keyword
MENU ▼
Read by QxMD icon Read
search

nanomaterial

keyword
https://www.readbyqxmd.com/read/28448443/the-effect-of-thermal-fluctuation-on-the-receptor-mediated-adhesion-of-a-cell-membrane-to-an-elastic-substrate
#1
Bahador Marzban, Hongyan Yuan
Mechanics of the bilayer membrane play an important role in many biological and bioengineering problems such as cell-substrate and cell-nanomaterial interactions. In this work, we study the effect of thermal fluctuation and the substrate elasticity on the cell membrane-substrate adhesion. We model the adhesion of a fluctuating membrane on an elastic substrate as a two-step reaction comprised of the out-of-plane membrane fluctuation and the receptor-ligand binding. The equilibrium closed bond ratio as a function of substrate rigidity was computed by developing a coupled Fourier space Brownian dynamics and Monte Carlo method...
April 27, 2017: Membranes
https://www.readbyqxmd.com/read/28448113/a-solvent-free-chemical-approach-to-synthesize-various-morphological-co3o4-for-co-oxidation
#2
Kun Wang, Yali Cao, Jindou Hu, Yizhao Li, Jing Xie, Dianzeng Jia
The synthesis of Co3O4 nanomaterials with diverse morphologies were usually synthesized in liquid phase accompanied by the template or surfactant, even harsh conditions, which further restricted their practical application. Herein, we reported an extremely simple and practical solid-state chemical method to synthesize Co3O4-octahedrons, -plates and -rods. Among these, the shape control of Co3O4-octahedrons and Co3O4-plates involve the variation of the amount of reactant, and the formation of Co3O4-rods with {110} facet can be achieved by replacing the reactant...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28447687/can-dual-ligand-targeting-enhance-cellular-uptake-of-nanoparticles
#3
Qiang-Sheng Xia, Hong-Ming Ding, Yu-Qiang Ma
Dual ligand targeting to different types of over-expressed receptors on cell surfaces is a promising strategy in nanomedicine. Here, by using dissipative particle dynamics simulations, the effect of the surface distribution and physicochemical properties of dual ligands on the cellular uptake of nanoparticles is systematically studied. It is found that the spontaneous rearrangement of dual ligands (from random to patterned distribution) on the nanoparticle surface can enhance the cellular uptake of nanoparticles...
April 27, 2017: Nanoscale
https://www.readbyqxmd.com/read/28447665/creation-of-energetic-biothermite-inks-using-ferritin-liquid-protein
#4
Joseph M Slocik, Ruel McKenzie, Patrick B Dennis, Rajesh R Naik
Energetic liquids function mainly as fuels due to low energy densities and slow combustion kinetics. Consequently, these properties can be significantly increased through the addition of metal nanomaterials such as aluminium. Unfortunately, nanoparticle additives are restricted to low mass fractions in liquids because of increased viscosities and severe particle agglomeration. Nanoscale protein ionic liquids represent multifunctional solvent systems that are well suited to overcoming low mass fractions of nanoparticles, producing stable nanoparticle dispersions and simultaneously offering a source of oxidizing agents for combustion of reactive nanomaterials...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28447606/a-tunable-high-pass-filter-for-simple-and-inexpensive-size-segregation-of-sub-10-nm-nanoparticles
#5
N C Surawski, S Bezantakos, K Barmpounis, M C Dallaston, A Schmidt-Ott, G Biskos
Recent advanced in the fields of nanotechnology and atmospheric sciences underline the increasing need for sizing sub-10-nm aerosol particles in a simple yet efficient way. In this article, we develop, experimentally test and model the performance of a High-Pass Electrical Mobility Filter (HP-EMF) that can be used for sizing nanoparticles suspended in gaseous media. Experimental measurements of the penetration of nanoparticles having diameters down to ca 1nm through the HP-EMF are compared with predictions by an analytic, a semi-empirical and a numerical model...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28446346/engineering-nanosized-organosilica-for-molecular-recognition-and-biocatalysis-applications
#6
M Rita Correro, Yves Dudal, Philippe F-X Corvini, Patrick Shahgaldian
A series of synthetic nanomaterials capable of molecular recognition and/or biocatalysis have been produced by exploiting the self-sorting, self-assembly and polycondensation of organosilane building blocks around protein templates. The established methodology allows for the production of thin organosilica layers of controlled thickness, down to nanometer precision. Fully synthetic virus recognition materials have been shown to specifically bind their target virus down to picomolar concentrations. The shielding of natural enzymes allowed producing nanobiocatalysts functioning under harsh operational conditions...
