Nanoscale
·
2018
·Vol. 10
·期 34
·15989-15997
·
IF 7.233
Panpan Zhang,Fulai Zhao,Peng Long,Yu Wang,Yuchen Yue,Xuanyu Liu,Yiyu Feng,Rongjin Li,Wenping Hu,Yu Li,Wei Feng
We describe sonication-assisted liquid-phase exfoliation of rhombohedral germanium telluride (α-GeTe) to obtain a good dispersion of α-GeTe nanosheets in ethanol. The thickness of the α-GeTe nanosheets is dependent on the exfoliation conditions, and few-layer α-GeTe nanosheets of 2–4 layers and even monolayer α-GeTe were obtained. We use first-principles calculations to investigate the structural, electronic, and optical properties of monolayer and bulk α-GeTe and compare the optical band gap of centrifugally fractionated α-GeTe nanosheet dispersions with the computational predictions. We demonstrate that few layer α-GeTe nanosheets are purified selectively through centrifugation, and they exhibit high sensitivity to Fe3+. The scalable production of two-dimensional α-GeTe nanosheets can be used in the future optoelectronic industry.
研究领域:
材料科学
·
化学
·
物理学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Youquan Zhou,Xiaoyu Huang,Binyun Xia,Xiaohan Chen,Xinyue Jing,Ning Wang,Jinhua Li
Precise detection of ferric ions (Fe 3+ ) plays a critical role in maintaining biological homeostasis, ensuring industrial process quality control, and safeguarding ecological safety. Recently, various detection methods and sensors have been widely developed for measuring Fe 3+ , but the tradeoff between their performance and practical applications has not been achieved, such as high sensitivity, excellent specificity, simple structure and fabrication, low cost, and so on. In this study, an optical fiber SPR sensor was developed sensor for detecting Fe 3+ based on the multimode-coreless-multimode (MNM) structured optical fiber. The refractive index (RI) sensitivity of the MNM fiber coated with a 60 nm Au film modified with gold nanoparticles (AuNPs) reached 3440.45 nm/RIU. The organic groups functionalized carbon quantum dots (CQDs) were synthesized and immobilized onto the Au substrates for specifically trapping Fe 3+ , which will cause the variation of the effective RI around the fiber, thereby resulting in the SPR wavelength shift in the transmission spectrum. By recording the red shift of the SPR wavelength, the amount of Fe 3+ could be accurately quantified. Upon detection of Fe 3+ , the sensor was demonstrated with great linearity within a wide detection range of 10 −12 to 10 −2 M. The sensor’s sensitivity was obtained to be about 2.07 nm/lg (M) and its limit of detection (LOD) was calculated to be about 2.88 × 10 −13 M. It was also experimentally proved with excellent selectivity and stability, as well as the potential application in simulated real samples. The proposed sensing platform offered a simple configuration for Fe 3+ detection with excellent performance and had various potential practical applications such as health monitoring, disease diagnosis, dietary planning, medication treatment monitoring, environmental monitoring, etc.
研究领域:
生物医学工程
·
分析化学
·
环境科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Juan Wang,Chunlan Li,Wensheng Liu,Yin Li,Yunzhu Ma,Shuwei Yao,Yufeng Huang
3Al 2 O 3 ·B 2 O 3 ·2SiO 2 ceramic fibers containing 0.01–1.09 wt% Fe 2 O 3 were successfully fabricated using a sol-gel method by adding Fe 3+ . All fibers possessed good strength and morphologies, and the effects of Fe 3+ on the microstructure, crystallization kinetics , and tensile strength of fibers were investigated. Results showed that added Fe 3+ promoted the crystallization of Al 4 B 2 O 9 phase since crystallization temperature and activation energy both decreased as the amount of Fe 2 O 3 increased. In addition, the morphology of Al 4 B 2 O 9 grains changed from globular to rod-like. The lattice parameters of Al 4 B 2 O 9 phase in fibers increased when Fe 3+ was added. XPS results confirmed that Fe 3+ broke down alumina network to create non-bridged oxygen bonds (NBO) that influenced lattice structure and shapes of Al 4 B 2 O 9 crystals. The addition of Fe 3+ is useful for regulating the microstructure and strength of 3Al 2 O 3 ·B 2 O 3 ·2SiO 2 fibers, and the tensile strength reached a maximum value of 1.5 GPa at 0.27 wt% Fe 2 O 3 .
