keyword
MENU ▼
Read by QxMD icon Read
search

carbon nanotube

keyword
https://www.readbyqxmd.com/read/28724265/facile-synthesis-of-sio2-c-nanoparticles-anchored-on-mwnt-as-high-performance-anode-materials-for-li-ion-batteries
#1
Yan Zhao, Zhengjun Liu, Yongguang Zhang, Almagul Mentbayeva, Xin Wang, M Yu Maximov, Baoxi Liu, Zhumabay Bakenov, Fuxing Yin
Carbon-coated silica nanoparticles anchored on multi-walled carbon nanotubes (SiO2@C/MWNT composite) were synthesized via a simple and facile sol-gel method followed by heat treatment. Scanning and transmission electron microscopy (SEM and TEM) studies confirmed densely anchoring the carbon-coated SiO2 nanoparticles onto a flexible MWNT conductive network, which facilitated fast electron and lithium-ion transport and improved structural stability of the composite. As prepared, ternary composite anode showed superior cyclability and rate capability compared to a carbon-coated silica counterpart without MWNT (SiO2@C)...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28723679/preparation-and-application-of-n-doped-carbon-nanotube-arrays-on-graphene-fibers
#2
Mochen Li, Xiaohong Zhang, Haibin Jiang, Xiang Wang, Yue Ru, Jinliang Qiao
A new kind of carbon hybrid material with unique structure, outstanding mechanical and functional properties is reported in this article. Nitrogen-doped carbon nanotube arrays with inside located Ni particles are in-situ grown on the surface of phenolic carbon modified graphene fibers during their conversion from graphene oxide fibers. The carbon hybrid fiber exhibits not only high tensile strength and elongation at break, but also excellent flexibility since the carbon nanotube arrays cover the all surface of highly strong graphene fiber...
July 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28723154/interruption-of-hydrogen-bonding-networks-of-water-in-carbon-nanotubes-due-to-strong-hydration-shell-formation
#3
Yoshifumi Oya, Kenji Hata, Tomonori Ohba
We present the structures of NaCl aqueous solution in carbon nanotubes with diameters of 1, 2, and 3 nm based on an analysis performed using X-ray diffraction and canonical ensemble Monte Carlo simulations. Anomalously longer nearest-neighbor distances were observed in the electrolyte for the 1-nm-diameter carbon nanotubes; in contrast, in the 2 and 3 nm carbon nanotubes, the nearest-neighbor distances were shorter than those in the bulk electrolyte. We also observed similar properties for water in carbon nanotubes, which was expected because the main component of the electrolyte was water...
July 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28723148/sub-6-nm-palladium-nanoparticles-for-faster-more-sensitive-h2-detection-using-carbon-nanotube-ropes
#4
Xiaowei Li, Mya Le Thai, Rajen K Dutta, Shaopeng Qiao, Girija T Chandran, Reginald M Penner
Palladium (Pd) nanoparticle (NP)-decorated carbon nanotube (CNT) ropes (or CNT@PdNP) are used as the sensing element for hydrogen gas (H2) chemiresistors. In spite of the fact that Pd NPs have a mean diameter below 6 nm and are highly dispersed on the CNT surfaces, CNT@PdNP ropes produce a relative resistance change 20-30 times larger than is observed at single, pure Pd nanowires. Thus, CNT@PdNP rope sensors improve upon all H2 sensing metrics (speed, dynamic range, and limit-of-detection), relative to single Pd nanowires which heretofore have defined the state-of-the-art in H2 sensing performance...
