TY - JOUR
T1 - The influence of γ-irradiation on nitrogen configuration in nitrogen-doped single-walled carbon nanotubes
AU - Thurakitseree, Theerapol
AU - Kramberger, Christian
AU - Chanlek, Narong
AU - Supruangnet, Ratchadaporn
AU - Wisitsorraat, Anurat
AU - Nakajima, Hideki
AU - Maruyama, Shigeo
PY - 2020/1
Y1 - 2020/1
N2 - Electronic properties of nitrogen-doped single-walled carbon nanotubes (N-doped SWCNTs) depend on carbon and nitrogen configuration. Depending on the intrinsic nitrogen structure, it can be either intrinsic p- or n- doping. Here, we have investigated the influence of soft gamma (γ)-irradiation on the nitrogen configuration in vertically aligned N-doped SWCNT arrays. As the irradiation dose increased, pyridinic and graphitic nitrogens become more predominant. In general, the presence of holes refer to p-doping. However, XPS spectra show n-doping features, whereas the slight downshift in the G line position in Raman spectra is from compensating the ambient p-doping. The local transition of π* nitrogen was also revealed by X-ray absorption spectroscopy.
AB - Electronic properties of nitrogen-doped single-walled carbon nanotubes (N-doped SWCNTs) depend on carbon and nitrogen configuration. Depending on the intrinsic nitrogen structure, it can be either intrinsic p- or n- doping. Here, we have investigated the influence of soft gamma (γ)-irradiation on the nitrogen configuration in vertically aligned N-doped SWCNT arrays. As the irradiation dose increased, pyridinic and graphitic nitrogens become more predominant. In general, the presence of holes refer to p-doping. However, XPS spectra show n-doping features, whereas the slight downshift in the G line position in Raman spectra is from compensating the ambient p-doping. The local transition of π* nitrogen was also revealed by X-ray absorption spectroscopy.
KW - Single-walled carbon nanotube
KW - Nitrogen-doped SWCNTs
KW - Nitrogen configuration
KW - Reforming
KW - Gamma irradiation
KW - GRAPHENE
KW - GROWTH
KW - RAMAN
KW - ELECTRON
UR - http://www.scopus.com/inward/record.url?scp=85075025843&partnerID=8YFLogxK
U2 - 10.1016/j.diamond.2019.107569
DO - 10.1016/j.diamond.2019.107569
M3 - Article
SN - 0925-9635
VL - 101
JO - Diamond and Related Materials
JF - Diamond and Related Materials
M1 - 107569
ER -