RSC Advances
·
2016
·Vol. 6
·期 112
·111052-111059
·
IF 3.289
Yuemei Li,Rui Wang,Yanling Xu,Jianjun Zhou,Zhihua Liu,Xiaojing Yan,Li Ma
ZnO:Yb3+,Tm3+,Ga3+ up-conversion nanoparticles (UCNPs) with sizes of between 20 and 65 nm are synthesized by the hydrothermal method. The size of the nanocrystals is affected by different Ga3+ concentrations. The variation in size has influence on the particles' visible blue and red up-conversion (UC) emission. In this paper, X-ray powder diffraction results show different amounts of gallium substituting for Zn in the ZnO lattice. When the concentration of Ga3+ is 3 mol%, the resulting UCNPs exhibit strong UC emission, longer fluorescence lifetime and narrower band gap. Due to their adjustable size and UC fluorescence properties, ZnO:Yb3+,Tm3+,Ga3+ nanocrystals have broad prospects for future applications in the biomedical field.
研究领域:
材料科学
·
纳米医学
·
生物光子学
·
无机功能材料
·
分子影像
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Anming Li,Zhaohan Li,Lijun Pan,Zhiwen Wang,Weiguang Chen,Qinqin Shao,Bingjie Wu,Yanan Tang
Multifunctional upconversion luminescent nanoheaters are realized based on NaGd(MoO 4 ) 2 :Yb 3+ /Tm 3+ nanocrystals synthesized by surfactant-free solvothermal method. The structure, morphology and composition of the nanocrystals are analysed by XRD , SEM, EDS , TEM, HRTEM and SAED techniques. Under 980 nm irradiation, NaGd(MoO 4 ) 2 :Yb 3+ /Tm 3+ nanocrystals emit blue luminescence with emission peaks located in the blue and near-infrared spectral regions. The electronic transition processes for the upconversion luminescence are discussed based on the excitation power-dependent upconversion luminescence, luminescent dynamics and Yb 3+ /Tm 3+ energy levels. The nanocrystals show efficient photothermal conversion after irradiated by 980 nm laser. The photothermal conversion slope efficiency for NaGd(MoO 4 ) 2 :Yb 3+ /Tm 3+ nanocrystals irradiated by 980 nm laser for 10 s duration is 17.43 °C/W for 10 mol% Yb 3+ doping and 43.64 °C/W for 15 mol% Yb 3+ doping. Multifunctional luminescent nanoheater NaGd(MoO 4 ) 2 :Yb 3+ /Tm 3+ nanocrystals exhibit both upconversion photoluminescence and photothermal conversion capabilities, and are promising candidates for temperature self-monitoring photothermal therapy or other biological applications.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2021
·
IF 2.436
Yang Yu,Sai Xu,Muhan Jiang,Ruixin Song,Jie Li,Yuefeng Gao,Xizhen Zhang,Xiangping Li,Hongquan Yu,Baojiu Chen
Upconversion core-shell nanoparticles with dual-function of temperature sensing and photothermal conversion are preferable in diagnose and treatment of cancer. Herein, NaYF 4 :Tm 3+ /Yb 3+ @NaYF 4 :Sm 3+ /Yb 3+ upconversion nanoparticles have been synthesized by a high-temperature thermal decomposition method. XRD and TEM are used to characterize the crystal structure and morphology of the samples. Temperature dependent upconversion spectra are measured under excitation of 980 nm within the scope of 303–498 K. The investigation on temperature sensing properties are on the basis of the luminescence intensity ratio of Tm 3+ . The designed core shell nanoparticles and bare core nanoparticles both have good temperature sensing performances, and the sensing properties of both are similar. Furthermore, the photothermal conversion performances are investigated ground on the power dependent temperature measurement, ethanol evaporation experiment and visual infrared thermal images. It is found that the photothermal conversion ability of the core-shell UCNPs is greatly improved by coating of the NaYF 4 : Sm 3+ /Yb 3+ outer shell.
