Effect of Particle Size on the Ice Nucleating Ability of AgIAgBrCuI System

Palanisamy, M.; Thangaraj, Kumarasamy; Gobinathan, R.; Ramasamy, P.

doi:10.1002/crat.2170210709

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…For an effective cloud seeding operation, the size of the material is one of the important factors in the measurement of its nucleation temperature (GOBINATHAN, RAMASAMY 1985); PALANISAMY et al 1986b). Hence, throughout the investigations, uniform sized particles (50 pm) have been used.…”

Section: Discussionmentioning

confidence: 99%

Synthesis of AgIAgClCuI solid solutions for ice nucleation studies

Sivanesan

Gobinathan

1990

Cryst. Res. Technol.

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Lattice parameter calculation and the nucleation temperature of AgI-AgC1-CuI system are reported in this study. By vacuum fusion three samples of different molar compositions were prepared. The formation of the cubic solid solution of the above system was confirmed by X-ray analysis. It is found that the 50: 25: 25 mole% composition of AgI-AgC1-CuI has the highest nucleation temperature of -1.0 "C, which is far greater than -2.53 "C, -4.02 "C and -2.26 "C for pure AgI, AgCl, and CuI, respectively.

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Section: Discussionmentioning

confidence: 99%

Synthesis of AgIAgClCuI solid solutions for ice nucleation studies

Sivanesan

Gobinathan

1990

Cryst. Res. Technol.

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“…The ability to influence and modify cloud microstructure in certain simple cloud systems such as fog and simple orographic clouds has been demonstrated in observational studies (Bruintjes, 1999). Nevertheless, the general impact of glaciogenic seeding is still uncertain since it is a challenge to detect a signal from seeding in the noisy pattern of precipitation (Pokharel et al, 2014). Cloud seeding strategies have been established for seeding of cold clouds.…”

Section: Weather Modification By Cloud Seedingmentioning

confidence: 99%

Review of manuscript acp-2016-142

2016

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AgI is one of the best-investigated ice-nucleating substances. It has relevance for the atmosphere since it is used for glaciogenic cloud seeding. Theoretical and experimental studies over the last 60 years provide a complex picture of silver iodide as an ice-nucleating agent with conflicting and inconsistent results. This review compares experimental ice nucleation studies in order to analyze the factors that influence the ice nucleation ability of AgI. The following picture emerges from this analysis: the ice nucleation ability of AgI seems to be enhanced when the AgI particle is on the surface of a droplet, which is indeed the position that a particle takes when it can freely move in a droplet. The ice nucleation by particles with surfaces exposed to air depends on water adsorption. AgI surfaces seem to be most efficient at nucleating ice when they are exposed to relative humidity at or even above water saturation. For AgI particles that are completely immersed in water, the freezing temperature increases with increasing AgI surface area. Higher threshold freezing temperatures seem to correlate with improved lattice matches as can be seen for AgI-AgCl solid solutions and 3AgI q NH 4 I q 6H 2 O, which have slightly better lattice matches with ice than AgI and also higher threshold freezing temperatures. However, the effect of a good lattice match is annihilated when the surfaces have charges. Also, the ice nucleation ability seems to decrease during dissolution of AgI particles. This introduces an additional history and time dependence for ice nucleation in cloud chambers with short residence times.

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Synthesis and X-ray diffraction analysis of AgI-CuBr solid solutions for ice nucleation

Sivanesan

Gobinathan

1990

J Mater Sci Lett

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Effect of Particle Size on the Ice Nucleating Ability of AgIAgBrCuI System

Cited by 5 publications

References 25 publications

Synthesis of AgIAgClCuI solid solutions for ice nucleation studies

Synthesis of AgIAgClCuI solid solutions for ice nucleation studies

Review of manuscript acp-2016-142

Synthesis and X-ray diffraction analysis of AgI-CuBr solid solutions for ice nucleation

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