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https://www.readbyqxmd.com/read/28735199/one-pot-synthesis-of-bismuth-silicate-heterostructures-with-tunable-morphology-and-excellent-visible-light-photodegradation-performances
#1
Kun-Le Jia, Jin Qu, Shu-Meng Hao, Fei An, Ya-Qiong Jing, Zhong-Zhen Yu
Construction of a heterostructure to prolong the life of electron-hole pairs is a very important approach to endow it with excellent photodegradation performances. Particularly, one-pot synthesis of heterostructures with the same component but different crystal structures to form a proper band gap is still challenging. Herein, bismuth silicate (BSO) heterostructures are synthesized using a one-pot hydrothermal approach without adding any other inorganic components. The crystal phase, morphology, surface state, and photochemical properties of the BSO materials are precisely tuned to fabricate two kinds of bismuth silicate heterostructures: rod-like Bi2SiO5/Bi12SiO20 and flower-like Bi2SiO5/Bi4Si3O12 heterostructures...
July 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28735195/modified-carbon-fiber-magnetic-graphene-epoxy-composites-with-synergistic-effect-for-electromagnetic-interference-shielding-over-broad-frequency-band
#2
Jiaming Wu, Zhengmao Ye, Heyi Ge, Juan Chen, Wenxiu Liu, Zhifang Liu
The study on electromagnetic interference (EMI) shielding materials is a long-standing project in civil and military areas. In this work, a novel kind of shielding material was fabricated and the shielding effectiveness (SE) over broad frequency was investigated. The epoxy (EP) resin was reinforced by reduced graphene oxide coated carbon fiber (rGO-CF, GCF) and Fe3O4 nanoparticles deposited rGO nanohybrids (magnetic graphene, MG). With only 0.5wt% of GCF and 9wt% of MG, the GCF/MG3/EP exhibited excellent SE (>30dB over 8...
July 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28735194/deposition-precipitation-preparation-of-ag-ag3po4-wo3-nanocomposites-for-efficient-visible-light-degradation-of-rhodamine-b-under-strongly-acidic-alkaline-conditions
#3
Qingyong Li, Fulei Wang, Yuxiang Hua, Yuting Luo, Xiaoheng Liu, Guorong Duan, Xujie Yang
A series of novel visible-light-driven Ag/Ag3PO4/WO3 (AAPW) Z-scheme heterostructures were fabricated using a facile deposition-precipitation method followed by photo-reduction without adding any surfactant. To explore more deeply about the photocatalytic activity of AAPW nanocomposites under neutral and strongly acidic/alkaline conditions, we investigated their photocatalytic rhodamine B (RhB) efficiency at different pH value that was controlled by adding HNO3 or NaOH aqueous solution. It was found that as-prepared AAPW photocatalysts showed enhanced photocatalytic RhB efficiency under neutral and even strongly acidic/alkaline environment...
July 6, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28735193/fabrication-of-in2s3-zn2geo4-composite-photocatalyst-for-degradation-of-acetaminophen-under-visible-light
#4
Tao Yan, Tingting Wu, Yaru Zhang, Meng Sun, Xiaodong Wang, Qin Wei, Bin Du
A novel indium trisulfide/zinc germinate (In2S3/Zn2GeO4) composite was developed via a co-precipitation hydrothermal method. The as-prepared composite was characterized in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-vis diffuse reflectance spectroscopy (DRS). Zn2GeO4 nanorods work as the main photocatalyst while In2S3 nanoparticles deposited on them acts as the photosensitizer. The resulting In2S3/Zn2GeO4 heterogeneous photocatalyst not only has enhanced visible light absorption, but also improved photo-generated charge transfer efficiency with remarkably high efficiency in decomposing acetaminophen (APAP)...
June 23, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28735192/nozzle-jet-printed-flexible-field-effect-transistor-biosensor-for-high-performance-glucose-detection
#5
Kiesar Sideeq Bhat, Rafiq Ahmad, Jin-Young Yoo, Yoon-Bong Hahn
Printable electronics is a subject of great interest for low-cost, facile and environmentally-friendly large scale device production. But, it still remains challenging for printable biosensor development. Herein, we present the fabrication of nozzle-jet printed flexible field-effect transistor (FET) glucose biosensor. The silver source-drain electrodes and ZnO seed layers were printed on flexible substrate by nozzle-jet printer followed by ZnO nanorods (ZnO NRs) synthesis and glucose oxidase (GOx) immobilization...
