POLYHEDRON
·
2018
·
IF 2.067
Ya-Nan Ren,Wei Xu,Zhen-Xiu Si,Lin-Xia Zhou,Yue-Qing Zheng
Two new uranyl compounds [NH 4 ][(UO 2 )(ipa) 1.5 ]·H 2 O 1 and [(UO 2 ) 2 ( μ 2 OH)( μ 3 OH)(ipa)(H 2 O)]·H 2 O 2 (H 2 ipa = isophthalic acid) have been synthesized under hydrothermal conditions and characterized by infrared spectra (IR), thermogravimetric analysis (TGA), elemental analyses and X-ray diffraction (XRD). Structural analysis reveals compound 1 exhibits two-dimensional (2D) framework through the bridging of ipa 2− anions, which was further construct to three-dimensional (3D) structure via π–π stacking interaction. Compound 2 presents a tetranuclear building block [(UO 2 ) 4 ( μ 2 OH) 2 ( μ 3 OH) 2 (H 2 O) 2 ] unit which was linked via μ 3 η 4 coordination mode ipa 2− anions to form one-dimensional (1D) chains structure. The fluorescence properties of the two compounds were investigated. The photocatalytic performance of compound 2 was also investigated and the results show that compound 2 exhibits good photocatalytic activity toward the degradation of tetracycline antibiotics under LEDs irradiation.
✓ 已验证
产品关联
DOI
高影响因子
Theranostics
·
2018
·
IF 8.537
Wei Li,Wanqing Hou,Xiaomeng Guo,Lihua Luo,Qingpo Li,Chunqi Zhu,Jie Yang,Jiang Zhu,Yongzhong Du,Jian You
Recently, nano-sized ultrasound contrast agents encapsulating drugs for cancer diagnosis and therapy have attracted much attention. However, the ultrasound signal of these agents is too weak to obtain an ideal ultrasound imaging effect. Furthermore, conventional ultrasound contrast agents with strong echo signal are not suitable for drug delivery against cancer because of their large size. To circumvent this problem, phase-transition ultrasound contrast agents are believed to be an excellent choice. Methods: Liposomes co-encapsulating doxorubicin (DOX), hollow gold nanospheres (HAuNS), and perfluorocarbon (PFC) were synthesized by film dispersion method. The morphology, particle size, and stability of these liposomes (DHPL) were investigated. The photothermal effect, drug release, particle size change, cytotoxicity, and ultrasound imaging were studied by using the near infrared (NIR) light. Furthermore, tumor accumulation of DHPL was observed by in vivo fluorescence imaging and the antitumor effect was verified in a 4T1 tumor model. Results: The nanosystem displayed a homogeneous size distribution (~200 nm) and an efficient light-to-heat conversion effect under 808 nm NIR laser irradiation. The nanometer size enabled considerable accumulation of DHPL in the tumor sites. The localized hyperthermia resulting from the photothermal effect of HAuNS could trigger the size transformation of DHPL followed by significant DOX release. Due to the gasification of PFC, a remarkably enhanced ultrasound signal was detected. DHPL also exhibited a prominent photothermally reinforced chemotherapeutic effect under the control of NIR light both in vitro and in vivo . Importantly, no systemic toxicity was observed by DHPL treatment. Conclusion: In this study, we fabricated multi-functional perfluorocarbon liposomes for ultrasound imaging-guided photothermal chemotherapy which have the potential to serve as a prospective cancer treatment approach.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Bio Materials
·
2018
·
IF 0
Lantao Liu,Nan Li,Meijun Chen,Hailin Yang,Qian Tang,Chengbin Gong
The phototoxicity of UV light limits the application of conventional azobenzene-based photoresponsive molecularly imprinted polymers in the biomedical field. This paper reports a tetra-ortho-methoxy-substituted azobenzene, N-(4-((4-amino-2,6-dimethoxyphenyl)diazenyl)-3,5-dimethoxyphenyl)methacrylamide (ADDDM), whose photoswitching is induced by all visible-light irradiation (440 nm for trans form to cis form and 630 nm for cis form to trans form) in N,N-dimethylformamide and tetrahydrofuran (1:9, v/v). Using ADDDM as the monomer, a visible-light-responsive surface molecularly imprinted polymer (VSMIP) on silica microspheres was fabricated for acyclovir (ACV). VSMIP showed a higher drug loading capacity, better specificity, faster drug release rate, and faster photoisomerization rate constant to ACV than the corresponding visible-light-responsive surface molecularly nonimprinted polymer (VSNIP). The selectivity of VSMIP to ACV and competing materials (ganciclovir and triacetylganciclovir) was examined by ultraviolet–visible spectroscopy, and the VSMIP showed excellent specificity of recognition toward ACV. The VSMIP can realize a visible-light-triggered (440/630 nm) release and uptake of ACV through chicken skin tissue (1 mm in thickness).
