huang,Zhan-Jing Guo,Wen-Yan Zhang,Lin Wu
A sensitive and stable bioassay for the detection of Aβ oligomer (Aβo), a potentially promising candidate biomarker for Alzheimer's disease (AD) diagnosis, was developed using Fe 3 O 4 magnetic nanoparticles (MNPs) as the recognition and concentration elements and BaYF 5 :Yb,Er upconversion nanoparticles (UCNPs) as highly sensitive labels, conjugated with the Aβo aptamer (DNA1) and the complementary oligonucleotide of the Aβo aptamer (DNA2), respectively. The DNA1 hybridized with DNA2 to form the duplex structure on the surface of the MNPs/UCNPs nanocomposites probe. When the target Aβo was introduced, the aptamer DNA1 preferentially bound with Aβo and caused the dissociation of some complementary DNA2, liberating some UCNP-labeled complementary DNA2 and leading to a decreased upconversion fluorescent intensity on the surface of MNPs. The decreased fluorescence intensity of UCNPs was related to the concentration of Aβo in the range of 0.2–15 nM with a detection limit of 36 pM. The developed method then was successfully applied to measure Aβo in artificial cerebrospinal fluid. Benefiting from the magnetic separation and concentration effect of MNPs, the high sensitivity of UCNPs, as well as the selectivity and stability of the aptamer, the present strategy offered valuable information related to early diagnosis of AD process.
研究领域:
纳米技术
·
生物材料
·
神经科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Siqi Zhang,Shuopan Dun,Xugeng Guo,Jinglai Zhang
Introducing upconversion nanoparticles (UCNPs) or fabricating TiO 2 hollow spheres (TiO 2 -HSs) are considered two feasible strategies to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). However, studies investigating a combination of UCNPs and TiO 2 -HSs for the application in DSSCs are still scarce. In this contribution, NaYF 4 :Yb,Er@NaGdF 4 :Nd@SiO 2 UCNPs and TiO 2 -HSs were synthesized and respectively applied as upconversion layers and scattering layers on the TiO 2 photoanode of DSSCs. The influence of different doping ratios of UCNPs on cell performance was explored. The present results reveal that the DSSCs device based on conventional P25 photoanode films incorporating the UCNPs with 10% can achieve a photovoltaic efficiency of 6.65%, showing 29.63% enhancement in comparison to the device without UCNPs. When the TiO 2 -HSs are used as scattering layers above the P25 film, the DSSCs device obtains a higher photovoltaic efficiency of 6.97%. More importantly, combining the UCNPs and TiO 2 -HSs can further enhance the photoelectrical property of DSSCs, realizing an optimal efficiency of 8.17%. Such an improvement can be attributed to a synergistic mechanism arising from the upconversion effect of UCNPs and the light scattering effect of TiO 2 -HSs. This work opens a new way of preparing composite photoanode films to improve the photovoltaic performances of DSSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Xinwen Liu,Bingchu Mei,Guolong Tan
Lanthanide-ion-doped red upconversion (UC) fluorescent materials with excellent signal-to-noise ratio, stability, and red-green luminous intensity ratio have proven of tremendous research importance for biomedical, three-dimensional (3D) displays, sensors, and other sectors. In this study, xYb, 1Er: Sr 5 (PO 4 ) 3 F (S-FAP) (x=0–5 at%) transparent ceramics with outstanding optical quality were fabricated by hot pressing the co-precipitation powder with high sintering activity. The energy dispersive X-ray (EDX) results showed that the trivalent lanthanide ions were evenly doped into the S-FAP ceramic lattice. Increased Yb 3+ doping considerably restricted the growth of ceramic grain size, which should be attributable to a decrease in sintering activity under high Yb doping conditions. The co-doping of Yb 3+ successfully resulted in a significant improvement in up/down conversion efficiency via effective energy transfer mechanisms and the optimization of the electron population at the energy level of red-green emission. Furthermore, single-band red upconversion luminescence with the greatest red-green upconversion luminescence integral intensity ratio of 125.74 was discovered under 980 nm laser pumping at room temperature. The energy transition process involved in the phenomenon of the up-conversion luminescence intensity shift of red-green emission has been thoroughly examined. Finally, the noncontact optical thermometric ability based on fluorescence intensity ratio (FIR) technology showed that the maximum absolute sensitivity (Sa) of the 5Yb1Er sample in the temperature range of 320–556 K is 1.1×10 −3 K −1 , implying the possible use of Yb/Er-doped S-FAP transparent ceramics in the field of optical thermometers.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 38
