Journal of Materials Chemistry C
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2024
·Vol. 12
·期 9
·3254-3260
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IF 5.7
Dandan Men,Hong Wang,Qianqian Ding,Yingyi Wu,Ting Wu,Wenshan Qu,Liang Ma,Honghua Zhang,Guihua Jiang,Lifeng Hang
In numerous studies, it is imperative to establish a homogeneous refractive index (RI) surrounding environment to acquire a surface lattice resonance (SLR) characteristic peak for a plasmonic array. However, this requirement will limit the practical applicability of the SLR. This study successfully achieved the fabrication of cost-efficient, size-adjustable, and structure-transferable two-dimensional (2D) ordered gold (Au) near-spherical nanoparticle (NP) arrays with large NP size (>100 nm) through utilizing a colloidal crystal template and annealing process. In this method, the NP diameter can be adjusted by varying the thickness of the deposited Au film. Importantly, the fabricated 2D Au NP arrays with larger NP size supported an obvious and sharp SLR peak by exciting with normal incident light in an asymmetric air environment. These results indicated that if the arrays were well arranged and the NP size was large enough, index-matching was not necessary for the formation of far-field electromagnetic coupling of the plasmonic NPs. Furthermore, theoretical calculation demonstrated that the significant SLR signal in air environment was relevant to the NP size. Due to the obvious SLR peak in air, the 2D Au NP arrays were applied as a sensor to detect hemoglobin (Hb). It was found that the SLR peak was more sensitive than the localized surface plasmon resonance (LSPR) peak, and its offset was obviously observed when the Hb concentration was as low as 10 μM. Moreover, the Au NP arrays also displayed good uniformity and stability. Besides rigid nanophotonic sensor, the prepared 2D Au NP arrays on a quartz substrate can be transferred to a flexible substrate to form a flexible free-standing optical sensor, providing a real-time tunable SLR mode. With the decrease of water content, the SLR peak continuously blue-shifted from 1058 nm to 605 nm, displaying high sensitivity. This paper not only provides a cost-effective and controllable approach to fabricate next-generation rigid and flexible nanophotonic devices, but also paves the way for practical application of SLR in sensing.
研究领域:
纳米光子学
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等离子体学
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传感器
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xinyue Yuan,Wei Jiang,Jing Wang,Huilin Liu,Baoguo Sun
High-performance, multiporous imprinted microspheres were prepared from nitrogen-doped carbon dots (N-CDs) using a one-pot reverse microemulsion surface-imprinting method. Here, the N-CDs were exfoliated from a common layer covalent organic framework in a top-down preparation, and an ionic liquid was added to improve the sensitivity and the fluorescence stability. The multiporous imprinted microspheres were successfully applied to flonicamid optosensing in fruits and vegetables with simultaneous analysis of 96 samples by multifunctional enzyme labeling. The fluorescence sensing procedure was performed on recyclable multiporous imprinted microspheres coupling with the interface of N-CDs by taking advantage of the fluorescence-resonance charge-transfer strategy between the N-doped carbon dots and flonicamid molecules, quenching the fluorescence intensity. The multiporous imprinted microspheres exhibited purple fluorescence, which decreased sharply in intensity as the concentration of flonicamid increased. The fluorescence quenching correlation with the concentration of flonicamid showed good linearity in the range of 0.02–0.2 μg g–1 with a detection limit of 0.0059 μg g–1. This research not only enriches the foundational study of flonicamid residues but also greatly expands the potential applications of multiporous imprinted microspheres for analysis of pesticide residues in agricultural, food, and environmental monitoring.
