Effect of structural transformation of C + -ion implanted PMMA into quasi-continuous carbonaceous layer on its optical and electrical properties
| Autor: | Riffat Sagheer, M. Shahid Rafique, Shafaq Arif, Farhat Saleemi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Band gap Analytical chemistry macromolecular substances 02 engineering and technology 01 natural sciences Ion law.invention Inorganic Chemistry symbols.namesake Optical microscope law 0103 physical sciences Electrical and Electronic Engineering Physical and Theoretical Chemistry Spectroscopy 010302 applied physics chemistry.chemical_classification Organic Chemistry technology industry and agriculture Polymer 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ion implantation Amorphous carbon chemistry symbols 0210 nano-technology Raman spectroscopy Refractive index |
| Zdroj: | Optical Materials. 76:147-154 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2017.12.021 |
| Popis: | The samples of Polymethylmethacrylate (PMMA) have been implanted with 500 keV C+-ions at different ion fluences ranging from 9.3 × 1013 to 8.4 × 1014 ions/cm2. The structural modifications are examined by Fourier Transform Infrared and Raman spectral studies. For the investigation of optical, electrical and surface morphological properties of implanted samples UV–Visible spectrometer, four probe apparatus and optical microscope have been employed. The FTIR spectra confirmed the cleavage of chemicals bonds as a consequence of polymer chain scission, whereas, Raman studies revealed the transformation of PMMA structure into quasi-continuous amorphous carbon with increasing ion fluences. A continuous reduction has been observed in the optical band gap of PMMA from 3.16 to 1.42 eV. Moreover, the refractive index, extinction coefficient and electrical conductivity of implanted PMMA are found to be an increasing function of the ion fluence. The micrographic images revealed the signatures of ion-induced defects like cracking, dehydrogenation, stress and swelling on the surface of PMMA. These implanted samples have a potential to be used in the field of optical communications and thin plastic flexible electronics. |
| Databáze: | OpenAIRE |
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