Size-dependent effect of ion bombardment on Au nanoparticles on top of various substrates: Thermodynamically dominated capillary forces versus sputtering

2009 ◽  
Vol 79 (15) ◽  
Author(s):  
A. Klimmer ◽  
P. Ziemann ◽  
J. Biskupek ◽  
U. Kaiser ◽  
M. Flesch
Keyword(s):  
Au Nanoparticles ◽  
Ion Bombardment ◽  
Capillary Forces ◽  
Dependent Effect ◽  
Size Dependent

scholarly journals Growth of ZnO nanowires catalyzed by size-dependent melting of Au nanoparticles

2009 ◽  
Vol 20 (40) ◽  
pp. 405603 ◽  
Author(s):  
Eric W Petersen ◽  
Edward M Likovich ◽  
Kasey J Russell ◽  
Venkatesh Narayanamurti
Keyword(s):  
Au Nanoparticles ◽  
Zno Nanowires ◽  
Size Dependent

Unraveling the Size-Dependent Effect of Ru-based Catalysts on Ammonia Synthesis at Mild Conditions

2021 ◽  
Author(s):  
Yanliang Zhou ◽  
Junjie Wang ◽  
Lili Liang ◽  
Qianjin Sai ◽  
Jun Ni ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Dependent Effect ◽  
Size Dependent ◽  
Mild Conditions

A test of a phenomenological model of size dependent melting in Au nanoparticles

2017 ◽  
Vol 136 ◽  
pp. 11-20 ◽  
Author(s):  
C. Dai ◽  
P. Saidi ◽  
H. Song ◽  
Z. Yao ◽  
M.R. Daymond ◽  
...  
Keyword(s):  
Phenomenological Model ◽  
Au Nanoparticles ◽  
Size Dependent

Microstructure and Optical Properties of Au–Y2O3-stabilized ZrO2 Nanocomposite Films

2005 ◽  
Vol 20 (9) ◽  
pp. 2516-2522 ◽  
Author(s):  
George Sirinakis ◽  
Rezina Siddique ◽  
Christos Monokroussos ◽  
Michael A. Carpenter ◽  
Alain E. Kaloyeros
Keyword(s):  
Optical Properties ◽  
Au Nanoparticles ◽  
Annealing Temperature ◽  
Rutherford Backscattering Spectrometry ◽  
Nanocomposite Films ◽  
Au Nanoparticle ◽  
X Ray Diffraction ◽  
Working Pressure ◽  
Optical Absorption Band ◽  
Size Dependent

Nanocomposite films consisting of gold nanoparticles embedded in an yttria stabilized zirconia (YSZ) matrix were synthesized at room temperature by radio-frequency co-sputtering from YSZ and Au targets at a 5 mTorr working pressure. The films were subsequently annealed for 2 h in 1 atm argon, with the annealing temperature varied from 600 to 1000 °C in steps of 100 °C. The composition, microstructure, and optical properties of the films were characterized as a function of annealing temperature by Rutherford backscattering spectrometry, scanning electron microscopy, Auger electron spectroscopy, x-ray diffraction, and absorption spectroscopy. An optical absorption band due to the surface plasmon resonance (SPR) of the Au nanoparticles was observed around a wavelength of 600 nm. Furthermore, the SPR band full width at half-maximum exhibited an inverse linear dependence on the radius of the Au nanoparticle, with a slope parameter A = 0.18, indicating a weak interaction between the YSZ matrix and the Au nanoparticles. The experimentally observed SPR dependence on nanoparticle size is discussed within the context of the Mie theory and its size-dependent optical constants.

Size-dependent effect of IgA on the IgA Fc receptor (CD89)

1997 ◽  
Vol 27 (9) ◽  
pp. 2219-2224 ◽  
Author(s):  
Thomas J. F. Reterink ◽  
Ger van Zandbergen ◽  
Marjolein van Egmond ◽  
Ngaisah Klar-Mohamad ◽  
Craig H. Morton ◽  
...  
Keyword(s):  
Fc Receptor ◽  
Dependent Effect ◽  
Size Dependent

scholarly journals Size-dependent dynamic structures of supported gold nanoparticles in CO oxidation reaction condition

2018 ◽  
Vol 115 (30) ◽  
pp. 7700-7705 ◽  
Author(s):  
Yang He ◽  
Jin-Cheng Liu ◽  
Langli Luo ◽  
Yang-Gang Wang ◽  
Junfa Zhu ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxidation Reaction ◽  
Au Nanoparticles ◽  
Working Condition ◽  
Ab Initio Molecular Dynamics ◽  
Present Observation ◽  
Size Dependent ◽  
Reaction Condition ◽  
Au Clusters ◽  
Co Oxidation Reaction

Gold (Au) catalysts exhibit a significant size effect, but its origin has been puzzling for a long time. It is generally believed that supported Au clusters are more or less rigid in working condition, which inevitably leads to the general speculation that the active sites are immobile. Here, by using atomic resolution in situ environmental transmission electron microscopy, we report size-dependent structure dynamics of single Au nanoparticles on ceria (CeO2) in CO oxidation reaction condition at room temperature. While large Au nanoparticles remain rigid in the catalytic working condition, ultrasmall Au clusters lose their intrinsic structures and become disordered, featuring vigorous structural rearrangements and formation of dynamic low-coordinated atoms on surface. Ab initio molecular-dynamics simulations reveal that the interaction between ultrasmall Au cluster and CO molecules leads to the dynamic structural responses, demonstrating that the shape of the catalytic particle under the working condition may totally differ from the shape under the static condition. The present observation provides insight on the origin of superior catalytic properties of ultrasmall gold clusters.

scholarly journals Biomimetic tissue models reveal the role of hyaluronan in melanoma proliferation and invasion

2020 ◽  
Vol 8 (5) ◽  
pp. 1405-1417 ◽  
Author(s):  
Jiranuwat Sapudom ◽  
Khiet-Tam Nguyen ◽  
Steve Martin ◽  
Tom Wippold ◽  
Stephanie Möller ◽  
...  
Keyword(s):  
Matrix Models ◽  
Alternative Explanation ◽  
Dependent Effect ◽  
Size Dependent ◽  
Melanoma Progression ◽  
Tissue Models ◽  
Proliferation And Invasion ◽  
Melanoma Growth

Biomimetic matrix models demonstrate the role of the size-dependent effect of hyaluronan in melanoma progression and reveal an alternative explanation for in vivo findings of hyaluronan dependent melanoma growth.

Evidence of size-dependent effect of silica micro- and nano-particles on basal and specialized monocyte functions

2017 ◽  
Vol 8 (12) ◽  
pp. 1035-1049 ◽  
Author(s):  
Mauricio C De Marzi ◽  
Martín Saraceno ◽  
Romina Mitarotonda ◽  
Marcos Todone ◽  
Marisa Fernandez ◽  
...  
Keyword(s):  
Nano Particles ◽  
Dependent Effect ◽  
Size Dependent
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