Wetting of surfaces decorated by gas-phase synthesized silver nanoparticles: Effects of Ag adatoms, nanoparticle aging, and surface mobility

2021 ◽  
Vol 155 (21) ◽  
pp. 214701
Author(s):  
Gert H. ten Brink ◽  
Xiaotian Zhu ◽  
Weiteng Guo ◽  
K. Blauw ◽  
L. Assink ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gas Phase ◽  
Surface Mobility

scholarly journals Gas phase selective propylene epoxidation over La2O3-supported cubic silver nanoparticles

2019 ◽  
Vol 9 (13) ◽  
pp. 3435-3444 ◽  
Author(s):  
Bin Yu ◽  
Tuğçe Ayvalı ◽  
Zhi-Qiang Wang ◽  
Xue-Qing Gong ◽  
Abdulaziz A. Bagabas ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gas Phase ◽  
Propylene Oxide ◽  
Atomic Oxygen ◽  
Propylene Epoxidation ◽  
Phase Oxidation ◽  
Gas Phase Oxidation ◽  
Ag Nanocube ◽  
Enhanced Selectivity

It is shown that the Ag nanocube/La2O3 interface catalyses gas phase oxidation of propylene to propylene oxide cooperatively with enhanced selectivity and conversion. Dioxygen is preferentially activated and dissociated by La2O3(001) and the active atomic oxygen over the Ag(100) facet leads to selective propylene epoxidation.

Aerosol flow in a tube furnace reactor of gas-phase synthesised silver nanoparticles

2008 ◽  
Vol 10 (S1) ◽  
pp. 153-161 ◽  
Author(s):  
D. Mitrakos ◽  
J. Jokiniemi ◽  
U. Backman ◽  
C. Housiadas
Keyword(s):  
Silver Nanoparticles ◽  
Gas Phase ◽  
Tube Furnace ◽  
Aerosol Flow

Molecular structure, optical, electrical and sensing properties of PANI-based coatings with silver nanoparticles deposited from the active gas phase

2015 ◽  
Vol 351 ◽  
pp. 811-818 ◽  
Author(s):  
A.A. Ragachev ◽  
M.A. Yarmolenko ◽  
Jiang Xiaohong ◽  
Ruiqi Shen ◽  
P.A. Luchnikov ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Silver Nanoparticles ◽  
Gas Phase ◽  
Sensing Properties

Role of Energy Dissipation and Surface Mobility in Heterogeneous Catalysis by Metals

1998 ◽  
Vol 63 (11) ◽  
pp. 1851-1868 ◽  
Author(s):  
Zlatko Knor ◽  
Jan Plšek
Keyword(s):  
Energy Dissipation ◽  
Gas Phase ◽  
Bimetallic Catalysts ◽  
Supported Catalysts ◽  
Bound State ◽  
Reaction Products ◽  
Atomic Steps ◽  
Surface Mobility ◽  
Species Mobility

The fundamental role of excess energy dissipation and of surface species mobility, both in the preparation of model metallic catalysts (bimetallic catalysts, bimetallic oxide-supported catalysts), and in the activation of reactant molecules on the catalyst surfaces (single crystals, bimetallic and bimetallic oxide-supported catalysts) are discussed. A generalized model of surface interactions is proposed which satisfactorily explains the trapping of particles from the gas phase at the atomic steps and recovery of the trapping sites due to migration of the trapped species towards flat terraces. Higher probability of encounter of these species with other reactants on flat terraces and easier desorption of the reaction products from there in comparison with the bound state at the edges of atomic steps can be expected. Results of FIM and FEM studies of Pt, Dy-W, Pd-W and Pd-Mo systems are used to illustrate selected features of the proposed general model.

Different morphologies of silver nanoparticles as catalysts for the selective oxidation of styrene in the gas phase

2004 ◽  
pp. 846-847 ◽  
Author(s):  
R. J. Chimentão ◽  
I. Kirm ◽  
F. Medina ◽  
X. Rodríguez ◽  
Y. Cesteros ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gas Phase ◽  
Selective Oxidation

Gas-phase self-assembly of uniform silica nanostructures decorated and doped with silver nanoparticles

2016 ◽  
Vol 28 (3) ◽  
pp. 035602 ◽  
Author(s):  
Chao-Shun Lai ◽  
Yi-Chen Chen ◽  
Hsiao-Fang Wang ◽  
Hsin-Chia Ho ◽  
Rong-Ming Ho ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gas Phase ◽  
Self Assembly ◽  
Silica Nanostructures

Electrostatically Directed Assembly of Silver Nanoparticles for Application to Metal Enhanced Fluorescence Biosensing