研究领域:
材料科学
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分析化学
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环境科学
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农业科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Gongxi Qiao,Gui Chen,Qin Wen,Wanqiang Liu,Jinwei Gao,Zhiqiang Yu,Qianming Wang
The commercial production of carbon dots will be concerned with the simplicity and energy consumption. Herein, maleic acid and m-phenylenediamine form elegantly simple sources for carbon dots. The two precursors are dissolved in formamid (abbreviated as FA) or N, N -dimethylformamide (abbreviated as DMF) and the dehydration-condensation processes have been performed at 30 min or 120 min under room temperature. No external energy/irradiations, reactants or high temperature will be required and the afforded carbon dots (abbreviated as CDs) are collected by extraction, centrifugation, dialysis and column chromatography. It has been found for the first time the choice of organic solvents has been correlated with emission color. The blue-emitting CDs (abbreviated as B-CDs) and green-emitting CDs (abbreviated as G-CDs) are yielded in FA and DMF respectively. Facts support that the increase of –CONH- units causes red-shift in emissions. The optical sensing of tetracycline has been explored and the detection limit of blue-emitting CDs is as low as 25 nM. Live cells exposed to B-CDs and G-CDs (0.5 mg/ml) show no apparent changes via both Cell Counting Kit-8 and Annexin V/7-AAD analysis. The blue and green fluorescent signals can be easily tracked in cells. It has been demonstrated that the two carbon dots can be fabricated as multiple-color light-emitting diodes (abbreviated as LEDs).
研究领域:
材料科学
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化学
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纳米技术
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光学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2018
·Vol. 18
·期 7
·4607-4613
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IF 1.354
Zhang Jie-Jie,Ding Xu,Liu Dan-Dan,Guan Jian-Ning,Han Guo-Zhi
In this paper, we report a green and controllable synthetic method of gold nanoparticles (AuNPs) by directly β-CD reduction under mild conditions. Analysis of UV-vis spectra, along with TEM was applied to study the effects of experimental parameters on morphologies of the gold
nanoparticles. The corresponding formation mechanism of the nanoparticles was evaluated by redox potential. In particular, compared with the traditional method of sodium citrate or ascorbic reduction, this method can facilely realize multi-dimensional regulation. On this basis, we further
studied the dispersion behavior of the as-prepared gold nanoparticles in oil/water mixed system that would provide a possible strategy for optical sensor.
研究领域:
材料科学
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纳米技术
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分析化学
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环境科学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2018
·
IF 5.123
Shi Gang Liu,Shi Mo,Lei Han,Na Li,Yu Zhu Fan,Nian Bing Li,Hong Qun Luo
Ratiometric sensing suffers from less interference and can obtain more accurate results than single-signal assay. Here, a new ratiometric optical sensing strategy for H 2 O 2 detection is developed by etching silver nanoparticles (AgNPs) to deactivate fluorescence resonance energy transfer (FRET) and reduce Rayleigh scattering based on a hyphenated technique of fluorescence and second-order Rayleigh scattering (SRS). The ratiometric detection of H 2 O 2 is achieved through exploiting a hybrid system fabricated by fluorescent carbon dots and silver nanoparticles (CDs/AgNPs). In the CDs/AgNPs system, the fluorescence of CDs is quenched because of FRET, and the scattering is strong due to the intrinsic high light-scattering power of AgNPs. With the introduction of H 2 O 2 , the AgNPs are etched and the CDs are released from the AgNP surface, resulting in the fluorescence enhancement and scattering decline. As a result, ratiometric sensing of H 2 O 2 can be achieved based on the CDs/AgNPs system by simultaneous collection of fluorescence and SRS signals. The sensing system is further used for H 2 O 2 -generation bioanalysis, and as a proof-of-concept, ratiometric assay of glucose and evaluation of glucose oxidase activity are performed successfully. This work provides a new perspective for sensing applications of plasmonic nanoparticles.
研究领域:
分析化学
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纳米技术
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生物传感器
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
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IF 8.5
Lingqin Meng,Lizhong Zhang,Gengyu Liang,Bei Wang,Yang Xu,Han Li,Zishuo Song,Hui Yan,Cuixia Guo,Tian Guan,Yonghong He
The public health concern of antibiotic residues in animal-origin food has been a long-standing issue. In this work, we present a novel method for antibiotic detection, leveraging optical weak value amplification and harnessing an indirect competitive inhibition assay, which significantly boosts the system's sensitivity in identifying small molecule antibiotics. We chose chloramphenicol as a model compound and mixed it with chloramphenicol-bovine serum albumin conjugates to bind to the chloramphenicol antibody competitively. We achieved a broad linear detection range of up to 3.24 ng/mL and a high concentration resolution of 33.20 pg/mL. To further validate the universality of our proposed detection methodology, we successfully applied it to testing gibberellin and tetracycline. Moreover, we conducted regeneration experiments and real-sample correlation studies. This study introduces a novel strategy for the label-free optical sensing of small molecule antibiotics, greatly expanding the range of applications for sensors utilizing optical weak value amplification.
