How nanoscale seed particles affect vapor-liquid nucleation

Liu, Yawei; Men, Yumei; Zhang, Xuehua

doi:10.1063/1.3658502

Cited by 20 publications

(16 citation statements)

References 47 publications

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“…Using the constrained LDFT, the transition states (critical nucleus) can be obtained. [25][26][27][28] In the constrained LDFT, a volume constraint of N 0 L = N L with N 0 L being the target number of liquid sites (the given volume of the nucleus) and N L being its actual value in our calculations was added in Eq. (1), and thus the constrained grand potential C can be written as 24,25 With ∂ C ∂ρ i = 0 and ∂ C ∂κ = 0, we get the density profile via 24,25 …”

Section: Model and Methodsmentioning

confidence: 99%

Contact line pinning and the relationship between nanobubbles and substrates

Liu

Wang

Zhang

et al. 2014

The Journal of Chemical Physics

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We report a theoretical study of nanobubble stabilization on a substrate by contact line pinning. In particular, we predict the magnitude of the pinning force required to stabilize a nanobubble and the threshold values of the pinning force that the substrate can provide. We show that the substrate chemistry and the local structures of substrate heterogeneity together determine whether or not surface nanobubbles are stable. We find that for stable nanobubbles, the contact angles are independent of substrate chemistry as its effects are cancelled out by the pinning effect. This prediction is in agreement with available experimental data.

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Section: Model and Methodsmentioning

confidence: 99%

Contact line pinning and the relationship between nanobubbles and substrates

Liu

Wang

Zhang

et al. 2014

The Journal of Chemical Physics

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“…Therefore, understanding the effect of line tension on nucleation is crucial to clarify the whole process of heterogeneous nucleation. However, since a theoretical study of line tension has been hindered by the complex mathematics and geometry, most recent studies on heterogeneous nucleation have relied on computer simulations [30][31][32][33][34] or ad hoc assumptions 35 , the predictive power of which for designing new material is limited compared to mathematically rigorous formulations.…”

Section: Line Tensionmentioning

confidence: 99%

Line-tension-induced scenario of heterogeneous nucleation on a spherical substrate and in a spherical cavity

Iwamatsu

2015

The Journal of Chemical Physics

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Line-tension-induced scenario of heterogeneous nucleation is studied for a lens-shaped nucleus with a finite contact angle nucleated on a spherical substrate and on the bottom of the wall of a spherical cavity. The effect of line tension on the free energy of a critical nucleus can be separated from the usual volume term. By comparing the free energy of a lens-shaped critical nucleus of a finite contact angle with that of a spherical nucleus, we find that a spherical nucleus may have a lower free energy than a lens-shaped nucleus when the line tension is positive and large, which is similar to the drying transition predicted by Widom [B. Widom, J. Phys. Chem. 99 2803(1995]. Then, the homogeneous nucleation rather than the heterogeneous nucleation will be favorable. Similarly, the free energy of a lens-shaped nucleus becomes negative when the line tension is negative and large. Then, the barrier-less nucleation with no thermal activation called athermal nucleation will be realized.

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“…Heterogeneous nucleation of liquids and crystals has been studied both theoretically and in simulation for a variety of geometries such as nucleation on planar walls [7,8] and in slit pores [9][10][11][12], on cylinders [13][14][15], patches [16,17], patterned templates [18][19][20][21], spheres [22][23][24] and in pores [25][26][27][28]. Experimental studies include colloidal crystallisation on patterned templates [4,29,30] and spherical impurities [31,32].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of two-step vapour–crystal nucleation in a pore

2015

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We present a numerical study of the effect of hemispherical pores on the nucleation of Lennard-Jones crystals from the vapour phase. As predicted by Page and Sear, there is a narrow range of pore radii, where vapour-liquid nucleation can become a two-step process. A similar observation was made for different pore geometries by Giacomello et al. We find that the maximum nucleation rate depends on both the size and the adsorption strength of the pore. Moreover, a poe can be more effective than a planar wall with the same strength of attraction. Pore-induced vapour-liquid nucleation turns out to be the rate-limiting step for crystal nucleation. This implies that crystal nucleation can be enhanced by a judicious choice of the wetting properties of a microporous nucleating agent.

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How nanoscale seed particles affect vapor-liquid nucleation

Cited by 20 publications

References 47 publications

Contact line pinning and the relationship between nanobubbles and substrates

Contact line pinning and the relationship between nanobubbles and substrates

Line-tension-induced scenario of heterogeneous nucleation on a spherical substrate and in a spherical cavity

Mechanism of two-step vapour–crystal nucleation in a pore

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