keyword
MENU ▼
Read by QxMD icon Read
search

nanomaterial

keyword
https://www.readbyqxmd.com/read/28343075/an-update-on-application-of-nanotechnology-and-stem-cells-in-spinal-cord-injury-regeneration
#1
REVIEW
Kazem Nejati-Koshki, Yousef Mortazavi, Younes Pilehvar-Soltanahmadi, Sumit Sheoran, Nosratollah Zarghami
Spinal cord injury (SCI) is damage to the spinal cord that leads to sudden loss of motor and autonomic function and sensory under the level of the injury. The pathophysiological advancement of SCI is divided into two categories: primary injury and secondary injury. Due to the loss of motor, sensory, or cognitive function, a patient's quality of life is likely reduced and places a great burden on society in order to supply health care costs. Therefore, it is important to develop suitable therapeutic strategies for SCI therapy...
March 23, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28342712/therapeutic-targets-in-the-selective-killing-of-cancer-cells-by-nanomaterials
#2
REVIEW
Mohd Javed Akhtar, Maqusood Ahamed, Hisham A Alhadlaq
Cancer is the result of numerous defects in key regulatory proteins and pathways, and targeting them with anticancer agents is associated with severe systemic toxicity. Increased levels of reactive oxygen species (ROS) and compensatory antioxidant levels in cancer cells have emerged as broad spectrum targets for therapeutic interventions. The biochemical features of cancer provide multiple but overlapping opportunities that could be efficiently exploited by the optimally engineered particulate characteristics of nanomaterials (NMs)...
March 22, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28342377/live-cell-biosensing-platforms-using-graphene-based-hybrid-nanomaterials
#3
REVIEW
Tae-Hyung Kim, Donghyun Lee, Jeong-Woo Choi
A novel strategy to precisely detect or monitor various biomaterials in living cells poses paramount importance in understanding cellular processes. Graphene, a newly emerged two-dimensional carbon material, has been widely utilized for biosensors owing to its multifarious characteristics including mechanical, electrical, and optical properties (e.g. stability, conductivity, fluorescence quenching and photoluminescence). In addition, graphene derivatives and their innate characteristics, such as biocompatibility low cytotoxicity and water solubility have facilitated the use of graphene-based materials for live cell biosensing, wherein graphene is utilized as a core material by itself or in combination with other functional nanomaterials to load target-specific probes, fluorescent dyes, and other signaling molecules...
March 18, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28342308/shape-selective-catalysis-and-surface-enhanced-raman-scattering-studies-using-ag-nanocubes-nanospheres-and-aggregated-anisotropic-nanostructures
#4
Subrata Kundu, Wei Dai, Yunyun Chen, Lian Ma, Yuan Yue, Alexander M Sinyukov, Hong Liang
Three morphologies of silver nanoparticles (Ag NPs) such as nanocubes, aggregated anisotropic Ag NPs, and nanospheres were prepared using polystyrene sulfonate (PSS) and citrate as stabilizing agents utilizing a simple wet-chemical and microwave heating route respectively. Ag nanocubes were prepared within one min through microwave heating whereas anisotropic Ag NPs and spherical Ag NPs via 5 and 30min of normal stirring at room temperature (RT) respectively. The shape effect of three different morphologies of Ag NPs were examined in catalysis reaction and in surface enhanced Raman scattering (SERS) studies...
March 16, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28340464/a-review-on-various-electrochemical-techniques-for-heavy-metal-ions-detection-with-different-sensing-platforms
#5
REVIEW
BabanKumar Bansod, Tejinder Kumar, Ritula Thakur, Shakshi Rana, Inderbir Singh
Heavy metal ions are non-biodegradable and contaminate most of the natural resources occurring in the environment including water. Some of the heavy metals including Lead (Pb), Mercury (Hg), Arsenic (As), Chromium (Cr) and Cadmium (Cd) are considered to be highly toxic and hazardous to human health even at trace levels. This leads to the requirement of fast, accurate and reliable techniques for the detection of heavy metal ions. This review presents various electrochemical detection techniques for heavy metal ions those are user friendly, low cost, provides on-site and real time monitoring as compared to other spectroscopic and optical techniques...
