CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Lefan Li,Tuanzhang Li,Pengfei Zhao,Jingyuan Guo,Chengpeng Li,Zhang Hu,Sidong Li,Chengyong Li
Continuous steam generation is still challenging for existing solar-powered interfacial evaporation systems due to insufficient sunlight exposure in overcast day and time from late afternoon to early morning. Here, we present a novel solar-afterglow driven interfacial evaporation system that leverages the effective absorption and thermal conversion stemming from the afterglow of strontium aluminate (SAO) and photothermal effects of the multi-walled carbon nanotubes/silver/polyacrylamide (MWCNTs/Ag/PAM). In virtue of these synergetic effects, this system demonstrates an evaporation rate of 2.91 kg·m −2 ·h −1 under one sun (1 kW m −2 ) in the daytime and an enhanced evaporation capacity of 5.61 kg·m −2 under SAO-induced afterglow overnight. This innovative strategy significantly broadens the utilizing solar energy and emitted fluorescence for continuous interfacial evaporation in seawater desalination.
研究领域:
材料科学
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环境科学
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能源工程
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产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Xiyang Zeng,Tao Chen,Yonggui Liu,Ting Zhang,Li Wang
In recent years, self-healing materials have attracted extensive attentions, however, the low elasticity have limited their applications, and it is difficult to track their healing process on macroscale. Herein covalently crosslinked polyurethane (PU) composite networks were developed with thermal induced self-healing capability and ultraviolet (UV) initiated fluorescence effect, which were synthesized by polytetrahydrofuran glycol (PTMG) as soft segment, hexamethylene diisocyanate (HDI) as hard segment, incorporating with blue phosphate (BP) of SrAl 2 O 4 doped with Eu 2+ , Dy 3+ . The physio chemical properties and self-healing process of polyurethane were studied by differential scanning calorimetry (DSC), X-ray diffraction (XRD), atomic force microscope (AFM), optical microscope (OM), dynamic mechanical analysis (DMA) and tensile test. The results showed that the network materials were successfully developed with high elastic tensile properties. After healing at 60 °C for one hour, the PU network demonstrated a high healing efficiency and elongation at break. Moreover, the obtained hybrid networks emitted an intense blue light under UV with high fluorescent intensity to track healing process. Additionally, the synergistic effect of transesterification of dynamic hydrogen bond provided the composite networks reproducibility for recycling use. This self-healing polyester material shows promising applications in the fields of diagnostic healing and optoelectronic components.
研究领域:
材料科学
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化学工程
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光学材料
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产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 54
·39908-39920
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IF 3.9
Dabin Liu,Wenzhang Zhu,Bin Qiu,Shiqian Zhang
Research has shown that the expression level of microRNA-155 (miRNA-155) is positively correlated with clinical stage and depth of invasion in patients with cervical cancer and cervical intraepithelial neoplasia and tends to be highly expressed. Therefore, it is very important to develop sensitive miRNA-155 analysis methods for the early diagnosis, treatment, and prognostic evaluation of cervical cancer. In this study, a near-infrared light-driven fluorescent biosensor based on the metal-enhanced fluorescence effect of polydopamine-coated upconversion nanoparticle (UP/Au) and two toehold-mediated strand displacement (TMSD) steps was constructed for the detection of miRNA-155. The target miRNA-155 can undergo a TMSD1 reaction with single-stranded DNA1 (ssDNA1) modified on wrinkled silica (WSNs) to form the ssDNA1/miRNA-155 complex and expose toehold 2. Through the TMSD2 reaction, ssDNA2 adsorbed on the UP/Au surface reacts with ssDNA1 to form the ssDNA1/ssDNA2 complex, which replaces miRNA-155 and enables the recovery of the UP/Au fluorescence signal. The target miRNA-155 was reacted with the new ssDNA1 to amplify the detection signal, with a detection range of 0.5–20 pM and a detection limit of 19.76 fM for miRNA-155. In addition, the fluorescent biosensor has been applied for the analysis of miRNA-155 in serum samples, indicating its good practicality.
