COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2018
·
IF 4.514
Wenbing Li,Yanju Liu,Jinsong Leng
In the current study, a novel polymer composite with excellent light-actuated two-way shape memory effect (2W-SME) was fabricated using poly (ethylene-co-vinyl acetate) (EVA) as matrix and p -aminodiphenylimide ( p -AP) as both light-absorber and heat source (EVA/ p -AP). Unlike traditional thermally-driven two-way reversible shape memory polymers, in our concept, the EVA/ p -AP featured remotely controlled and light-manipulatable reversible two-way shape memory behaviors. Utilizing the distinct light-responsive behavior of p -AP in the irradiation of 365 nm ultraviolet (UV) light, the EVA/ p -AP composite exhibited excellent light-actuated reversible 2W-SME by a light-manipulated procedure. The results from this study indicated that the composite material could have greatly potential applications in soft reversible drivers.
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Wenliang Wang,Lin Lin,Xiaojing Ma,Bo Wang,Sanrong Liu,Xinxin Yan,Shengran Li,Huayu Tian,Xifei Yu
Living drug delivery system has been proposed as new concept materials because it is able to communicate with biological system, sense subtle changes in body microenvironment caused by disease, and then make rapid response to cure in the early stage of disease. Herein, taking full advantage of the tumor hypoxia physiology and successive effects of photodynamic therapy (PDT), we designed a new living delivery system via combining the PDT and hypoxia-responsive chemotherapy, abbreviated as Ce6-PEG-Azo-PCL. Then, according to the fact that oxygen can be converted into reactive oxygen species during irradiation of the photosensitizer, tumor cells could be killed after the poly(ethylene glycol) (PEG) conjugated photosensitizer chlorine e6 was irradiated at the tumor site. What is more, the continuous consumption of oxygen could further amplify the hypoxia condition of tumor and trigger the disassembly of hypoxia-responsive azobenzene bridges at the tumor site to release loaded chemotherapeutics drugs doxorubicin. The ongoing collaboration with PDT and hypoxia-responsive chemotherapy provided an integrated therapeutic effect in vitro and in vivo to suppress tumor growth.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Feng Chen,Yazhi Zhu,Wei Li,Jintao Yang,Ping Fan,Zhengdong Fei,Mingqiang Zhong,Lingqian Chang,Tairong Kuang
Surfaces with stimuli-responsive properties have shown prominent applications in bioengineering, controlled drug release and biosensors in recent years. In this work, we report a surface-initiated reversible addition–fragmentation chain transfer polymerization method to graft azobenzene-containing diblock copolymer (azo-BCP) brushes onto an Indium Tin Oxide (ITO) glass surface. In this method, a sequential azo block serves as the outer layer that controls the closure or opening of the brushes, and the second block (PDMAEMA) acts as the inner layer that switches between swollen and collapsed chain states in response to different pH values and temperatures. Upon exposure to UV light, the ITO surface became more hydrophilic (>10° change of contact angles), and its friction coefficient (0.5–0.9) increased; this suggests a loose aggregation of the azo block. Additionally, the ion conductivity of the ITO surface can be influenced by the aggregation state of the azo-BCP brushes, thus leading to the transportation of light-triggered ions under various pH values and temperatures. This work provides a deep understanding of the surface properties of a sensitive hybrid material upon various stimuli for electrode purpose, thereby paving the way for the development of bioengineering and environmental sensory applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
·
IF 2.829
Meng-Jie Chang,Wen-Na Cui,Hua Wang,Jun Liu,Hui-Lu Li,Hui-Ling Du,Long-Gui Peng
A facile methodology for fabricating novel magnetic fibrous visible light photocatalysts CoFe 2 O 4 /BiOI (CFO/BiOI) is presented. The fabrication procedure involves production of electrospun CoFe 2 O 4 nanofibers and subsequent controllable decoration of BiOI nanoplates by both the successive ionic layer adsorption and reaction (SILAR) and solvothermal methods on CoFe 2 O 4 nanofiber surface. The BiOI nanoplates on the fiber surface obtained by two methods are highly crystallized with lamellae morphology. The resulting CFO/BiOI fibers exhibit strongly magnetic response to external magnetic field and can be quickly collected. All the CFO/BiOI fiber samples exhibit excellent visible light photocatalytic performance towards degrading RhB regardless of the preparation methods, in which h + and O 2− play the major roles examined by the trapping experiment. Above 80% RhB dyes can be degraded within 2 h after 3 cycles under visible light irradiation, suggesting the good reusability of the photocatalysts. This work demonstrates that the CFO/BiOI is characteristic with high visible light photocatalysis performance and magnetic response, hence is promising for photocatalysis.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2018
·
IF 3.849
Junlei Zhang,Zhen Ma
A novel Ag 3 VO 4 /BiOIO 3 heterojunction catalyst was prepared by loading Ag 3 VO 4 nanoparticles onto BiOIO 3 nanosheets via precipitation. Ag 3 VO 4 /BiOIO 3 exhibited obviously higher activity than Ag 3 VO 4 and BiOIO 3 in photocatalytic degradation of aqueous dyes and tetracycline hydrochloride under visible-light irradiation. The recyclability of the catalyst was confirmed by cycling experiments. Photogenerated holes (h + ) and superoxide radical anions ( · O 2 − ) were demonstrated to be the main active species. Ag 3 VO 4 /BiOIO 3 can facilitate the separation and transfer of photogenerated carriers more efficiently than Ag 3 VO 4 and BiOIO 3 . Possible photocatalytic mechanisms were proposed.
