Low energy B+ implantation induced optical and structural characteristics of aliphatic and aromatic polymers

Sharma, Ambika; Chawla, Mahak; Gupta, Divya; Kumari, Rimpi; Bura, Manu; Shekhawat, Nidhi; Aggarwal, Sanjeev

doi:10.1016/j.vacuum.2018.10.058

Cited by 9 publications

(5 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, one may expect that characteristics of effects for both stopping mechansims may be observed. However, more detailed SRIM calculations (like in [40]) taking into account full cascade collisions using 5000 of incoming primary particles shows that more than 76% of the energy loss is due to the electronic stopping, which was also reported as the dominant stopping mechanism in the case of B + implantation into PET [60]. Thus, one may suppose that typical effects for electronic stopping mechanism like degassing and polymer cross-linking are of major importance at least in the topmost modified layer.…”

Section: Resultsmentioning

confidence: 99%

“…To summarise things up -the presence of the signatures of carbon structures (D and G bands) in the Raman spectra that were collected from the top layer of the foil suggest the strong presence of electronic stopping leading to intensive degassing and formation of C clusters/networks due to cross-linking. It should be mentioned that the lack of D and G bands in the spectra obtained for 50 keV B + irradiated PET samples [60] was explained by the fact that low energy projectile was not able to destroy the ring structure. In the currently considered case electronic stopping initially prevails and leads to degassing and formation of carbon structures in the upper layer of the foil.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Modification of PET Polymer Foil by Na⁺ Implantation

et al. 2019

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Modification of PET Polymer Foil by Na⁺ Implantation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…As a large number of free radicals is produced via electronic stopping intense crosslinking of polymer is observed while this stopping mechanism dominates. In other words the ratio of nuclear and electronic stopping powers (Sn/Se) determines the path the structural modification of ion beam irradiated polymer will follow [18].…”

Section: Introductionmentioning

confidence: 99%

Modification of Optical, Electronic and Microstructural Properties of PET by 150 keV Cs+ Irradiation

Musiatowicz¹,

Turek²,

Droździel³

et al. 2022

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

Thick (0.125 mm) sheet samples of PET were irradiated with 150 keV Cs + ion beam with fluences in the range from 10 13 cm -2 up to 10 16 cm -2 ). Raman and UV-VIS spectroscopy measurements shown destruction of numerous bonds within the polymer -this effect intensifies with fluence. Raman spectroscopy shows the presence of amorphous graphitelike structures as the broad G band appears in the collected spectrum. The analysis of absorbance spectra also confirms formation of numerous carbon clusters leading to a formation of vast conducting structures in the modified layer of the polymer. One can observe the decrease of optical bandgap from 3.85 eV (typical for pristine PET) to 1.05 eV for the sample implanted with the highest fluence, the effect is weaker than for lighter alkali metal ions. The estimated average number of C atom in a clusters reaches in such case values close to 1100. The changes in the polymer structure lead to intense reduction of electrical sheet resistivity of the modified samples by ~ 8 orders of magnitude in the case of severely modified sample. The dependence of resistivity on temperature has also been measured. The plots of ln(σ) vs 1/T show that band conductivity or nearest neighbor hopping between conducting structures prevail in the considered case

show abstract

“…That is why, ion implantation is successfully used for surface engineering of organic polymers without altering the properties of the substrate material in the bulk. By ion-beam technology one can significantly improve the optical characteristics [14,[20][21][22][23][24], electronic properties [24][25][26][27][28][29], electrical conductivity [14,[25][26][27]30], biocompatibility [31,32], surface, mechanical and thermal properties [25][26][27]30] of optically-transparent synthetic polymers, such as polymethylmethacrylate (PMMA) and polycarbonate. Even at low energy (keV range), ion implantation can change the surface, the chemical structure and thereby the properties of such plastics.…”

Section: Introductionmentioning

confidence: 99%

Near-Surface Nanostructuring of Polymethylmethacrylate by Silicon Ion Implantation

Hadjichristov

Ivanov

2022

JNanoR

View full text Add to dashboard Cite

The properties of organic polymers implanted with low-energy ions are of scientific and practical interest. In this work, we consider the nanostructure produced in the near-surface region of polymethylmethacrylate (PMMA) implanted with silicon (Si+) ions at energy of 50 keV and ion fluence of 1016 ions/cm2. By controlled local chemical modification in a depth of 150 – 200 nm, in PMMA was created a nano-thin bi-layer configuration consisting of ion-modified layer and ion-implanted layer with carbonaceous nanostructure. Such complex nanoscale arrangement and organic transconductance configuration was characterized by direct current electrical measurements. The field-effect configuration in Si+-implanted PMMA was driven through the formed ion-implanted buried planar layer (as a channel with a thickness of about 100 nm) of nanoclustered amorphous carbon as an organic semiconductor. The values of performance parameters, such as the charge carrier mobility, contact resistance and gate leakage current of this particular type of organic field-effect transistor configuration were determined.

show abstract

Low energy B+ implantation induced optical and structural characteristics of aliphatic and aromatic polymers

Cited by 9 publications

References 41 publications

Modification of PET Polymer Foil by Na⁺ Implantation

Modification of PET Polymer Foil by Na⁺ Implantation

Modification of Optical, Electronic and Microstructural Properties of PET by 150 keV Cs+ Irradiation

Near-Surface Nanostructuring of Polymethylmethacrylate by Silicon Ion Implantation

Contact Info

Product

Resources

About

Low energy B+ implantation induced optical and structural characteristics of aliphatic and aromatic polymers

Cited by 9 publications

References 41 publications

Modification of PET Polymer Foil by Na+ Implantation

Modification of PET Polymer Foil by Na+ Implantation

Modification of Optical, Electronic and Microstructural Properties of PET by 150 keV Cs+ Irradiation

Near-Surface Nanostructuring of Polymethylmethacrylate by Silicon Ion Implantation

Contact Info

Product

Resources

About

Modification of PET Polymer Foil by Na⁺ Implantation

Modification of PET Polymer Foil by Na⁺ Implantation