研究领域:
生物传感技术
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分子诊断
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癌症研究
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2014
·Vol. 6
·期 15
·8681-8693
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IF 6.739
Xuefan Gu,Youshen Wu,Lingze Zhang,Yongchun Liu,Yan Li,Yongli Yan,Daocheng Wu
To improve the metal-enhanced fluorescence (MEF) effect of nanogolds (AuNPs) and accurately detect specific DNA sequences via DNA hybridization, novel hybrid magnetic nanoparticles/nanogold clusters (HMNCs) were designed based on finite-difference time-domain simulation results and prepared by using Fe3O4 and nanogolds. The nanogolds outside the HMNC were then conjugated with thiol-terminated DNA molecules, thus DNA modified-HMNCs (DNA–HMNCs) were obtained. The size distributions of these nanostructures were measured by a Malvern size analyzer, and their morphology was observed via transmission electron microscopy (TEM). The ultraviolet (UV)-visible (vis) absorption spectra of the samples were recorded with a UV-2600 spectrophotometer. Fluorescence spectra and the MEF effect were recorded using a spectrophotofluorometer, and lifetimes were determined using a time-correlated single photon counting apparatus. The prepared HMNCs were stable in aqueous solutions and had an average diameter of 87 ± 3.2 nm, with six to eight AuNPs around a single Fe3O4 nanoparticle. Fluorescein isothiocyanate (FITC) tagged DNA–HMNC conjugates exhibited a significant MEF effect and could accurately detect specific DNA sequences after DNA hybridization. This result indicates their various potential applications in sensors and biomedical fields.
研究领域:
生物化学
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纳米医学
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分析化学
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DOI
PubMed
高影响因子
DESIGNED MONOMERS AND POLYMERS
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2019
·
IF 1.528
Meng-Di Chen,Guo Zhang,Shi-Chang Chen,Xian-Ming Zhang,Wen-Xing Chen
In this study, 9-anthracenemethyl methacrylate (AMMA) and styrene (St) as monomers and benzoyl peroxide as an initiator were used to synthesize P(St-co-AMMA), a macromolecule tracer with a fluorescence effect, via free radical copolymerization. A fluorescent online detection device was built on the basis of the principle of fluorescence online detection by using the single-screw extrusion platform of a torque rheometer to explore the effect of the amount of macromolecular tracer and screw speed on the residence time distribution of polystyrene in single-screw extrusion. Fourier transform infrared spectroscopy, 1H-NMR, thermal stability, fluorescence properties, and rheological properties show that the resulting product P(St-co-AMMA) has a degree of thermal stability, fluorescence, and rheological properties similar to polystyrene, so this product can be used to characterize the residence time distribution during single-screw extrusion. The amount of macromolecular tracer P(St-co-AMMA) does not affect the residence time distribution of polystyrene during single-screw extrusion processing, meanwhile, the minimum residence time decreases and the residence time distribution becomes narrow as the screw speed increases, that is, the axial mixing capacity of the single-screw extruder decreases as the screw speed increases.
研究领域:
高分子化学
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材料科学
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聚合物加工工程
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Zhikun Zhang,Liwei Bai,Heli Tian,Jilong Han,Kunjie Li,Zhengjie Li,Qingju Liu
Fluorescent metal–organic frameworks (FMOFs) hold great promise for detecting biomolecules, but a comprehensive understanding of their response mechanisms is still challenging to guide the design of assays. Herein, we creatively proposed fluorescent analysis via the hydrogen-bond-triggered enhanced fluorescence effect between the oxygen of a carboxyl group of targets and an amino group of ligands in the FMOFs in an aqueous solution. Based on the above strategy, we synthesized the Ru@ZrMOF and constructed a ratiometric fluorescent and colorimetric dual-readout method for a simple and rapid platform to selectively detect amino acids. Taking l -glutamic ( l -Glu) and l -aspartic acid ( l -Asp) as examples, the introduction of l -Glu and l -Asp sharply increased the fluorescent value at 450 nm through strong hydrogen bonding, leading to a difference in the color from red to blue. Data from computational simulations point to the presence of strong hydrogen bonds between l -Glu/ l -Asp and FMOFs. Dual-mode fluorescent/colorimetric method selectively and accurately detects l -Glu acid and l -Asp within 30 min. The detection range for the two was found to be between 5 μM and 2 mM, with detection limits of 3 μM and 2.5 μM, respectively. In addition, a paper-based platform was fabricated and a logic gate was developed for the rapid and visual measurement of l -Glu and l -Asp. This platform is simple, quick, easy to use, and sensitive, making it a promising tool for future applications in amino acid detection, particularly in biological samples.