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高影响因子
Regional Studies in Marine Science
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2018
·
IF 1.152
Xiaocai Yu,Qiuyi Ji,Jian Zhang,Zhiwei Nie,Hang Yang
Photocatalyst composites were prepared by coprecipitation and characterized by XRD , SEM , and UV–Vis DRS methods. A substantially enhanced photocatalyst activity was observed in degradation of diesel pollutants in seawater, compared to zinc oxide without dopant. Photocatalytic degradation of diesel pollutants in seawater and the effects of factors on the composite’s photocatalytic effectiveness were studied under visible light and various conditions. This degradation in seawater was optimized using an orthogonal experimental plan. According to the results, diesel removal was 26.95% without any catalyst (losses only by evaporation) and the greatest effects occurred when the initial diesel concentration was 0.25 g/L, catalyst dose at 0.4 g/L, catalyst-doping ratio at 10%, pH at 9.0, H 2 O 2 at 6.0 mg/L, and illumination time at 2.5 h, in which case the diesel removal rate reached 93.89%. This study elaborated a means for making zinc oxide utilize visible light more efficiently and thus accelerate the practical application of photocatalytic technology in organic pollutant remediation.
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高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Feifei Sun,Yinyin Liu,Dongdong Wang,Zhaojie Wang,Haibo Mu,Feng Wang,Kan Ding,Jinyou Duan
Heparin (HP) has enormous potential for clinical medication applications owing to its anticoagulant activity. However, the strong anticoagulant capacity of HP also leads to some side effects. Herein, a photocaged derivative (HP-DMNB) of HP was synthesized for light control of its anticoagulant activity. The synthesized HP-DMNB was characterized by NMR and FTIR analysis, which confirmed the successful modification of HP with the photocleavable 4,5-dimethoxyl-2-nitrobenzyl (DMNB) groups. After the modification, the molecular weight of HP-DMNB (DS = 0.34%) changed from 61 to 71 kDa. Anticoagulant activity analysis showed that HP-DMNB had a reduced anticoagulant capacity compared with commercial HP, while its anticoagulant activity will regain after releasing the free carboxyl groups of HP under UV light. In addition, HP-DMNB and its UV irradiated products were observed to possess good biocompatibility through the MTT assays and live-dead assays with HaCaT cells, which may have impacts on the clinical medication applications of HP.
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Shenguang Ge,Linlin Liang,Feifei Lan,Yan Zhang,Yanhu Wang,Mei Yan,Jinghua Yu
The hybrids, N -aminobutyl- N -ethylisoluminol (ABEI), horseradish peroxidase (HRP) and cancer antigen 125 s antibody (Ab2) immobilized graphene oxide (GO), were prepared, which exhibited excellent chemiluminescence (CL) activity. The zinc oxide nanorods (ZNRs) grew on reduced graphene oxide (RGO) modified paper working electrode (ZNRs-RGO/PWE) via an in situ growth method. The deposition of CdS quantum dots (QDs) on ZNRs/RGO-PWE resulted in an enhanced excitation and photo-to-electric conversion efficiency. The ABEI-GO@HRP/Ab2CL system was employed as an internal excited light source. A photoelectrochemical (PEC) immunosensor based on CdS-sensitized ZNRs anchored RGO as the photoactive matrix and ABEI-GO@HRP/Ab2 as the CL labels was established for sensitive detection of cancer antigen 125 (CA 125). As a model, sandwich CA 125-antibody was taken as molecular reorganization elements on this sensor for the sensitive determination of CA 125 in the linear range from 5.0 × 10 −4 U/mL to 500 U/mL with a detection limit of 2.0 × 10 −4 U/mL. The specificity, reproducibility, and stability of this sensor were also investigated. This proposed method might be attractive for clinical and biomedical applications.
