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https://www.readbyqxmd.com/read/28528133/chemical-synthesis-of-flower-like-hybrid-cu-oh-2-cuo-electrode-application-of-polyvinyl-alcohol-and-triton-x-100-to-enhance-supercapacitor-performance
#1
S K Shinde, V J Fulari, D-Y Kim, N C Maile, R R Koli, H D Dhaygude, G S Ghodake
In this research article, we report hybrid nanomaterials of copper hydroxide/copper oxide (Cu(OH)2/CuO). A thin films were prepared by using a facile and cost-effective successive ionic layer adsorption and reaction (SILAR) method. As-synthesized and hybrid Cu(OH)2/CuO with two different surfactants polyvinyl alcohol (PVA) and triton-X 100 (TRX-100) was prepared having distinct morphological, structural, and supercapacitor properties. The surface of the thin film samples were examined by scanning electron microscopy (SEM)...
May 9, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28527338/facile-mass-production-of-nanoporous-sno2-nanosheets-as-anode-materials-for-high-performance-lithium-ion-batteries
#2
Wenli Wei, Pengcheng Du, Dong Liu, Hongxing Wang, Peng Liu
Facile one-step ultrasonic-assisted chemical precipitation strategy has been developed for the mass production of SnO2 nanomaterials with different morphologies. As anode material for lithium-ion batteries, the nanoporous SnO2 nanosheets exhibited an extremely high initial specific capacity of 2231mAh/g in comparison with 1242mAh/g of the SnO2 microcrystals and 1244mAh/g of the nanoporous SnO2 nanoflowers. Meanwhile the nanoporous SnO2 nanosheet electrode displayed a specific capacity of 688mAh/g after 60 cycles at 0...
May 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28527321/short-term-exposure-to-gold-nanoparticle-suspension-impairs-swimming-behavior-in-a-widespread-calanoid-copepod
#3
François-Gaël Michalec, Markus Holzner, Alexandre Barras, Anne-Sophie Lacoste, Loïc Brunet, Jae-Seong Lee, Christian Slomianny, Rabah Boukherroub, Sami Souissi
Calanoid copepods play an important role in the functioning of marine and brackish ecosystems. Information is scarce on the behavioral toxicity of engineered nanoparticles to these abundant planktonic organisms. We assessed the effects of short-term exposure to nonfunctionalized gold nanoparticles on the swimming behavior of the widespread estuarine copepod Eurytemora affinis. By means of three-dimensional particle tracking velocimetry, we reconstructed the trajectories of males, ovigerous and non-ovigerous females...
May 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28525935/design-synthesis-and-characterization-of-doped-titanium-oxide-nanomaterials-with-environmental-and-angiogenic-applications
#4
Susheel Kumar Nethi, Neeraja Aparna Anand P, Beatriz Rico-Oller, Antonio Rodríguez-Diéguez, Santiago Gómez-Ruiz, Chitta Ranjan Patra
Since the last decade, the metal composite nanostructures have evolved as promising candidates in regard to their wide applications in the fields of science and engineering. Recently, several investigators identified the titanium based nanomaterials as excellent agents for multifunctional environmental and biomedical applications. In this perspective, we have developed a series of zinc-doped (2 and 5%) titanium oxide-based nanomaterials using various reaction conditions and calcination temperatures (TZ1-TZ3: calcined at 500°C, TZ4-TZ6: calcined at 600°C and TZ7-TZ9: calcined at 700°C)...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28525855/surface-design-of-magnetic-nanoparticles-for-stimuli-responsive-cancer-imaging-and-therapy
#5
REVIEW
Taegyu Kang, Fangyuan Li, Seungmin Baik, Wei Shao, Daishun Ling, Taeghwan Hyeon
Magnetic nanoparticles (MNPs) have been extensively studied for their potential applications to cancer diagnosis and treatment. However, various obstacles limit the use of nanoparticles for delivery in the tumor microenvironment. As a viable solution to such obstacles, advances in nanoparticle surface engineering augmented by a profound understanding of cancer physiology present new opportunities for MNP-based imaging and therapeutic agents. Stimuli-responsive ligands, rationally designed to interact with various physicochemical aspects, can improve the performance of MNPs in cancer-targeted imaging and therapy...
