SAXS investigation of un-etched and etched ion tracks in polycarbonate

Hossain, Umme Habiba; Rodríguez, Matías; Schauries, Daniel; Hadley, A.; Schleberger, Marika; Trautmann, C.; Mudie, Stephen; Kluth, Patrick

doi:10.1016/j.nimb.2017.04.023

Cited by 16 publications

(20 citation statements)

References 28 publications

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“…Presence of such free volumes might have important consequences especially because, as stated by the authors; the technologically important porous structure is a common characteristic of heavy ion tracks in polymers. As stated by Hossain et al, SAXS also can provide a technology for investigation of the precise shape and size of nano-pores during in situ etching experiments, where also the early evolution of pore formation can be followed [114]. This article may help understanding chemistry of the fundamental aspects of nuclear track formation in PADC and thus provide information to those who are developing new solid state nuclear track detector polymer materials [115].…”

Section: Discussionmentioning

confidence: 90%

“…An experimental result we didn't speak about must be mentioned. It was demonstrated using small-angle X-ray scattering analyses of 2.64 GeV U ion damage trails in polycarbonate [114] that low concentration of 8-nm diameter bubbles reside in the surrounding track penumbra and those bubbles account for ~13% of the free volume in an ion-irradiatethere is indeed PC matrix. Presence of such free volumes might have important consequences especially because, as stated by the authors; the technologically important porous structure is a common characteristic of heavy ion tracks in polymers.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Role of intermediate species in the formation of ion tracks in PADC: A review

Fromm

Kodaira

Kusumoto

et al. 2019

Polymer Degradation and Stability

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Role of intermediate species in the formation of ion tracks in PADC: A review

Fromm

Kodaira

Kusumoto

et al. 2019

Polymer Degradation and Stability

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“…5b ), which consists of the highly damaged material (amorphization, broken bonds, and reduced mass density due to outgassing degradation fragments). These parallel oriented tracks have a lateral diameter of several nanometers 43 and often a highly damaged small core 20 . Moreover, the threshold of energy loss for the formation of homogeneous and continuous cylindrical tracks in polymer membranes is between 2 and 5 keV nm −1 44 .…”

Section: Discussionmentioning

confidence: 99%

Ultrafast ion sieving using nanoporous polymeric membranes

et al. 2018

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The great potential of nanoporous membranes for water filtration and chemical separation has been challenged by the trade-off between selectivity and permeability. Here we report on nanoporous polymer membranes with an excellent balance between selectivity and permeability of ions. Our membranes are fabricated by irradiating 2-μm-thick polyethylene terephthalate Lumirror® films with GeV heavy ions followed by ultraviolet exposure. These membranes show a high transport rate of K+ ions of up to 14 mol h−1 m−2 and a selectivity of alkali metal ions over heavy metal ions of >500. Combining transport experiments and molecular dynamics simulations with a polymeric nanopore model, we demonstrate that the high permeability is attributable to the presence of nanopores with a radius of ~0.5 nm and a density of up to 5 × 1010 cm−2, and the selectivity is ascribed to the interaction between the partially dehydrated ions and the negatively charged nanopore wall.

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“…The cylinder model has successfully been used to characterise both un-etched ion tracks [24,27,33] and cylindrical etched ion tracks [30,31] in a variety of materials. For the case of a simple cylinder the total intensity I(q) is the incoherent sum (equation 15) of the scattering contributions from all of the cylindrical pores being measured simultaneously [29].…”

Section: Cone Modelmentioning

confidence: 99%

“…While these techniques are useful, they can potentially introduce measurement artefacts due to sample preparation, generally suffer from poor statistics due to the limited number of channels imaged and have limited accuracy in quantifying the pore dimensions. SAXS is a powerful tool for the characterisation of ion tracks [26] and nano-sized channels [11,25,31,32] in many materials. It has several advantages over other characterisation techniques such as electron microscopy.…”

Section: Introductionmentioning

confidence: 99%

Analysis of nanometre sized aligned conical pores using SAXS

Hadley,

Notthoff,

Mota-Santiago

et al. 2019

Preprint

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Small angle X-ray scattering (SAXS) was used to quantitatively study the morphology of aligned, mono-disperse conical etched ion tracks in thin films of amorphous SiO 2 with aspect ratios of around 6:1, and in polycarbonate foils with aspect ratios of around 1000:1. This paper presents the measurement procedure and methods developed for the analysis of the scattering images and shows results obtained for the two material systems. To enable accurate parameter extraction from the data collected from conical scattering objects a model fitting the 2-D detector images was developed. The analysis involved fitting images from a sequence of measurements with different sample tilts to minimise errors which may have been introduced due to the experimental set-up.The model was validated by the exploitation of the geometric relationship between the sample tilt angle and the cone opening angle, to an angle observed in the features of the SAXS images. We also demonstrate that a fitting procedure for 1-D data extracted from the scattering images using a hard cylinder model can also be used to extract the cone size. The application of these techniques enables us to reconstruct the cone morphologies with unprecedented precision.

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SAXS investigation of un-etched and etched ion tracks in polycarbonate

Cited by 16 publications

References 28 publications

Role of intermediate species in the formation of ion tracks in PADC: A review

Role of intermediate species in the formation of ion tracks in PADC: A review

Ultrafast ion sieving using nanoporous polymeric membranes

Analysis of nanometre sized aligned conical pores using SAXS

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