Optical characteristics of composites obtained by ion implantation of silver ions in polyethylene terephthalate

Bumai, Yu. A.; Volobuev, Vladislav; Валеев, В. Ф.; Dolgikh, N. I.; Лукашевич, М. Г.; Хайбуллин, Р. И.; Нуждин, В. И.; Оджаев, В. Б.

doi:10.1007/s10812-012-9669-0

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…One can see that the resistance of the sample falls dramatically with the irradiation fluence, by ≈ more than 8 orders of magnitude in the considered fluence range. It should be mentioned that a similar effect was observed for the samples irradiated with different projectiles, including noble gases [40][41][42][43], metals [44][45][46][47][48][49], and non-metals [3,50,51]. The bulk resistivity reduction due to Na implantation is stronger than that reported for the PET samples irradiated with light noble gases [54].…”

Section: Resultssupporting

confidence: 71%

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Modification of PET Polymer Foil by Na⁺ Implantation

et al. 2019

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Very thin (3 µm) polyethylene terephthalate (PET) foils were irradiated with 150 keV Na + ions with the fluences in the range from 1 × 10 14 cm −2 up to 1 × 10 16 cm −2. Modification of chemical structure of the implanted polymer was studied with the Fourier transform infrared and Raman spectroscopies. Destruction of numerous chemical bonds as well as formation of carbon clusters made of sp 2 hybridised C atoms and conducting cluster networks were demonstrated. The increasing presence of chain structures in the graphite-like carbonised layer is pointed out as the G band shift and decrease of D band could be seen as irradiation fluence rises. The large increase of the modified sample absorbance with the implantation fluence in the UV-VIS region was observed. The decrease of optical band-gap energy from 3.95 eV for the pristine sample down to 0.7 eV for the most heavily treated sample was estimated using the Tauc plot. Reduction of bulk resistivity by more than 8 orders of magnitude is shown in the case of the sample implanted with the fluence 1 × 10 16 cm −2. The sheet resistivity of the sample was also reduced by 5 orders of magnitude. The effect was observed on both sides of the sample, probably as the result of chemical transformations due to local increase of the polymer foil temperature. The moderate increase (15-200%) of the dielectric constant is observed in the frequency range up to 1 MHz and the change rises with the implantation fluence.

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Section: Resultssupporting

confidence: 71%

“…The studies of PET sample modifications by ion implantations by noble gases [39][40][41][42][43], metals [44][45][46][47][48][49], and non-metals [3,50,51] have been reported over years. One of the most important changes is a drastic (over many orders of magnitude) decrease of PET resistivity with the implantation fluence.…”

Section: Introductionmentioning

confidence: 99%

Modification of PET Polymer Foil by Na⁺ Implantation

et al. 2019

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“…Additional reflectance and absorption modelling studies were performed. Reflectance studies utilising previously published polyethylene terephthalate (PET) reflectance values [ 14 ] demonstrated a nominal (≤ 1.5%) increase in UV365nm light intensity for parallel orientation of guidewire and UV fibre-optic consistent with the UV365nm transmission spectra of PET [ 15 ] (data not shown). Absorbance studies utilising previously published polytetrafluoroethylene (PTFE) absorbance values [ 16 ], representative of the standard guidewire coating, also demonstrated a nominal (≤ 2.0%) change in maximum UV365nm light intensity for the parallel GW/fibre-optic configuration (data not shown).…”

Section: Resultsmentioning

confidence: 79%

“…6 a–c). Additional reflectance modelling studies were performed utilising PET reflectance values [ 14 ]. The spiral UV-fibre-optic orientation identified a marginal (~ 4.0%) increase in maximum UV365nm light intensity (data not shown).…”

Section: Resultsmentioning

confidence: 99%

Advances in Design and Development of Lumi-Solve: A Novel Drug-Eluting Photo-Angioplasty Device

