Highly Selective Ionic Transport through Subnanometer Pores in Polymer Films

Qi, Wen; Yan, Dongxiao; Liu, Feng; Wang, Mao; Ling, Yun; Wang, Pengfei; Kluth, Patrick; Schauries, Daniel; Trautmann, C.; Apel, P. Yu.; Guo, Wei; Xiao, Guoqing; Liu, Jie; Xue, Jianming; Wang, Yugang

doi:10.1002/adfm.201601689

Cited by 204 publications

(210 citation statements)

References 48 publications

Supporting

Mentioning

196

Contrasting

Unclassified

Order By: Relevance

“…Indeed, the track consists of heavily damaged polymer, contains a high concentration of carboxylic groups and increased free volume due to amorphization and outgassing of volatile degradation fragments. At low pH, the carboxylic groups are protonated, which results in a decrease in the ionic permeability of the tracks . It is remarkable that the effect of the acidic stopping solution on the breakthrough time decreases with decreasing energy loss of the ion that produced the track.…”

Section: Resultsmentioning

confidence: 99%

“…The relative difference among the times of the through etching of Kr ion tracks caused by different pH values of the stopping solution is ≈30% on average (see Figure C). We assume this is ascribed to the fact that carboxylic groups play the role of a pH‐sensitive promoter of electrolyte diffusion through damage trails produced by energetic ions . As a consequence of lower dissipated energy the latent tracks of lighter ions contain fewer carboxylic groups, and the etchant penetration into the tracks is substantially slower and less influenced by pH.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Osmotic Effects in Track‐Etched Nanopores

Apel

Blonskaya

Лизунов

et al. 2018

Small

Self Cite

View full text Add to dashboard Cite

Asymmetrically etched ion-track membranes attract great interest for both fundamental and technical reasons because of a large variety of applications. So far, conductometric measurements during track etching provide only limited information about the complicated asymmetric etching process. In this paper, monitoring of osmotic phenomena is used to elucidate the initial phase of nanopore formation. It is shown that strong alkaline solutions generate a considerable osmotic flow of water through newborn conical pores. The interplay between diffusion and convection in the pore channel results in a substantially nonlinear alkali concentration gradient and a rapid change in the pore geometry after breakthrough. Similar phenomena are observed in experiments with cylindrical track-etched pores of 15-30 nm in radius. A theoretical description of the diffusion-convection processes in the pores is provided.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Osmotic Effects in Track‐Etched Nanopores

Apel

Blonskaya

Лизунов

et al. 2018

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…Duan et al utilized ion‐track templates and electrochemical deposition to fabricate Cu nanocones and nanowire arrays . Wang and co‐workers fabricated nanoporous polymeric membranes using heavy ion irradiation and UV radiation . The typical fabrication process, MD simulations, and transport measurements are shown in Figure .…”

Section: Ion Beam Techniques For Materials Synthesis and Morphology Cmentioning

confidence: 99%

Section: Ion Beam Techniques For Materials Synthesis and Morphology Cmentioning

confidence: 99%

A Review of Recent Applications of Ion Beam Techniques on Nanomaterial Surface Modification: Design of Nanostructures and Energy Harvesting

