Controlled ON/OFF stereocomplexation of dynamic helical polymer-metal nanoparticle nanocomposites─poly(phenylacetylene)-MNP nanocomposites (M = Au or Ag)─is presented. These novel hybrid materials can be found either as well-dispersed metal nanoparticles (MNPs) (stereocomplex OFF) fiber-like aggregates ON) with the distributed along material. A stereocomplex-MNP nanocomposite is formed by inter...

In this work, we report synthesis of silver nanoplates by a simple reduction process of silver nitrate in the presence of polyvinyl alcohol (PVA) and N,N'-dimethyl formamide (DMF). The Characterization of the samples were carried out using X-ray diffraction (XRD), Transmission-electron microscopy (TEM) and UV-vis spectroscopy. Absorption spectra of the nanoplates in comparison with that of the ...

background and objectives according to islamic doctrines, the use of gold for men has been banned. in general, any advised subject in islam is useful for the body and what has definitely forbidden for a man is definitely harmful for him although its reasons have not been exactly specified. however, muslims believe that there is certainly a sound reason behind this prohibition. this issue was st...

The bio-barcode amplification assay has become a powerful tool in detecting tens to hundreds of biological targets such as proteins and nucleic acids in the entire sample. However, current bio-barcode detection schemes still require many experimental steps including microarrayer-based immobilization of oligonucleotides on a glass chip, silver enhancement of immobilized gold nanoparticles on a c...

The use of gold nanoparticle as an anti-infective agent has been proposed for years[1]. However, many reports mention for its ability counteracting bacteria. Its property against virus has never been systematically evaluated. Here, the authors performed a preliminary in vitro study to assess the effect of gold nanoparticle on viral load of hepatitis C virus (HCV). The standard gold nanoparticle...

Extended Abstract Deposition of metallic nanostructures on an optically transparent substrate is an important process step in the fabrication of localized surface plasmon biosensors. Various methods of deposition of nanostructures on substrates are thermal and e-beam deposition or sputtering and heat treatment, selfassembly through convective process, etc. (Alet et al., 2008; Szunerits et al., ...

BACKGROUND Multidrug resistant microorganisms are a growing challenge and new substances that can be useful to treat infections due to these microorganisms are needed. Silver nanoparticle may be a future option for treatment of these infections, however, the methods described in vitro to evaluate the inhibitory effect are controversial. RESULTS This study evaluated the in vitro activity of si...

BACKGROUND In medicine, there is limited knowledge on the toxicity of nanoparticles. In medicine, there has been limited knowledge on the effect of nanoparticles on the white blood cell. OBJECTIVE To evaluate the effect of gold nanoparticle on the microscopic morphology of white blood cell. SETTING Chulalongkorn Univesity, Bangkok, Thailand. METHOD This study was performed as an experimen...

The superatom model for nanoparticle structure is shown to be inadequate for the prediction of the thermodynamic stability of gold nanoparticles. The observed large HOMO-LUMO gaps for stable nanoparticles predicted by this model are, for sulfur-stabilized gold nanoparticles, attributed to covalent interactions of the metal with thiyl adsorbate radicals rather than ionic interactions with thiola...