May 8, 2017: Biomaterials
https://www.readbyqxmd.com/read/28525393/novel-nb3o7f-ws2-hybrid-nanomaterials-with-enhanced-optical-absorption-and-photocatalytic-activity
#6
Fei Huang, Zhen Li, Aihua Yan, Hui Zhao, Hao Feng, Yuehua Wang
Coping with the increasing environmental issues, niobium oxyfluoride (Nb3O7F) as a novel semiconductor is a kind of promising photocatalyst due to its outstanding electronic and optoelectrinic properties. However, the photocatalytic performance of Nb3O7F is restricted in practical application due to its weak optical absorption and low carrier separation. In this work, novel Nb3O7F/WS2 hybrid nanocomposites with superior optical absorption and photocatalytic activity have been successfully synthesized by a facile two-step sol-hydrothermal technique...
May 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28525260/three-dimensional-visualization-and-characterization-of-polymeric-self-assemblies-by-transmission-electron-microtomography
#7
Hiroshi Jinnai, Takeshi Higuchi, Xiaodong Zhuge, Akihito Kumamoto, Kees Joost Batenburg, Yuichi Ikuhara
Self-assembling structures and their dynamical processes in polymeric systems have been investigated using three-dimensional transmission electron microscopy (3D-TEM). Block copolymers (BCPs) self-assemble into nanoscale periodic structures called microphase-separated structures, a deep understanding of which is important for creating nanomaterials with superior physical properties, such as high-performance membranes with well-defined pore size and high-density data storage media. Because microphase-separated structures have become increasingly complicated with advances in precision polymerization, characterizing these complex morphologies is becoming increasingly difficult...
May 19, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28524850/a-high-quantum-yield-molecule-protein-complex-fluorophore-for-near-infrared-ii-imaging
#8
Alexander L Antaris, Hao Chen, Shuo Diao, Zhuoran Ma, Zhe Zhang, Shoujun Zhu, Joy Wang, Alexander X Lozano, Quli Fan, Leila Chew, Mark Zhu, Kai Cheng, Xuechuan Hong, Hongjie Dai, Zhen Cheng
Fluorescence imaging in the second near-infrared window (NIR-II) allows visualization of deep anatomical features with an unprecedented degree of clarity. NIR-II fluorophores draw from a broad spectrum of materials spanning semiconducting nanomaterials to organic molecular dyes, yet unfortunately all water-soluble organic molecules with >1,000 nm emission suffer from low quantum yields that have limited temporal resolution and penetration depth. Here, we report tailoring the supramolecular assemblies of protein complexes with a sulfonated NIR-II organic dye (CH-4T) to produce a brilliant 110-fold increase in fluorescence, resulting in the highest quantum yield molecular fluorophore thus far...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28524743/nanoparticle-exposures-from-nano-enabled-toner-based-printing-equipment-and-human-health-state-of-science-and-future-research-needs
#9
Sandra Vanessa Pirela, John Martin, Dhimiter Bello, Philip Demokritou
Toner formulations used by laser printers (LP) and photocopiers (PC), collectively called "toner-based printing equipment" (TPE), are nano-enabled products (NEP) because they contain several engineered nanomaterials (ENM) that improve toner performance. It has been shown that during consumer use (printing), these ENM are released in the air, together with other semi-volatile organic nanoparticles, and newly formed gaseous co-pollutants such as volatile organic compounds (VOC). The aim of this review is to detail and analyze physico-chemical and morphological (PCM), as well as the toxicological properties of particulate matter (PM) emissions from TPE...
May 19, 2017: Critical Reviews in Toxicology
https://www.readbyqxmd.com/read/28524663/polydopamine-generates-hydroxyl-free-radicals-under-uv-light-illumination
#10
Zehuan Wang, Feng Tang, Hailong Fan, Le Wang, Zhaoxia Jin
Polydopamine generally demonstrates as efficient free-radical scavenger. However, its free radical chemistry under illumination is unclear, which becomes important in view of growing studies of polydopamine applications in photoprotector and photothermal therapy. In this study, for the first time, we reported an experimental investigation of the generation of hydroxyl free-radicals from UV-illuminated polydopamine in aqueous environment. By using terephthalic acid as fluorescent probe, we have measured hydroxyl radicals generated from UV-illuminated polydopamine with different shapes and sizes...
