Polymers
·
2019
·Vol. 11
·期 2
·266
·
IF 3.164
Lin Wu,Tao Pang,Yebin Guan,Yiguo Li
This work presents a simple and facile strategy for the creation of Prussian blue containing polymeric nanocapsules. An crosslinked inverse miniemulsion with a formula of water/ K4Fe(CN)6/1,2-bis-(-2-iodoethyl) ethane(BIEE)/ toluene/ PDMAEMA-b-PS stabilizer mixture was prepared as soft template firstly. A crosslinking nanocapsule structure with K4Fe(CN)6in water core could be achieved by a crosslinking reaction between PDMAEMA-b-PS stabilizers and BIEE. Upon the following addition of FeCl3ether solution into the oil phase of this inverse miniemulsion, a coordination reaction between two iron salts occurred immediately to form a Prussian blue complex. Due to the solubility limitation of FeCl3in the oil phase of the miniemulsion, forcing the coordination reaction of K4Fe(CN)6and FeCl3mainly occurred at the oil-water interface of the nanocapsules, resulting in a soft polymer/Prussian blue(PB) hybrid nanocapsule.Keywords:polymeric hybrid nanocapsule;Prussian blue;inverse miniemulsion;coordination
研究领域:
材料科学
·
化学
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产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2019
·Vol. 16
·期 2
·383-389
·
IF 3.399
Yaping Zhang,Bin Zhen,Yue Hu,Guohong Liang,Yaqing Feng
Reverse micellar systems possess a characteristic nanoscale water-in-oil (w/o) structure and can offer mild conditions as a unique and versatile reaction medium. Reverse microemulsions containing water/TX-100 + hexanol/hexane are studied in this work through experimental techniques and simulation methods. Surfactant dosages and water amount affect the micellar structure profoundly, and the polydispersity of the surfactant molecules affects the micellar structure remarkably. TX-100 with 9–10 EO units can form micelles in a simply piling way, while TX-100 with 5–10 EO units endows the micelles with a hierarchical micellar interface and a more compact structure, leading to monodisperse micelles with a smaller diameter. Water in the polar cores has three states. In the reverse micellar system using TX-100 with 9–10 EO units, hydrolysis of tetraethoxysilane happens rapidly and the formed silica gels are apt to aggregate, resulting in polydisperse silica nanoparticles. For the micellar system using TX-100 with 5–10 EO units, the micellar hierarchical distributed interface facilitates the material exchange of tetraethoxysilane and limits the hydrolysis of tetraethoxysilane inside the micelles, providing monodisperse silica nanoparticles.
研究领域:
胶体化学
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材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2022
·Vol. 33
·期 3
·1111-1123
·
IF 2.525
Zhang Dianwei,Zhang Furui,Wang Shengnan,Hu Sha,Liao Yonghong,Wang Fenghuan,Liu Huilin
Amino- and sulfhydryl- functionalized biomass carbon dots (BCDs) were prepared by one-pot reverse microemulsion for specific recognition of ferric ions (Fe 3+ ) and L-cysteine (L-Cys). Green grapefruit peel was used as the carbon source while aminosilane and mercaptosilane were used as N- and S-supplier. Following the adsorption of Fe 3+ on the surfaces of BCDs-NH 2 and BCDs-SH, the fluorescence responses was quenched step by step, while adding L-Cys to the BCDs-NH 2 /Fe 3+ system restored the fluorescence. The BCDs-NH 2 and BCDs-SH system exhibited extremely low limits of detection for Fe 3+ of 3.2 and 3.0 nM, respectively, within a wide linear ranges of 0.006–200 μM and 0.004–200 μM, respectively. The BCDs-NH 2 /Fe 3+ systems were used as an optosensor for L-Cys in the concentration ranges of 0.08–30 and 30–1000 μM with a detection limit of 65 nM. Developed BCDs-NH 2 and BCDs-SH were able to respond to Fe 3+ in water samples with satisfactory recoveries of 100.1%-103.1% and 94.6%-108.5%, respectively, and the BCDs-NH 2 /Fe 3+ system was also able to respond to BCDs-NH 2 /Fe 3+ in actual lake water samples with recoveries from 87.3% to 98.8%. Meanwhile, The BCDs-NH 2 exhibited good photoluminescence and stability, and the with a fluorescence quantum yield was as high as 25%. This work demonstrates the feasibility of using such materials to remove hazardous ions from water and employing the resulting complexes for optosensing in a sustainable manner.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 14
·11317-11324
·
IF 2.22
Cai Jixiang,Huang Bing,Zhang Jianghong,Hu Xin,Li Youwen,Xue Jiangpeng