March 18, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28340297/atomic-scale-snapshots-of-the-formation-and-growth-of-hollow-ptni-c-nanocatalysts
#6
Raphael Chattot, Tristan Asset, Jakub Drnec, Pierre Bordet, Jaysen Nelayah, Laetitia Dubau, Frédéric Maillard
Determining the formation and growth mechanism of bimetallic nanoparticles (NPs) with atomic detail is fundamental to synthesize efficient 'catalysts by design'. However, the understanding of the elementary steps, which take place during their synthesis remains elusive. Herein, we have exploited scanning transmission electron microscopy coupled to energy dispersive X-ray spectroscopy, operando wide angle and small angle X-ray scattering and electrochemistry to unveil the formation and growth mechanism of hollow PtNi/C NPs...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28339184/mxene-ti3c2-an-effective-2d-light-to-heat-conversion-material
#7
Renyuan Li, Lianbin Zhang, Le Shi, Peng Wang
MXene, a new series of 2D material, has been steadily advancing its applications to a variety of fields, such as catalysis, supercapacitor, molecular separation, electromagnetic wave interference shielding. This work reports a carefully designed aqueous droplet light heating system along with a thorough mathematical procedure, which combined leads to a precise determination of internal light-to-heat conversion efficiency of a variety of nanomaterials. The internal light-to-heat conversion efficiency of MXene, more specifically Ti3C2, was measured to be 100%, indicating a perfect energy conversion...
March 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28338328/polysulfide-breathing-dual-conductive-heterolayered-battery-separator-membranes-based-on-0d-1d-mingled-nanomaterial-composite-mats
#8
Jeong-Hoon Kim, Gwan Yeong Jung, Yong-Hyeok Lee, Jung-Hwan Kim, Sun-Young Lee, Sang Kyu Kwak, Sang-Young Lee
Facile/sustainable utilization of sulfur active materials is an ultimate challenge in high-performance lithium-sulfur (Li-S) batteries. Here, as a membrane-driven approach to address this issue, we demonstrate a new class of polysulfide-breathing (capable of reversibly adsorbing and desorbing polysulfides)/dual (electron and ion)-conductive, heterolayered battery separator membranes (denoted as "MEC-AA separators") based on 0D (nanoparticles)/1D (nanofibers) composite mats. The MEC-AA separator is fabricated through an in-series, concurrent electrospraying/electrospinning process...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28338323/shape-dependent-radiosensitization-effect-of-gold-nanostructures-in-cancer-radiotherapy-comparison-of-gold-nanoparticles-nanospikes-and-nanorods
#9
Ningning Ma, Fu-Gen Wu, Xiaodong Zhang, Yao-Wen Jiang, Hao-Ran Jia, Hong-Yin Wang, Yan-Hong Li, Peidang Liu, Ning Gu, Zhan Chen
The shape effect of gold (Au) nanomaterials on the efficiency of cancer radiotherapy has not been fully elucidated. To address this issue, Au nanomaterials with different shapes but similar average size (~50 nm) including gold nanoparticles (GNPs), gold nanospikes (GNSs), and gold nanorods (GNRs) were synthesized and functionalized with poly(ethylene glycol) (PEG) molecules. Although all these Au nanostructures were coated with the same PEG molecules, their cellular uptake behavior differed significantly. The GNPs showed the highest cellular responses compared to the GNSs and the GNRs (based on the same gold mass) after incubation with KB cancer cells for 24 h...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28338287/synthesis-of-rationally-halogenated-buckybowls-by-chemoselective-aromatic-c-f-bond-activation
#10
Olena Papaianina, Vladimir A Akhmetov, Alexey A Goryunkov, Frank Hampel, Frank W Heinemann, Konstantin Y Amsharov
Halogenated buckybowls or bowl-shaped polycyclic aromatic hydrocarbons (BS-PAHs) are key building blocks for the "bottom-up" synthesis of various carbon-based nanomaterials with outstanding potential in different fields of technology. The current state of the art provides quite a limited number of synthetic pathways to BS-PAHs; moreover, none of these approaches show high selectivity and tolerance of functional groups. Herein we demonstrate an effective route to BS-PAHs that includes directed intramolecular aryl-aryl coupling through C-F bond activation...