February 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723074/paper-based-bimodal-sensor-for-electronic-skin-applications
#5
Minhyun Jung, Kyungkwan Kim, Bumjin Kim, Haena Cheong, Kwanwoo Shin, Oh-Sun Kwon, Jong-Jin Park, Sanghun Jeon
We present the development of a flexible bimodal sensor using a paper platform and ink-jet printing method, which are suited for low-cost fabrication processes and realization of flexible devices. In this study, we employed a vertically stacked bimodal device architecture in which a temperature sensor is stacked on top of a pressure sensor and operated on different principles, allowing the minimization of interference effects. For the temperature sensor placed in the top layer, we used the thermoelectric effect and formed a closed-loop thermocouple composed of two different printable inks: conductive PEDOT:PSS and silver nanoparticles on a flexible paper platform, and obtained temperature-sensing capability over a wide range (150 ℃)...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28723068/biomimetic-hybridization-of-kevlar-into-silk-fibroin-nanofibrous-strategy-for-improved-mechanic-properties-of-flexible-composites-and-filtration-membranes
#6
Lili Lv, Xiangsheng Han, Lu Zong, Mingjie Li, Jun You, Xiaochen Wu, Chaoxu Li
Silk, one of the strongest natural biopolymers, was hybridized with Kevlar, one of the strongest synthetic polymers, through a biomimetic nanofibrous strategy. Regenerated silk materials have outstanding properties in transparency, biocompatibility, biodegradability and sustainability, and promised the applications as diverse as in pharmaceutics, electronics, photonic devices and membranes. To compete with super mechanic properties of their natural counterpart, regenerated silk materials have been hybridized with inorganic fillers such as graphene and carbon nanotubes, but frequently losing essential mechanic flexibility...
July 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28722465/overview-on-the-surface-functionalization-mechanism-and-determination-of-surface-functional-groups-of-plasma-treated-carbon-nanotubes
#7
Cafer Saka
The use of carbon materials for many applications is due to the unique diversity of structures and properties ranging from chemical bonds between the carbon atoms of the materials to nanostructures, crystallite alignment and microstructures. Carbon nanotubes and other nanoscale carbonaceous materials draw much attention due to their physical and chemical properties such as high strength, high resistance to corrosion, electrical and thermal conductivity, stability and a qualified adsorbent. Carbon-based nanomaterials, which have a relatively large specific area and layered structure, can be used as an adsorbent for efficient removal of organic and inorganic contaminants...
July 19, 2017: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/28721537/controlling-activation-barrier-by-carbon-nanotubes-as-nano-chemical-reactors
#8
Alia Méjri, Fabien Picaud, Mohammed El Khalifi, Tijani Gharbi, Bahoueddine Tangour
The oxidative addition of primary amine on a monocyclic phospholane was studied in confined conditions. This one-step chemical reaction has been investigated using the DFT technique to elucidate the role of confinement in carbon nanotubes on the reaction. Calculations were carried out by a progressive increase of the nanotube diameters from 10 Å to 15 Å in order to highlight the dependence of the reactivity on the nanotube diameter. First, single point investigations were dedicated to the study of reactants, transition states, and products placed in the different nanotubes while keeping their optimized structure as free compounds...
August 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28719849/selective-cathodic-microbial-biofilm-retention-allows-a-high-current-to-sulfide-efficiency-in-sulfate-reducing-microbial-electrolysis-cells
#9
Guillermo Pozo, Yang Lu, Sebastien Pongy, Jürg Keller, Pablo Ledezma, Stefano Freguia
Selective microbial retention is of paramount importance for the long-term performance of cathodic sulfate reduction in microbial electrolysis cells (MECs) due to the slow growth rate of autotrophic sulfate-reducing bacteria. In this work, we investigate the biofilm retention and current-to-sulfide conversion efficiency using carbon granules (CG) or multi-wall carbon nanotubes deposited on reticulated vitreous carbon (MWCNT-RVC) as electrode materials. For ~2months, the MECs were operated at sulfate loading rates of 21 to 309gSO4 -S/m(2)/d...
July 12, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28719818/insights-into-the-unique-functionality-of-inorganic-micro-nanoparticles-for-versatile-ultrasound-theranostics
#10
REVIEW
Xiaoqin Qian, Xiaoxia Han, Yu Chen
The clinical ultrasound (US)-based theranostic biomedicine suffers from the critical issue that traditional microbubbles (MBs) have lots of drawbacks such as low stability, large particle size, difficult structural control, etc. The unique composition, structure and functionality of inorganic micro/nanoplatforms have shown their great prospect for solving these critical issues and drawbacks of traditional organic MBs. This review summarizes and discusses the state-of-art development on exploring inorganic micro/nanoparticles for versatile US-based biomedical applications, ranging from US imaging, photoacoustic imaging, sonodynamic therapy, high intensity-focused US ablation and US-triggered chemotherapy...
