نتایج جستجو برای: surface modified nanoparticle

تعداد نتایج: 887611  

Journal: :Molecules 2014
Alina Georgiana Anghel Alexandru Mihai Grumezescu Mariana Chirea Valentina Grumezescu Gabriel Socol Florin Iordache Alexandra Elena Oprea Ion Anghel Alina Maria Holban

Cinnamomum verum-functionalized Fe3O4 nanoparticles of 9.4 nm in size were laser transferred by matrix assisted pulsed laser evaporation (MAPLE) technique onto gastrostomy tubes (G-tubes) for antibacterial activity evaluation toward Gram positive and Gram negative microbial colonization. X-ray diffraction analysis of the nanoparticle powder showed a polycrystalline magnetite structure, whereas ...

2017
Ping Sun Wei Huang Lin Kang Mingji Jin Bo Fan Hongyan Jin Qi-Ming Wang Zhonggao Gao

An ideal carrier that delivers small interfering RNA (siRNA) should be designed based on two criteria: cellular-mediated internalization and endosomal escape. Poly(histidine-arginine)6(H6R6) peptide was introduced into chitosan (CS) to create a new CS derivative for siRNA delivery, 6-polyarginine (R6) as cell-penetrating peptides facilitated nanoparticle cellular internalization has been proved...

Journal: :International Journal for Research in Applied Science and Engineering Technology 2019

Journal: :The Journal of chemical physics 2015
Stephen J Cox Shawn M Kathmann Ben Slater Angelos Michaelides

Ice formation is one of the most common and important processes on earth and almost always occurs at the surface of a material. A basic understanding of how the physicochemical properties of a material's surface affect its ability to form ice has remained elusive. Here, we use molecular dynamics simulations to directly probe heterogeneous ice nucleation at a hexagonal surface of a nanoparticle ...

Journal: :iranian journal of toxicology 0
احمد کاکایی ahmad kakaei ms student of chemical engineering, islamic azad university, south-tehran branch, tehran, iran. محمد کاظمینی mohammad kazemeini department of chemical engineering, sharif university of technology, islamic azad university, south-tehran branch, tehran, iran.

background: heavy metals, even at low concentrations, are harmful to human health and environment. cadmium as a heavy metal is highly toxic and can cause serious threat to living organisms. this research was designed to evaluate the adsorption potential of modified magnetic iron nanoparticles by 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol ligand for the removal of cadmium ions from water solu...

Journal: :international journal of nanoscience and nanotechnology 2012
t. matsuura m. a. aroon a. f. ismail

in this paper, synthesized (raw) multi-walled carbon nanotube (rmwcnts) surfaces were modified with chitosan and β-cyclodextrin using chen’s soft cutting technique. raw and surface modified multi-walled carbon nanotubes were observed by transmission electron microscope (tem). the results showed that chitosan and β-cyclodextrin could attach to the outer surface of nanotubes, wrapping the nanotub...

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

metal nanoshells consists of a dielectric core surrounded by a thin noble metal shell, possess unique optical properties that render nanoshells attractive for use in different technologies. this paper reports a facile method for growth of small gold nanoparticles on the functionalized surface of larger silica nanoparticles. mono-dispersed silica particles and gold nanoparticles were prepared by...

Journal: :The Analyst 2008
Hye Jin Lee Alastair W Wark Robert M Corn

This paper introduces a novel approach to surface bioaffinity sensing based on the adsorption of nanoparticles onto a gold diffraction grating that supports the excitation of planar surface plasmons. A surface enzymatic amplification reaction is also incorporated into the detection scheme to enhance the sensitivity and utility of the nanoparticle-enhanced diffraction grating (NEDG) sensors. As ...

Journal: :Nanoscale 2014
Alexander V Uskov Igor E Protsenko Renat S Ikhsanov Viktoriia E Babicheva Sergei V Zhukovsky Andrei V Lavrinenko Eoin P O'Reilly Hongxing Xu

We study the emission of photoelectrons from plasmonic nanoparticles into a surrounding matrix. We consider two mechanisms of electron emission from the nanoparticles--surface and volume ones--and use models for these two mechanisms which allow us to obtain analytical results for the photoelectron emission rate from a nanoparticle. Calculations have been carried out for a step potential at the ...

In this work, a TiO2 nanoparticle modified carbon ionic liquid electrode (CILE) was employed as a sensitive sensor for the investigation of the electrochemical behavior of indomethacin (IND). This nanocomposite sensor has been fabricated by incorporation of TiO2 nanoparticles and the ionic liquid 1-hexylpyridinium hexafluorophosphate (HPFP). The surface of the electrode was studied by scanning ...

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