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Zhonghao Li,Dan Li,Wenting Du,Yinuo Du,Guang Yang
Herein, fluorescent polymer dots (T-PDs) with excellent properties were synthesized through a facile magnetic stirring method using carboxymethyl cellulose derivative (CMC-NH 2 ) and tartaric acid (TA). The synthesized T-PDs exhibit a nanoscale structure, excellent stability and good fluorescence behavior with a fluorescence quantum yield of 12.5 %. Moreover, the T-PDs can be selected for the design of sensors for detecting Fe 3+ via the internal filtration effect (IFE) through a fluorescence quenching process. A good linear equation can be fitted between (F 0 -F/F 0 ) and the amount of Fe 3+ from 0 to 600 μM (R 2 = 0.998) and the detection limit (LOD) for Fe 3+ was determined to be 0.74 μM (3σ/slope). Additionally, the as-prepared sensing platform can be utilized for detecting Fe 3+ in real samples, which indicates its great potential for application in sensing. Interestingly, the fluorescence of the quenched system can be partially recovered by the addition L-cysteine. Thus, a fluorescent “ON-OFF-ON” switch can be designed, and a resettable and multireadout logic gate operation can be realized.
研究领域:
分析化学
·
材料科学
·
生物传感
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产品关联
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-8
·
IF 5.228
Li Jingshuai,Wang Qi,Guo Zhankui,Ma Hongmin,Zhang Yong,Wang Bing,Bin Du,Wei Qin
The combination of fluorescent nanoparticles and specific molecular probes appears to be a promising strategy for developing fluorescent nanoprobes. In this work, L-cysteine (L-Cys) capped Fe 3 O 4 @ZnO core-shell nanoparticles were synthesized for the highly selective detection of Fe 3+ . The proposed nanoprobe shows excellent fluorescent property and high selectivity for Fe 3+ due to the binding affinity of L-Cys with Fe 3+ . The binding of Fe 3+ to the nanoprobe induces an apparent decrease of the fluorescence. Thus a highly selective fluorescent chemosensor for Fe 3+ was proposed based on Fe 3 O 4 @ZnO nanoprobe. The magnetism of the nanoprobe enables the facile separation of bound Fe 3+ from the sample solution with an external magnetic field, which effectively reduces the interference of matrix. The detection limit was 3 nmol L −1 with a rapid response time of less than 1 min. The proposed method was applied to detect Fe 3+ in both serum and wastewater samples with acceptable performance. All above features indicated that the proposed fluorescent probe as sensing platform held great potential in applications of biological and analytical field.
研究领域:
分析化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 40
·14100-14108
·
IF 7.059
Zhihao Zhou,Xiaodong Yi,Puxian Xiong,Xingyi Xu,Zhijun Ma,Mingying Peng
Near-infrared (NIR) persistent luminescence (PersL) materials have recently evoked considerable interest in the field of biomedicine, but the choices of efficient emitters for NIR PersL phosphors are rather limited. Herein, we report a new class of Fe3+-activated NIR PersL phosphor based on the LiGaO2 host, which exhibits an intense NIR PersL at around 748 nm and possesses an ultra-long PersL time of much longer than 26 h. The optical properties of this phosphor as well as the trapping and de-trapping processes, the trap characteristics, and the underlying PersL mechanism are comprehensively studied by means of photoluminescence (PL), PersL, electron paramagnetic resonance (EPR), thermoluminescence (TL), and X-ray photoelectron spectroscopies (XPS). It was found that the NIR PersL in this material is closely related to the oxygen vacancies. Furthermore, the penetration experiments and cytotoxicity tests of the biological tissue show that this material has great potential for bioimaging applications. Our achievement in the case of nontoxic Fe3+-activated LiGaO2 phosphors lays the foundation for the future design of Cr3+-free PersL phosphors with efficient NIR PersL towards versatile bioapplications.
