ACS Applied Nano Materials
·
2020
·
IF 0
Chunyu Qi,Li Chen,Yuan Gao,Yue Wang,Jing Li,Ligong Zhang,Yongshi Luo,Xiaojun Wang
Size and size distribution control along with the excitation/emission wavelength manipulation are the most indispensable for both fundamental research and applications of upconverting nanophosphors. In contradiction to the usual Ostwald ripening process, digestive ripening-mediated growth of core–shell nanostructures is observed in a lanthanide-doped ternary fluoride system. Time-dependent size evolution of NaYbF4:Tm@NaYF4 nanoparticles is systematically investigated, and a Ksp-involved growth mechanism is proposed to better understand this unusual phenomenon. The upconversion luminescence (UCL) intensity and branch ratio of near-infrared to visible emission (NIR/VIS) dramatically increase due to the NaYF4 coating but subsequently undergo a decline when an additional SiO2 layer grows outside. As a comparison, an alternant type of core–shell–shell nanostructure, NaYbF4:Tm@SiO2@NaYF4, is further constructed, in which both the UCL intensity and NIR/VIS ratio exhibit an inverse trend. The comparative analysis on the basis of steady and transient spectroscopic data from NaYbF4:Tm, and alternatively coated by silica and NaYF4 nanoshells, respectively, demonstrates that the UCL properties can be regulated through core–shell engineering once the optical behavior of the surface states can be manipulated. The results provide a promising alternative strategy to fabricate a uniform core–shell nanostructure with multicompositions, and this NIRin–NIRout luminescent profile deserves an expectable vision for the subsequent clinical applications of UCL imaging for deep biological tissues.
研究领域:
材料科学
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生物医学工程
·
光学
✓ 已验证
产品关联
DOI
FOOD CHEMISTRY
·
2021
·
IF 7.514
Hongqi Chen,Wei Tang,Yunchun Liu,Lun Wang
In this work, a quantitative image analysis method based on cyanine dye-upconversion nanoparticles composite luminescent nanoprobe for the detection of nitrite was developed. The nanoprobe was constructed by combining the NaYF 4 :Yb,Tm@NaYF 4 upconversion nanoparticles (UCNPs) and the new cyanine dye IR-790. The upconversion nanoparticles transferred energy to IR-790, resulting in the luminescence quenching, while the luminescence of UCNPs was recovered after adding NO 2 − . The increase in photons was related to the concentration of NO 2 − . Under the optimal experimental conditions, the detection range was 0.20–140 μM and the limit of detection was 0.030 μM. The measurement for NO 2 − can be completed in 29 min. The method has the characteristics of fast response (~0.1 s), low sample consumption (10 μL) and powerful data support (550 frame time series images). Furthermore, the quantitative image analysis method was successfully applied for the analysis of nitrite in environmental water and food samples.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Jian Zhang,Cong Cao,Jinsong Wang,Shiwen Li,Yu Xie
Multicolor upconversion luminescence (UCL) plays an essential role in anti-fake and information encipher. Here, we report a strategy to expand the color-adjustable emission range by regulating the doping concentration of Yb3+ in core@shell (C@S) upconversion nanoparticles (UCNPs) under the excitation of near-infrared (NIR) light at 980 nm and promoting the energy-transfer process. Subsequently, multicolor UCNPs were combined with acrylamide hydrogel to construct a three-dimensional (3D) information code with an adjustable emission color. The encoded information is readable only under 980 nm excitation light and disappears as soon as the excitation light is removed. We adopted three strategies to improve the security: multiple permutations and combinations of different emission light hydrogel blocks, the combination of rich optical information and binary code, and the shape coding of hydrogel blocks. Constructing a complex and changeable coding library significantly guarantees that the data can be enciphered and deciphered by simple light irradiation, and the content can be edited by permutation and combination combined with information coding rules. Therefore, it is expected to provide ideas for developing intelligent anti-counterfeiting materials and devices.
研究领域:
材料科学
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光学
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纳米技术
·
化学
·
安全技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Yinyin Chen,Xinying She,Zhouping Yang,Changfang Lu,Wei Zhang,Dongju Feng,Wei Wu,Xianxiang Wang
Doxorubicin hydrochloride (DOX), an anthraquinone-based antibiotic, is widely used in human tumors treatment. However, the residues of DOX in body would pose a threat to the health of heart and liver. Herein, a photochemical sensor NaYF 4 :Yb/Tm@NaYF 4 :Yb-Cit-CD (UCNPs) for detecting DOX has been developed in this paper. The fluorescence emission spectrum of UCNPs under 980 nm laser excitation has a wide range overlap with UV–vis absorption spectrum of DOX. Therefore, the fluorescence emission of UCNPs at 480 nm can be quenched by DOX. The UCNPs sensor has displayed a linear range of 0.05–20 μg/mL with a detection limit (LOD) of 0.005 μg/mL for DOX. Furthermore, the results of recovery for DOX in human serum samples is 98.68–104.20% and in accord with those obtained by HPLC and UV–vis.