研究领域:
纳米技术
·
生物医学工程
·
材料科学
·
癌症研究
✓ 已验证
产品关联
DOI
高影响因子
Aggregate
·
2023
·
IF 18.8
Xinyue Lao,Yuan Liu,Lihua Li,Menglin Song,Yingjin Ma,Mo Yang,Guanying Chen,Jianhua Hao
Outbreaks of infectious viruses offer a formidable challenge to public healthcare systems and early detection of viruses is essential for preventing virus propagation. In this work, an ultrasensitive plasmon-enhanced fluorescence resonance energy transfer (FRET) biosensor based on core-shell upconversion nanoparticle (csUCNP) and gold nanoparticle (AuNP) for accurate detection of SARS-CoV-2 viral RNA is presented. In this biodetection assay, the Tm 3+ /Er 3+ co-doped csUCNP NaGdF 4 :Yb/Tm@NaYF 4 :Yb/Er acts as an energy donor and AuNP serves as an energy acceptor. The upconversion emission of Tm 3+ and the design of the core-shell structure led to a simultaneous surface plasmon effect of AuNP. The localized surface plasmon resonance (LSPR) arising from collective oscillations of free electrons significantly enhanced FRET efficiency between Er 3+ and AuNP. The as-prepared biosensor obtained a limit of detection (LOD) as low as 750 a m , indicating that the integration of FRET and surface plasmon into one biodetection assay significantly boosted the sensitivity of the biosensor. In addition, samples extracted from clinical samples are also utilized to validate the effectiveness of the biosensor. Therefore, this innovative plasmon-enhanced FRET biosensor based on Tm 3+ /Er 3+ co-doped csUCNP may pave the way for rapid and accurate biodetection applications.
研究领域:
生物医学工程
·
纳米技术
·
病毒学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Yitong Lin,Taiyu Jin,Yu Liu,Jianhe Tang,Ying Tian,Xueke Liu,Liang Chen,Dawei Fang,Jun Wang
A coated Z-scheme NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd@NiO photocatalyst with core-shell structure is prepared by hydrothermal and coprecipitation methods. NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ as excellent up-conversion luminescent material can convert infrared light into visible light, broadening the light response range of CdS. Pd nanorods act as conductive channels and co-catalysts, leading to successful construction of titled photocatalyst, increasing contact area between two monomer photocatalysts, promoting transfer of photo-generated electrons. It also provides a large oxidation surface for organic pollutant degradation. The performance of prepared photocatalyst is assessed by Congo red degradation and hydrogen production . The emission spectrum and energy conversion mechanism of NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ are investigated. The photocatalyst with 3:1 NaGdF 4 :Nd 3+ ,Yb 3+ ,Tm 3+ @CdS-Pd and NiO mass ratio has a preeminent activity. Congo red degradation ratio and hydrogen production amount reach 92.48% and 653.06 µmol/g, respectively, under simulated sunlight irradiation for 180 min. The possible mechanism of organic pollutant degradation with synchronous hydrogen production caused by titled photocatalyst is proposed.
研究领域:
材料科学
·
环境科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2014
·
IF 1.716
J. Yuan,W.C. Wang,D.D. Chen,M.Y. Peng,Q.Y. Zhang,Z.H. Jiang
Enhanced 1.8 μm emission from Tm 3+ by Yb 3+ sensitization and bubbling in tungsten tellurite glasses has been demonstrated under the excitation of a 976 nm laser diode . Radiative properties such as spontaneous emission probabilities, radiative lifetimes and fluorescence branching ratios along with absorption and emission cross sections have been calculated from the absorption spectra . The influences of Yb 3+ concentration, Tm 3+ concentration, and bubbling time on spectroscopic properties have been thoroughly investigated. It is found that with increasing the bubbling time to 35 min, OH − content deceases sharply while 1.8 μm emission intensity improves greatly and 3 F 4 level lifetime prolongs to 1.57 ms close to radiative time. After 35 min, they change very little due to almost reaching the dynamic balance. The strength of interaction between Tm 3+ and OH − is determined. The energy transfer mechanism between Yb 3+ and Tm 3+ is proposed by photoemission spectroscopy and lifetime measurement. The energy transfer coefficients have been analyzed by the extended spectral overlap method and hopping model. Large ratio of the forward energy transfer from Yb 3+ to Tm 3+ to the backward one (223) and high energy transfer efficiency (97%) from Yb 3+ to Tm 3+ ensure efficient 1.8 μm emission. Hence, Yb 3+ sensitization and the reduction of OH − content could be expected to open up a possibility to achieve high efficient 2.0 μm lasing from Tm 3+ under a 976 nm LD pump.
