Induced freezing of supercooled water into ice by self-assembled crystalline monolayers of amphiphilic alcohols at the air-water interface

Popovitz‐Biro, Ronit; Wang, J. L.; Majewski, Jarosław; Shavit, Edna; Leiserowitz, Leslie; Lahav, Meir

doi:10.1021/ja00083a003

Cited by 192 publications

(331 citation statements)

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“…Crystals of some sterols, for example, trigger nucleation > −5 • C, although the fungal sterol ergosterol and the plant sterol β-sitosterol were found to be inactive (Head, 1962;Fukuta and Mason, 1963). Under optimal conditions, monolayers of aliphatic alcohols can also induce ice nucleation at temperatures ranging from ≈ −14 • C for C 14 H 29 OH to just below −1 • C for C 31 H 63 OH (Gavish et al, 1990;Popovitz-Biro et al, 1994; see also Rosinski, 1980). Nucleation is facilitated by alcohols self-assembling into two-dimensional crystalline clusters on air : liquid or liquid : liquid interfaces, with their hydroxyl groups embedded into the water surface and arrayed with a spacing closely matching hexagonal ice (Gavish et al, 1990;Popovitz-Biro et al, 1991).…”

Section: Inps From Sterols and Monolayers Of Aliphatic Alcoholsmentioning

confidence: 99%

Sources of organic ice nucleating particles in soils

et al. 2016

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Abstract. Soil organic matter (SOM) may be a significant source of atmospheric ice nucleating particles (INPs), especially of those active > −15 • C. However, due to both a lack of investigations and the complexity of the SOM itself, the identities of these INPs remain unknown. To more comprehensively characterize organic INPs we tested locally representative soils in Wyoming and Colorado for total organic By contrast, lysozyme, which digests bacterial cell walls, only reduced INPs active at ≥ −7.5 or ≥ −6 • C, depending on the soil. The known IN bacteria were not detected in any soil, using PCR for the ina gene that codes for the active protein. We directly isolated and photographed two INPs from soil, using repeated cycles of freeze testing and subdivision of droplets of dilute soil suspensions; they were complex and apparently organic entities. Ice nucleation activity was not affected by digestion of Proteinase K-susceptible proteins or the removal of entities composed of fulvic and humic acids, sterols, or aliphatic alcohol monolayers. Organic INPs active colder than −10 to −12 • C were resistant to all investigations other than heat, oxidation with H 2 O 2 , and, for some, digestion with papain. They may originate from decomposing plant material, microbial biomass, and/or the humin component of the SOM. In the case of the latter then they are most likely to be a carbohydrate. Reflecting the diversity of the SOM itself, soil INPs have a range of sources which occur with differing relative abundances.

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Section: Inps From Sterols and Monolayers Of Aliphatic Alcoholsmentioning

confidence: 99%

Sources of organic ice nucleating particles in soils

et al. 2016

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“…However, the importance of lattice match was questioned thereupon because ice seems to nucleate preferentially at steps on the silver iodide surface and the hexagonal pattern only appears when the growing ice crystal has gained some size (Zettlemoyer et al, 1961). Crystals such as cadmium sulfide (CdS), quartz, indium antimonide (InSb) and barium fluoride (BaF2) are ineffective as ice nuclei despite similar lattice spacing to ice Sadtchenko et al, 2002;Conrad et al, 2005). Moreover, examples of organic ice-nucleating substances like crystalline steroids nucleate ice almost as effectively as AgI, but their crystal lattices exhibit no obvious relationship to the cell dimensions of ice (Head, 1961).…”

Section: Introductionmentioning

confidence: 99%

“…8916 C. Marcolli et al: Ice nucleation efficiency of AgI by a monolayer of long-chain alcohols forming 2-D crystals with close lattice matches to ice (Popovitz-Biro et al, 1994;Majewski et al, 1995;Cantrell and Robinson, 2006;Zobrist et al, 2007;Knopf and Forrester, 2011). Ice active proteins expressed by the bacteria Pseudomonas syringae (P. Syringae) and Erwinia herbicola, which are ice active up to 271 K, possess sites with a close fit to the ice lattice (Kajava and Lindow, 1993;Yankofsky et al, 1981;Govindarajan and Lindow, 1988;Budke and Koop, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Other properties may be a low surface charge and large polarizability of the ice-nucleating surface. Further factors are the orientation of hydrogen bonds and van der Waals interactions between the ice-nucleating structure and water molecules (Sadtchenko et al, 2002;Zielke et al, 2015). Fletcher (1959) pointed out that the molecular alignment of water molecules directed by hydrogen bonds must be favorable for the growth of further ice layers; otherwise, epitaxial ice growth is inhibited.…”

Section: Introductionmentioning

confidence: 99%

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Ice nucleation efficiency of AgI: review and new insights

et al. 2016

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Abstract. 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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“…According to GID data, monolayers with n ¼ 16 and 20 contain less crystalline material than monolayers with n ¼ 23; 30, 31 [2]. IR spectra of the same alcohol monolayers at an area per molecule of 20 Å 2 have been measured at the air/ water interface at 20 1C.…”

Section: Introductionmentioning

confidence: 99%

Phase behaviour in supported mixed monolayers of alkanols, investigated by AFM

Zdravkova

Eerden

Snel

2005

Journal of Crystal Growth

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The structure of mixed Langmuir-Blodgett monolayers of fatty alcohols, C n H 2n+1 OH with even n ¼ 16-24, was investigated by AFM at 20-22 1C. Phase separation was found for compressed films, if the chain length of the two components differed at least 6 carbon atoms. A strong dependence of the domain shape on the surface pressure was observed. The excess Gibbs energy DG ex vs. surface pressure and mole fraction was calculated from p-A isotherms. In line with thermodynamic analysis, the tendency of phase separation increased with increasing DG ex : A surprising and as yet unexplained result was that we sometimes observed clear phase separation already for DG ex 4 À 0:1RT: r

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Induced freezing of supercooled water into ice by self-assembled crystalline monolayers of amphiphilic alcohols at the air-water interface

Cited by 192 publications

References 1 publication

Sources of organic ice nucleating particles in soils

Sources of organic ice nucleating particles in soils

Ice nucleation efficiency of AgI: review and new insights

Phase behaviour in supported mixed monolayers of alkanols, investigated by AFM

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