March 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28338285/remote-control-of-cellular-functions-the-role-of-smart-nanomaterials-in-the-medicine-of-the-future
#11
REVIEW
Giada Graziana Genchi, Attilio Marino, Agostina Grillone, Ilaria Pezzini, Gianni Ciofani
The remote control of cellular functions through smart nanomaterials represents a biomanipulation approach with unprecedented potential applications in many fields of medicine, ranging from cancer therapy to tissue engineering. By actively responding to external stimuli, smart nanomaterials act as real nanotransducers able to mediate and/or convert different forms of energy into both physical and chemical cues, fostering specific cell behaviors. This report describes those classes of nanomaterials that have mostly paved the way to a "wireless" control of biological phenomena, focusing the discussion on some examples close to the clinical practice...
March 24, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28337915/nano-raman-scattering-microscopy-resolution-and-enhancement
#12
Satoshi Kawata, Taro Ichimura, Atsushi Taguchi, Yasuaki Kumamoto
Raman scattering microscopy is becoming one of the hot topics in analytical microscopy as a tool for analyzing advanced nanomaterials, such as biomolecules in a live cell for the study of cellular dynamics, semiconductor devices for characterizing strain distribution and contamination, and nanocarbons and nano-2D materials. In this paper, we review the recent progress in the development of Raman scattering microscopy from the viewpoint of spatial resolution and scattering efficiency. To overcome the extremely small cross section of Raman scattering, we discuss three approaches for the enhancement of scattering efficiency and show that the scattering enhancement synergistically increases the spatial resolution...
March 24, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28337774/alumina-at-50-and-13%C3%A2-nm-nanoparticle-sizes-have-potential-genotoxicity
#13
Qinli Zhang, Haiyang Wang, Cuicui Ge, Jeremy Duncan, Kaihong He, Samuel O Adeosun, Huaxin Xi, Huiting Peng, Qiao Niu
Although nanomaterials have the potential to improve human life, their sideline effects on human health seem to be inevitable and still are unknown. Some studies have investigated the genotoxicity of alumina nanoparticles (AlNPs); however, this effect is still unclear due to insufficient evaluation and conflicting results. Using a battery of standard genotoxic assays, the present study offers evidence of the genotoxicity associated with aluminum oxide (alumina) at NP sizes of 50 and 13 nm, when compared with bulk alumina (10 μm)...
March 24, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28337404/revising-reach-guidance-on-information-requirements-and-chemical-safety-assessment-for-engineered-nanomaterials-for-aquatic-ecotoxicity-endpoints-recommendations-from-the-envnano-project
#14
Steffen Foss Hansen, Sara Nørgaard Sørensen, Lars Michael Skjolding, Nanna B Hartmann, Anders Baun
The European Chemical Agency (ECHA) is in the process of revising its guidance documents on how to address the challenges of ecotoxicological testing of nanomaterials. In these revisions, outset is taken in the hypothesis that ecotoxicological test methods, developed for soluble chemicals, can be made applicable to nanomaterials. European Research Council project EnvNano-Environmental Effects and Risk Evaluation of Engineered, which ran from 2011 to 2016, took another outset by assuming that: "The behaviour of nanoparticles in suspension is fundamentally different from that of chemicals in solution"...
2017: Environmental Sciences Europe
https://www.readbyqxmd.com/read/28336905/a-nanostructured-matrices-assessment-to-study-drug-distribution-in-solid-tumor-tissues-by-mass-spectrometry-imaging
#15
Silvia Giordano, Valentina Pifferi, Lavinia Morosi, Melinda Morelli, Luigi Falciola, Giuseppe Cappelletti, Sonja Visentin, Simonetta A Licandro, Roberta Frapolli, Massimo Zucchetti, Roberta Pastorelli, Laura Brunelli, Maurizio D'Incalci, Enrico Davoli
The imaging of drugs inside tissues is pivotal in oncology to assess whether a drug reaches all cells in an adequate enough concentration to eradicate the tumor. Matrix-Assisted Laser Desorption Ionization Mass Spectrometry Imaging (MALDI-MSI) is one of the most promising imaging techniques that enables the simultaneous visualization of multiple compounds inside tissues. The choice of a suitable matrix constitutes a critical aspect during the development of a MALDI-MSI protocol since the matrix ionization efficiency changes depending on the analyte structure and its physico-chemical properties...