2006 ◽  
Vol 951 ◽  
Author(s):  
De-Hao Tsai ◽  
Shy-Hauh Guo ◽  
Ray J Phaneuf ◽  
Michael R. Zachariah
Keyword(s):  
Silver Nanoparticles ◽  
High Resolution ◽  
Gas Phase ◽  
Ag Nanoparticles ◽  
Size Range ◽  
Directed Assembly ◽  
Enhanced Fluorescence ◽  
Promising Tool ◽  
Device Applications ◽  
Phase Process

ABSTRACTIn this paper we demonstrate a gas-phase process to fabricate Ag nanoparticles-based bio-sensing devices. Ag nanoparticles, prepared from the gas phase through spray pyrolysis, are size-selected via electrostatic classification. These size-selected nanoparticles are then successfully attracted and aligned onto an electrostatic-patterned biased P-N junction substrate to form high- resolution nanoparticle patterns. Particles in the size range of 30-100 nm were evaluated. Our approach provides a promising tool for precise assembly of nanoparticles for future device applications.

Fundamental Studies of TiN Film Growth by CVD From Ti(N M e2)4 and Ammonia

1992 ◽  
Vol 282 ◽  
Author(s):  
J. A. Prybyla ◽  
C.-M. Chiang ◽  
L. H. Dubois
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Film Growth ◽  
High Vacuum ◽  
Reactant Ratio ◽  
Tin Films ◽  
Surface Mobility ◽  
Patterned Wafers ◽  
Elevated Pressures ◽  
Growth Properties

ABSTRACTTiN films were grown by CVD from Ti(N M e2)4 and ammonia using a novel gas delivery system which allowed the sample to be kept in high vacuum while the reactants were mixed at elevated pressures. The object was to study fundamental chemistries and growth properties. We obtained clean (<5% carbon), near-stoichiometric (Ti:N = 1.15+/-0.1) TiN films. The gas phase chemistry was studied by mass spectrometry while the films were analyzed in situ by Auger electron spectroscopy (AES), and then removed for Rutherford backscattering (RBS) analysis. Film quality was studied as a functionof reactant ratio, substrate temperature, and reactant gas pressure. We obtained definitive information on the growth mechanism. Isotopic substituiton experiments establish that a rapid transami-nation reaction occurs in the gas phase. Mass spectrometry experiments indicate that the reactive intermediate is polymeric, consisting of Ti, N, H, arid perhapscarbon. Growth on patterned wafers shows that this intermediate has a high sticking coefficient and a low surface mobility at 300°C. These findings are considered in terms ofthe potential of this precursor system to be used in manufacturing.

Encapsulated Silver Nanoparticles Can Be Directly Converted to Silver Nanoshell in the Gas Phase

Nano Letters ◽  
2015 ◽  
Vol 15 (12) ◽  
pp. 8397-8401 ◽  
Author(s):  
Peipei Yang ◽  
Yong Xu ◽  
Lei Chen ◽  
Xuchun Wang ◽  
Baohua Mao ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gas Phase

scholarly journals Fabrication of Silver Nanoparticles Using a Gas Phase Nanocluster Device and Preliminary Biological Uses

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2574 ◽  
Author(s):  
M. Mery ◽  
N. Orellana ◽  
C. Acevedo ◽  
S. Oyarzún ◽  
F. Araneda ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gas Phase ◽  
Morphological Changes ◽  
Silver Concentration ◽  
Biological Research ◽  
Average Height ◽  
Toxic Concentration ◽  
Wide Range ◽  
The Matrix ◽  
Gaussian Fit

Nanoparticles can be used in a large variety of applications, including magnetic sensing, biological, superconductivity, tissue engineering, and other fields. In this study, we explore the fabrication of gas phase silver nanoparticles using a sputtering evaporation source. This setup composed of a dual magnetron cluster source holds several advantages over other techniques. The system has independent control over the cluster concentration and a wide range of cluster size and materials that can be used for the clusters and for the matrix where it can be embedded. Characterization of these silver nanoparticles was done using transmission electron microscopy (TEM). We obtain a lateral width of 10.6 nm with a dispersion of 0.24 nm. With atomic force microscopy (AFM) a Gaussian fit of this distribution yields and average height of 6.3 nm with a standard deviation of 1.4 nm. We confirm that the deposited silver nanoparticles have a homogenous area distribution, that they have a defined shape and size distribution, and that they are single standing nanoparticles. Given that the scientific literature is not precise regarding the toxic concentration of the nanoparticles, devices such as ours can help clarify these questions. In order to explore further biological applications, we have done preliminary experiments of cell spreading (myoblast adhesion), obtaining interesting morphological changes correlated with the silver concentration on the surface. With a deposited silver concentration ranging from 100–620 ng/cm2, the cells showed morphological changes in a short time of 2 h. We conclude that this high precision nanoparticle fabrication technique is adequate for further biological research.

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