研究领域:
光学材料
·
激光物理
·
固体激光器
·
光谱学
·
无机非金属材料
·
光子学
·
稀土发光材料
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Huazhen Liao,Song Ye,Jingxin Ding,Jianzhong Yu,Xinling Xv,Ling Pan,Peixuan Lin,Deping Wang
Enabling the drug delivery systems with drug release monitoring function is of essential importance to enhance therapeutic effectiveness. Herein, we took a ship-in-a-bottle synthesis strategy to construct the upconversion nanocrystal and zeolite compounded drug delivery system with real-time monitoring function, by using desilicated ZSM-5 zeolite as drug carrier and NaYF 4 : Yb 3+ /Tm 3+ nanocrystal as luminescent probe. Benefiting from the enlarged mesoporous in desilicated ZSM-5, the NaYF 4 : Yb 3+ /Tm 3+ nanocrystals can be successfully loaded inside and the upconversion emission intensity of Tm 3+ under 980 nm excitation was one order of magnitude enhanced after mild heat treatment. The drug release monitoring function were studied by using doxorubicin as model drug, the experimental results indicated that the upconversion emission intensity ratio of I 802nm /I 475nm can accurately evaluate drug release percentage. Further in vitro cytotoxicity evaluation suggested the doxorubicin-loaded [email protected] /DS/HT has excellent biocompatibility and is able to inhibit tumor cells effectively.
研究领域:
材料科学
·
纳米技术
·
药物递送系统
·
生物医学工程
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 9
·1752-1763
·
IF 3.756
Mingzhou Meng,Rui Zhang,Xinmeng Fa,Jianghua Yang,Zhenlong Cheng,Anees A. Ansari,Jun Ou,Christian Wurth,Ute Resch-Genger
A series of NaYF4:Yb3+/Tm3+@NaYF4:Yb3+/Er3+ nanoparticles doped with Tm3+ and Er3+ were successfully prepared by the solvothermal method. Under 980 nm laser excitation, intense upconversion emission peaks of Tm3+ and Er3+ were observed for all samples. By doping Tm3+ and Er3+ with core–shell partitioning, not only a significant increase in fluorescence intensity could be achieved, but also simultaneous temperature measurements on multiple thermocouple energy levels could be realised. In addition, the temperature sensing performance of different thermocouple energy levels was also investigated, and it was found that the 3F3 → 3H6 and 1G4 → 3F4 thermocouple energy level pairs of Tm3+ were the best, with maximum absolute sensitivity and maximum relative sensitivity of up to 0.0250 K−1 and 2.155% K−1 respectively, higher than the sensitivity of other thermocouple energy levels. It has a temperature resolution of less than 0.0139 K, which is lower than that of most materials available today. By using this material as a probe to build a fiber optic temperature sensor platform, it was found to have reliable temperature measurement performance.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-12
·
IF 4.259
Zhang Yanqiu,Chen Baojiu,Xu Sai,Li Xiangping,Zhang Jinsu,Sun Jiashi,Zheng Hui,Tong Lili,Sui Guozhu,Zhong Hua,Xia Haiping,Hua Ruinian
To realize photothermal therapy (PTT) of cancer/tumor both the photothermal conversion and temperature detection are required. Usually, the temperature detection in PTT needs complicated instruments, and the therapy process is out of temperature control in the present investigations. In this work, we attempt to develop a novel material for achieving both the photothermal conversion and temperature sensing and control at the same time. To this end, a core-shell structure with NaYF 4 :Er 3+ /Yb 3+ core for temperature detection and NaYF 4 :Tm 3+ /Yb 3+ shell for photothermal conversion was designed and prepared. The crystal structure and morphology of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Furthermore, the temperature sensing properties for the NaYF 4 :Er 3+ /Yb 3+ and core-shell NaYF 4 :Er 3+ /Yb 3+ @NaYF 4 :Tm 3+ /Yb 3+ nanoparticles were studied. It was found that the temperature sensing performance of the core-shell nanoparticles did not become worse due to coating of NaYF 4 :Tm 3+ /Yb 3+ shell. The photothermal conversion behaviors were examined in cyclohexane solution based on the temperature response, the NaYF 4 :Er 3+ /Yb 3+ @NaYF 4 :Tm 3+ /Yb 3+ core-shell nanoparticles exhibited more effective photothermal conversion than that of NaYF 4 :Er 3+ /Yb 3+ nanoparticles, and a net temperature increment of about 7 °C was achieved by using the core-shell nanoparticles.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Chunyan Zhang,Zhendong Fu,Feng Hong,Jingzhi Dou,Tengri Dong,Yunxiao Zhang,Dan Li,Guixia Liu,Xiangting Dong,Jinxian Wang