July 11, 2017: Biomaterials
https://www.readbyqxmd.com/read/28718919/putting-rings-around-carbon-nanotubes
#11
Emilio M Pérez
In the last five years, we have developed synthetic methods towards encapsulation of single walled carbon nanotubes (SWNTs) into organic macrocycles, to form rotaxane-type molecules. These are the first examples of mechanically interlocked SWNTs derivatives (MINTs). In this article, I discuss our motivation to continue developing chemistry of SWNTs at a time well past their hype. We explain our synthetic strategy and characterization methodology in detail, stressing the general aspects. In particular, we emphasize the importance of adequate control experiments and bulk spectroscopic and analytical data to determine the structure of SWNT derivatives, as opposed to relying only (or mostly) on microscopy...
July 18, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28718832/application-of-carbon-nanotubes-in-chiral-and-achiral-separations-of-pharmaceuticals-biologics-and-chemicals
#12
REVIEW
Ayman L Hemasa, Nenad Naumovski, William A Maher, Ashraf Ghanem
Carbon nanotubes (CNTs) possess unique mechanical, physical, electrical and absorbability properties coupled with their nanometer dimensional scale that renders them extremely valuable for applications in many fields including nanotechnology and chromatographic separation. The aim of this review is to provide an updated overview about the applications of CNTs in chiral and achiral separations of pharmaceuticals, biologics and chemicals. Chiral single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) have been directly applied for the enantioseparation of pharmaceuticals and biologicals by using them as stationary or pseudostationary phases in chromatographic separation techniques such as high-performance liquid chromatography (HPLC), capillary electrophoresis (CE) and gas chromatography (GC)...
July 18, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28718067/theoretical-and-experimental-in-vivo-study-of-antioxidant-activity-of-crocin-in-order-to-propose-novel-derivatives-with-higher-antioxidant-activity-and-their-delivery-via-nanotubes-and-nanocones
#13
Houshang Najafi, Zeynab Mohamadi Yarijani, Meysam Najafi
In this study, the antioxidant activity of crocin via experimental and theoretical methods was investigated. In order to induce oxidative stress, 30-min renal ischemia and 24-h reperfusion were used in male Wistar rats. Oxidative stress was assessed by measuring tissue malondialdehyde (MDA) and ferric reducing/antioxidant power (FRAP). The results showed that following ischemia/reperfusion, the level of MDA was increased and FRAP decreased. Both of these changes were alleviated by crocin administration. The bond dissociation enthalpy and ionization potential values as enthalpies of mechanism of antioxidant activity of crocin were calculated by density functional theory method...
July 17, 2017: Inflammation
https://www.readbyqxmd.com/read/28718026/solid-phase-extraction-of-multi-class-pharmaceuticals-from-environmental-water-samples-onto-modified-multi-walled-carbon-nanotubes-followed-by-lc-ms-ms
#14
Bojana Lalović, Tatjana Đurkić, Marija Vukčević, Ivona Janković-Častvan, Ana Kalijadis, Zoran Laušević, Mila Laušević
In this paper, pristine and chemically treated multi-walled carbon nanotubes (MWCNTs) were employed as solid-phase extraction sorbents for the isolation and enrichment of multi-class pharmaceuticals from the surface water and groundwater, prior to liquid chromatography-tandem mass spectrometry analysis. Thirteen pharmaceuticals that belong to different therapeutical classes (erythromycin, azithromycin, sulfamethoxazole, diazepam, lorazepam, carbamazepine, metoprolol, bisoprolol, enalapril, cilazapril, simvastatin, clopidogrel, diclofenac) and two metabolites of metamizole (4-acetylaminoantipyrine and 4-formylaminoantipyrine) were selected for this study...
July 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28717833/an-interdigital-array-microelectrode-aptasensor-based-on-multi-walled-carbon-nanotubes-for-detection-of-tetracycline
#15
Wenjie Hou, Zhaoqiang Shi, Yemin Guo, Xia Sun, Xiangyou Wang
In this study an impedance aptasensor was designed for sensitive, selective, and fast detection of tetracycline (TET) based on an interdigital array microelectrode (IDAM). The IDAM was integrated with impedance detection to miniaturize the conventional electrodes, enhance the sensitivity, shorten the detection time, and minimize interfering effects of non-target analytes in the solution. Due to their excellent conductivity, good biocompatibility, the multi-walled carbon nanotubes (MWCNTs) were used to modify the IDAM to immobilize TET aptamer effectively...