研究领域:
生物医学工程
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药物分析
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纳米技术
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2017
·Vol. 9
·期 18
·3611-3617
·
IF 4.803
Wan-Ni Wang,Fu Zhang,Chuan-Ling Zhang,Yan-Chuan Guo,Wei Dai,Hai-Sheng Qian
Graphical ZnO way ! ZnO composite microfibers with different microstructures and embedded with a high population of upconversion nanoparticles are fabricated and show an excellent photocatalytic ability driven by near-infrared light. The fabrication of photocatalysts driven by near-infrared (NIR) light is of great scientific and technological interest to make use of solar energy. NaYF 4 codoped with Yb 3+ and Tm 3+ upconversion nanoparticles are important nanotransducers that transfer NIR photons to high-energy photons (UV/Vis). In this work, we demonstrated an electrospinning technique to synthesize ZnO and porous ZnO composite microfibers embedded with a large amount of NaYF 4 :Yb/Tm@NaYF 4 nanoparticles. The morphologies, chemical compositions, and phase of the as-prepared composites were investigated carefully by using field-emission scanning electron microscopy, TEM, X-ray photoelectron spectroscopy, fluorescence spectroscopy, and XRD. Steady-state and dynamic-state fluorescence spectra were used to demonstrate that the embedded NaYF 4 :Yb/Tm@NaYF 4 core–shell nanoparticles can activate the ZnO nanoparticles under IR irradiation. The ZnO composite microfibers can efficiently transfer the NIR photons to the excited state of ZnO and activate the semiconductor to produce reactive oxygen species to result in the degradation of rhodamine B dyes.
研究领域:
材料科学
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纳米技术
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光催化
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 14
·e202200161
·
IF 4.839
Bo Ling,Yaguang Wang,Ruo Mi,Di Wang,Hongqi Chen,Xiaohu Li,Ye Zhang,Lun Wang
Graphical NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles coated with Fe−TCPP metal-organic frameworks nanocomposite was designed and constructed for multimodal imaging and synergetic chemodynamic therapy/photodynamic therapy of tumors. Here, NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles (UCNPs) coated with Fe−Tetrakis (4-carboxyphenyl) porphine (TCPP) metal-organic frameworks (Fe-MOFs) nanocomposite (UCNPs@MOFs) was designed and constructed for multimodal imaging and synergetic chemodynamic therapy (CDT)/photodynamic therapy (PDT) of tumors. The UCNPs@MOFs were successfully applied for tumor cells imaging in vitro and in vivo in near-infrared (NIR) region. The doped Gd was used as contrast agent for the magnetic resonance imaging (MRI) of mouse tumors. The luminescence in the UV-vis region was absorbed by the Fe-MOFs to produce singlet oxygen ( 1 O 2 ) for PDT. The Fe 3+ doped in the MOFs can catalyze H 2 O 2 to produce oxygen and hydroxyl radical (⋅OH). Hydroxyl radical is used in CDT and cooperates with the 1 O 2 of PDT. Based on the CDT/PDT synergistic effects, the UCNPs@MOFs nanocomposite had obviously enhanced tumor inhibitory efficiency in vivo. These results described that the asprared UCNPs@MOFs nanocomposite have great potential in the effective multimodal imaging and treatment of tumors.