NIR light accounts for 50% of total solar energy, but only a small amount of the energy is applied to photocatalytic reactions. The incorporation of upconversion nanoparticles with semiconductor materials is an effective tactics to exploit NIR-driven photocatalyst . In this work, we report a composite material that can convert NIR light into UV–Vis photons. The light conversion material is composed of NaBiF 4 : Yb 3+ , Tm 3+ up-conversion nanocrystals . The petal-like Bi 2 WO 6 is used as a semiconductor photocatalyst to directly degrade model pollutants, such as RhB. By controlling the morphology of Bi 2 WO 6 , the contact area between the semiconductor photocatalyst and the pollutant molecules is increased. The preparation of “double bismuth” composite material NaBiF 4 :Yb 3+ , Tm 3+ /Bi 2 WO 6 provides the possibility to make full use of sunlight. Under the excitation of simulated sunlight, the photocatalyst of NaBiF 4 :Yb 3+ , Tm 3+ /Bi 2 WO 6 reaches the highest degradation efficiency of 98% in 27 min. Compared with Bi 2 WO 6 , the prepared composite photocatalyst shows better photocatalytic performance, which is attributed to the effective energy transfer between NaBiF 4 :Yb 3+ ,Tm 3+ and Bi 2 WO 6 . The capture tests were used to detect active species used in the degradation process. After four continuous photocatalytic cycles, about 95% of RhB solution is degraded. Under the simulated solar light illumination, the photocatalytic mechanism of the composite photocatalyst is discussed. The results propose a promising system to improve the photocatalytic activity through the efficient use of sunlight.
研究领域:
材料科学
·
环境科学
·
光催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tianzhi Jiang,Xuejiao Wang,Renguang Ye,Youjie Hua,Xinfeng Jin,Weigang Guo,Guoqing Liu,Zhiqiang Long,Buqing Zhang,Gongxun Bai,Junjie Zhang,Shiqing Xu
The quenching of luminescence in Er 3+ /Yb 3+ co-doped with Tm 3+ presents a dilemma as it substantially diminishes thermometric performance. In this study, Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ phosphors were synthesized using a homogeneous precipitation method combined with a sulfurization process. In addition, three sets of fluorescence intensity ratio (FIR) models were designed, which have self-calibration function. The effects of incorporation of Li + or Li + /Ba 2+ on the up-conversion luminescence (UCL) intensity and thermometric performance of the phosphors were systematically studied. The results show that the introduction of Li + or Li + /Ba 2+ co-doping leads to lattice distortion and the formation of oxygen ion vacancies in the lattice, which further accelerates the energy transfer process and mixes the charge transfer states , and ultimately dramatically improves the UCL and thermometric performance. The introduction of Li + and Li + /Ba 2+ co-doping enhanced the UCL of the materials by about 3.7 times and 5.6 times compared to Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ . When based on nonthermally coupled levels (NTCLs), the S r-max of Li + /Ba 2+ co-doped sample is 0.080 K −1 at 573 K, which is 87 % higher than that based on TCLs. These findings not only provide a new avenue for improving the UCL and thermometric performance but also provide an accurate self-calibration FIR model over a wide temperature range.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
DOI
高影响因子
ANALYST
·
2013
·Vol. 138
·期 8
·2392-2397
·
IF 3.969
Hong-Qi Chen,Fei Yuan,Shao-Zhen Wang,Juan Xu,Yi-Yan Zhang,Lun Wang
A new luminescence resonant energy transfer (LRET) system has been designed that utilizes near-infrared (NIR)-to-NIR upconversion lanthanide nanophosphors (UCNPs) as the donor, and Au nanorods (Au NRs) as the acceptor. The UCNPs were excited by a near-infrared (980 nm) wavelength and also emitted at a near-infrared wavelength (804 nm) using an inexpensive infrared continuous wave laser diode. The Au NRs showed a high absorption band around 806 nm, which provided large spectral overlap between the donor and the acceptor. Hg2+ ions were added to an aqueous solution containing the UCNPs and Au NRs that were modified with a Hg2+ aptamer. Then, a sandwich-type LRET system was developed for the detection of Hg2+ ions that had high sensitivity and selectivity in the NIR region. The method was successfully applied to the sensing of Hg2+ ions in water and human serum samples.
研究领域:
分析化学
·
纳米技术
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）