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https://www.readbyqxmd.com/read/29166026/electrospun-thin-walled-cuco2o4-c-nanotubes-as-bifunctional-oxygen-electrocatalysts-for-rechargeable-zn-air-batteries
#1
Xiaojun Wang, Yang Li, Ting Jin, Jing Meng, Lifang Jiao, Min Zhu, Jun Chen
Rational design of optimal bifunctional oxygen electrocatalyst with low cost and high activity is greatly desired for realization of rechargeable Zn-air batteries. Herein, we fabricate mesoporous thin-walled CuCo2O4@C with abundant nitrogen-doped nanotubes via coaxial electrospinning technique. Benefiting from high catalytic activity of ultrasmall CuCo2O4 particles, double active specific surface area of mesoporous nanotubes, and strong coupling with N-doped carbon matrix, the obtained CuCo2O4@C exhibits outstanding oxygen electrocatalytic activity and stability, which in terms of a positive onset potential (0...
November 22, 2017: Nano Letters
https://www.readbyqxmd.com/read/29165073/recent-progress-in-delivery-of-therapeutic-and-imaging-agents-utilizing-organic-inorganic-hybrid-nanoparticles
#2
Haque Sheikh Tanzina, Ezharul Chowdhury
Delivery of conventional small molecule drugs and currently evolving nucleic acid-based therapeutics, such as small interfering RNAs (siRNAs) and genes, and contrast agents for high resolution imaging, to the target site of action is highly demanding to increase the therapeutic and imaging efficacy while minimizing the off-target effects of the delivered molecules, as well as develop novel therapeutic and imaging approaches. Organic-inorganic hybrid nanoparticles offer a number of advantages by combining the unique properties of the organic and inorganic counterparts, thus improving the pharmacokinetic behavior and targetability of drugs and contrast agents, and conferring the exclusive optical and magnetic properties for both therapeutic and imaging purposes...
November 19, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/29164706/a-binder-free-and-free-standing-cobalt-sulfide-carbon-nanotube-cathode-material-for-aluminum-ion-batteries
#3
Yuxiang Hu, Delai Ye, Bin Luo, Han Hu, Xiaobo Zhu, Songcan Wang, Linlin Li, Shengjie Peng, Lianzhou Wang
Rechargeable aluminum-ion batteries (AIBs) are considered as a new generation of large-scale energy-storage devices due to their attractive features of abundant aluminum source, high specific capacity, and high energy density. However, AIBs suffer from a lack of suitable cathode materials with desirable capacity and long-term stability, which severely restricts the practical application of AIBs. Herein, a binder-free and self-standing cobalt sulfide encapsulated in carbon nanotubes is reported as a novel cathode material for AIBs...
November 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29164101/the-promoting-role-of-different-carbon-allotropes-cocatalysts-for-semiconductors-in-photocatalytic-energy-generation-and-pollutants-degradation
#4
REVIEW
Weiwei Han, Zhen Li, Yang Li, Xiaobin Fan, Fengbao Zhang, Guoliang Zhang, Wenchao Peng
Semiconductor based photocatalytic process is of great potential for solving the fossil fuels depletion and environmental pollution. Loading cocatalysts for the modification of semiconductors could increase the separation efficiency of the photogenerated hole-electron pairs, enhance the light absorption ability of semiconductors, and thus obtain new composite photocatalysts with high activities. Kinds of carbon allotropes, such as activated carbon, carbon nanotubes, graphene, and carbon quantum dots have been used as effective cocatalysts to enhance the photocatalytic activities of semiconductors, making them widely used for photocatalytic energy generation, and pollutants degradation...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29163880/recent-developments-in-the-selective-dispersion-of-single-walled-carbon-nanotubes-using-conjugated-polymers
#5
Darryl Fong, Alex Adronov
A significant barrier that impedes the commercialization of single-walled carbon nanotube-related applications is that all known synthetic methods produce a complicated mixture of semiconducting and metallic species. For device applications, pure semiconducting or pure metallic samples are desirable. Thus far, the purification methods that have been identified are capable of separating individual carbon nanotube species on a microgram scale, but purification on a large scale has remained elusive. The use of conjugated polymers to selectively disperse specific nanotube species is a promising approach to resolve the scalability issue, but a comprehensive understanding of the selectivity mechanism has not yet been achieved...