研究领域:
生物医学工程
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纳米医学
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肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yuxian Su,Li Liu,Shipeng Wen
Semiconductor photocatalysis is a promising strategy for wastewater treatment. However, a limited photoresponse range, rapid recombination of photoinduced charge carriers, poor stability, and other problems have posed obstacles to practical applications. Herein, a facile strategy to fabricate a near-infrared-driven broadband photocatalyst was developed by anchoring the core–shell nanostructure of NaYF4:Yb,Tm@NaYF4:Yb,Nd@TiO2 (Tm@Nd@TiO2) onto the surface of porous silica/carbon (mSC) electrospun fibers. The Tm@Nd@TiO2 nanoparticles (NPs) exhibited strong near-infrared light absorption and energy transfer from the NaYF4:Yb,Tm@NaYF4:Yb,Nd core to the TiO2 shell, triggering the photocatalytic reaction. In addition, the interconnected mesoporous structure and carbon network of Tm@Nd@TiO2/mSC was found to be beneficial in improving the adsorption capacity toward organic pollutants, promoting the separation of photogenerated carriers, and further improving the overall photocatalytic performance. The photocatalytic activity of Tm@Nd@TiO2/mSC nanocomposite was evaluated by degrading methyl orange solution in the visible-near-infrared and simulated sunlight regions. The Tm@Nd@TiO2/mSC nanocomposite exhibited excellent adsorption performance. The photocatalytic activity of Tm@Nd@TiO2/mSC was found to be 3 times higher than that of bare Tm@Nd@TiO2 over 60 min.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Xiaomin Ning,Na Liu,Jinyang Liu,Yue Wu,Jing Qian,Wenchao Zhang,Wen Gu
The practical application of light thermometer based on the FIR (520/540) has been greatly limited due to the strong absorption of green light by biological tissues. The sensitivity of the temperature sensor located in a biological window (FIR-BW) also needs to be improved. Based on this, we designed and synthesized an upconversion nanoparticles (UCNPs) with suitable R/G ratio and red visual output to prebreaking the limitation of strong absorption of biological tissue, while improving the sensitivity of temperature sensor and in vivo fluorescence imaging. In this paper, NaErF 4 :40%Tm@NaYF 4 , a high efficient red UCNPs with R/G ratio (6.86), is first utilized as an optical thermometer, accomplished through the fluorescence intensity ratio (FIR) of thermally coupled stark sublevels of 4 S 3/2 / 4 F 9/2 (FIR(540/654)). In the studied temperature range, the maximum absolute and relative sensitivity (S a and S r ) is 0.47% K −1 and 2.61% K −1 at 298 K, respectively, which is much higher than most previous reports about FIR-based temperature sensors. Additionally, we investigated the in vivo bioimaging behavior of NaErF 4 :40%Tm@NaYF 4 in detail. The superior biocompatibility, the distribution to the main organs with the blood circulation system, and the bright red fluorescence signals were observed under 980 nm laser radiation . All the results imply that NaErF 4 :40%Tm@NaYF 4 is a promising candidate for optical thermometry and in vivo bioimaging with high sensitivity.
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2023
·
IF 3.1
Aihua Zhou,Jiaxin Yang,Yan Li,Chengguo Ming,Yuanxue Cai,Yumiao Pei
Luminescence thermometry has recently been gaining popularity in science and technology fields. However, most reported works have used the fluorescence intensity ratio (FIR) to obtain the temperature based on thermally coupled energy levels (TCLs), which have hindered the sensitivity of the technique and limited its applications. Here, NaYF4:Yb/Tm@NaYF4:Yb/Ho microcrystals were prepared using a hydrothermal method. Based on the non-thermally coupled energy levels (NTCLs) of the double luminescent ionic centers Tm3+ and Ho3+, the materials exhibited temperature-dependent luminescence in the range of 304 K to 574 K. The maximum sensitivities were found to be Sa = 0.135 K−1 at 574 K and Sr = 1.101% K−1 at 484 K based on red (Tm3+) and green (Ho3+) emission bands. This study has provided a promising new strategy to break the TCL restriction and has shown the material to have potential applications in luminescence thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2018
·
IF 13.709
Jing Zuo,Langping Tu,Qiqing Li,Yansong Feng,Ivo Que,Youlin Zhang,Xiaomin Liu,Bin Xue,Luis J. Cruz,Yulei Chang,Hong Zhang,Xianggui Kong
Photoswitchable materials are important in broad applications. Recently appeared inorganic photoswitchable upconversion nanoparticles (PUCNPs) become a competitive candidate to surmount the widespread issue of the organic counterparts —photobleaching. However, current PUCNPs follow solely Yb3+/Nd3+ cosensitizing mode, which results in complex multilayer doping patterns and imperfectness of switching in UV–blue region. In this work, we have adopted a new strategy to construct Nd3+ free PUCNPs—NaErF4@NaYF4@NaYbF4:0.5%Tm@NaYF4. These PUCNPs demonstrate the superior property of photoswitching. A prominent UV–blue emission from Tm3+ is turned on upon 980 nm excitation, which can be completely turned off by 800 nm light. The quasi-monochromatic red upconversion emission upon 800 nm excitation—a distinct feature of undoping NaErF4 upconversion system—endows the PUCNPs with promising image-guided photoinduced “off–on” therapy in biomedicine. As a proof-of-concept we have demonstrated the imaging-guided photodynamic therapy (PDT) of cancer, where 800 nm excitation turns off the UV–blue emission and leaves the emission at 660 nm for imaging. Once the tumor site is targeted, excitation switching to 980 nm results in UV–blue emission and the red emission. The former is used to induce PDT, whereas the latter is to monitor the therapeutic process. Our study implies that this upconversion photoswitching material is suitable for real-time imaging and image-guided therapy under temporal and spatial control.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
诊疗学
·
光学成像
✓ 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）