研究领域:
分析化学
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光学
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食品安全
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生物技术
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2018
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IF 2.746
Jingwen Feng,Yun Tao,Xiaoli Shen,Hua Jin,Tingting Zhou,Yusun Zhou,Liqin Hu,Dan Luo,Surong Mei,Yong-Ill Lee
In this study, an optosensing composite was fabricated by coating a molecularly imprinted polymer (MIP) layer onto CdTe quantum dots (MIP-QDs) to develop a fluorescent sensor for the determination of tetrabromobisphenol-A (TBBPA). The resulting MIP-QDs composite was well characterized and had ideal properties of morphology and photoluminescence . Under the optimized experiment conditions, this fluorescent sensor exhibited a good linearity with TBBPA covering the concentration range of 1.0–60.0 ng/mL and the detection limit was as low as 3.6 ng/g. This developed MIP-QDs sensor was successfully employed to detect TBBPA in electronic waste (e-waste) samples for the first time. The mean recoveries were in the range from 89.6% to 107.9% with the relative standard deviation below 6.2%, which were in accordance with the results of HPLC-UV method. The average concentration of TBBPA in electric fan and circuit board samples were 260.20 and 707.30 mg/kg, respectively. This study provided a simple, rapid, highly sensitive and selective method to detect TBBPA in e-waste samples.
研究领域:
环境科学
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分析化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Hongmei Deng,Meiling Liu,Zhaodong Liu,Minhua Su,Yue Gao,Danxing Yang,Yuxuan Liu,Liang Ma,Zhiqiang Yu,Tangfu Xiao,Jun Luo
Speciation of thallium (Tl) controls its fate and biogeochemical behaviors. Thus, a sensitive and accurately approach for Tl monitoring is of great demand due to its ultra-low concentration and sensitivity to redox change. In this study, diffusive gradients in thin-films technique (DGT) assembled with novel titanium peroxide (TP) binding gels (TP-DGT) was developed for in situ measurement of dissolved Tl(I) and Tl(III) in waters and sediments. Laboratory test showed a linear mass accumulation of Tl(I) and Tl(III) on the TP binding gels with the deployment time from 4 to 72 h. A fascinating performance of this novel DGT was achieved in a pH range of 4–9, ionic strength range of 0.1–200 mmol L −1 , and humic acid concentration of 0–30 mg L −1 with a low detection limit of 0.3 ng L −1 for Tl(I) and 0.6 ng L −1 for Tl(III). The TP binding gels own excellent stability (1–365 d) and high capacity (73.5 μg Tl disc −1 ) which are suitable for long-term monitoring. Field application in a river indicated that TP-DGT could work effectively, comparable to the grab sampling in waters. For the first time, the TP-DGT coupled with oxygen optode was successfully applied to map 2D distribution patterns of Tl and oxygen simultaneously in the rhizosphere of M. verticillatum L. This study confirms TP-DGT is a promising tool for routine monitoring of Tl in waters and for investigating biogeochemical processes of Tl in sediments.
研究领域:
环境科学
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分析化学
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地球化学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2017
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IF 4.95
Ziyu Han,Yanyan Wang,Xuexin Duan
This paper reports a surface functionalization strategy for protein detections based on biotin-derivatized poly( l -lysine)-grafted oligo-ethylene glycol (PLL- g -OEG x -Biotin) copolymers . Such strategy can be used to attach the biomolecule receptors in a reproducible way simply by incubation of the transducer element in a solution containing such copolymers which largely facilitated the sensor functionalization at an industrial scale. As the synthesized copolymers are cationic in physiology pH, surface biotinylation can be easily achieved via electrostatic adsorption on negatively charged sensor surface. Biotinylated receptors can be subsequently attached through well-defined biotin-streptavidin interaction. In this work, the bioactive sensor surfaces were applied for mouse IgG and prostate specific antigen (PSA) detections using quartz crystal microbalance (QCM), optical sensor (BioLayer Interferometry) and conventional ELISA test (colorimetry). A limit of detection (LOD) of 0.5 nM was achieved for PSA detections both in HEPES buffer and serum dilutions in ELISA tests. The synthesized PLL- g -OEG x -Biotin copolymers with different OEG chain length were also compared for their biosensing performance. Moreover, the surface regeneration was achieved by pH stimulation to remove the copolymers and the bonded analytes , while maintaining the sensor reusability as well. Thus, the developed PLL- g -OEG x -Biotin surface assembling strategy is believed to be a versatile surface coating method for protein detections with multi-sensor compatibility.