April 26, 2017: Chimia
https://www.readbyqxmd.com/read/28446250/nanoparticles-based-on-essential-metals-and-their-phytotoxicity
#7
REVIEW
Branislav Ruttkay-Nedecky, Olga Krystofova, Lukas Nejdl, Vojtech Adam
Nanomaterials in agriculture are becoming popular due to the impressive advantages of these particles. However, their bioavailability and toxicity are key features for their massive employment. Herein, we comprehensively summarize the latest findings on the phytotoxicity of nanomaterial products based on essential metals used in plant protection. The metal nanoparticles (NPs) synthesized from essential metals belong to the most commonly manufactured types of nanomaterials since they have unique physical and chemical properties and are used in agricultural and biotechnological applications, which are discussed...
April 26, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28444473/contrasting-effects-of-engineered-carbon-nanotubes-on-plants-a-review
#8
Meththika Vithanage, Mihiri Seneviratne, Mahtab Ahmad, Binoy Sarkar, Yong Sik Ok
Rapid surge of interest for carbon nanotube (CNT) in the last decade has made it an imperative member of nanomaterial family. Because of the distinctive physicochemical properties, CNTs are widely used in a number of scientific applications including plant sciences. This review mainly describes the role of CNT in plant sciences. Contradictory effects of CNT on plants physiology are reported. CNT can act as plant growth inducer causing enhanced plant dry biomass and root/shoot lengths. At the same time, CNT can cause negative effects on plants by forming reactive oxygen species in plant tissues, consequently leading to cell death...
April 25, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28443911/fabrication-of-plasmonic-au-pd-alloy-nanoparticles-for-photocatalytic-suzuki-miyaura-reactions-under-ambient-conditions
#9
Dongxu Han, Zongbi Bao, Huabin Xing, Yiwen Yang, Qilong Ren, Zhiguo Zhang
The Suzuki-Miyaura reaction is one of the most popular and efficient routes for the formation of carbon-carbon bonds in both laboratorial and industrial synthetic processes. Here, we report for the first time that a Au-Pd/TiO2 catalyst could be utilized efficiently for Suzuki-Miyaura reactions at ambient conditions under visible light with high activity and reusability. Mechanistic investigation by means of experimental methods revealed that through the strong local surface plasma resonance of Au under the visible light, the hot electrons of Au could be injected into Pd in the bimetallic nanoparticles, thus facilitating activation of the aryl halides...
April 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28443857/adhesion-contact-deformation-in-nanobridge-tests
#10
Yao Gao, San-Qiang Shi, Tong-Yi Zhang
An accurate grasp of the mechanical properties, especially Young's moduli, of one dimensional nanomaterials plays a crucial role in the design and safe service of flexible electronic devices and implanted biomedical sensors. Nanobridge tests are widely used in the characterization of the mechanical properties of nanowires. In these tests, an atomic force microscope (AFM), functioning as a test machine, exerts a force to bend a nanowire suspended across a trench or a hole with the two ends fixed on a template or substrate...
