Cutting Ice: Nanowire Regelation

Hynninen, Teemu; Heinonen, Vili; Dias, Cristiano L.; Karttunen, Mikko; Foster, Adam S.; Ala-Nissilä, Tapio

doi:10.1103/physrevlett.105.086102

Cited by 27 publications

(24 citation statements)

References 34 publications

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“…However, in the absence of a magnetic field their selforganization is governed by the hard-sphere repulsion between the particles and a combination of electrostatic repulsion due to their charged surfaces and van der Waals attraction between them leading to the formation of a RHCP structure. Our findings are in good agreement with simulation results [39,40] on the assembly of these particles. However, our experimental study is remarkably different from that of simulation in one respect.…”

Section: Angewandte Chemiesupporting

confidence: 92%

“…Simulations, that have tried to address these questions, predict an assortment of equilibrium phases such as the body-centered tetragonal (BCT) and face-centered cubic (FCC) phases that can coexist with the 1D particle chains. [37][38][39][40] Experimentally it has been shown that in the presence of a magnetic field these nanoparticles self-assemble to a 1D chain phase. With an increase of both the strength and the gradient of the applied magnetic field [29,[41][42][43] these chains evolve into 2D sheets and 3D structures.…”

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confidence: 99%

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Tuning the Colloidal Crystal Structure of Magnetic Particles by External Field

Pal

Malik

et al. 2014

Angew Chem Int Ed

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Manipulation of the self-assembly of magnetic colloidal particles by an externally applied magnetic field paves a way toward developing novel stimuli responsive photonic structures. Using microradian X-ray scattering technique we have investigated the different crystal structures exhibited by self-assembly of core-shell magnetite/silica nanoparticles. An external magnetic field was employed to tune the colloidal crystallization. We find that the equilibrium structure in absence of the field is random hexagonal close-packed (RHCP) one. External field drives the self-assembly toward a body-centered tetragonal (BCT) structure. Our findings are in good agreement with simulation results on the assembly of these particles.

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Section: Angewandte Chemiesupporting

confidence: 92%

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confidence: 99%

Tuning the Colloidal Crystal Structure of Magnetic Particles by External Field

Pal

Malik

et al. 2014

Angew Chem Int Ed

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“…It has recently been used to study regelation, i.e., the melting of ice when subjected to high pressure and its refreezing once this pressure is lifted. 34 Here, we embed nonpolar solutes within 3DMB water and use Monte Carlo simulations to study structural and thermodynamic properties of these systems. Previous studies using the two-dimensional Mercedes-Benz model have shown that this method provides valuable information about the hydrophobic effect and its thermodynamics in the presence of small molecules and the denaturation of proteins.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobicity within the three-dimensional Mercedes-Benz model: Potential of mean force

Dias

Hynninen

Ala-Nissilä

et al. 2011

The Journal of Chemical Physics

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Articles you may be interested inThe hydrophobic effect in a simple isotropic water-like model: Monte Carlo study J. Chem. Phys. 140, 144904 (2014) We use the three-dimensional Mercedes-Benz model for water and Monte Carlo simulations to study the structure and thermodynamics of the hydrophobic interaction. Radial distribution functions are used to classify different cases of the interaction, namely, contact configurations, solvent separated configurations, and desolvation configurations. The temperature dependence of these cases is shown to be in qualitative agreement with atomistic models of water. In particular, while the energy for the formation of contact configurations is favored by entropy, its strengthening with increasing temperature is accounted for by enthalpy. This is consistent with our simulated heat capacity. An important feature of the model is that it can be used to account for well-converged thermodynamics quantities, e.g., the heat capacity of transfer. Microscopic mechanisms for the temperature dependence of the hydrophobic interaction are discussed at the molecular level based on the conceptual simplicity of the model.

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“…When these interactions are strong enough to overcome the Brownian motion, particles initially form dipolar chains, which then laterally coalesce to form the lowest energy structures such as a body-centered tetragonal, hexagonally close-packed (HCP), or face-centered cubic (FCC) lattice depending on the particle concentration and field. [32][33][34] Figure 1f demonstrates the assembly of micrometer-sized latex particles into 2D crystalline arrays upon the application of an AC electric field using coplanar electrodes. [33] It uses dielectrophoresis (DEP, i.e., the movement of polarized particles along a field gradient) and the induced particle interactions to cause the self-assembly of colloidal particles into HCP arrays.…”

Section: Self-assembly For Nanomanufacturingmentioning

confidence: 99%

Digital Assembly of Colloidal Particles for Nanoscale Manufacturing

Kotnala

Zheng

2019

Part & Part Syst Charact

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From unravelling the most fundamental phenomena to enabling applications that impact our everyday lives, the nanoscale world holds great promise for science, technology, and medicine. However, the extent of its practical realization relies on manufacturing at the nanoscale. Among the various nanomanufacturing approaches being investigated, the bottom‐up approach involving assembly of colloidal nanoparticles as building blocks is promising. Compared to a top‐down lithographic approach, particle assembly exhibits advantages such as smaller feature size, finer control of chemical composition, less defects, lower material wastage, and higher scalability. The capability to assemble colloidal particles one by one or “digitally” has been heavily sought as it mimics the natural method of making matter and enables construction of nanomaterials with sophisticated architectures. An insight into the tools and techniques for digital assembly of particles, including their working mechanisms and demonstrated particle assemblies, is provided. Examples of nanomaterials and nanodevices are presented to demonstrate the strength of digital assembly in nanomanufacturing.

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Cutting Ice: Nanowire Regelation

Cited by 27 publications

References 34 publications

Tuning the Colloidal Crystal Structure of Magnetic Particles by External Field

Tuning the Colloidal Crystal Structure of Magnetic Particles by External Field

Hydrophobicity within the three-dimensional Mercedes-Benz model: Potential of mean force

Digital Assembly of Colloidal Particles for Nanoscale Manufacturing

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