May 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28524252/in-vivo-noninvasive-analysis-of-graphene-nanomaterial-pharmacokinetics-using-photoacoustic-flow-cytometry
#11
Dmitry A Nedosekin, Jacqueline Nolan, Chengzhong Cai, Shawn E Bourdo, Zeid Nima, Alexandru S Biris, Vladimir P Zharov
Graphene-based nanomaterials (GBNs) are quickly revolutionizing modern electronics, energy generation and storage, clothing and biomedical devices. Due to GBN's variety of physical and chemical parameters that define their toxicity and their aggregation in suspension, interpreting its toxicology without accurate information on graphene's distribution and behavior in live organisms is challenging. In this work, we present a laser-based optical detection methodology for noninvasive detection and pharmacokinetics analysis of GBNs directly in blood flow in mice using in vivo photoacoustic (PA) flow cytometry (PAFC)...
May 19, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28524069/helical-plant-viral-nanoparticles-bioinspired-synthesis-of-nanomaterials-and-nanostructures
#12
Kannan Badri Narayanan, Sung Soo Han
Viral nanotechnology is revolutionizing the biomimetic and bioinspired synthesis of novel nanomaterials. Bottom-up nanofabrication by self-assembly of individual molecular components of elongated viral nanoparticles (VNPs) and virus-like particles (VLPs) has resulted in the production of superior materials and structures in the nano(bio)technological fields. Viral capsids are attractive materials, because of their symmetry, monodispersity, and polyvalency. Helical VNPs/VLPs are unique prefabricated nanoscaffolds with large surface area to volume ratios and high aspect ratios, and enable the construction of exquisite supramolecular nanostructures...
May 19, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28523917/silica-nanoparticles-functionalized-with-zwitterionic-sulfobetaine-siloxane-for-application-as-a-versatile-antifouling-coating-system
#13
Brianna Rose Knowles, Pawel Wagner, Shane MacLaughlin, Michael J Higgins, Paul J Molino
The growing need to develop surfaces able to effectively resist biological fouling has resulted in the widespread investigation of nanomaterials with potential antifouling properties. However, the preparation of effective antifouling coatings is limited by the availability of reactive surface functional groups and our ability to carefully control and organise chemistries at a materials interface. Here, we present two methods of preparing hydrophilic low fouling surface coatings through reaction of silica nanoparticle suspensions and pre-deposited silica nanoparticle films with zwitterionic sulfobetaine...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28523908/peptide-functionalized-nanomaterials-for-efficient-isolation-of-her2-positive-circulating-tumor-cells
#14
Jiaxi Peng, Qiong Zhao, Wangshu Zheng, Ping Li, Wenzhe Li, Ling Zhu, Xiaoran Liu, Bin Shao, Huiping Li, Chen Wang, Yanlian Yang
Specific antigen-positive circulating tumor cell (CTC) detection is necessary in therapeutic response monitoring and targeted therapy guidance. The existence of human epidermal growth factor receptor 2 (HER2) and the concentration of HER2-positive CTCs are strong indicators for patient diagnosis, prognosis, and therapeutic monitoring. We managed the direct isolation of HER2-positive CTCs by peptide-functionalized nanomaterials, designing and screening a peptide as an HER2 antibody alternative demonstrating high HER2 affinity and selectivity...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28523720/tuning-of-the-optical-electronic-and-magnetic-properties-of-boron-nitride-nanosheets-with-oxygen-doping-and-functionalization
#15
Qunhong Weng, Dmitry G Kvashnin, Xi Wang, Ovidiu Cretu, Yijun Yang, Min Zhou, Chao Zhang, Dai-Ming Tang, Pavel B Sorokin, Yoshio Bando, Dmitri Golberg
Engineering of the optical, electronic, and magnetic properties of hexagonal boron nitride (h-BN) nanomaterials via oxygen doping and functionalization has been envisaged in theory. However, it is still unclear as to what extent these properties can be altered using such methodology because of the lack of significant experimental progress and systematic theoretical investigations. Therefore, here, comprehensive theoretical predictions verified by solid experimental confirmations are provided, which unambiguously answer this long-standing question...