April 26, 2017: Nanoscale
https://www.readbyqxmd.com/read/28443660/assessing-the-risk-of-engineered-nanomaterials-in-the-environment-development-and-application-of-the-nanofate-model
#11
Kendra L Garner, Sangwon Suh, Arturo A Keller
We developed a dynamic multimedia fate and transport model (nanoFate) to predict the time-dependent accumulation of metallic engineered nanomaterials (ENMs) across environmental media. nanoFate considers a wider range of processes and environmental sub-compartments than most previous models and considers ENM releases to compartments (e.g. urban, agriculture) in a manner that reflects their different patterns of use and disposal. As an example, we simulated ten years of release of nano CeO2, CuO, TiO2, and ZnO in the San Francisco Bay area...
April 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28443642/holey-two-dimensional-transition-metal-oxide-nanosheets-for-efficient-energy-storage
#12
Lele Peng, Pan Xiong, Lu Ma, Yifei Yuan, Yue Zhu, Dahong Chen, Xiangyi Luo, Jun Lu, Khalil Amine, Guihua Yu
Transition metal oxide nanomaterials are promising electrodes for alkali-ion batteries owing to their distinct reaction mechanism, abundant active sites and shortened ion diffusion distance. However, detailed conversion reaction processes in terms of the oxidation state evolution and chemical/mechanical stability of the electrodes are still poorly understood. Herein we explore a general synthetic strategy for versatile synthesis of various holey transition metal oxide nanosheets with adjustable hole sizes that enable greatly enhanced alkali-ion storage properties...
April 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28443337/inhaled-nanoparticles-accumulate-at-sites-of-vascular-disease
#13
Mark R Miller, Jennifer B Raftis, Jeremy P Langrish, Steven G McLean, Pawitrabhorn Samutrtai, Shea P Connell, Simon Wilson, Alex T Vesey, Paul H B Fokkens, A John F Boere, Petra Krystek, Colin J Campbell, Patrick W F Hadoke, Ken Donaldson, Flemming R Cassee, David E Newby, Rodger Duffin, Nicholas L Mills
The development of engineered nanomaterials is growing exponentially, despite concerns over their potential similarities to environmental nanoparticles that are associated with significant cardiorespiratory morbidity and mortality. The mechanisms through which inhalation of nanoparticles could trigger acute cardiovascular events are emerging, but a fundamental unanswered question remains: Do inhaled nanoparticles translocate from the lung in man and directly contribute to the pathogenesis of cardiovascular disease? In complementary clinical and experimental studies, we used gold nanoparticles to evaluate particle translocation, permitting detection by high-resolution inductively coupled mass spectrometry and Raman microscopy...
April 26, 2017: ACS Nano
https://www.readbyqxmd.com/read/28442907/synthesis-of-magnetic-molecularly-imprinted-polymers-with-excellent-biocompatibility-for-the-selective-separation-and-inhibition-of-testosterone-in-prostate-cancer-cells
#14
Xiaoshuang Tang, Feng Li, Jing Jia, Chao Yang, Wei Liu, Ben Jin, Xinyang Wang, Ruixia Gao, Dalin He, Peng Guo
PURPOSE: Androgen plays an important role in the progression of prostate cancer. In the present study, novel magnetic molecularly imprinted polymers (MMIPs) with good biocompatibility were produced for the selective separation and inhibition of testosterone in prostate cancer cells. MATERIALS AND METHODS: MMIPs were prepared by using magnetic nanospheres, gelatin, and testosterone as the supporting materials, functional monomer, and the template molecule, respectively...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28441910/mechanical-features-of-various-silkworm-crystalline-considering-hydration-effect-via-molecular-dynamics-simulations
#15
Yoonjung Kim, Myeongsang Lee, Hyunsung Choi, Inchul Baek, Jae In Kim, Sungsoo Na
Silk materials are receiving significant attention as base materials for various functional nanomaterials and nanodevices, due to its exceptionally high mechanical properties, biocompatibility, and degradable characteristics. Although crystalline silk regions are composed of various repetitive motifs with differing amino acid sequences, how the effect of humidity works differently on each of the motifs and their structural characteristics remains unclear. We report molecular dynamics (MD) simulations on various silkworm fibroins composed of major motifs (i...