研究领域:
材料科学
·
生物医学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Jianfeng Liu,Ying Qian
In this work, a novel pyridylvinyl rhodamine-naphthalimide ratiometric fluorescent probe , In this work, a novel pyridylvinyl rhodamine-naphthalimide ratiometric fluorescent probe, RNVP , was synthesized and characterized by 1 H NMR, 13 C NMR and HRMS techniques. This probe shows high selectivity and sensitivity towards Fe 3+ and Hg 2+ . At a low concentration of Fe 3+ /Hg 2+ , a new emission peak appeared at 581 nm and enhanced significantly along with naked-eye sensitive color changes, which spirolactam-ring moiety of rhodamine was converted to the open-ring form in the presence of Fe 3+ /Hg 2+ . Further addition of Fe 3+ /Hg 2+ , the fluorescence intensity at 438 nm was enhanced rapidly, which attributed to the suppression of the PET process. The proposed sensing system of probe RNVP represented dual-channel and segment detection behavior, with the fluorescence “turn-On or Off” response and a very low detection limit of 2.72×10 −8 M and 9.08×10 −8 M, and the dissociation constant (Kd) were calculated to be 4.95×10 −7 M 3/2 and 6.68×10 −8 M 3/2 , respectively. RNVP also quick responded linearly to the acidic solution and monitor the pH change in the range of 2.92–4.5, as well as excellent reversibility.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
Micro & Nano Letters
·
2022
·Vol. 17
·期 14
·396-401
·
IF 0.98
You Zhang,Mingyang Li,Yanan Ding,Le Dai,Yue Wu,Yibo Zheng,Xiaoguang Li,Li Guan,Xu Li
Carbon dots (CDs) were paid more and more attention for detecting ferric ions (Fe 3+ ) containing in the organism or environment. Thus, nitrogen and phosphorus co-doping green CDs were synthesized using p-Phenylenediamine as the carbon source and phosphoric acid as phosphorus source by the solvo-thermal method. As-prepared CDs were characterized by morphology, optical properties, and surface functional groups. The CDs can emit better green light peak at 511 nm excited by 380 nm UV light. Excitation independence property of N, P-CDs was determined by measuring the photoluminescence (PL) spectra with different excitation wavelengths. The ions detection ability was investigated by analyzing the emission intensity of CDs in eight different kinds of ions solutions and different concentrations of Fe 3+ ions solutions. The N, P-CDs show high selectivity towards Fe 3+ ions with a limit of detection (LOD) of 0.11 μM in the concentration region of 300 to 450 μM. The results illuminated that this kind of CDs can be a candidate material for Fe 3+ ions detection.
研究领域:
材料科学
·
分析化学
·
环境科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Simin Lin,Chunmei Lai,Zejie Huang,Wei Liu,Lei Xiong,Yuxin Wu,Yanqiao Jin
Synthesis of lignin-based carbon dots (LCDs) with high quantum yield (QY), stable fluorescence properties and biocompatibility has been a challenge. Here, we propose an improved two-step strategy for producing high-quality LCDs from enzymatic hydrolysis lignin (EHL). The p-aminobenzenesulfonic acid used in the strategy not only provides nitrogen and sulfur elements, but also tailors the disordered three-dimensional structure of EHL. The successful co-doping of N and S elements favors the reduction of the optical energy bandgap (E g ), resulting in a high QY of 45.05% for LCDs. The LCDs exhibited superior selectivity and sensitivity for Fe 3+ with a limit of detection (LOD) of 0.15 μM when Fe 3+ concentration was 50–500 μM. In addition, LCDs demonstrated significant fluorescence in HepG2 cells and HepG2 cells loaded with LCDs at a concentration of 80 μg/mL showed good viability, suggesting that they are suitable for in vivo applications. The luminescent centers of LCDs change during pH regulation and thus show a special visual response to pH changes, making them have great potential for detecting metabolism in living cells. This work provides a novel and low-cost method for fabricating sustainable fluorescent probes for chemical sensing and bioimaging.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Hong Huang,Hua Li,Jiu-Ju Feng,Hui Feng,Ai-Jun Wang,Zhaosheng Qian
Herein, we reported a simple one-pot green method for preparation of fluorescent copper nanoclusters (Cu NCs) with a high quantum yield up to 8.6%, using glutathione as the stabilizing agent. The as-prepared Cu NCs had good water solubility, excellent stability and ultrafine size through the characterization of UV–vis absorption spectroscopy, fluorescence spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy. Experimental results showed that the fluorescence of Cu NCs was linearly quenched by the Fe 3+ concentrations in the range of 1–100 μM, with the detection limit of 0.3 μM. The as-formed Cu NCs were explored for the assay of Fe 3+ in real water samples.