July 17, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28716122/systematic-evaluation-of-oligodeoxynucleotide-binding-and-hybridization-to-modified-multi-walled-carbon-nanotubes
#16
Anika Kaufmann, Silke Hampel, Christiane Rieger, David Kunhardt, Darja Schendel, Susanne Füssel, Bernd Schwenzer, Kati Erdmann
BACKGROUND: In addition to conventional chemotherapeutics, nucleic acid-based therapeutics like antisense oligodeoxynucleotides (AS-ODN) represent a novel approach for the treatment of bladder cancer (BCa). An efficient delivery of AS-ODN to the urothelium and then into cancer cells might be achieved by the local application of multi-walled carbon nanotubes (MWCNT). In the present study, pristine MWCNT and MWCNT functionalized with hydrophilic moieties were synthesized and then investigated regarding their physicochemical characteristics, dispersibility, biocompatibility, cellular uptake and mucoadhesive properties...
July 17, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28716119/stat1-dependent-and-independent-pulmonary-allergic-and-fibrogenic-responses-in-mice-after-exposure-to-tangled-versus-rod-like-multi-walled-carbon-nanotubes
#17
Katherine S Duke, Alexia J Taylor-Just, Mark D Ihrie, Kelly A Shipkowski, Elizabeth A Thompson, Erinn C Dandley, Gregory N Parsons, James C Bonner
BACKGROUND: Pulmonary toxicity of multi-walled carbon nanotubes (MWCNTs) is influenced by physicochemical characteristics and genetic susceptibility. We hypothesized that contrasting rigidities of tangled (t) versus rod-like (r) MWCNTs would result in differing immunologic or fibrogenic responses in mice and that these responses would be exaggerated in transgenic mice lacking the signal transducer and activator of transcription-1 (STAT1), a susceptible mouse model of pulmonary fibrosis...
July 17, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28715109/polymeric-monolith-column-composited-with-multiwalled-carbon-nanotubes-%C3%AE-cyclodextrin-for-the-selective-extraction-of-psoralen-and-isopsoralen
#18
Xu Ling, Li Zou, Zilin Chen
A polymeric column that contains a multiwalled carbon nanotubes-β-cyclodextrin composite was developed. The composite was wrapped into the poly(butyl methacrylate-ethylene dimethacrylate) monolith column (0.76 mm I.D. and 10 cm in length). The column was then applied for the online solid-phase microextraction of psoralen and isopsoralen from Fructus Psoraleae. Following microextraction, the coumarins were quantified by high-performance liquid chromatography with C18 separation column and UV detection. The effects of sample flow rate, sample volume and pH value were optimized...
July 17, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28714985/electrical-pumping-and-tuning-of-exciton-polaritons-in-carbon-nanotube-microcavities
#19
Arko Graf, Martin Held, Yuriy Zakharko, Laura Tropf, Malte C Gather, Jana Zaumseil
Exciton-polaritons are hybrid light-matter particles that form upon strong coupling of an excitonic transition to a cavity mode. As bosons, polaritons can form condensates with coherent laser-like emission. For organic materials, optically pumped condensation was achieved at room temperature but electrically pumped condensation remains elusive due to insufficient polariton densities. Here we combine the outstanding optical and electronic properties of purified, solution-processed semiconducting (6,5) single-walled carbon nanotubes (SWCNTs) in a microcavity-integrated light-emitting field-effect transistor to realize efficient electrical pumping of exciton-polaritons at room temperature with high current densities (>10 kA cm(-2)) and tunability in the near-infrared (1,060 nm to 1,530 nm)...
July 17, 2017: Nature Materials
https://www.readbyqxmd.com/read/28714984/carbon-nanotubes-wiry-matter-light-coupling
#20
Jeremy J Baumberg
No abstract text is available yet for this article.
July 17, 2017: Nature Materials
keyword
keyword
37498
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"