Results 231 to 240 of about 60,710 (268)

Enzymes as bionanoreactors: glucose oxidase for the synthesis of catalytic Au nanoparticles and Au nanoparticle–polyaniline nanocomposites

J. Mater. Chem. B, 2014
Biogenic synthesis of Au nanoparticles and Au nanoparticle–polyaniline composite could be accomplished taking advantage of the reducing and catalytic activity of glucose oxidase.
Bhagwati, Sharma, Sonam, Mandani, Tridib K, Sarma   +2 more
openaire   +2 more sources

Tug-of-War in Nanoparticles: Competitive Growth of Au on Au−Fe₃O₄ Nanoparticles

Nano Letters, 2009
Mechanical property of dumbbell-like Au-Fe(3)O(4) nanoparticles (NPs) is investigated from a synthetic point of view by overgrowing Au(2) on the Au(1)-Fe(3)O(4) NPs. The competitive growth of Au(2) on the preformed Au(1)-Fe(3)O(4) NPs induced an interesting "tug-of-war" between Au(2) and Fe(3)O(4) in the formed Au(2)-Au(1)-Fe(3)O(4) ternary ...
Chao, Wang, Yujie, Wei, Hongyuan, Jiang, Shouheng, Sun   +3 more
openaire   +2 more sources

Sputtering of nanoparticles: Molecular dynamics study of Au impact on 20nm sized Au nanoparticles

International Journal of Mass Spectrometry, 2008
Abstract Using molecular dynamics simulation we study the sputtering of Au nanoparticles (diameter 20 nm) by 16 and 64 keV Au projectiles. The sputter yield is more than a factor of two larger than for sputtering of a planar target. This feature is connected to a reduced projectile range in the nanoparticle, which leads to shallow energy deposition ...
Steffen Zimmermann, Herbert M. Urbassek
openaire   +1 more source

Au nanoparticles target cancer

Nano Today, 2007
Nanoparticles with unique optical properties, facile surface chemistry, and appropriate size scale are generating much enthusiasm in molecular biology and medicine. Noble metal, especially Au, nanoparticles have immense potential for cancer diagnosis and therapy on account of their surface plasmon resonance (SPR) enhanced light scattering and ...
Prashant K. Jain, Ivan H. El-Sayed, Mostafa A. El-Sayed   +2 more
openaire   +1 more source

Catalytic activity of Au nanoparticles

Nano Today, 2007
Au is usually viewed as an inert metal, but surprisingly it has been found that Au nanoparticles less than 3–5 nm in diameter are catalytically active for several chemical reactions. We discuss the origin of this effect, focusing on the way in which the chemical activity of Au may change with particle size.
Britt Hvolbæk, Ton V.W. Janssens, Bjerne S. Clausen, Hanne Falsig, Claus H. Christensen, Jens K. Nørskov   +5 more
openaire   +1 more source

Au nanoparticles coated with chitosan

Colloid and Polymer Science, 2019
This paper describes a method of coating metallic gold (Au) nanoparticles with chitosan (CS) shells in an aqueous solution. A colloidal solution of Au nanoparticles with a particle size of 16.5 ± 1.7 nm was prepared by reducing the Au ions (III) with sodium citrate in water at 80 °C.
Akitoshi Tokumasu, Tomoya Inose, Noriko Yamauchi, Kouichi Nakashima, Masayuki Tokunaga, Chihiro Kato, Keiichiro Hatoyama, Takashi Kamei, Kohsuke Gonda, Yoshio Kobayashi   +9 more
openaire   +1 more source

Advances in the catalysis of Au nanoparticles

Applied Catalysis A: General, 2001
Abstract Gold catalysts have recently been attracting rapidly growing interests due to their potential applicabilities to many reactions of both industrial and environmental importance. This article reviews the latest advances in the catalysis research on Au. For low-temperature CO oxidation mechanistic arguments are summarized, focusing on Au/TiO 2
Masatake Haruta, Masakazu Daté
openaire   +1 more source

Dewetting of Au nanoparticle assemblies

Journal of Materials Chemistry, 2011
Atomic force microscopy measurements as a function of annealing temperature, time of exposure to a high relative humidity environment, and scan duration/parameters have been used to ascertain the stability of assemblies of thiol-passivated Au nanoparticles on silicon substrates. Striking changes in the morphology of self-organised nanoparticle patterns
Alhummiany, Haya, Jarvis, Samuel, Woolley, Richard A. J., Stannard, Andrew, Blunt, Matthew, Moriarty, Philip   +5 more
openaire   +1 more source

Surface magnetism of Au nanoparticles

Journal of Magnetism and Magnetic Materials, 2007
We demonstrate ab initio calculation of electronic structure in Au ultrathin slabs and nanoparticles. The ferromagnetism is not favorable to Au surfaces because the magnetic moments are very small for the surface atoms. However, the d electron states shifts toward the Fermi level for the slab and particle structures. In particular, the d states appears
M. Nawate, H. Tanaka, S. Honda
openaire   +1 more source

Electromagnetically Coupled Au Nanoparticles

2021 IEEE 26th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED), 2021
The current intense interest in the properties of gold nanoparticles for their applications in antenna design, optical sensing, optical quality control, biotechnology and medical diagnostics is currently based on their resonantly enhanced scattering properties.
openaire   +1 more source