SENSORS AND ACTUATORS B-CHEMICAL
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2016
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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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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2016
·Vol. 100
·期 1
·333-342
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IF 2.787
Linhui Yu,Yangming Lin,Jing Huang,Sen Lin,Danzhen Li
Carbon-doped TiO 2 nanomaterials have been successfully synthesized via an effective two-step procedure involving hydrothermal method and followed by a low-temperature calcination treatment process, through which a controllable amount of carbonate-like species could be incorporated into TiO 2 . First-principles calculations suggest the TiO 2 doped with carbon in form of carbonate-like species can effectively extend the adsorption of the material from ultraviolet region to visible light. And it is experimentally found that carbon-doped TiO 2 nanomaterials exhibit much higher photocatalytic activity than reference P25 and TiO 2− x N x catalysts toward the liquid-phase degradation of organic pollutants under visible light (420 nm < λ < 800 nm) irradiation. The presence of synergic effect between carbonate-like doping and anatase TiO 2 is believed to play an essential role in affecting the photocatalytic reactivity, and the response to the visible light is ascribed to the narrowed band gap energy controlled by carbon doping. Moreover, the roles of active species in the photocatalytic process are compared using different types of active species scavengers. Meanwhile, the degradation mechanism of the photocatalysis is proposed. It is hoped that our work could provide valuable information on the design of carbonate-like doped semiconductor with more excellent properties and set the foundation for the further industrial application.
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ANALYTICAL SCIENCES
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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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SOFT MATERIALS
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2017
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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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RSC Advances
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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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MOLECULAR PHARMACEUTICS
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2016
·
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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高影响因子
LANGMUIR
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2015
·
IF 4.457
Ruidong Cheng,Min Tian,Sujuan Sun,Chenghui Liu,Youpeng Wang,Zhaotie Liu,Zhongwen Liu,Jinqiang Jiang
The amphiphilic random copolymer of P(NVP-co-NHPSS) with photocleavable N–O sulfonate side groups has been prepared to investigate the light-triggered disruption of copolymer micelles. Methods of absorption and emission spectra, solution transmittance, dynamic light scattering (DLS), and transmission electron microscopy (TEM) were applied. It was found that P(NVP-co-NHPSS) could form polymeric nanoaggregates in aqueous solution. And the photocleavage of the N–O bond within copolymer micelles upon 365 nm UV light could be conveniently controlled by changing the irradiation intensity, leading to the disruption of copolymer micelles and the photocontrolled release of Nile red encapsulation. And by encapsulating NaLuF4:Gd/Yb/Tm UCNPs inside copolymer micelles, the response of the photocleavable N–O bond to the 980 nm laser was much weaker than the response to 365 nm light; however, the photocontrolled release of Nile red could still be effectively triggered by the NIR light of the 980 nm laser.
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Acta Biomaterialia
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2015
·
IF 6.025
Kui Cheng,Yu Sun,Hongping Wan,Xiaozhao Wang,Wenjian Weng,Jun Lin,Huiming Wang
Anatase TiO 2 nanodot films have been found to be able to release cells under light illumination with excellent efficiency and safety. In the present study, we investigated the effects of rutile contents in TiO 2 nanodot films on such light induced cell detachment behavior. The results showed that TiO 2 nanodot films with different contents of rutile phase have been prepared successfully. The content of rutile phase increased with the increase in calcination temperature. All films possessed good cell adhesion but there was a decrease in cell proliferation with the increasing content of rutile phase. Single cell detachment assay showed that the films with high rutile contents (calcined at 900 °C and 1100 °C) showed better cell detachment performance. That was ascribed to the changes of the secondary structure of extracellular proteins adsorbed on the nanodot surface after ultraviolet (365 nm, UV365) illumination. In addition, cell sheets detached through UV365 illumination maintained high activity and could be further used in tissue engineering. The present work showed that the existence of rutile phase is helpful in cell detachment behavior and it could be utilized to optimize light-induced cell detachment behavior. Statement of Significance This work discovers that the presence of rutile phase in TiO 2 nanodot films could improve the light-induced cell detachment behavior, although rutile phase is inferior to anatase phase on light induced superhydrophilicity. That strongly supported that the behaviors of adsorbed proteins are crucial in acquiring cell sheet with light illumination. In fact, the state and behavior of adsorbed protein greatly affect the interaction between biomaterials and living cells. Therefore, we consider this work is not only important in harvesting cells or cell sheets through light illumination, but also helpful in further understanding of interaction between biomaterials and cells.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2013
·Vol. 97
·期 1
·267-274
·
IF 2.107
Jinxiu Wang,Xue Yang,Jing Chen,Jiangjun Xian,Sugang Meng,Yi Zheng,Yu Shao,Danzhen Li
In this study, pure Ag 4 V 2 O 7 was synthesized via hydrothermal method without surfactant at different temperatures (100°C, 120°C, and 140°C) and pH values (4 and 5) for the first time. Moreover, Ag 4 V 2 O 7 nanoparticles with homogeneous size distribution about 200–300 nm can be obtained by adding polyvinylpyrrolidone to the synthesis system. Effects of hydrothermal synthesis conditions on photophysical properties and photocatalytic activity of Ag 4 V 2 O 7 were investigated systematically. Ag 4 V 2 O 7 sample prepared at 120°C and pH = 4 had the optimal photocatalytic activity among these samples, which almost completely degraded 10 ppm Rhodamine B within 3 h under visible light irradiation (420 nm < λ < 800 nm). The degradation products were measured by liquid chromatography–mass spectroscopy. The active species involved in the degradation process were analyzed by means of adding active species scavengers, electron spin resonance techniques, and photoelectrochemical experiments. A possible mechanism for photocatalytic degradation of organic pollutants on Ag 4 V 2 O 7 photocatalyst was proposed and discussed preliminarily.
