Elucidating the roles of diffusion and osmotic flow in controlling the geometry of nanochannels in asymmetric track-etched membranes

Blonskaya, I.V.; Лизунов, Н. Е.; Olejniczak, K.; Orelovich, O.L.; Yamauchi, Yu.; Toimil-Molares, María Eugenia; Trautmann, C.; Apel, P. Yu.

doi:10.1016/j.memsci.2020.118657

Cited by 11 publications

(6 citation statements)

References 71 publications

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“…Track-etching may also create the pores of noncylindrical shape, e.g., conoid. [95,96] The template synthesis consists of electrodeposition in porous templates and allows the formation of nanomaterials in various shapes, such as nanowires, nanotubes, and nanorods from desired metals. The template parameters as well as electrodeposition (b) (a) conditions (time, voltage, electrolyte) determine shape, size, and composition of nanostructures.…”

Section: Template Synthesis Of Nws and Ntsmentioning

confidence: 99%

1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

Panina

Zagorskiy

Shymskaya

et al. 2021

Physica Status Solidi (a)

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1D cylindrical magnetic nanostructures (FeNi, FeCo, FeCoP) of complex topology such as nanowires (NWs), nanotubes (NTs), multilayered nanowires, and core–shell structures are discussed from the perspective of engineering a wide variety of magnetic materials from hard to semihard to soft. Most of recent data are given for the materials synthesized in the pores of polymer ion‐track membranes, which makes it possible to tune systematically the geometrical parameters, morphology, and composition. The key properties including crystal and micromagnetic structure, magnetic anisotropy, and coercivity are analyzed. Co‐based NWs with uniform morphology demonstrate coercivity of more than 10 kOe due to the combination of crystalline and shape anisotropies. In the case of NTs, the demagnetizing effect is reduced owing to a helical arrangement of the magnetization, which leads to low values of coercivity and remanence magnetization. Varying the geometrical parameters of multilayered NWs, the alternating soft and semihard magnetic layers can be made within a single nanowire, which is important for spin‐valve magnetoresistance. Au‐coated ferromagnetic nanostructures are biocompatible and can be used to enhance optical absorption. Ni@Au NTs used as substrates for Raman spectroscopy demonstrate the enhancement factor of the order of 104. Some aspects related to applications of 1D magnets are briefly overviewed.

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Section: Template Synthesis Of Nws and Ntsmentioning

confidence: 99%

1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

Panina

Zagorskiy

Shymskaya

et al. 2021

Physica Status Solidi (a)

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“…37 Latent tracks in polymer films are subsequently etched with specific chemical reagents depending on the chemical properties of the trunk polymer to form TEMs with pores or channels. 38 Currently, TEMs are used for sizeselective filtration and separation in medical and biochemical applications, 10 gas permeation, 39 electrophoresis, 40 biological and chemical sensors, 41 optical sensors, 42 Li−S battery separators, 43 ion-selective devices, 44 and templates for the growth of hydrogels and nanowires of metals, semiconductors, and insulators. 45,46 In this study, a PI/hBN separator was successfully fabricated by combining a heavy ion track etching technique and a doctor blade coating method to achieve highly safe LIBs.…”

Section: Introductionmentioning

confidence: 99%

Hexagonal Boron Nitride-Coated Polyimide Ion Track Etched Separator with Enhanced Thermal Conductivity and High-Temperature Stability for Lithium-Ion Batteries

Liu

Cao

Yao

et al. 2022

ACS Appl. Energy Mater.

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The separator plays a vital role in preventing thermal runaway in lithium-ion batteries (LIBs). Herein, a PI/hBN (polyimide/hexagonal boron nitride) separator with excellent thermal stability and enhanced thermal conductivity is successfully prepared by ion track etching and doctor blade coating to achieve highly safe LIBs. The PI/hBN separator displays good electrolyte wettability, high mechanical strength, excellent thermal stability, and enhanced in-plane thermal conductivity, as well as good electrochemical performance when applied in LIBs. Specifically, PI track-etched membranes have been used to prepare separators with rigid structures and functional groups in polymer chains, thereby enabling the separators to be stable at temperatures as high as 500 °C. Moreover, hBN-coated nanoplates enhance the in-plane thermal conductivity of the separator to reduce the local heat accumulation in the battery while also promoting interfacial compatibility to facilitate the conduction of lithium ions. Lithium iron phosphate/lithium cells with the PI/hBN separator deliver better rate capability and superior capacity retention. The PI/hBN separator is a promising candidate for achieving highly safe LIBs, and this work paves the way for engineering roll-to-roll techniques to suppress thermal runaway and improve battery safety.

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“…A variety of sophisticated applications of etched ion tracks has been envisaged. [ 7,8 ] The understanding of ion track formation and how track size depends on the ion energy loss and on the properties of the target materials are fundamental issues underlying most of the phenomena induced by swift heavy ions in organic matter and the applications derived from them.…”

Section: Introductionmentioning

confidence: 99%

Applying the Inelastic Thermal Spike Model to the Investigation of Damage Induced by High‐Energy Ions in Polymers

Rocha

May

Thomaz

et al. 2022

Macro Chemistry & Physics

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This work reports on damage production in polymers by high-energy ions within the framework of the inelastic thermal spike model (i-TS). The model is used to describe the effective size of the damaged region around the ion path (the track size) in amorphous poly(methyl methacrylate) (PMMA) and the semicrystalline poly(p-phenylene sulphide) (PPS), poly(ethylene terephthalate) (PET), and poly(vinylidene difluoride) (PVDF). Track size calculations are compared to experimental data deduced from measurements of crater size, bond-breaking cross-sections, changes in crystallinity and electron density, track etching, and electrical depolarization. The use of data obtained from distinct types of damage provides a broad platform to test the applicability of the model to polymers. This work shows that the i-TS correctly describes the dependence of the track size on energy loss obtained from most experimental probes, when the activation energy of thermal decomposition of the polymers is used as the criterion of track formation, using an electron-phonon mean free path of ≈3 nm. As damage is not uniform across the ion track radial dimension, there are fine variations in the experimental damage radii that can only be accounted for by using multiple activation processes. Amorphization radii of the semicrystalline polymers are not directly correlated to melting induced by the ions.

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Elucidating the roles of diffusion and osmotic flow in controlling the geometry of nanochannels in asymmetric track-etched membranes

Cited by 11 publications

References 71 publications

1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

1D Nanomaterials in Fe‐Group Metals Obtained by Synthesis in the Pores of Polymer Templates: Correlation of Structure, Magnetic, and Transport Properties

Hexagonal Boron Nitride-Coated Polyimide Ion Track Etched Separator with Enhanced Thermal Conductivity and High-Temperature Stability for Lithium-Ion Batteries

Applying the Inelastic Thermal Spike Model to the Investigation of Damage Induced by High‐Energy Ions in Polymers

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