Freezing of water droplets on silicon surfaces coated with various silanes

Suzuki, Shunsuke; Nakajima, Akira; Yoshida, Naoya; Sakai, Munetoshi; Hashimoto, Ayako; Kameshima, Yoshikazu; Okada, Kiyoshi

doi:10.1016/j.cplett.2007.07.066

Cited by 70 publications

(80 citation statements)

References 22 publications

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“…The experimental results appear to rule out most of the earlier proposed hypotheses for the contact freezing mechanism, since there was no transient contact event during the experiments and contact freezing was in operation during many freezing cycles. Suzuki et al (2007a) used a high-speed camera to observe the freezing behavior of a water droplet on silicon surfaces treated with various silanes. Freezing was observed to preferably occur from the threephase solid-liquid-air contact line.…”

Section: Discussionmentioning

confidence: 99%

Freezing of water droplets colliding with kaolinite particles

et al. 2009

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Abstract. Contact freezing of single supercooled water droplets colliding with kaolinite dust particles has been investigated. The experiments were performed with droplets levitated in an electrodynamic balance at temperatures from 240 to 268 K. Under relatively dry conditions (when no water vapor was added) freezing was observed to occur below 249 K, while a freezing threshold of 267 K was observed when water vapor was added to the air in the chamber.The effect of relative humidity is attributed to an influence on the contact freezing process for the kaolinite-water droplet system, and it is not related to the lifetime of the droplets in the electrodynamic balance. Freezing probabilities per collision were derived assuming that collisions at the lowest temperature employed had a probability of unity. Mechanisms for contact freezing are briefly discussed.

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Section: Discussionmentioning

confidence: 99%

Freezing of water droplets colliding with kaolinite particles

et al. 2009

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“…At this line three phases meet, and so it is called a three-phase line. It has been found that nucleation can occur along this line 13,14,[22][23][24][25] in preference to in the bulk of the liquid or at either the water/vapour or water/solid interfaces.…”

Section: Contact Nucleationmentioning

confidence: 99%

“…Suzuki et al found that the temperature at which nucleation occurs at the contact line varies with contact angle, but that the dependence is not a simple monotonic function of contact angle 24 . They also found that nucleation occurs at higher temperatures on rougher, more heterogeneous surfaces 25 .…”

Section: Contact Nucleationmentioning

confidence: 99%

The non-classical nucleation of crystals: microscopic mechanisms and applications to molecular crystals, ice and calcium carbonate

Sear

2012

International Materials Reviews

206

219

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Crystals form via nucleation followed by growth. Often nucleation data is interpreted using the classical theory of nucleation, which is essentially a simple theory for the nucleation of a fluid phase. I characterise this classical theory as making six assumptions; I discuss each assumption in turn. I then review experiments and simulations that find nucleation behaviour that cannot be described by the classical theory. The experiments are on the crystallisation from solution of molecules such as drugs and related molecules, ice and calcium carbonate. The review also covers work on non-classical nucleation in solutions of the protein lysozyme, and work on the fascinating phenomenon of nucleation induced by laser pulses. I hope this review will be of interest to those studying the crystallisation of both molecules and ions from solution. The review aims to advance our understanding of the crucial first step in crystallisation, and to enable researchers studying crystallisation in one system to learn from what others have done in studying analogous phenomena in different systems.

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“…Using an improved and modified version of a cold stage (Suzuki et al, 2007) to avoid the point-like contact (i.e., the contact between the drop and the IN) and to minimize the temperature variation on the water drop surface, the preferred location to nucleate an ice crystal was investigated on silicon wafers. Gurganus et al (2011) tested 189 drops and found that there is no preference to form the ice germ at the 3-phase boundary (surfacedroplet-air) or 3-phase contact line over the 2-phase contact area.…”

Section: Three-phase Contactmentioning

confidence: 99%

Contact freezing: a review of experimental studies

2013

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Abstract. This manuscript compiles both theoretical and experimental information on contact freezing with the aim to better understand this potentially important but still not well quantified heterogeneous freezing mode. There is no complete theory that describes contact freezing and how the energy barrier has to be overcome to nucleate an ice crystal by contact freezing. Experiments on contact freezing conducted using the cold plate technique indicate that it can initiate ice formation at warmer temperatures than immersion freezing. Additionally, a qualitative difference in the freezing temperatures between contact and immersion freezing has been found using different instrumentation and different ice nuclei. There is a lack of data on collision rates in most of the reported data, which inhibits a quantitative calculation of the freezing efficiencies. Thus, new or modified instrumentation to study contact nucleation in the laboratory and in the field are needed to identify the conditions at which contact nucleation could occur in the atmosphere. Important questions concerning contact freezing and its potential role for ice cloud formation and climate are also summarized.

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Freezing of water droplets on silicon surfaces coated with various silanes

Cited by 70 publications

References 22 publications

Freezing of water droplets colliding with kaolinite particles

Freezing of water droplets colliding with kaolinite particles

The non-classical nucleation of crystals: microscopic mechanisms and applications to molecular crystals, ice and calcium carbonate

Contact freezing: a review of experimental studies

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