The effect of boron incorporation on the structure and properties of glassy carbon
Samo za registrovane korisnike
2011
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Boron was introduced into glassy carbon by chemical modification and by irradiating the precursor polymer with boron ions. Using chemical modification, a polymer with uniform distribution of boron in the bulk was obtained, whereas irradiation with B3+ produced a polymer with boron located in a narrow region under the surface. Following modification with boron, the samples were carbonized at 1273 K and examined using X-ray diffraction, Raman spectroscopy, temperature programmed desorption (TPD) and by hardness measurements. Structural analysis results suggest that boron is mostly substitutionally bonded in the glassy carbon structure regardless of the method used to introduce boron into the polymer precursor. Formation of crosslinks between glassy carbon ribbons during carbonization as a consequence of the recombination of ion beam induced changes in the polymer structure and a high concentration of boron in the subsurface layer is proposed to account for an increase of glassy carbon ha...rdness. An increase in the total amount of surface oxygen groups was observed in the TPD spectra of both boron-modified samples due to an increase in the number of active sites. Results show that the nature of these sites is influenced by the initial distribution of boron in the polymer precursor. (C) 2011 Elsevier Ltd. All rights reserved.
Izvor:
Carbon, 2011, 49, 8, 2671-2678Izdavač:
- Elsevier Ltd.
Finansiranje / projekti:
- Fizika i hemija sa jonskim snopovima (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45006)
- Razvoj i primena metoda i materijala za monitoring novih zagađujućih i toksičnih organskih materija i teških metala (RS-MESTD-Basic Research (BR or ON)-172007)
DOI: 10.1016/j.carbon.2011.02.054
ISSN: 0008-6223
WoS: 000290083900011
Scopus: 2-s2.0-79953793528
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Kalijadis, Ana AU - Jovanović, Zoran M. AU - Laušević, Mila AU - Laušević, Zoran PY - 2011 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5660 AB - Boron was introduced into glassy carbon by chemical modification and by irradiating the precursor polymer with boron ions. Using chemical modification, a polymer with uniform distribution of boron in the bulk was obtained, whereas irradiation with B3+ produced a polymer with boron located in a narrow region under the surface. Following modification with boron, the samples were carbonized at 1273 K and examined using X-ray diffraction, Raman spectroscopy, temperature programmed desorption (TPD) and by hardness measurements. Structural analysis results suggest that boron is mostly substitutionally bonded in the glassy carbon structure regardless of the method used to introduce boron into the polymer precursor. Formation of crosslinks between glassy carbon ribbons during carbonization as a consequence of the recombination of ion beam induced changes in the polymer structure and a high concentration of boron in the subsurface layer is proposed to account for an increase of glassy carbon hardness. An increase in the total amount of surface oxygen groups was observed in the TPD spectra of both boron-modified samples due to an increase in the number of active sites. Results show that the nature of these sites is influenced by the initial distribution of boron in the polymer precursor. (C) 2011 Elsevier Ltd. All rights reserved. PB - Elsevier Ltd. T2 - Carbon T1 - The effect of boron incorporation on the structure and properties of glassy carbon EP - 2678 IS - 8 SP - 2671 VL - 49 DO - 10.1016/j.carbon.2011.02.054 ER -
@article{ author = "Kalijadis, Ana and Jovanović, Zoran M. and Laušević, Mila and Laušević, Zoran", year = "2011", abstract = "Boron was introduced into glassy carbon by chemical modification and by irradiating the precursor polymer with boron ions. Using chemical modification, a polymer with uniform distribution of boron in the bulk was obtained, whereas irradiation with B3+ produced a polymer with boron located in a narrow region under the surface. Following modification with boron, the samples were carbonized at 1273 K and examined using X-ray diffraction, Raman spectroscopy, temperature programmed desorption (TPD) and by hardness measurements. Structural analysis results suggest that boron is mostly substitutionally bonded in the glassy carbon structure regardless of the method used to introduce boron into the polymer precursor. Formation of crosslinks between glassy carbon ribbons during carbonization as a consequence of the recombination of ion beam induced changes in the polymer structure and a high concentration of boron in the subsurface layer is proposed to account for an increase of glassy carbon hardness. An increase in the total amount of surface oxygen groups was observed in the TPD spectra of both boron-modified samples due to an increase in the number of active sites. Results show that the nature of these sites is influenced by the initial distribution of boron in the polymer precursor. (C) 2011 Elsevier Ltd. All rights reserved.", publisher = "Elsevier Ltd.", journal = "Carbon", title = "The effect of boron incorporation on the structure and properties of glassy carbon", pages = "2678-2671", number = "8", volume = "49", doi = "10.1016/j.carbon.2011.02.054" }
Kalijadis, A., Jovanović, Z. M., Laušević, M.,& Laušević, Z.. (2011). The effect of boron incorporation on the structure and properties of glassy carbon. in Carbon Elsevier Ltd.., 49(8), 2671-2678. https://doi.org/10.1016/j.carbon.2011.02.054
Kalijadis A, Jovanović ZM, Laušević M, Laušević Z. The effect of boron incorporation on the structure and properties of glassy carbon. in Carbon. 2011;49(8):2671-2678. doi:10.1016/j.carbon.2011.02.054 .
Kalijadis, Ana, Jovanović, Zoran M., Laušević, Mila, Laušević, Zoran, "The effect of boron incorporation on the structure and properties of glassy carbon" in Carbon, 49, no. 8 (2011):2671-2678, https://doi.org/10.1016/j.carbon.2011.02.054 . .