Ligand-Mediated Nanocluster Formation with Classical and Autocatalytic Growth

2019 ◽  
Vol 123 (49) ◽  
pp. 29954-29963
Author(s):  
Mohsen Farshad ◽  
Dylan Suvlu ◽  
Jayendran C. Rasaiah
Keyword(s):  
Autocatalytic Growth

A Review of Root Causes of SCC Phenomena in BWR/RBMK: Issues, Approaches, and Proposals

2004 ◽  
Author(s):  
Genn Saji
Keyword(s):  
Current Approach ◽  
Long Distance ◽  
Electric Conductor ◽  
Soil Corrosion ◽  
Electrolytic Corrosion ◽  
Radiation Induced ◽  
Hypothetical Mechanism ◽  
Local Cell ◽  
Corrosive Environments ◽  
Autocatalytic Growth

The author looked for potential mechanisms deemed insignificant in the early stages of SCC research and the current approach used in SCC studies were selected. The basis for those mechanisms was in non-nuclear corrosive environments as well as analyses of redox potential data measured under radiation. Three possible mechanisms were identified; ‘long cell action (which suppresses local cell cathodic activities and accelerates remote local cell anodic activities),’ ‘autocatalytic growth of cracks in crevice water chemistry,’ and ‘transpassive corrosion of stainless steel.’ The ‘long cell action’ has been identified as a key mechanism of soil corrosion which is induced by a difference in the availability of oxygen inside the soil. In this mechanism, conduction of electrons through an electric conductor over a long distance plays a significant role. This author proposes a hypothetical mechanism that states; ‘radiation-induced ‘long cell action’ causing electrolytic corrosion.’

scholarly journals A Labile Metallo-Porphyrin as Tool to Control J-Aggregates Chiroptical Properties

2020 ◽  
Author(s):  
Luigi Monsù Scolaro ◽  
Ilaria Occhiuto ◽  
Mariachiara Trapani ◽  
ROBERTO ZAGAMI ◽  
Andrea Romeo ◽  
...  
Keyword(s):  
Dipolar Coupling ◽  
Initial Conditions ◽  
Coupling Mechanism ◽  
Precise Control ◽  
Rate Determining Step ◽  
Initial Nucleus ◽  
Acidic Conditions ◽  
J Aggregates ◽  
Kinetics Of ◽  
Autocatalytic Growth

The zinc(II) metal derivative of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS4) is quite labile and readily demetallates under acidic conditions, affording the parent diacid porphyrin in a monomeric form. The rate of this process is first order on [ZnTPPS4] and second order on [H+], allowing a precise control of the monomer release in solution. Under high ionic strength, this latter species is able to self-assemble into J-aggregates, whose kinetics of growth are largely modulated by pH. The aggregation kinetics have been treated according to a well-established model, in which the formation of an initial nucleus is the rate determining step preceding the autocatalytic growth of the whole assembly. The extinction spectra of the aggregates suggest the occurrence of a dipolar coupling mechanism very similar to that operating in metal nanoparticles. Spontaneous symmetry breaking takes place in these aggregates as evidenced by unusual circular dichroism spectra. The intensity and sign of the effect is controlled by the aggregation rate and therefore can be tuned through a proper choice of initial conditions.

scholarly journals Nucleation and growth of gold nanoparticles initiated by nanosecond and femtosecond laser irradiation of aqueous [AuCl4]−

2018 ◽  
Vol 20 (45) ◽  
pp. 28465-28475 ◽  
Author(s):  
Collin J. Rodrigues ◽  
Julian A. Bobb ◽  
Mallory G. John ◽  
Sergey P. Fisenko ◽  
M. Samy El-Shall ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Surface Plasmon ◽  
Au Nanoparticles ◽  
Nucleation And Growth ◽  
Femtosecond Laser Irradiation ◽  
532 Nm ◽  
Polydisperse Particles ◽  
Autocatalytic Growth

Irradiation of aqueous [AuCl4]− with 532 nm, 8 ns pulses produces uniform 5 nm Au nanoparticles through surface plasmon-mediated photothermal autocatalytic growth, in contrast to the large polydisperse particles formed with 800 nm, 30 fs pulses.

scholarly journals Gravimetric analysis of the autocatalytic growth of copper microparticles in aqueous solution

RSC Advances ◽  
2019 ◽  
Vol 9 (65) ◽  
pp. 37895-37900
Author(s):  
Jinuk Byun ◽  
Kwang Hawn Kim ◽  
Byung Keun Kim ◽  
Ji Woong Chang ◽  
Sung Ki Cho ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Growth Kinetics ◽  
Gravimetric Method ◽  
Gravimetric Analysis ◽  
Kinetics Of ◽  
Autocatalytic Growth

The growth kinetics of copper microparticles was analysed by using the gravimetric method.

Fractal models for the autocatalytic growth of amorphous thin films

1989 ◽  
Vol 66 (1) ◽  
pp. 146-151 ◽  
Author(s):  
Xiao‐dan Pan ◽  
Andras Szasz ◽  
Derek J. Fabian
Keyword(s):  
Thin Films ◽  
Amorphous Thin Films ◽  
Fractal Models ◽  
Autocatalytic Growth

The Kinetic Rate Law for the Autocatalytic Growth of Citrate-Stabilized Silver Nanoparticles

2015 ◽  
Vol 47 (6) ◽  
pp. 351-360 ◽  
Author(s):  
Andriy Kytsya ◽  
Liliya Bazylyak ◽  
Yuriy Hrynda ◽  
Andriy Horechyy ◽  
Yuriy Medvedevdkikh
Keyword(s):  
Silver Nanoparticles ◽  
Kinetic Rate ◽  
Rate Law ◽  
Autocatalytic Growth

scholarly journals Ligand Mediated Nanocluster Formation with Classical and Autocatalytic Growth

2019 ◽  
Author(s):  
Mohsen Farshad ◽  
Dylan Suvlu ◽  
Jayendran C. Rasaiah
Keyword(s):  
Kinetic Model ◽  
Optimal Conditions ◽  
Bottom Up ◽  
Autocatalytic Growth

We describe a kinetic model of ligand-mediated nanocluster (diameter < 2 nm) formation. We investigate two growth pathways: classical single-monomer addition, and autocatalytic growth. We compare our results to some relevant experiments and we discuss and generally describe the optimal conditions for "bottom up" nanocluster synthesis.<br>

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