Inactivation of Ice Nucleating Activity of Silver Iodide by Antifreeze Proteins and Synthetic Polymers

Inada, Takaaki; Koyama, Toshie; Goto, Fumitoshi; Seto, Takafumi

doi:10.1021/jp300535z

Cited by 31 publications

(51 citation statements)

References 50 publications

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“… 26 Inada et al have demonstrated that PVA is very effective at blocking silver iodide induced ice nucleation, which is hypothesized to be due to it binding to the surface of the AgI nucleators. 48 , 49 PVA has also been shown to deactivate the nucleating ability of the ice nucleating proteins from Pseudomonas syringae . 16 In contrast to these reports, our assay made every attempt to exclude nucleators, but from the freezing point of around −20 °C observed for Milli-Q, here it appears that heterogeneous nucleation still dominates, even with the high purity water.…”

Section: Results and Discussionmentioning

confidence: 99%

Probing the Biomimetic Ice Nucleation Inhibition Activity of Poly(vinyl alcohol) and Comparison to Synthetic and Biological Polymers

et al. 2015

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Nature has evolved many elegant solutions to enable life to flourish at low temperatures by either allowing (tolerance) or preventing (avoidance) ice formation. These processes are typically controlled by ice nucleating proteins or antifreeze proteins, which act to either promote nucleation, prevent nucleation or inhibit ice growth depending on the specific need, respectively. These proteins can be expensive and their mechanisms of action are not understood, limiting their translation, especially into biomedical cryopreservation applications. Here well-defined poly(vinyl alcohol), synthesized by RAFT/MADIX polymerization, is investigated for its ice nucleation inhibition (INI) activity, in contrast to its established ice growth inhibitory properties and compared to other synthetic polymers. It is shown that ice nucleation inhibition activity of PVA has a strong molecular weight dependence; polymers with a degree of polymerization below 200 being an effective inhibitor at just 1 mg.mL–1. Other synthetic and natural polymers, both with and without hydroxyl-functional side chains, showed negligible activity, highlighting the unique ice/water interacting properties of PVA. These findings both aid our understanding of ice nucleation but demonstrate the potential of engineering synthetic polymers as new biomimetics to control ice formation/growth processes

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Section: Results and Discussionmentioning

confidence: 99%

Probing the Biomimetic Ice Nucleation Inhibition Activity of Poly(vinyl alcohol) and Comparison to Synthetic and Biological Polymers

et al. 2015

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“…Water freezing on various material surfaces is of importance in wide-ranging fields [1][2][3][4][5] such as cloud seeding in climate, frost heaving, and cell preserving. So far, the microscopic mechanisms of the key process of freezing on substrates, the heterogeneous ice nucleation, still remains elusive [6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen polarity of interfacial water regulates heterogeneous ice nucleation

Shao

Zhang

et al. 2020

Phys. Chem. Chem. Phys.

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Using all-atomic molecular dynamics(MD) simulations, we show that various substrates could induce interfacial water (IW) to form the same ice-like oxygen lattice but different hydrogen polarity order, and regulate the heterogeneous ice nucleation on the IW. We develop an efficient MD method to probe the shape, structure of ice nuclei and the corresponding supercooling temperatures. We find that the polarization of hydrogens in IW increases the surface tension between the ice nucleus and the IW, thus lifts the free energy barrier of heterogeneous ice nucleation. The results show that not only the oxygen lattice order but the hydrogen disorder of IW on substrates are required to effectively facilitate the freezing of atop water.

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“…The melting of Sn cores was observed at 228.3°C, while freezing occurred only at 98.3°C. Such large thermal hysteresis (undercooling) in tin melting/freezing (~130°C) could be related to antifreezing properties of PVP shell or due to the small size of the high‐purity Sn particles. Similar thermal hysteresis was reported in the literature for 5 nm Pb particles in SiO 2 matrix .…”

Section: Resultsmentioning

confidence: 99%

Nanofluids with encapsulated tin nanoparticles for advanced heat transfer and thermal energy storage

Cingarapu

Singh

Timofeeva

et al. 2013

Int. J. Energy Res.

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SUMMARY Novel high‐temperature heat transfer fluids (HTFs) with incorporated phase change nanomaterials were synthesized and tested for heat transfer and thermal energy storage. The advanced thermal properties were achieved by preparing a nanofluid consisting of core/shell silica encapsulated tin (Sn/SiO2) nanoparticles dispersed in a synthetic HTF Therminol 66 (TH66) at loadings up to 5 vol%. Tin nanoparticles were synthesized by modified polyole reduction method followed by sol–gel silica encapsulation process. The measured increase in thermal conductivity of the nanofluid (~13% at 5 vol%) was in agreement with Maxwell's effective medium theory. Latent heat of phase change during melting of Sn core added ~11% increase to the volumetric thermal energy storage of the nanofluid when cycled in between 100°C and 270°C. The value could be further improved if thermal cycling is conducted in a narrower temperature range. The experimental results demonstrated dual functionality of the engineered nanofluids as desired for Concentrated Solar Power systems. Viscosity and stability of the nanofluids as well as thermal stability of core/shell nanomaterials) were investigated in a wide temperature range to obtain a perspective on any additional pumping power requirements for the nanofluid over the base fluid. Copyright © 2013 John Wiley & Sons, Ltd.

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Inactivation of Ice Nucleating Activity of Silver Iodide by Antifreeze Proteins and Synthetic Polymers

Cited by 31 publications

References 50 publications

Probing the Biomimetic Ice Nucleation Inhibition Activity of Poly(vinyl alcohol) and Comparison to Synthetic and Biological Polymers

Probing the Biomimetic Ice Nucleation Inhibition Activity of Poly(vinyl alcohol) and Comparison to Synthetic and Biological Polymers

Hydrogen polarity of interfacial water regulates heterogeneous ice nucleation

Nanofluids with encapsulated tin nanoparticles for advanced heat transfer and thermal energy storage

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