·2002066
·
IF 11.459
Kerong Deng,Lili Xu,Xin Guo,Xiaotong Wu,Yulian Liu,Zhimin Zhu,Qian Li,Qiuqiang Zhan,Chunxia Li,Zewei Quan
Engineering a facile and controllable approach to modulate the spectral properties of lanthanide-doped upconversion nanoparticles (UCNPs) is always an ongoing challenge. Herein, long-range ordered, distinct two-dimensional (2D) binary nanoparticle superlattices (BNSLs) composed of NaREF 4 :Yb/Er (RE = Y and Gd) UCNPs and plasmonic metallic nanoparticles (Au NPs), including AB, AB 3 , and AB 13 lattices, are fabricated via a slow evaporation-driven self-assembly to achieve plasmonic modulation of upconversion luminescence (UCL). Optical measurements reveal that typical red–green UCL from UCNPs can be effectively modulated into reddish output in BNSLs, with a drastically shortened lifetime. Notably, for AB 3 - and AB 13 -type BNSLs with more proximal Au NPs around each UCNP, modified UCL with fine-structured spectral lineshape is observed. These differences could be interpreted by the interplay of collective plasmon resonance introduced by 2D periodic Au arrays and spectrally selective energy transfer between UCNPs and Au. Thus, fabricating UCNP-Au BNSLs with desired lattice parameters and NP configurations could be a promising way to tailor the UCL through controlled plasmonic modulation.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Jin Liu,Boying Wang,Shuxin Li,Yao Wang,Jun Li,Yan Zhang,Christopher D. Snow,Matt J. Kipper,Soo Wohn Lee,Laurence A. Belfiore,Jianguo Tang
Advanced data storage and anti-counterfeiting technologies are critical in addressing modern information safety. In this work, novel nanocomposites of Eu3+, Tb3+, Zn2+ and -hyaluronan for down-conversion and NaGdF4:Yb,Er nanoparticles for up-conversion have been synthesized and applied for innovative anticounterfeiting luminescent inks. These inks exhibit excellent fluorescence under dual UV or NIR excitation, and sensitive quenching in response to some ions or compounds, enabling multi-level data encoding, reversible Cu2+ detection, and dynamic information concealment. Utilizing electrohydrodynamic (EHD) printing, we achieved precise patterns with line widths of approximately 20–50 μm, facilitating dynamic information concealment and secure data storage. The printed patterns, invisible under natural light, displayed distinct and bright fluorescence when stimulated by UV and NIR light, offering orthogonal readout capabilities for secure information retrieval. Additionally, the luminescent inks demonstrated remarkable sensitivity to Cu2+ ions, with fluorescence quenching efficiency reaching 85.3% at a Cu2+ concentration of 100 μg mL−1. The quenching process was reversible upon introducing ethylenediaminetetraacetic acid (EDTA), enabling up to three cycles of fluorescence recovery and suppression with minor degradation (<15%) in intensity after repeated use. The high-resolution EHD printing technology combined with excellent sensing performance, such as a detection limit of 1.2 μg mL−1 for Cu2+, enables a promising strategy for advancing intelligent information systems and hazardous ion detection. This work offers a versatile solution for secure information coding, anti-counterfeiting, and environmental sensing, providing a significant advancement in multifunctional luminescent materials, especially for smart quadruplicate information coding and hazard sensing, with dual UV/IR excitation.
研究领域:
纳米技术
·
材料科学
·
光学
·
信息安全
·
环境传感
·
分析化学
✓ 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）