Nicole Grobert - Academia.edu (original) (raw)
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Vishvesvaraya Technological University, Belgaum, Karnataka, INDIA
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Papers by Nicole Grobert
Highly graphitised needle-like elongated carbon nanostructures containing encapsulated Ni, are pr... more Highly graphitised needle-like elongated carbon nanostructures containing encapsulated Ni, are produced by heating alternating thin films of C60 and Ni on a silica plate at 950 °C. High Resolution Transmission Electron Microscopy (HRTEM) studies reveal that these tapering structures are fully filled with Ni and are closed at both ends. The diameters of the needles (ca. 2-5 mum in length)
... VV Afanas'ev, A. Stesmans 2027 Aluminum-seeded growt... more ... VV Afanas'ev, A. Stesmans 2027 Aluminum-seeded growth of microcrystalline Si thin film onto SnO2 substrate Chang Hyun Lee, Koeng Su Lim MAGNETISM AND SUPERCONDUCTIVITY 2030 Growth-induced uniaxial anisotropy in grazing-incidence deposited magnetic films ...
The temperature dependent thermoelectric power (TEP) of boron and nitrogen doped multiwalled carb... more The temperature dependent thermoelectric power (TEP) of boron and nitrogen doped multiwalled carbon nanotube mats has been measured showing that such dopants can be used to modify the majority conduction from p-type to n-type. The TEP of boron doped nanotubes is positive, indicating hole-like carriers. In contrast, the nitrogen doped material exhibits negative TEP over the same temperature range, suggesting electron-like conduction. Therefore, the TEP distinct nonlinearites are primarily due to the formation of donor and acceptor states in the B-and N-doped materials. The sharply varying density of states used in our model can be directly correlated to the scanning tunneling spectroscopy studies of these materials. PACS numbers: 65.80+n, 61.46+w, 73.63.Fg, 81.07.De
Nitrogen doped multiwalled nanotubes (N-MWNTs) and boron doped multiwalled nanotubes (B-MWNTs) ha... more Nitrogen doped multiwalled nanotubes (N-MWNTs) and boron doped multiwalled nanotubes (B-MWNTs) have been prepared by chemical vapor deposition and arc-discharge method, respectively, and acceptor and donor states have been verified by Scanning Tunneling Spectroscopy. These doped materials have been studied by Raman Scattering and compared to un-doped multiwalled nanotubes (MWNTs). It is theoretically predicted that B-MWNTs all share the same chirality so particular attention is paid to these materials. Due to the growth method and the ``bamboo'' structure of the N-MWNTs difficulties arise in the interpretation of the Raman modes. FTIR and Absorption measurements have also been made.
Science and Applications, 2012
Highly graphitised needle-like elongated carbon nanostructures containing encapsulated Ni, are pr... more Highly graphitised needle-like elongated carbon nanostructures containing encapsulated Ni, are produced by heating alternating thin films of C60 and Ni on a silica plate at 950 °C. High Resolution Transmission Electron Microscopy (HRTEM) studies reveal that these tapering structures are fully filled with Ni and are closed at both ends. The diameters of the needles (ca. 2-5 mum in length)
... VV Afanas'ev, A. Stesmans 2027 Aluminum-seeded growt... more ... VV Afanas'ev, A. Stesmans 2027 Aluminum-seeded growth of microcrystalline Si thin film onto SnO2 substrate Chang Hyun Lee, Koeng Su Lim MAGNETISM AND SUPERCONDUCTIVITY 2030 Growth-induced uniaxial anisotropy in grazing-incidence deposited magnetic films ...
The temperature dependent thermoelectric power (TEP) of boron and nitrogen doped multiwalled carb... more The temperature dependent thermoelectric power (TEP) of boron and nitrogen doped multiwalled carbon nanotube mats has been measured showing that such dopants can be used to modify the majority conduction from p-type to n-type. The TEP of boron doped nanotubes is positive, indicating hole-like carriers. In contrast, the nitrogen doped material exhibits negative TEP over the same temperature range, suggesting electron-like conduction. Therefore, the TEP distinct nonlinearites are primarily due to the formation of donor and acceptor states in the B-and N-doped materials. The sharply varying density of states used in our model can be directly correlated to the scanning tunneling spectroscopy studies of these materials. PACS numbers: 65.80+n, 61.46+w, 73.63.Fg, 81.07.De
Nitrogen doped multiwalled nanotubes (N-MWNTs) and boron doped multiwalled nanotubes (B-MWNTs) ha... more Nitrogen doped multiwalled nanotubes (N-MWNTs) and boron doped multiwalled nanotubes (B-MWNTs) have been prepared by chemical vapor deposition and arc-discharge method, respectively, and acceptor and donor states have been verified by Scanning Tunneling Spectroscopy. These doped materials have been studied by Raman Scattering and compared to un-doped multiwalled nanotubes (MWNTs). It is theoretically predicted that B-MWNTs all share the same chirality so particular attention is paid to these materials. Due to the growth method and the ``bamboo'' structure of the N-MWNTs difficulties arise in the interpretation of the Raman modes. FTIR and Absorption measurements have also been made.
Science and Applications, 2012