✓ 已验证
产品关联
DOI
PubMed
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2018
·Vol. 34
·期 4
·676-683
·
IF 1.248
Wu Peng,Zhou Dongfang,Huang Yubin,Li Jizhen
Photoactivated therapy is an exciting new method of cancer treatment. A new light-stimulus dual-drug responsive nanoparticles based on mesoporous silica nanoparticles(MSN) were developed to control cellular anticancer drug release. The prepared Curcumin(Cur)-loaded nanoparticles MSN-Pt-PEG@Cur[PEG=poly(ethylene glycol)] could be activated by photostimulation to generate reactive oxygen species(ROS) from Cur and Pt(II) from Pt(IV), respectively. Compared with free anti-cancer drugs’ chemotherapy and single photoactivated therapy, the prepared MSN-Pt-PEG@Cur displayed increased cytotoxicity. Therefore, the strategy of light-stimulus dual-drug responsive nanoparticles is a promising approach to photoactivated therapy.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2018
·Vol. 4
·期 1
·1800366
·
IF 4.622
Yuanyuan Yang,Mei Zhang,Dengfeng Li,Yajing Shen
As a kind of reptile that can move in a sophisticated environment by periodic changes in body shape, a snake's locomotion mode has inspired the design of several novel robots. Yet, most of those conventional robots are constructed by rigid components and powered by electricity. Herein, a novel snake-inspired soft robot by fabricating triple-layer reduced graphene oxide and polydopamine is reported. Such soft material is capable of bidirectional deformation while near-infrared (NIR) light is projected at different regions. It allows the robot to move continuously by periodically changing body shape on demand without external forces or torques. The designed robot can achieve two locomotion modes like a snake, i.e., concertina locomotion and serpentine locomotion modes, corresponding to external NIR light stimulation. It paves a new way for the fabrication and control of soft robot which can be applied to medical treatment, rescue operation, and so on in the future.
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Nan Ma,Ya Yang
Research of photovoltaic effect has been increased based on ferroelectric materials , generating a series of important discoveries. However, the conventional ferroelectric ceramics usually have low photocurrent values. How to increase the photocurrent of ceramics becomes an important issue to push forward the practical application of these devices. Here, we report the intrinsic properties about the temperature dependence of photocurrent and its relationship with the ferroelectric polarization. The photocurrent of BaTiO 3 ceramics strongly depends on the temperature, which can achieve an enhancement of 121.9～179.6% at low temperature (80–240 K) as compared with that at room temperature. The enhancement of photocurrent is associated with ferro-pyro-phototronic effect, evidencing by the enhanced ferroelectric polarization and the activation of shallow trap levels at low temperature, which can be used for detecting 405 nm light under low temperature. This research provides a potential approach to boost the photocurrent of ferroelectric ceramics and enable the development of a wide range of optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 37
·46686
·
IF 1.901
Safdar Ali,Farooq Khurum Shehzad,Inamullah Maitlo,Sultan Valiev,Ghulam Muhyodin,Jun Nie
Two types of cryogels were obtained using 2-hydroxyethyl acrylate (HEA) and 2-hydroxyethyl methacrylate (HEMA) by homogeneous mixing with poly(ethylene glycol) diacrylate (PEGDA) as crosslinker at subzero temperature followed by photopolymerization with two different light initiation sources (high-pressure Hg arc lamp and UV-LED).The solution was frozen unidirectionally at −60 °C before polymerization and finally photopolymerized at the same temperature. The cryogels were characterized using photo-DSC, UV–vis and Fourier transform infrared spectroscopy, and scanning electron microscopy techniques. The cryogels cured with an LED light showed a higher polymerization rate and better morphological characteristics than ones cured with a high-pressure Hg arc. The water intake ratio of HEA/PEGDA was higher than HEMA/PEGDA for both curing sources. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46686.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Tang Xiaosheng,Yang Jie,Li Shiqi,Chen Weiwei,Hu Zhiping,Qiu Jing
Novel CsPbBr3/CdS core/shell structure quantum dots (QDs) were successfully synthesized using a facile hot-injection method. The corresponding CsPbBr3/CdS QDs based light-emitting diodes (QLEDs) were further prepared, which demonstrated the maximum luminance of 354 cd/m2 and an external quantum efficiency (EQE) of 0.4% with the current efficiency (CE) of 0.3 cd/A. Moreover, the optoelectronic performance of the CsPbBr3/CdS QDs based QLEDs exhibited a comparable enhancement in contrast to the pure CsPbBr3 QDs based QLEDs. Hypothetically, the novel CsPbBr3/CdS structure QDs introduced one new route for advanced light emission applications of perovskite materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Jianbing Li,Xiufang Li,Hui Liu,Tao Ren,Ling Huang,Zhiwei Deng,Yanjing Yang,Shian Zhong