November 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29161995/carbon-capture-from-natural-gas-using-multi-walled-cnts-based-mixed-matrix-membranes
#6
Abid Hussain, Sarah Farrukh, Arshad Hussain, Muhammad Ayoub
Most of the pure polymers and their blends, utilized in carbon capture membranes are costly but cellulose acetate (CA) being inexpensive, is a lucrative choice. In this research polymeric and mixed matrix membranes (MMMs) have been fabricated to carbon capture from Natural gas. Polyethylene glycol (PEG) has been utilized in the fabrication of these membranes to modify the chain flexibility of polymers which in turn amends the permeability of different gases through these polymers. Whereas multi-wall carbon nanotubes (MWCNTs) provide mechanical strength, thermal stability, an extra free path for CO2 molecules and augment CO2/CH4 selectivity...
November 22, 2017: Environmental Technology
https://www.readbyqxmd.com/read/29161677/nanotechnology-based-recent-approaches-for-sensing-and-remediation-of-pesticides
#7
REVIEW
Deepak Rawtani, Nitasha Khatri, Sanjiv Tyagi, Gaurav Pandey
Pesticides are meant to control and destroy the pests and weeds. They are classified into different categories on the basis their origin and type of pest they target. Chemical pesticides such as insecticides, herbicides and fungicides are commonly used in agricultural fields. However, the excessive use of these agrochemicals have adverse effects on environment such as reduced population of insect pollinators, threat to endangered species and habitat of birds. Upon consumption; chemical pesticides also cause various health issues such as skin, eye and nervous system related problems and cancer upon prolonged exposure...
November 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29161515/potential-profile-of-stabilized-field-induced-lateral-p-n-junction-in-transition-metal-dichalcogenides
#8
Yijin Zhang, Ryuji Suzuki, Yoshihiro Iwasa
Electric field-induced p-n junctions are often used to realize peculiar functionalities in various materials. This method can be applied not only to conventional semiconductors but also to carbon nanotubes, graphene, and organic semiconductors to which the conventional chemical doping method is difficult to be applied. Transition-metal dichalcogenides (TMDs) are one of such materials where the field-induced p-n junctions play crucial roles in realizing solar cell and light-emitting diode operations as well as circularly polarized electroluminescence...
November 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/29161037/biodegradation-of-carbon-nanotube-polymer-nanocomposites-using-a-monoculture
#9
David G Goodwin, Iruhany Boyer, Thomas Devahif, Cong Gao, Benjamin Frank, Xier Lu, Leo Kuwama, Tucker B Gordon, JingJing Wang, James F Ranville, Edward J Bouwer, D Howard Fairbrother
The biodegradation rates of carbon nanotube (CNT)/ polymer nanocomposites (PNCs) containing poly-ɛ-caprolactone (PCL) were investigated using Pseudomonas aeruginosa, a microorganism commonly found in the environment. CNT/PCL nanocomposite mass loss profiles revealed that the rate of PCL matrix biodegradation decreased systematically as the CNT loading increased from 0.1 to 10% w/w. Addition of even a low CNT loading (< 1% w/w) caused the CNT/PCL biodegradation rate constant to decrease by more than 50%...
November 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29160225/phosphatidylserine-targeted-single-walled-carbon-nanotubes-for-photothermal-ablation-of-bladder-cancer
#10
Needa A Virani, Carole Davis, Patrick McKernan, Paul Hauser, Robert E Hurst, Joel Slaton, Ricardo P Silvy, Daniel E Resasco, Roger G Harrison
Bladder cancer has a 60-70% recurrence rate most likely due to residual tumour left behind after a transurethral resection (TUR). Failure to completely resect the cancer can lead to recurrence and progression into higher grade tumours with metastatic potential. We present here a novel therapy to treat superficial tumours with the potential to decrease recurrence. The therapy is a heat-based approach in which bladder tumour specific single-walled carbon nanotubes (SWCNTs) are delivered intravesically at a very low dose (0...