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高影响因子
MOLECULAR PHARMACEUTICS
·
2016
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IF 4.342
Ahu Yuan,Wei Huan,Xiang Liu,Zhicheng Zhang,Yifan Zhang,Jinhui Wu,Yiqiao Hu
Nanocarriers like PEGylated liposomes have achieved enhanced drug accumulation in tumors and reduced systemic side effects, but failed to actively release the carried drug into cancer cells. To obtain improved therapeutic efficacy, we designed a novel liposome that was inserted by the amphiphilic agent PEG-IR780-C13 (PIC-Lipo) and encapsulated therapeutic agent doxorubicin (DOX), termed as DOX@PIC-Lipo. Upon NIR laser irradiation, the novel liposomes could generate hyperthermia and facilitate the release of encapsulated DOX from PIC-Lipo, which were confirmed by photothermal curves and the DOX release assay in vitro, respectively. In addition, the enhanced DOX release and sufficient hyperthermia have performed synergetic therapeutic efficacy both in vitro and in vivo. Therefore, DOX@PIC-Lipo might provide an active strategy to release the loaded drug for synergetic chemo–photothermal combined therapy.
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PubMed
高影响因子
ANALYTICAL SCIENCES
·
2016
·Vol. 32
·期 7
·757-762
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IF 1.174
Wang Chengke,Chen Dan,Wang Qingqing,Wang Qiuxia
In this work, an aptasensor-based resonance light-scattering (RLS) method was developed for the sensitive and selective detection of acetamiprid. The ABA (acetamiprid binding aptamer)-stabilized gold nanoparticles (ABA-AuNPs) were used as a probe. Highly specific single-strand DNA (ssDNA, i.e , aptamers) that bind to acetamiprid with high affinity were employed to discriminate other pesticides, such as edifenphos, kanamycin, metribuzin et. al. The sensing approach is based on a specific interaction between acetamiprid and ABA. Aggregation of AuNPs was specifically induced by the desorption of the ABA from the surface of AuNPs, which caused the RLS signal intensity to be enhanced at 700 nm. The alteration of AuNPs’ aggregation has been successfully optimized by controlling several conditions. Under the optimal conditions, the RLS intensity changes ( I/I0 ) of AuNPs were linearly correlated with the acetamiprid concentration in the range of 0–100 nM. The detection limit is 1.2 nM (3σ). This method had also been used for acetamiprid detection in lake water samples.
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PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 87
·84493-84499
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IF 3.289
Yi-Biao Shao,Long-Hao Wang,Jian-Hua Huang
ZnS/CuS nanotubes are synthesized by using ZnO nanorods as the precursor, followed by sulfuration and subsequent cation exchange reaction. The deposition of CuS on ZnS nanotubes are confirmed by EDS analysis, XPS and UV-Vis diffuse reflectance spectroscopy. HRTEM images clearly display the heterojunctions between ZnS and CuS nanoparticles. ZnS/CuS nanotubes exhibit good photocatalytic activity for H2 generation without cocatalysts under visible light irradiation (λ > 420 nm). The H2 generation rate depends on the CuS content in the ZnS/CuS nanotubes. The highest H2 generation rate is 85 times higher than that of copper-free ZnS tubes. The highly improved performance for H2 evolution is supposed to originate from the formation of heterojunctions between ZnS and CuS nanoparticles.
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高影响因子
SOFT MATERIALS
·
2017
·
IF 1.101
Lingli Ni,Mei Wu,Feng Chen,Irena Deroche,Abraham Chemtob
A visible light-mediated sol–gel process can promote the ordering of hexylene, octylene, and decylene-bridged polysilsesquioxane (SQ) with very simple organosilane building blocks having only a short alkylene bridging group: (CH3O)3SiCnH2nSi(OCH3)3 (n = 6, 8, 10). Photocondensation and self-assembly of films are promoted through exposure to a light-emitting diode (LED; 405 nm). The solvent-free synthesis involves very low light intensity (0.1 mW/cm2) and a minimum amount of photoacid generator (PAG; 0.5 wt%) acting as a photocatalyst. X-ray diffraction (XRD) and scanning electron microscopy (SEM) prove the high level of organization, while real-time Fourier transform infrared spectroscopy shows conformational ordering of alkylene chains throughout irradiation. Molecular modeling reveals a multilayer structure based on the stacking of a single polysiloxane chain, with organic groups attached to adjacent Si atoms showing up and down orientation.
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危险品化学品经营许可证（带存储）