Nano-silica particles were prepared using chlorosilane residual liquid as raw materials in an inverse microemulsion system formed by three different surfactants (TX-100, CTAB, SDS) with n -hexanol, cyclohexane, and ammonia. The phase behavior of inverse microemulsions and the preparation of nano-silica were investigated. The results showed that the system composed of non-ionic surfactant TX-100 had a larger inverse microemulsion region than other two system and was more suitable for the preparation of nano-silica. The prepared nano-silica had uniform sphericity and good dispersibility, the average particle diameter of 31 nm, and the variance of 1 nm. XRD, FT-IR, N 2 adsorption/desorption experiments and TG-DSC analysis were used to characterize the prepared nano-silica. The results showed that the prepared nano-silica was amorphous mesoporous silica with a BET specific surface area of 472.5 m 2 /g. They have a good thermal stability, and the phase structure and main chemical functional groups of nano-silica would not change after calcination at 600 °C, but the nano-silica would undergo a phase change at 1135 °C, which changed from amorphous to crystalline. The new technology not only broadened the source of preparation of nano-silica materials, but also provided new ideas for the treatment of chlorosilane residual liquid and the sustainable development of polysilicon industry.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 57
·51591-51597
·
IF 3.289
Dongdong Lu,Fangyuan Gai,Zhen-An Qiao,Xue Wang,Tao Wang,Yunling Liu,Qisheng Huo
This work demonstrated that a series of ultrabright fluorescent silica nanoparticles have been synthesized and designed via the reverse microemulsion method to encapsulate (2,2′-bipyridine)2-(5-aminophenanthroline) Ru bis(hexafluorophosphate) (Rubpy-phen). Transmission electron microscopy (TEM), scanning electron microscopy (SEM), dynamic light scattering (DLS), inductively coupled plasma (ICP) and fluorescence spectra were used to study the morphology and properties of the nanoparticles. By introducing ethanol into the reaction system, the obtained uniform fluorescent nanoparticles showed monodispersity and controllable size. With an increase of nanoparticle size (from 50–180 nm), the relative brightness of the nanoparticles was greatly improved from 534 to 86 972 by comparison with free dye molecules. Due to the protection of the silica matrix, the fluorescence of high concentration dye-doped silica nanoparticles (Rubpy-phen NPs) is not quenched, which results in higher fluorescence intensity and relative brightness. Moreover, the silica matrix can also protect Rubpy-phen from leakage. Due to the high brightness and biocompatibility, Rubpy-phen NPs have potential applications in the biological field.
研究领域:
材料科学
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生物学
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纳米医学
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2011
·Vol. 18
·期 2
·526-531
·
IF 5.476
Yingyi Ma,Jing Liang,Hang Sun,Lixin Wu,Yongqiang Dang,Yuqing Wu
Graphical Honeycomb hideout : An ordered protein pattern on a polymer surface was successfully constructed by using the inverse microemulsion method with high reproducibility and wide generality to different polymers and solvents through the dissolution of protein in water beforehand. The formed protein patterns can be locally modified and applied for the detection of other proteins through specific recognition (see figure). Here we report the rapid and convenient patterning of proteins on porous polymer film using the inverse microemulsion approach. Following this method, proteins, which were dissolved in water, were transferred into dichloromethane solution of polymers through the formation of inverse microemulsion by mixing the two solutions. The protein-containing microemulsion droplets accumulated automatically into large and stable ones on the surface of organic solution casting on solid substrates, and formed tightly packed microemulsion droplet arrays driven by surface tension. With the evaporation of organic solvent and water, the microemulsion droplet arrays, which act as the template, turn to honeycomb patterned pores bearing proteins in them. The formed protein patterns can be locally applied for the detection of other proteins through specific recognition. The generality and reproducibility for the formation of BSA/PS microporous film and protein patterning by using different polymers and solvents were demonstrated by investigating surfactant addition, polymer and solvent types, and casting volume on the morphology of the microporous films. A preliminary mechanism for the protein patterning is discussed based on the analysis of the experimental results.