May 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28522845/3d-micro-structured-arrays-of-zn%C3%AE-nanorods
#16
Argyro N Giakoumaki, George Kenanakis, Argyro Klini, Maria Androulidaki, Zacharias Viskadourakis, Maria Farsari, Alexandros Selimis
The fabrication of nanostructures with controlled assembly and architecture is very important for the development of novel nanomaterial-based devices. We demonstrate that laser techniques coupled with low-temperature hydrothermal growth enable complex three-dimensional ZnO nanorod patterning on various types of substrates and geometries. This methodology is based on a procedure involving the 3D scaffold fabrication using Multi-Photon Lithography of a photosensitive material, followed by Zn seeded Aqueous Chemical Growth of ZnO nanorods...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522411/halloysite-and-chitosan-oligosaccharide-nanocomposite-for-wound-healing
#17
Giuseppina Sandri, Carola Aguzzi, Silvia Rossi, Maria Cristina Bonferoni, Giovanna Bruni, Cinzia Boselli, Antonia Icaro Cornaglia, Federica Riva, Cesar Viseras, Carla Caramella, Franca Ferrari
Halloysite is a natural nanotubular clay mineral (HNTs, Halloysite Nano Tubes) chemically identical to kaolinite and, due to its good biocompatibility, is an attractive nanomaterial for a vast range of biological applications. Chitosan oligosaccharides are homo- or heterooligomers of N-acetylglucosamine and D-glucosamine, that accelerate wound healing by enhancing the functions of inflammatory and repairing cells. The aim of the work was the development of a nanocomposite based on HNTs and chitosan oligosaccharides, to be used as pour powder to enhance healing in the treatment of chronic wounds...
May 15, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28521168/ecotoxicity-testing-and-environmental-risk-assessment-of-iron-nanomaterials-for-sub-surface-remediation-recommendations-from-the-fp7-project-nanorem
#18
Rune Hjorth, Claire Coutris, Nhung H A Nguyen, Alena Sevcu, Juliàn Alberto Gallego-Urrea, Anders Baun, Erik J Joner
Nanoremediation with iron (Fe) nanomaterials opens new doors for treating contaminated soil and groundwater, but is also accompanied by new potential risks as large quantities of engineered nanomaterials are introduced into the environment. In this study, we have assessed the ecotoxicity of four engineered Fe nanomaterials, specifically, Nano-Goethite, Trap-Ox Fe-zeolites, Carbo-Iron(®) and FerMEG12, developed within the European FP7 project NanoRem for sub-surface remediation towards a test battery consisting of eight ecotoxicity tests on bacteria (V...
May 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28521151/intracellular-localization-and-toxicity-of-graphene-oxide-and-reduced-graphene-oxide-nanoplatelets-to-mussel-hemocytes-in-vitro
#19
Alberto Katsumiti, Radmila Tomovska, Miren P Cajaraville
Recently, graphene materials have attracted tremendous research interest due to their unique physicochemical properties that hold great promise in electronics, energy, materials and biomedical areas. Graphene oxide (GO) is one of the most extensively studied graphene derivatives. In order to improve GO electrical properties, nanoplatelets are chemically reduced, thus increasing nanoplatelet conductivity. This reduced GO (rGO) shows different properties and behavior compared to GO. Graphene-based wastes are expected to end up in the marine environment...
April 28, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28520475/kombucha-multimicrobial-community-under-simulated-spaceflight-and-martian-conditions
#20
O Podolich, I Zaets, O Kukharenko, I Orlovska, O Reva, L Khirunenko, M Sosnin, A Haidak, S Shpylova, E Rabbow, M Skoryk, M Kremenskoy, R Demets, N Kozyrovska, J-P de Vera
Kombucha microbial community (KMC) produces a cellulose-based biopolymer of industrial importance and a probiotic beverage. KMC-derived cellulose-based pellicle film is known as a highly adaptive microbial macrocolony-a stratified community of prokaryotes and eukaryotes. In the framework of the multipurpose international astrobiological project "BIOlogy and Mars Experiment (BIOMEX)," which aims to study the vitality of prokaryotic and eukaryotic organisms and the stability of selected biomarkers in low Earth orbit and in a Mars-like environment, a cellulose polymer structural integrity will be assessed as a biomarker and biotechnological nanomaterial...
May 2017: Astrobiology
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