Dependence of track etching kinetics on chemical reactivity around the ion path

Горбунов, С.; Rymzhanov, R.A.; Волков, А. Е.

doi:10.1038/s41598-019-51748-y

Cited by 10 publications

(12 citation statements)

References 28 publications

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Section: Results and Discussionmentioning

confidence: 99%

“…In comparison, this work reports power density and current density of 45 mW/cm 2 and 298 mA/cm 2 , respectively, using nanochannels created on the PVDF nanohybrid after irradiating in an accelerator with silver ions. However, the high current as well as power density of the functionalized nanohybrid membrane prepared through functionalization of the accelerator-irradiated hybrid membrane, are visualized from the high proton conduction using the ionomer membrane . The excellent fuel cell performance of the functionalized nanohybrid membrane against standard Nafion 117 and PVDF-g-s is mainly due to the enhanced degree of sulfonation in the presence of 2D-layered silicate uniformly dispersed in the polymer matrix.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The irradiation of swift heavy ions on the polymer matrix is known to produce reactive sites like free radicals, double bonds, and ionic species in the polymer chains as the energy of the particle radiation is much higher than the single-bond energy of carbon−carbon or carbon−hydrogen bonds present in the backbone of the polymer. 39 After selective chemical etching, the free radicals are uncovered within the nanochannels and are being utilized to graft other polymers like polystyrene exclusively in the nanochannels through polymerization. 40 It should be mentioned here that some free radicals are also generated on the surface of the polymer film during irradiation that is oxidized in the presence of air during storage of irradiated specimens, while the free radicals were buried in the bulk of the film.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…However, the high current as well as power density of the functionalized nanohybrid membrane prepared through functionalization of the accelerator-irradiated hybrid membrane, are visualized from the high proton conduction using the ionomer membrane. 39 The excellent fuel cell performance of the functionalized nanohybrid membrane against standard Nafion 117 and PVDF-g-s is mainly due to the enhanced degree of sulfonation in the presence of 2D-layered silicate uniformly dispersed in the polymer matrix. A new functionalized membrane along with its electroactive piezophase demonstrates the new generation of smart fuel cell membrane using common thermoplastics like PVDF.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Fabrication of Conducting Nanochannels Using Accelerator for Fuel Cell Membrane and Removal of Radionuclides: Role of Nanoparticles

Prakash

Mhatre

Tripathi

et al. 2020

ACS Appl. Mater. Interfaces

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Latent tracks in pure polymer and its nanohybrid are fabricated by irradiating with swift heavy ions (SHI) (Ag+) having 140 MeV energy followed by selective chemical etching of the amorphous path, caused by the irradiation of SHI, to generate nanochannels of size ∼80 nm. Grafting is done within the nanochannels utilizing free radicals generated from the interaction of high-energy ions, followed by tagging of ionic species to make the nanochannels highly ion-conducting. The uniform dispersion of two-dimensional nanoparticles better controls the size and number density of the nanochannels and, thereby, converts them into an effective membrane. The nanoparticle and functionalization induce a piezoelectric β-phase in the membrane. The functionalized membrane removes the radioactive nuclide like 241Am+3 (α-emitting source) efficiently (∼80% or 0.35 μg/cm2) from its solution/waste. This membrane act as a corrosion inhibitor (92% inhibition efficiency) together with its higher proton conduction (0.13 S/m) ability. The higher ion-exchange capacity, water uptake, ion conduction, and high sorption by the nanohybrid membrane are explored with respect to the extent of functionalization and control over nanochannel dimension. A membrane electrode assembly has been fabricated to construct a complete fuel cell, which exhibits superior power generation (power density of 45 mW/cm2 at a current density of 298 mA/cm2) much higher than that of the standard Nafion, measured in a similar condition. Further, a piezoelectric matrix along with its anticorrosive property, high sorption characteristics, and greater power generation makes this class of material a smart membrane that can be used for many different applications.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of Conducting Nanochannels Using Accelerator for Fuel Cell Membrane and Removal of Radionuclides: Role of Nanoparticles

Prakash

Mhatre

Tripathi

et al. 2020

ACS Appl. Mater. Interfaces

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“…In this paper, we present a numerical approach describing SHI track etching on the atomic level. In the first version of our model, we used the transition state theory and variations of the Gibbs energy of the damaged atomic ensemble to identify the most chemically active areas. The approach was limited to cylindrical geometry, which does not allow us to study the pore geometry depending on material structure.…”

Section: Introductionmentioning

confidence: 99%

Atomistic Model of Wet Chemical Etching of Swift Heavy Ion Tracks

et al. 2023

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We present a multiscale model describing wet chemical etching of swift heavy ion tracks in olivine on the atomic scale. The approach combines the Monte Carlo code TREKIS and molecular dynamics for simulations of excitation and structure transformations of the material after an ion impact. Analysis of the obtained atomic positions in the proximity of the ion trajectory allows us to build up the algorithm of atom-by-atom removal from the etching surface. The model describes the primary etching of the highly damaged cylindrical track core followed by dissociation of the peripheral region and formation of etched channels, cross-section shapes of which depend on the crystal orientations relative to the incident ion beam.

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