Sangeetha Menon,

Subasic de Azevedo,

Choong

et al. 2023

Cardiovasc Eng Tech

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Purpose The Lumi-Solve photo-angioplasty drug eluting balloon catheter (DEBc) may afford safety advantages over current DEBc. Lumi-Solve utilises the guidewire (GW) port and lumen to deliver fibre-optic UV365nm light to the angioplasty balloon which may be problematic. We explore and evaluate alternative Lumi-Solve design options to circumvent fibre-optic use of the GW port and lumen which may enhance efficacy and clinical utility. Methods Effects of guidewire shadowing (GWS) on visible and UV365nm light transmission were evaluated and modelled in-silico. To evaluate the effect of a dedicated intra-balloon fibre-optic port, modified angioplasty balloons and sections of translucent polyethylene terephthalate (PET) GW port tubing were utilised. Investigation of the effect of GWS on chemical and biological photo-activation of balloon surface drug was performed utilising LCMS analysis and inhibition of histone deacetylase activity (HDACi) was measured in human umbilical vein endothelial cells (HUVEC). Results Parallel fibre-optic and GW port configurations generated a GWS of approximately 18.0% of the evaluable balloon surface area and attenuated both visible and UV light intensity by 20.0–25.0% and reduced chemical photo-activation of balloon surface drug and HDACi by at least 40–45%. Alternative fibre-optic port configurations including a spiral design significantly mitigated GWS effects on UV light transmission. Conclusions To avoid use of the GW port and its associated complications a dedicated third port and lumen for the Lumi-Solve fibre-optic may be required. To maximize balloon surface chemical and biological photo-activation, non-parallel, intra-balloon, fibre-optic lumen trajectories, including a spiral design may be useful.

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“…Many reports concerning the modification of irradiated elastomers, e.g., acrylonitrilebutadiene rubber (NBR), ethylene propylene diene monomer (EPDM), and polytetrafluoroethylene (PTFE) irradiated by He + [49][50][51][52][53] were also delivered. Last but not least, much effort has gone into the investigations of implanted polyethylene terephthalate (PET) [54][55][56][57][58][59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Modification of PET Foil by 150 keV Li⁺ Ion Implantation

et al. 2022

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Very thin (3 µm in thickness) polyethylene terephthalate polymer foils were implanted with 150 keV Li + with fluences in the range from 1×10 14 cm −2 up to 2×10 16 cm −2 . Modification of the irradiated polymer microstructure was studied with the Fourier transform infrared spectroscopy and Raman spectroscopy. Breaking of a variety of chemical bonds followed by the formation of carbon clusters made of sp 2 C was proved. The dominance of the rings in the carbonized, graphite-like subsurface layer is demonstrated based on the fact that the G band prevails in the Raman spectra for larger Li + fluences. The rise of the absorbance within 200-800 nm is observed. Tauc's plots analysis enables the estimation of optical bandgap values that decrease from 3.95 eV (pristine polyethylene terephthalate) down to 1.4 eV (fluence of 2 × 10 16 cm −2 ). This change is not as dramatic as in the case of heavier projectiles like K + or Na + . Reduction of surface resistivity by more than 2 orders of magnitude is observed in the case of the sample irradiated with the fluence 1 × 10 16 cm −2 , and this effect is much smaller than that induced by the heavier projectile bombardment with the same fluence. topics: polymers modification, ion implantation, polyethylene terephthalate (PET)

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Optical characteristics of composites obtained by ion implantation of silver ions in polyethylene terephthalate

Cited by 10 publications

References 8 publications

Modification of PET Polymer Foil by Na⁺ Implantation

Modification of PET Polymer Foil by Na⁺ Implantation

Advances in Design and Development of Lumi-Solve: A Novel Drug-Eluting Photo-Angioplasty Device

Modification of PET Foil by 150 keV Li⁺ Ion Implantation

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Optical characteristics of composites obtained by ion implantation of silver ions in polyethylene terephthalate

Cited by 10 publications

References 8 publications

Modification of PET Polymer Foil by Na+ Implantation

Modification of PET Polymer Foil by Na+ Implantation

Advances in Design and Development of Lumi-Solve: A Novel Drug-Eluting Photo-Angioplasty Device

Modification of PET Foil by 150 keV Li+ Ion Implantation

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Product

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Modification of PET Polymer Foil by Na⁺ Implantation

Modification of PET Polymer Foil by Na⁺ Implantation

Modification of PET Foil by 150 keV Li⁺ Ion Implantation