Boron ion irradiation induced structural and surface modification of glassy carbon

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2013-12, Vol.316, p.17-21
• Main Authors: Kalijadis, Ana, Jovanović, Zoran, Cvijović-Alagić, Ivana, Laušević, Zoran
• Format: Article
• Language: English
• Subjects: Boron irradiation; Glassy carbon; Structure; Surface properties
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2013.08.030

The incorporation of boron into glassy carbon was achieved by irradiating two different types of targets: glassy carbon polymer precursor and carbonized glassy carbon. Targets were irradiated with a 45keV B3+ ion beam in the fluence range of 5×1015–5×1016ionscm−2. For both types of targets, the implanted boron was located in a narrow region under the surface. Following irradiation, the polymer was carbonized under the same condition as the glassy carbon samples (at 1273K) and examined by Raman spectroscopy, temperature programmed desorption, hardness and cyclic voltammetry measurements. Structural analysis showed that during the carbonization process of the irradiated polymers, boron is substitutionally incorporated into the glassy carbon structure, while for irradiated carbonized glassy carbon samples, boron irradiation caused an increase of the sp3 carbon fraction, which is most pronounced for the highest fluence irradiation. Further analyses showed that different nature of boron incorporation, and thus changed structural parameters, are crucial for obtaining glassy carbon samples with modified mechanical, chemical and electrochemical properties over a wide range.