November 21, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29159501/a-fundamental-study-of-photoluminescence-modulation-from-dna-wrapped-single-walled-carbon-nanotubes
#11
Shusuke Oura, Masahiro Ito, Yoshikazu Homma, Kazuo Umemura
In this study, we investigated the interaction of base sequence-assigned single-stranded DNA (ssDNA) molecules with the surfaces of single-walled carbon nanotube (SWNT)-thymine (T30)/cytosine (C30) hybrids (T30/C30-SWNT), by measuring the modulation of near-infrared (NIR) photoluminescence (PL). Significant PL shifts were observed when T30/C30-SWNTs were reacted with 30-mers of adenine (A30)/guanine (G30). In contrast, when non-complementary ssDNA was used, no significant energy shift was observed in the PL modulation except when T30-SWNTs were reacted with G30...
November 20, 2017: European Biophysics Journal: EBJ
https://www.readbyqxmd.com/read/29159232/application-of-bi-clustering-of-gene-expression-data-and-gene-set-enrichment-analysis-methods-to-identify-potentially-disease-causing-nanomaterials
#12
Andrew Williams, Sabina Halappanavar
This article contains data related to the research article 'Application of bi-clustering of gene expression data and gene set enrichment analysis methods to identify potentially disease causing nanomaterials' (Williams and Halappanavar, 2015) [1]. The presence of diverse types of nanomaterials (NMs) in commerce has grown significantly in the past decade and as a result, human exposure to these materials in the environment is inevitable. The traditional toxicity testing approaches that are reliant on animals are both time- and cost- intensive; employing which, it is not possible to complete the challenging task of safety assessment of NMs currently on the market in a timely manner...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29156620/stretchable-highly-durable-ternary-nanocomposite-strain-sensor-for-structural-health-monitoring-of-flexible-aircraft
#13
Feng Yin, Dong Ye, Chen Zhu, Lei Qiu, YongAn Huang
Harmonious developments of electrical and mechanical performances are crucial for stretchable sensors in structural health monitoring (SHM) of flexible aircraft such as aerostats and morphing aircrafts. In this study, we prepared a highly durable ternary conductive nanocomposite made of polydimethylsiloxane (PDMS), carbon black (CB) and multi-walled carbon nanotubes (MWCNTs) to fabricate stretchable strain sensors. The nanocomposite has excellent electrical and mechanical properties by intensively optimizing the weight percentage of conducting fillers as well as the ratio of PDMS pre-polymer and curing agent...
November 20, 2017: Sensors
https://www.readbyqxmd.com/read/29156255/competitive-adsorption-of-ppcp-and-humic-substances-by-carbon-nanotube-membranes-effects-of-coagulation-and-ppcp-properties
#14
Yifei Wang, Qing Yang, Junqing Dong, Haiou Huang
Natural organic matter (NOM) and pharmaceuticals and personal care products (PPCP) are known to compete for adsorption sites on carbon nanotubes (CNT), resulting in decreasing PPCP adsorption onto CNT. In this study, four types of PPCP, as such acetaminophen (AAP), caffeine (CAF), triclosan (TCS), and carbendazim (CBD) were used to investigate the effects of PPCP properties and NOM coagulation on the competitive adsorption of PPCP and NOM. Coagulation preferentially removed HS from a natural surface water, thereby increasing adsorption of AAP, CAF, TCS and CBD by 19%, 13%, 17% and 11%, respectively...
November 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29156237/skeleton-skin-structured-rgo-cnts-pani-composite-fiber-electrodes-with-excellent-mechanical-and-electrochemical-performance-for-all-solid-state-symmetric-supercapacitors
#15
Dong Liu, Pengcheng Du, Wenli Wei, Hongxing Wang, Qi Wang, Peng Liu
Polyaniline coated reduced graphene oxide/carbon nanotube composite fibers ((RGO/CNTs)@PANI, RCP) with skeleton/skin structure are designed as fiber-shaped electrodes for high performance all-solid-state symmetric supercapacitor. The one-dimensional reduced graphene oxide/carbon nanotube composite fibers (RGO/CNTs, RC) are prepared via a simple in-situ reduction of graphene oxide in presence of carbon nanotubes in quartz glass pipes, which exhibit excellent mechanical performance of >193.4 MPa of tensile strength...