研究领域:
生物技术
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生物传感器
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分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Optical Materials Express
·
2021
·Vol. 11
·期 7
·2001-2015
·
IF 3.442
Hui Ma,Linlin Xu,Yue Tian,Anxin Jiao,Mengya Zhang,Shuang Li,Shuang Li,Ming Chen,Ming Chen
Surface enhanced Raman spectroscopy (SERS) with both enhanced activity and pronounced thermal stability is very suitable for ultra-sensitive monitoring of thermally assisted chemical bonding/fragmentation reactions in important industrial catalysis. Herein, we report an appealing thermally stable SERS active sensor based on the construction of multiple-branched Au/Ag nanodendrites (NDs). The obtained Au/Ag NDs with tremendous elongated branches and enormous antennas exhibit a much higher SERS activity for dye detection under 785 nm near infrared (NIR) laser irradiation, as compared to as-prepared other reference samples. Meanwhile, the corresponding unique intermetallic synergy can effectively suppress the oxidation of chemically active Ag in a hot environment. It is important that more than 90% SERS activity at room temperature (∼25 ℃) can be well maintained at high temperature (∼170 ℃) within 30 min continuous tests. Thus, it holds great potential for the in-situ SERS monitoring of high-temperature catalytic reactions in the future.
研究领域:
材料科学
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化学工程
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光学
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催化
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产品关联
DOI
高影响因子
ACS Nano
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2020
·
IF 14.588
Jianjian Zhao,Yaqing Liu,Aiyou Hao,Pengyao Xing
The emergence, amplification, and manipulation of chiroptical activity in self-assembled nanostructures, including circularly polarized absorbance and luminescence (CPL), remain considerable challenges. Here, we report the high-throughput synthesis of nanostructures with finely tailored chiroptical activities. Two fully π-conjugated benzimidazoles formed H-bonded complexes with natural hydroxyl acids (tartaric acid and mandelic acid), which self-assembled into diversified macroscopically chiral nanostructures. Synergistic coassembly allows for the emergence of Cotton effects and CPL with high dissymmetry g-factors (gabs up to 8 × 10–3, glum up to 3 × 10–3). The tartaric acid coassembled system exhibits enantiomer-independent left-handed CPL, which transforms into a cooperative ternary coassembly appended with enantiomer-resolved CPL with extended emission wavelength upon selective transition metal ion chelation. This H-boned coassembly system provides a vast number of chiral nanostructures with flexibly tuned Cotton effects and CPL, which also behaves as a selective chiroptical sensor to metal ions.
研究领域:
材料科学
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纳米技术
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物理化学
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光学
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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2016
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IF 7.476
Yaqiong Yang,Zhengzheng Wang,Hui Niu,Huiqi Zhang
A facile and efficient one-pot approach for the synthesis of quantum dot (QD)-labeled hydrophilic molecularly imprinted polymer (MIP) nanoparticles for direct optosensing of folic acid (FA) in the undiluted bovine and porcine serums is described. Hydrophilic macromolecular chain transfer agent-mediated reversible addition-fragmentation chain transfer (RAFT) precipitation polymerization was used to implement the molecular imprinting of FA in the presence of CdTe quantum dots (QDs). The resulting FA-imprinted polymer nanoparticles with surface-grafted hydrophilic poly(glyceryl monomethacrylate) brushes and QDs labeling not only showed outstanding specific molecular recognition toward FA in biological samples, but also exhibited good photostability, rapid binding kinetics , and obvious template binding-induced fluorescence quenching . These characteristics make them a useful fluorescent chemosensor for directly and selectively optosensing FA in the undiluted bovine and porcine serums, with its limit of detection being 0.025 μM and average recoveries ranging from 98% to 102%, even in the presence of several interfering compounds. This advanced fluorescent MIP chemosensor is highly promising for rapid quantification of FA in such applications as clinical diagnostics and food analysis.
研究领域:
材料科学
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纳米技术
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分析化学
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生物技术
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生物医学工程
✓ 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）