July 14, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28735184/synthesis-of-magnetic-graphene-oxide-grafted-polymaleicamide-dendrimer-nanohybrids-for-adsorption-of-pb-ii-in-aqueous-solution
#6
Ying-Xia Ma, Ya-Lan Kou, Dan Xing, Peng-Sheng Jin, Wen-Jie Shao, Xin Li, Xue-Yan Du, Pei-Qing La
In this paper, using maleic anhydride and ethylenediamine as functional monomers, graphene oxide (GO) loaded magnetic Fe3O4 nanoparticles modified by (3-Aminopropyl) triethoxysilane as support, magnetic graphene oxide grafted polymaleicamide dendrimer (GO/Fe3O4-g-PMAAM) nanohybrids were fabricated by divergent method and magnetic separation technology. The obtained samples were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, elementary analyzer and vibrating sample magnetometer...
July 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28735175/cancer-cell-membrane-coated-biomimetic-platform-for-tumor-targeted-photodynamic-therapy-and-hypoxia-amplified-bioreductive-therapy
#7
Shi-Ying Li, Hong Cheng, Wen-Xiu Qiu, Lu Zhang, Shuang-Shuang Wan, Jing-Yue Zeng, Xian-Zheng Zhang
Modulating tumor microenvironment to amplify the therapeutic efficiency would be a novel strategy for effective cancer treatment. In this work, based on the TPZ-loaded porphyrinic metal organic framework PCN-224 (PCN stands for porous coordination network), a cancer cell membrane-coated nanoplatform (TPZ@PCN@Mem) was fabricated for tumor targeted PDT and the successively resulting hypoxia-amplified bioreductive therapy. After administration, TPZ@PCN@Mem exhibited the selective accumulation and long-term retention at tumor tissue due to the immune escape and homologous targeting endowed by the cancer membrane coating...
July 18, 2017: Biomaterials
https://www.readbyqxmd.com/read/28735044/sensing-platform-for-neuron-specific-enolase-based-on-molecularly-imprinted-polymerized-ionic-liquids-in-between-gold-nanoarrays
#8
Xing Wang, Yanying Wang, Xiaoxue Ye, Tsunghsueh Wu, Hongping Deng, Peng Wu, Chunya Li
A molecularly imprinted electrochemical sensor for neuron specific enolase (NSE) was developed by electrochemical polymerizing ionic liquid, which was functionalized with pyrrole moiety, in between gold nanoarrays. A well-defined 3D structured gold nanoarray was fabricated on a glassy carbon electrode (GCE) surface by using template-assisted electrochemical deposition technique. 1-(3-mercaptopropyl)-3-vinyl-imidazolium tetrafluoroborate was self-assembled onto the surface of gold nanoarrays to produce active sites for anchoring the molecularly imprinted film...
July 14, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28735028/protein-only-antimicrobial-peptide-containing-recombinant-nanoparticles-with-inherent-built-in-antibacterial-activity
#9
Naroa Serna, Laura Sánchez-García, Alejandro Sánchez-Chardi, Ugutz Unzueta, Mónica Roldán, Ramón Mangues, Esther Vázquez, Antonio Villaverde
The emergence of bacterial antibiotic resistances is a serious concern in human and animal health. In this context, naturally occurring cationic antimicrobial peptides (AMPs) might play a main role in a next generation of drugs against bacterial infections. Taking an innovative approach to design self-organizing functional proteins, we have generated here protein-only nanoparticles with intrinsic AMP microbicide activity. Using a recombinant version of the GWH1 antimicrobial peptide as building block, these materials show a wide antibacterial activity spectrum in absence of detectable toxicity on mammalian cells...
July 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28734996/the-design-of-novel-visible-light-driven-ag-cdo-as-smart-nanocomposite-for-photodegradation-of-different-dye-contaminants
#10
K Saravanakumar, V Muthuraj, M Jeyaraj
In this paper, we report a novel visible light driven Ag/CdO photocatalyst, fabricated for the first time via one pot hydrothermal method and further applied for the photodegradation of two important exemplar water contaminants, Malachite green and Acid Orange 7. The microstructure, composition and optical properties of Ag/CdO nanocomposites were thoroughly investigated by various techniques. Scanning electron microscopy clearly shows that Ag NPs were strongly embedded between the CdO nanoparticles. Among the series of synthesized Ag/CdO nanocomposites, (5%) Ag/CdO nanocomposite possesses enhanced photocatalytic activity...