March 21, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336890/in-vitro-comparative-skin-irritation-induced-by-nano-and-non-nano-zinc-oxide
#16
Maria Pilar Vinardell, Hector Llanas, Laura Marics, Montserrat Mitjans
This study was designed to determine whether nano-sized ZnO has the potential to cause acute cutaneous irritation using cultured HaCaT keratinocytes and a human skin equivalent as in vitro models, compared to non-nanomaterials. Commercial nano ZnO with different sizes (50 nm and 100 nm) was characterized by dynamic light scattering (DLS) and microscopy (SEM) in different media. Nano ZnO reduced the cell viability of HaCaT in a dose-dependent and time-dependent manner, in a similar way to macro ZnO. However, the 3D-epidermis model revealed no irritation at 1 mg/mL after 24 h of exposure...
March 4, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336883/evaluating-adverse-effects-of-inhaled-nanoparticles-by-realistic-in-vitro-technology
#17
REVIEW
Marianne Geiser, Natalie Jeannet, Martin Fierz, Heinz Burtscher
The number of daily products containing nanoparticles (NP) is rapidly increasing. NP in powders, dispersions, or sprays are a yet unknown risk for incidental exposure, especially at workplaces during NP production and processing, and for consumers of any health status and age using NP containing sprays. We developed the nano aerosol chamber for in vitro toxicity (NACIVT), a portable instrument for realistic safety testing of inhaled NP in vitro and evaluated effects of silver (Ag) and carbon (C) NP-which belong to the most widely used nanomaterials-on normal and compromised airway epithelia...
February 22, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336880/synthesis-of-carbon-nanotubes-in-thermal-plasma-reactor-at-atmospheric-pressure
#18
Lukasz Szymanski, Zbigniew Kolacinski, Slawomir Wiak, Grzegorz Raniszewski, Lukasz Pietrzak
In this paper, a novel approach to the synthesis of the carbon nanotubes (CNTs) in reactors operating at atmospheric pressure is presented. Based on the literature and our own research results, the most effective methods of CNT synthesis are investigated. Then, careful selection of reagents for the synthesis process is shown. Thanks to the performed calculations, an optimum composition of gases and the temperature for successful CNT synthesis in the CVD (chemical vapor deposition) process can be chosen. The results, having practical significance, may lead to an improvement of nanomaterials synthesis technology...
February 18, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336875/nico%C3%A2-o%C3%A2-based-supercapacitor-nanomaterials
#19
REVIEW
Chenggang Wang, E Zhou, Weidong He, Xiaolong Deng, Jinzhao Huang, Meng Ding, Xianqi Wei, Xiaojing Liu, Xijin Xu
In recent years, the research on supercapacitors has ushered in an explosive growth, which mainly focuses on seeking nano-/micro-materials with high energy and power densities. Herein, this review will be arranged from three aspects. We will summarize the controllable architectures of spinel NiCo₂O₄ fabricated by various approaches. Then, we introduce their performances as supercapacitors due to their excellent electrochemical performance, including superior electronic conductivity and electrochemical activity, together with the low cost and environmental friendliness...
February 15, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336861/modified-continuum-mechanics-modeling-on-size-dependent-properties-of-piezoelectric-nanomaterials-a-review
#20
REVIEW
Zhi Yan, Liying Jiang
Piezoelectric nanomaterials (PNs) are attractive for applications including sensing, actuating, energy harvesting, among others in nano-electro-mechanical-systems (NEMS) because of their excellent electromechanical coupling, mechanical and physical properties. However, the properties of PNs do not coincide with their bulk counterparts and depend on the particular size. A large amount of efforts have been devoted to studying the size-dependent properties of PNs by using experimental characterization, atomistic simulation and continuum mechanics modeling with the consideration of the scale features of the nanomaterials...
January 26, 2017: Nanomaterials
keyword
keyword
53983
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"