November 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29155432/in-situ-formed-fe-n-doped-metal-organic-framework-carbon-nanotubes-graphene-hybrids-for-a-rechargeable-zn-air-battery
#16
Wenxiu Yang, Yelong Zhang, Xiangjian Liu, Lulu Chen, Jianbo Jia
This study presents an in situ route to produce 3D Fe-N doped metal organic framework@carbon nanotubes/graphene (Fe-MOF@CNTs-G) hybrids as efficient oxygen reduction reaction (ORR) catalysts in both basic and acidic solutions. A rechargeable zinc-air battery assembled with Fe-MOF@CNTs-G exhibits a lower charge/discharge overpotential than the commercial IrO2 + 20% Pt/C catalyst.
November 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29154051/ecotoxicological-effects-of-carbon-based-nanomaterials-in-aquatic-organisms
#17
REVIEW
Anna Freixa, Vicenç Acuña, Josep Sanchís, Marinella Farré, Damià Barceló, Sergi Sabater
An increasing amount of carbon-based nanomaterials (CNM) (mostly fullerenes, carbon nanotubes and graphene) has been observed in aquatic systems over the last years. However, the potential toxicity of these CNM on aquatic ecosystems remains unclear. This paper reviews the existing literature on the toxic effects of CNM in aquatic organisms as well as the toxic effects of CNM through influencing the toxicity of other micro-pollutants, and outlines a series of research needs to reduce the uncertainty associated with CNMs toxic effects...
November 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29153082/advances-in-sensing-and-biosensing-of-bisphenols-a-review
#18
REVIEW
Dhanjai, Ankita Sinha, Lingxia Wu, Xianbo Lu, Jiping Chen, Rajeev Jain
Bisphenols (BPs) are well known endocrine disrupting chemicals (EDCs) that cause adverse effects on the environment, biotic life and human health. BPs have been studied extensively because of an increasing concern for the safety of the environment and for human health. They are major raw materials for manufacturing polycarbonates, thermal papers and epoxy resins and are considered hazardous environmental contaminants. A vast array of sensors and biosensors have been developed for the sensitive screening of BPs based on carbon nanomaterials (carbon nanotubes, fullerenes, graphene and graphene oxide), quantum dots, metal and metal oxide nanocomposites, polymer nanocomposites, metal organic frameworks, ionic liquids and molecularly imprinted polymers...
January 15, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29150653/a-theoretical-quest-for-high-temperature-superconductivity-on-the-example-of-low-dimensional-carbon-structures
#19
C H Wong, R Lortz, E A Buntov, R E Kasimova, A F Zatsepin
High temperature superconductivity does not necessarily require correlated electron systems with complex competing or coexisting orders. Instead, it may be achieved in a phonon-mediated classical superconductor having a high Debye temperature and large electronic density of states at the Fermi level in a material with light atoms and strong covalent bonds. Quasi-1D conductors seem promising due to the Van Hove singularities in their electronic density of states. In this sense, quasi-1D carbon structures are good candidates...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29149996/coupling-of-two-centrifugeless-ultrasound-assisted-dispersive-solid-liquid-phase-microextractions-as-a-highly-selective-clean-and-efficient-method-for-determination-of-ultra-trace-amounts-of-non-steroidal-anti-inflammatory-drugs-in-complicated-matrices
#20
Somayeh Arghavani-Beydokhti, Maryam Rajabi, Alireza Asghari
In this work, a new, simple, rapid, and environmentally friendly method with a high sample clean-up capability termed as centrifugeless ultrasound-assisted dispersive micro solid-phase extraction coupled with salting-out ultrasound-assisted liquid-liquid microextraction based on solidification of a floating organic droplet followed by high performance liquid chromatography is introduced for the first time. In this method, the three non-steroidal anti-inflammatory drugs diclofenac, ibuprofen, and mefenamic acid are first extracted based on an effective nanoadsorbent named as the layered double hydroxide-carbon nanotube nanohybrid...
January 2, 2018: Analytica Chimica Acta
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