July 17, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28734664/ph-responsive-biodegradable-nanogels-for-sustained-release-of-bleomycin
#11
Prashant Sahu, Sushil K Kashaw, Varun Kushwah, Samaresh Sau, Sanyog Jain, Arun K Iyer
Site specific drug delivery with desired therapeutic effect still remains challenging task due to suboptimal release, tissue toxicity, low selectivity and meager therapeutic efficacy in skin cancers. The aim of the current study was to fabricate pH responsive, self-assembled, chemically cross-linked biodegradable chitosan nanogel loaded with bleomycin to target the dermal area of the skin. The nanogel synthesized by ion gelation technique and was characterized for drug loading, swelling and thermal stability followed by in vitro analysis...
June 27, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28734609/reinforcements-in-avian-wing-bones-experiments-analysis-and-modeling
#12
E Novitskaya, C J Ruestes, M M Porter, V A Lubarda, M A Meyers, J McKittrick
Almost all species of modern birds are capable of flight; the mechanical competency of their wings and the rigidity of their skeletal system evolved to enable this outstanding feat. One of the most interesting examples of structural adaptation in birds is the internal structure of their wing bones. In flying birds, bones need to be sufficiently strong and stiff to withstand forces during takeoff, flight, and landing, with a minimum of weight. The cross-sectional morphology and presence of reinforcing structures (struts and ridges) found within bird wing bones vary from species to species, depending on how the wings are utilized...
July 14, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28734607/impact-of-instrument-and-column-parameters-on-high-throughput-liquid-chromatography-performance
#13
Martin Gilar, Thomas S McDonald, Fabrice Gritti
The speed and separation performance of high-throughput liquid chromatography (HT LC) was investigated. We evaluated the contributions of various experimental parameters to the total analysis cycle time, including column length (column void time), gradient delay, flow rate, auto-sampler (A/S) speed, and software related delays. The best case injection-to-injection cycle time of 22s was achieved using 12s gradient time and 2.1×20mm columns packed with 1.7μm C18 particles. The total 22s analytical duty cycle consisted of 2...
July 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28734367/a-solid-contact-potassium-selective-electrode-with-moo2-microspheres-as-ion-to-electron-transducer
#14
Xianzhong Zeng, Wei Qin
A solid-contact ion-selective electrode (SC-ISE) for potassium with MoO2 microspheres as ion-to-electron transducer is described. MoO2 microsphers can be synthesized via the reduction of MoO3 nanobelts in an isopropanol solvent with a mild process, and the obtained MoO2 microspheres have been characterized by X-ray diffraction and field-emission scanning electron microscopy. With the application of MoO2 microspheres, the newly fabricated SC-ISE for K(+) exhibits a stable and rapid potential response. A near Nernstian slope of 55 mV/decade to potassium activities in the range of 10(-5) ‒ 10(-3) M is found and the detection limit is 10(-5...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734354/determination-of-aqueous-antibiotic-solutions-using-sers-nanogratings
#15
Koh Yiin Hong, Carlos Diego Lima de Albuquerque, Ronei J Poppi, Alexandre G Brolo
The emergence of antibiotics and their active metabolites in aquatic ecosystem has motivated the development of sensitive and reliable sensors to monitor traces of antibiotics and metabolites in drinking water sources (i.e. surface water). The surface enhanced Raman scattering (SERS) technique, which is widely recognized as a high sensitivity method for molecular vibrational detection, is potentially a powerful tool for trace environmental contamination analysis. The main goal of this work is to demonstrate pharmaceutical and metabolite multiplexing detection using the SERS approach...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734256/3d-porous-polyurethanes-featured-by-different-mechanical-properties-characterization-and-interaction-with-skeletal-muscle-cells
#16
Lorenzo Vannozzi, Leonardo Ricotti, Tommaso Santaniello, Tercio Terencio, Reinier Oropesa-Nunez, Claudio Canale, Francesca Borghi, Arianna Menciassi, Cristina Lenardi, Irini Gerges
The fabrication of biomaterials for interaction with muscle cells has attracted significant interest in the last decades. However, 3D porous scaffolds featured by a relatively low stiffness (almost matching the natural muscle one) and highly stable in response to cyclic loadings are not available at present, in this context. This work describes 3D polyurethane-based porous scaffolds featured by different mechanical properties. Biomaterial stiffness was finely tuned by varying the cross-linking degree of the starting foam...