研究领域:
材料科学
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生物技术
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Antioxidants
·
2024
·
IF 6
Xiao Xiao,Feiyu Yang,Yuling Huang,Shaohui Liu,Zhenhua Hu,Shanggao Liao,Yuanyuan Li
Numerous approaches targeting hepatic stellate cells (HSCs) have emerged as pivotal therapeutic strategies to mitigate liver fibrosis and are currently undergoing clinical trials. The investigation of herbal drugs or isolated natural active compounds is particularly valuable, due to their multifaceted functions and low risk of side effects. Recent studies have hinted at the potential efficacy of verbascoside (VB) in ameliorating renal and lung fibrosis, yet its impact on hepatic fibrosis remains to be elucidated. This study aims to evaluate the potential effects of VB on liver fibrosis by assessing its ability to inhibit HSC activation. VB demonstrated significant efficacy in suppressing the expression of fibrogenic genes in activated LX-2 cells. Additionally, VB inhibited the migration and proliferation of these activated HSCs by scavenging reactive oxygen species (ROS) and downregulating the AMPK pathway. Furthermore, a biosafe reverse microemulsion loaded with VB (VB-ME) was developed to improve VB’s instability and low bioavailability. The optimal formulation of VB-ME was meticulously characterized, revealing substantial enhancements in cellular uptake, ROS-scavenging capacity, and the suppression of HSC activation.
研究领域:
药理学
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肝病学
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药物递送系统
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 12
·5773-5779
·
IF 3.3
Jinxu Cao,Feng Shi,Long Chen,Xuemei Xu,Zhen Chen,Zhanjun Yang,Xingmao Jiang
Bio-activity conservation of biomolecules after immobilizing in nanomaterials has been a tough challenge, especially in biomedical applications. Herein, we developed a novel freezing-assisted reverse microemulsion method to encapsulate water-soluble enzymes in hollow mesoporous silica nanospheres (HMSNs) for maximumly maintaining enzyme bio-activity. Firstly, a low-temperature and ethanol-free synthesis was carried out, and glucose oxidase (GOx) as a model enzyme was encapsulated into HMSNs to obtain GOx@HMSNs. The TEM and SEM images showed a uniform sphere morphology of GOx@HMSNs with a large hollow cavity for GOx loading. The element mapping, FTIR spectrum and TGA curve further confirmed the effective physical encapsulation of GOx in HMSNs, which can maintain stable bio-activity as verified by the enzyme activity assay. In addition to the facile synthesis for avoiding enzyme-denaturation, the N2 adsorption–desorption curves further demonstrated that small mesopores on HMSNs for blocking enzyme leakage may be another important factor for conserving GOx activity. Finally, GOx@HMSNs as a biosensor significantly possessed a wider linear range of 0.06 mM to 2.61 mM with a low detection limit of 0.01 mM, indicating high sensitivity. Therefore, our synthesis method provides a promising approach for biomolecule immobilization with potent bio-activity and biosensor applications with superior sensitivity.
研究领域:
生物材料学
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生物医学工程
·
酶工程
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产品关联
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Yunyan Ren,Zhefeng Fan
Among the tetracycline antibiotics, chlortetracycline (CTC) is the most frequently used antibiotic except for tetracycline (TC) for enhancing the ability of the organism to fight bacterial infections. The poor metabolism and degradability of CTC can cause serious health effects. Most studies have focused on the detection and analysis of TC, and research on CTC is relatively scarce. This is because the structures of CTC and TC and oxytetracycline (OTC) are extremely similar, and even indistinguishable. In this study, CTC was used as a template molecule and a molecularly imprinted layer was coated on the surface of highly fluorescent N-CDs using a reversed-phase microemulsion method to form N-CDs@MIPs. It was possible to specifically identify CTC without the influence of TC and OTC, which are extremely similar in structure. By comparing with the non-imprinted polymer (N-CDs@NIPs), it exhibited high sensitivity and selectivity with an imprinting factor of 2.02. And it was used in the determination of CTC in milk with recoveries and relative standard deviations of 96.7%–109.8% and 0.64%–3.27%, respectively, with high accuracy and precision. The specificity of the measurement is excellent compared with other assays, and it is a valid and reliable assay.