Glutathione (GSH)/light dual-responsive supramolecular drug carriers (abbreviated as CPAP) based on CD-PEG⊃Azo-PCL were fabricated for intracellular delivery of doxorubicin (DOX). The carriers were spherical with a diameter of 70–90 nm and exhibited GSH/light sensitivity. The GSH response attributed to disulfide bonds between PEG and β-cyclodextrin (β-CD), and the light response was achieved by a simple host-guest interaction between β-CD and azobenzene . DOX was encapsulated into the hydrophobic core of CPAP. The drug loaded CPAP ( [email protected] ) displayed the fastest drug release in the presence of GSH and light simultaneously. The cytotoxicities of CPAP and [email protected] were explored by SKOV3 cells and HEK293T cells. The results of cell experiments indicated that [email protected] could effectively inhibit cancer cells while had reduced toxicity to normal cells. We believe that [email protected] drug delivery system may present promising application for precisely controllable drug release.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Changlin Yu,Fanyun Chen,Zhen Liu,Kai Yang,Hongbing Ji,Dehao Li,Wenyu Xie,Shaoyu Li
A series of robust AgCl/WO 3 composite microrods (0.1–0.2 μ m) with different Ag/W molar ratios (0.25, 0.50, 0.75, 1.00, 1.25) were synthesized via hydrothermal-calcination process. The obtained samples were characterized by XRD , SEM, TEM , FT-IR, UV-vis DRS, PL , BET, Raman, transient TPRT and EIS . The photocatalytic test for organic dyes degradation showed that AgCl/WO 3 microrods possess much higher photocatalytic activities and stability than bare AgCl and WO 3 . With optimal AgCl/WO 3 molar ratio (0.75 ∼ 1), 2 ∼ 5 times increase in dye decomposition efficiency was obtained over AgCl/WO 3 microrods. The formation of intimate WO 3 /AgCl heterojuction (interface) largely enhanced the separation efficiency of photogenerated carriers. This investigation suggested that AgCl/WO 3 microrods could a promising photocatalyst for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Xiao-Bing Qian,Wen Peng,Yi-Biao Shao,Jian-Hua Huang
Nickel oxide/Au porous nanobelts were synthesized by hydrolysis of nickel (II) sulfate in the presence of Au nanoparticles under hydrothermal condition and subsequent calcination of Ni(OH) 2 /Au precursor in air. XPS measurement indicated the existence of both NiO and Ni 2 O 3 in nickel oxide/Au porous nanobelts. Heterojunctions between NiO and Ni 2 O 3 , as well as between NiO and Au, were observed in HRTEM images. Under visible light irradiation (λ > 420 nm), nickel oxide/Au porous nanobelts effectively produced hydrogen from water in the presence of Na 2 S and Na 2 SO 3 as sacrificial electron donor . The highest rate of hydrogen production over nickel oxide/Au porous nanobelt was 38.5 times higher than that of commercial NiO loaded with the same amount of Au. The photoluminescence spectra and transient photocurrent responses of nickel oxide/Au nanobelts reveal that the improved photocatalytic activity is due to the increased electron–hole separation at NiO Ni 2 O 3 and NiO Au interfaces. This work shows that low-cost nickel oxide could be used as visible light-active photocatalyst for hydrogen production.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Qixing Zhou,Shuanglong Ma,Sihui Zhan
Ordered mesoporous Ag/CeO 2 nanocomposites were prepared by combining nanocasting with photo-assisted reduction. The heterogeneous photoreactivity of the prepared samples was tested for inactivating Escherichia coli ( E. coli ). These mesoporous Ag/CeO 2 nanocomposites exhibited superior photocatalytic disinfection efficiency than mesoporous CeO 2 and bulk CeO 2 , respectively. Doping Ag species could extend the absorption range to visible light area and enhance the concentration of Ce 3+ ions and oxygen vacancies, which had significant influence on the surface properties of CeO 2 . Moreover, it is the first time to verify that created midgap states through doping Ag can significantly lower the threshold of incident photon energy and broaden the adsorption spectrum demonstrated by experimental studies and density functional theory (DFT) calculations. The enhanced disinfection mechanism was attributed to the fact that the novel mesoporous structure can promote the mass transfer process and the interfacial interaction between Ag species and CeO 2 and lead to reduced recombination of free charges, rapid separation and transportation of photogenerated electrons-holes. This work provides a new method to develop novel mesoporous plasmonic photocatlysts for disinfection using solar radiation.
✓ 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）