研究领域:
分析化学
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2015
·Vol. 91
·期 4
·814-818
·
IF 2.266
Kai Zheng,Kai-Li Lou,Cheng-Hui Zeng,Sha-Sha Li,Zhi-Wen Nie,Shengliang Zhong
A new hybrid membrane was prepared by a facile method based on a highly luminescent lanthanide coordination polymer and agarose. The soft membrane was characterized by FT-IR, PXRD, SEM and luminescence. It is found that the soft membrane is a highly selective and sensitive sensor, among 19 metal ion solutions of Fe 3+ , Mg 2+ , Li + , Ca 2+ , Zn 2+ , Cu 2+ , Ba 2+ , Mn 2+ , Ru 3+ , Cr 3+ , Ag + , Sr 2+ , Cd 2+ , Na + , Ni 2+ , Pb 2+ , Fe 2+ , Hg 2+ and Ca 2+ , only Fe 3+ quench the luminescence. The sensing results can be distinguished by the naked eye in daylight or by irradiation of a portable UV light at the scene. Mechanism studies reveal the sensing is due to the decomposition of the coordination polymer 1 which induced by slow permeation of Fe 3+ . Further studies found anions of BO 3 − , CO 3 2 − , H 2 PO 4 − , Br − , Cl − , ClO 4 − , H 2 PO 4 − , I − , IO 3 − and NO 3 − will not quench the luminescence of the hybrid membrane, which imply that other anions in water would not disturb the detection result.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Lei Li,Jian Yang,Lei Yang,Fan Fu,Hao Xu,Ximei Fan
As one of the typical volatile organic compounds, toluene is harmful to human health and challenging to decompose effectively with traditional photocatalysts, such as TiO 2 or ZnO. Here, a trace Fe 3+ doped TiO 2 /Bi 2 WO 6 composite photocatalyst with abundant oxygen vacancies was successfully synthesized via a hydrothermal method and subsequently impregnation treatment. The Fe 3+ doped TiO 2 /Bi 2 WO 6 were optimized by adjusting the molar ration of TiO 2 and Bi 2 WO 6 , and the optimal molar ratio was found to be TiO 2 :Bi 2 WO 6 = 1:2. The obtained Fe (0.1) -TB 2 with only 0.1 wt% Fe 3+ dopant exhibited superior photocatalytic activity with over 90% toluene removal efficiency after 180 min under visible light irradiation. A series of characterizations reveal that the improved photocatalytic activity of Fe 3+ doped TiO 2 /Bi 2 WO 6 can be attributed to synergistic effects between the extension of photogenerated carrier lifetime and the increase of visible light absorption range by narrowing the energy bandgap (shortened about 0.32 eV) and the formation of oxygen vacancies. Furthermore, hydroxyl radicals and holes as the key reactive oxygen species (ROS) in the photodegradation reaction were confirmed by electron spin resonance (ESR) experiments. Therefore, introducing Fe-ions into TiO 2 /Bi 2 WO 6 photocatalysts is an effective way to enhance the photocatalytic activities, and the modified catalysts can be considered as a promising material for decomposing toluene and other VOCs.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
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