Zhan

Song

et al. 2019

Small

View full text Add to dashboard Cite

properties because of their special struc ture. When the materials reach a nano meter size, the electrical, optical, magnetic, and other properties of the materials will be altered greatly because of the small size effect, quantum size effect, sur face and boundary effects, and Coulomb blockade effect. [1] Currently, nanomaterials have been widely applied in many fields, including computers, catalysis, sensors, energy, and environmental protection. [2][3][4][5][6][7][8][9][10][11] As the demand increases, people aspire to fabricate nanomaterials with greater prop erties. Many methods have been used to improve the properties of nanomaterials, including doping, surface reconstruc tion, semiconductor composite, and metal nanoparticle embedding. [12][13][14][15][16][17][18][19][20] These days, ion beam techniques, including ion implantation, irradiation, and focused ion beam (FIB), have been extensively used to modulate the properties of nanomaterials. Moreover, ion beam techniques are regarded as a promising technique for doping and surface modification. Compared with doping during growth and diffusion, ion implantation is more controllable and reproducible. In addition, ion implantation is also an effective method for embedding nanoclusters in body materials. Moreover, ion irradiation is an effective method to modulate the morphology and surface structure of the mate rials. Therefore, via using this technique, various properties of nanomaterials can be tailored. FIB is typically used for the in situ study of ionirradiated materials. Figure 1 shows the applications of ion beam techniques for nanomaterial surface modification.Ion implantation, as an ion beam technique, has been extensively applied to the modulation of nanomaterial sur faces. Moreover, the technique has also been extensively used in the field of microelectronics. Ion implantation has replaced diffusion as a doping method to introduce dopants into the semiconductors. As an industrial technique, it exhibits high controllability and accuracy. In contrast to other doping strat egies, almost all elements can be introduced into the target materials by ion implantation and it does not introduce other impurity elements. In addition, ion implantation is not restricted by the solid solubility of elements in the mate rials. Ion implantation can be described as a collision process Nanomaterials have gained plenty of research interest because of their excellent performance, which is derived from their small size and special structure. In practical applications, to acquire nanomaterials with high performance, many methods have been used to modulate the structure and components of materials. To date, ion beam techniques have extensively been applied for modulating the performance of various nanomaterials. Energetic ion beams can modulate the surface morphology and chemical components of nanomaterials. In addition, ion beam techniques have also been used to fabricate nanomaterials, including 2D materials, nanoparticles, and nanowires. Compared with conventional metho...

show abstract

“…With the help of electric and magnetic fields, the precise ion sieving has been achieved by controlling the interlayer distance of graphene oxide membranes. [27] Up to now, based on materials such as boron nitride, [28] CNTs, [29] polymers, [30] etc., researchers have prepared many kinds of highly selective separation membranes, which can mimic biological channels to realize water purification or ion sieving. [19] An experiment has shown that Aquaporins had a homotetramer structure with each subunit having an hourglass shape.…”

Section: Introductionmentioning

confidence: 99%

Structure and Transport Properties of Water and Hydrated Ions in Nano‐Confined Channels

Zhu

Wang

Fan

et al. 2019

Advcd Theory and Sims

View full text Add to dashboard Cite

Nano-confined flow is ubiquitous in modern engineering and biomedical applications. As the peculiar phenomena of nano-confined flow were continuously reported and traditional theories failed to describe them accurately, simulation efforts have been made to gain deeper insight. The objective of this paper is to provide an overview of the recent progress on nano-confined flow, including water flow and hydrated ions transport. This report starts with the water behavior under nano-confinement, summarizing the water structures, flow properties and their dependence on wall wettability, channel size, etc. The report also presents the efforts made to modify the existing theories to describe nano-confined flows. Then, the report goes to the hydrated ions. The dehydration process of hydrated ions and ions sieving are discussed in detail, and the effects of membrane surface charge, grafting functional groups, and external field on ions transport are reviewed. In this Progress Report, the transport properties of water and hydrated ions in nano-confined channels are highlighted, which is critical to the design and application of nanofluidic devices, such as nanofiltration membranes, biosensors, and other related fields.

show abstract

Highly Selective Ionic Transport through Subnanometer Pores in Polymer Films

Cited by 204 publications

References 48 publications

Osmotic Effects in Track‐Etched Nanopores

Osmotic Effects in Track‐Etched Nanopores

A Review of Recent Applications of Ion Beam Techniques on Nanomaterial Surface Modification: Design of Nanostructures and Energy Harvesting

Structure and Transport Properties of Water and Hydrated Ions in Nano‐Confined Channels

Contact Info

Product

Resources

About