April 25, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28441862/spatial-temporal-dispersion-of-aerosolized-nanoparticles-during-the-use-of-consumer-spray-products-and-estimates-of-inhalation-exposure
#16
Jihoon Park, Seunghon Ham, Miyeon Jang, Jinho Lee, Sunju Kim, Sungkyoon Kim, Kiyoung Lee, Donguk Park, Jung-Taek Kwon, Hyunmi Kim, Pilje Kim, Kyunghee Choi, Chungsik Yoon
We evaluated the spatial-temporal dispersion of airborne nanomaterials during the use of spray consumer products and estimated the level of consumer inhalation exposure. A total of eight spray products including five propellant and three pump types were selected to evaluate the dispersion of airborne nanoparticles across time and space in a cleanroom which could control the background particles. Four products were advertised to contain silver and one contained titanium nanoparticles, while three products were specified no ENM but as being manufactured through the use of nanotechnology...
April 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28441729/the-influence-of-hydroxyapatite-nanoparticle-morphology-on-embryonic-development-in-a-zebrafish-exposure-model
#17
Shiuli Pujari-Palmer, Xi Lu, Marjam Karlsson Ott
Nanomaterials are used in many different industries such as cosmetics, food, clothing, and electronics. There is increasing concern that exposure to nanoparticles (NPs) during pregnancy can adversely affect fetal development. It is well known that the size, charge, and chemistry of a nanoparticle can modulate embryological development. The role that particle morphology plays on early development, however, is still widely unknown. The present study aims to investigate the effect of hydroxyapatite nanoparticle (HANP) morphology on embryological development in a zebrafish exposure model...
April 22, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28441712/virus-based-devices-prospects-for-allopoiesis
#18
Bogdan Dragnea
The assembly line is a commonly invoked example of allopoiesis, the process whereby a system produces a different system than itself. In this sense, virus production in plants is an instance of bio-enabled bottom-up allopoiesis because the plant host can be regarded as a programmable assembly line for the virus. Reprogramming this assembly line and integrating it into a larger lineup of chemical manipulations has seen a flurry of activity recently, with more sophisticated systems emerging every year. The field of virus nanomaterials now has several subdisciplines that focus on virus shells as assemblers, scaffolds for molecular circuitry, chemical reactors, magnetic and photonic beacons, and therapeutic carriers...
April 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28441607/toxicity-assessment-of-zno-decorated-au-nanoparticles-in-the-mediterranean-clam-ruditapes-decussatus
#19
Badreddine Sellami, Amine Mezni, Abdelhafidh Khazri, Imen Bouzidi, Wiem Saidani, David Sheehan, Hamouda Beyrem
The synthesis of hybrid nanomaterials has greatly increased in recent years due to their special physical and chemical properties. However, information regarding the environmental toxicity associated with these chemicals is limited, in particular in the aquatic environment. In the present study, an experiment was performed in which the marine bivalve (Ruditapes decussatus) was exposed for 14days to 2 concentrations of zinc oxide-decorated Au nanoparticles (Au-ZnONPs: Au-ZnONP50=50μg/L; Au-ZnONP100=100μg/L)...
April 15, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28441474/dendrimer-modified-mos2-nanoflakes-as-a-platform-for-combinational-gene-silencing-and-photothermal-therapy-of-tumors
#20
Lingdan Kong, Lingxi Xing, Benqing Zhou, Lianfang Du, Xiangyang Shi
Exploitation of novel hybrid nanomaterials for combinational tumor therapy is challenging. In this work, we synthesized dendrimer-modified MoS2 nanoflakes for combinational gene silencing and photothermal therapy (PTT) of cancer cells. Hydrothermally synthesized MoS2 nanoflakes were modified with generation 5 (G5) poly(amidoamine) dendrimers partially functionalized with lipoic acid via disulfide bond. The formed G5-MoS2 nanoflakes display good colloidal stability and superior photothermal conversion efficiency and photothermal stability...
April 25, 2017: ACS Applied Materials & Interfaces
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"