研究领域:
分析化学
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生物医学
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2022
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IF 12.545
Yingzhi Zhang,Jiayuan Fan,Jing Zhao,Zhangrun Xu
Exosomes, carrying specific molecular information of their parent cells, have been regarded as a kind of promising noninvasive biomarker for liquid biopsy. Plentiful fluorescence methods have been proposed for exosome assay. However, most of them are dependent on nucleic acid signal amplification strategies, which require complicated sequence design and experimental operation. Herein, a metal-enhanced fluorescence (MEF) biochip based on shell-isolated [email protected] 2 nanoparticle array was designed for simple and sensitive assay of exosomes. The designed method consists of only two parts: signal conversion and MEF amplification. The conversion of exosome signals to DNA signals was realized by means of chain displacement reaction. The subtle conversion effectively averts the effect of steric hindrance on MEF while amplifying the signal easily for the first time. The MEF biochip based on shell-isolated [email protected] 2 nanoparticle array achieves a second signal amplification in a simple way. Profiting from the two signal amplifications, this strategy displays high sensitivity toward exosomes with a detection limit of 4.5 × 10 3 particles μL −1 . Compared with the result without MEF, the sensitivity is enhanced about thirty times. As far as we know, this is the first attempt for exosome assay by using MEF strategy. In addition to the favorable fluorescence enhancement, both shell-isolated [email protected] 2 nanoparticles and [email protected] 2 nanoparticle array show excellent stability in buffer solutions, which is conducive to practical application. Moreover, the proposed method is able to distinguish breast cancer patients from healthy people, showing its potential for exosome-based liquid biopsy.
研究领域:
生物医学工程
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纳米技术
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癌症研究
·
分子诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2023
·
IF 6
Chenfei Han,Yu Xiao,Zhenjiang Liu,Daolin Du,Ming Li
To improve the performance of aptasensor, the coupling of novel material and strategy had been the hottest research with the promising prospects. In this study, a cascade amplifying aptasensor (CA-aptasensor), which had coupled the DNase I-assisted cyclic enzyme digestion and AgNPs@gel-enhanced fluorescence, had reflected the desired performance for positively correlated detecting OTA . For this purpose, the GO@PVP was used to adsorb and quench the free FAM-Apt, while the complex of OTA and FAM-Apt was digested by the DNase I. The released OTA allowed the free FAM-Apt to separate from the GO@PVP cyclically, thus the OTA level was amplified preliminarily. The AgNPs@gel could combine with the released FAM to form the metal enhanced fluorescence (MEF) effect, resulting in the cascade signal amplification. The OTA was detected at pg mL −1 level with an ultrasensitive LOD of 3.33 pg mL −1 and IC 50 of 13.6 pg mL −1 , which improved 90-fold and 728-fold than that of ELASA for same aptamer. The CA-aptasensor indicated high specificity, reliability and practicability. Meanwhile, the CA-aptasensor exhibited more highlights, including the efficient homogeneous system, low background signal and standardized aptamer recognizer. This study might provide a new approach for improving the performance of aptasensor, which could also guide the signaling cascade and positively correlated detection for other risk factors.
研究领域:
分析化学
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生物传感器
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纳米技术
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食品安全
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）