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ACS Nano
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2015
·
IF 12.881
Zhen Liu,Xianjun Liu,Yingda Du,Jinsong Ren,Xiaogang Qu
As an efficient route to control pet overpopulation and develop neutered experimental animals, male sterilization via surgical techniques, chemical injections, and antifertility vaccines has brought particular attention recently. However, these traditional ways usually induce long-term adverse reactions, immune suppression, and serious infection and pain. To overcome the above limitations, we developed a platform in the present study by using plasmonic copper sulfide nanocrystals (Cu2–xS NCs) as intelligent light-driven sterilants with ideal outcomes. Upon NIR laser irradiation, these well-prepared Cu2–xS NCs can possess NIR-induced hyperthermia and generate high levels of reactive oxygen species (ROS). Due to the cooperation of photothermal and photodynamic effects, these nanocrystals exhibited NIR-mediated toxicity toward Sertoli cells both in vitro and in vivo in a mild manner. We attribute the potential mechanism of cellular injury to the apoptosis-related death and denaturation of protein in the testicles. Furthermore, the possible metabolism route and long-term toxicity of these nanocrystals after testicular injection indicate their high biocompatibility. Taking together, our study on the NIR-induced toxicity of Cu2–xS NCs provides keen insights for the usage of plasmonic nanomaterials in biomedicine.
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Nanomaterials and Nanotechnology
·
2015
·
IF 0.857
Linfan Cui,Tifeng Jiao,Qingrui Zhang,Jingxin Zhou,Qiuming Peng
In this study, highly efficient silver halide (AgX)-based photocatalysts were successfully fabricated using a facile and template-free direct-precipitation method. AgX nanoparticles, which included silver chloride (AgCl), silver bromide (AgBr) and silver iodide (AgI), were synthesized using different potassium halides and silver acetate as reactive sources. The size distribution of the AgX nanoparticles was determined by the reaction time and ratio of the reagents, which were monitored by UV-vis spectra. The as-prepared AgX nanoparticles exhibited different photocatalytic properties. This shows the differences for the photodegradation of methyl orange and Congo red dyes. In addition, the AgCl nanoparticle-based photocatalyst exhibited the best photocatalytic property among all three types of AgX nanoparticles that are discussed in this study. Therefore, it is a good candidate for removing organic pollutants.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·
IF 3.5
Hu Quanli,Su Wang,Luo Hanqiong,Wang Yin,Liu Jinghai
The electrospun light rare earth orthochromites RCrO 3 (R = La, Pr, Nd, Sm, Eu) nanofibers have perovskite-type orthorhombic structures. Raman spectra proved the typical vibration modes of the rotation, bending, and stretching of the CrO 6 octahedra in RCrO 3 nanofibers. The rare earth element with large ion radius, low electronegativity, and remarkable affinity for oxygen, and the rich redox reaction of Cr endow RCrO 3 a potential energy storage material for supercapacitors. It is highly significant to investigate the electrochemical properties of RCrO 3 . The electrochemical properties of the RCrO 3 nanofibers as supercapacitor electrodes were elucidated. At 0.5 A/g, the LaCrO 3 , PrCrO 3 , NdCrO 3 , SmCrO 3 , and EuCrO 3 nanofibers exhibited the specific capacitance values of 267.8, 132.8, 157.6, 170.5, and 170.4 F/g, respectively. First-principles density functional theory method was used to clarify the electronic structure and total density of states of the RCrO 3 nanofibers. This study provides a rational design and fabrication method to pseudocapacitor electrodes.
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