研究领域:
分析化学
·
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2019
·Vol. 15
·期 19
·1900484
·
IF 10.856
Xiaosheng Tang,Weiwei Chen,Zhengzheng Liu,Juan Du,Zhiqiang Yao,Yi Huang,Cheng Chen,Zhaoqi Yang,Tongchao Shi,Wei Hu,Zhigang Zang,Yu Chen,Yuxin Leng
All-inorganic semiconductor perovskite quantum dots (QDs) with outstanding optoelectronic properties have already been extensively investigated and implemented in various applications. However, great challenges exist for the fabrication of nanodevices including toxicity, fast anion-exchange reactions, and unsatisfactory stability. Here, the ultrathin, core–shell structured SiO 2 coated Mn 2+ doped CsPbX 3 (X = Br, Cl) QDs are prepared via one facile reverse microemulsion method at room temperature. By incorporation of a multibranched capping ligand of trioctylphosphine oxide, it is found that the breakage of the CsPbMnX 3 core QDs contributed from the hydrolysis of silane could be effectively blocked. The thickness of silica shell can be well-controlled within 2 nm, which gives the CsPbMnX 3 @SiO 2 QDs a high quantum yield of 50.5% and improves thermostability and water resistance. Moreover, the mixture of CsPbBr 3 QDs with green emission and CsPbMnX 3 @SiO 2 QDs with yellow emission presents no ion exchange effect and provides white light emission. As a result, a white light-emitting diode (LED) is successfully prepared by the combination of a blue on-chip LED device and the above perovskite mixture. The as-prepared white LED displays a high luminous efficiency of 68.4 lm W −1 and a high color-rendering index of Ra = 91, demonstrating their broad future applications in solid-state lighting fields.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
半导体物理
·
固体照明
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无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
Processes
·
2025
·Vol. 13
·期 9
·2903
·
IF 2.8
Ping Guo,Yong Li,Yanbao Liu,Yunlong Zou
In this study, a new type of double crosslinked nanospheres (DCNPM-A) was developed to solve the problem of gas channeling caused by fracture development in the process of CO2oil displacement, and the microsphere system with delayed swelling was successfully synthesized by inverse micro lotion polymerization. The microsphere adopts a dual crosslinking structure of stable crosslinking agent (MBA) and unstable crosslinking agent (UCA), achieving intelligent sealing function of shallow low expansion and deep high temperature triggered secondary expansion. The successful preparation of microspheres was verified by characterization methods such as Zeta potential and SEM, and the effects of reaction temperature, time, initiator and crosslinking agent dosage on microsphere properties were systematically studied. The experimental results show that DCNPM-A microspheres exhibit excellent expansion performance, thermal stability, and acid resistance in acidic, high-temperature, and high mineralization environments. Their expansion ratio can reach 13.5 times, and they can maintain stability for more than 60 days in supercritical CO2environments. Core displacement experiments have confirmed that the microspheres have the best sealing performance in matrices with a permeability of 10 × 10−3μm2and fractures with a width of 0.03 mm. The combination of 0.8 PV injection volume, 0.5 mL·min−1injection rate, and continuous injection method significantly improved the plugging rate and recovery rate of CO2flooding. This study provides new technical support for the efficient development of low-permeability fractured reservoirs.
研究领域:
石油工程
·
提高采收率
·
高分子材料科学
·
油藏工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Yi Shang,Zhihai Cao,Hangnan Chen,Yangyi Sun,Jia Yao,Lin Yang,Dongming Qi,Ulrich Ziener
In our previous paper, we reported the synthesis of easily recyclable and highly active rice roll-like (RR-like) Au/SiO 2 nanocatalysts (NCs) in inverse miniemulsions [Colloids Surf. A 517, 2017, 52–62]. In the present contribution, the influences of three key synthesis parameters, including the 3-aminopropyltriethoxysilane (APTES) content, reaction temperature, and urea amount, on the particle properties of the Au/SiO 2 NCs were systematically investigated. The role of these synthesis parameters in the formation of SiO 2 nanosupports and Au nanoparticles (NPs) was discovered. The RR-like SiO 2 nanosupports could only be formed in the systems within the range of 20–80 mol% of APTES content, at reaction temperatures above 60 °C, and with more than 0.72 mg of urea. The AuCl 4 − ions could be immobilized onto the aminopropyl-functionalized SiO 2 nanosupports through a coordination interaction. The immobilized ions were reduced by the aminopropyl groups at elevated temperatures. The APTES content and reaction temperature play an important role in controlling the particle size and its distribution of Au NPs. The catalytic activity of Au/SiO 2 NCs depends significantly on the APTES content. The RR-like Au/SiO 2 NCs with smaller immobilized Au NPs and higher specific surface area display higher catalytic activity towards hydrogenation of p -nitrophenol.
研究领域:
纳米技术
·
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）