July 14, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28734150/growing-platinum-ruthenium-tin-ternary-alloy-nanoparticles-on-reduced-graphene-oxide-for-strong-ligand-effect-toward-enhanced-ethanol-oxidation-reaction
#17
Qing Qing Xia, Lian Ying Zhang, Zhi Liang Zhao, Chang Ming Li
Uniform Pt1Ru0.5Sn0.5 ternary alloy nanoparticles are in situ deposited on reduced graphene oxide (Pt1Ru0.5Sn0.5-RGO) through its functional groups and defects as nucleation sites to greatly electrocatalyze ethanol oxidation reaction for much higher mass current densities, larger apparent specific current densities and better stability than commercial Pt-C catalyst (Pt-C(commer)). Mechanistic studies indicate that the excellent electrocatalytic activity and anti-poisoning are resulted from a strong ligand effect of the ternary alloy components, in which the charge transfer is boosted while decreasing the density of states close to the Fermi level of Pt to reduce bond energy between Pt and CO-like adsorbates for greatly improved anti-poisoning ability...
June 30, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28733683/radiation-loss-of-planar-surface-plasmon-polaritons-transmission-lines-at-microwave-frequencies
#18
Zhixia Xu, Shunli Li, Xiaoxing Yin, Hongxin Zhao, Leilei Liu
Radiation loss of a typical spoof surface plasmon polaritons (SSPPs) transmission line (TL) is investigated in this paper. A 325 mm-long SSPPs TL is designed and fabricated. Simulated results show that radiation loss contributes more to transmission loss than dielectric loss and conductor loss from 2 GHz to 10 GHz. Radiation loss of the SSPPs TL could be divided into two parts, one is caused by the input mode converter, and the other is caused by the corrugated metallic strip. This paper explains mechanisms of radiation loss from different parts, designs a loaded SSPPs TL with a series of resistors to absorb electromagnetic energy on corrugated metallic strip, and then discriminates radiation loss from the input mode converter, proposes the concept of average radiation length (ARL) to evaluate radiation loss from SSPPs of finite length, and concludes that radiation loss is mainly caused by corrugated structure of finite length at low frequency band and by the input mode converter at high frequency band...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733659/thickness-dependence-of-anomalous-nernst-coefficient-and-longitudinal-spin-seebeck-effect-in-ferromagnetic-nixfe100-x-films
#19
Harsha Kannan, Xin Fan, Halise Celik, Xiufeng Han, John Q Xiao
Spin Seebeck effect (SSE) measured for metallic ferromagnetic thin films in commonly used longitudinal configuration contains the contribution from anomalous Nernst effect (ANE). The ANE is considered to arise from the bulk of the ferromagnet (FM) and the proximity-induced FM boundary layer. We fabricate a FM alloy with zero Nernst coefficient to mitigate the ANE contamination of SSE and insert a thin layer of Cu to separate the heavy metal (HM) from the FM to avoid the proximity contribution. These modifications to the experiment should permit complete isolation of SSE from ANE in the longitudinal configuration...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733653/synthesis-and-thermochromic-property-studies-on-w-doped-vo2-films-fabricated-by-sol-gel-method
#20
Guoping Pan, Jinhua Yin, Keli Ji, Xiang Li, Xingwang Cheng, Haibo Jin, Jiping Liu
Tungsten-doped VO2 thin films have been synthesized by a modified sol-gel process and followed by a post annealing. Vanadium pentoxide and tungstic acid as raw materials with the addition of hydrogen peroxide, concentrated hydrochloric acid (catalyst) and oxalic acid used as reducing agent were reacted in isobutanol. Finally, the uniform sol of vanadyl oxalate in isobutanol solvent was obtained as precursor. Detailed study suggested that W doped in VO2 introduces additional electron carriers and induces the formation of V(3+)...
July 21, 2017: Scientific Reports
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