Sublattice asymmetry of impurity doping in graphene: A review

• James A. Lawlor and
• Mauro S. Ferreira

Beilstein J. Nanotechnol. 2014, 5, 1210–1217, doi:10.3762/bjnano.5.133

• for synthesis of such graphene monolayers and detail theoretical efforts to explain the mechanisms responsible for the effect, before suggesting future research directions in this nascent field. Keywords: band gap; electronic transport; graphene; nitrogen doping; sublattice asymmetry; Review

• segregation effect It is clear that any degree of asymmetry between the two equivalent sublattices is the result of a symmetry breaking operation. Current theoretical attempts to explain the sublattice asymmetry in the nitrogen doping seen in the experiments discussed in the previous section suggest that the

Resonance of graphene nanoribbons doped with nitrogen and boron: a molecular dynamics study

• Ye Wei,
• Haifei Zhan,
• Kang Xia,
• Wendong Zhang,
• Shengbo Sang and
• Yuantong Gu

Beilstein J. Nanotechnol. 2014, 5, 717–725, doi:10.3762/bjnano.5.84

• and the other is doped with both boron and nitrogen (doping with only nitrogen has already been investigated in our earlier work [23], hence it will not be considered herein). The different dopants were randomly distributed in the GNR. Since the N–N single bond is chemically unstable due to the low

• grain boundaries, oxidations or vacancies [34][35]. Specifically, for GNRs with vacancies, researchers reported three different types of nitrogen doping, namely graphitic N, pyridine-like N and pyrrole-like N depending on their locations. Therefore, in the following, we consider the vibration properties

Nanostructure sensitization of transition metal oxides for visible-light photocatalysis

• Hongjun Chen and
• Lianzhou Wang

Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82

• [38]. A synergetic effect of nitrogen-doping and CdSe quantum-dot-sensitization on nanocrystalline TiO2 was also investigated. Interestingly, a significant photoelectrochemical hydrogen generation enhancement was observed due to CdSe sensitization and N-doping that can facilitate hole transport from

A visible-light-driven composite photocatalyst of TiO₂ nanotube arrays and graphene quantum dots

• Donald K. L. Chan,
• Po Ling Cheung and
• Jimmy C. Yu

Beilstein J. Nanotechnol. 2014, 5, 689–695, doi:10.3762/bjnano.5.81

• concentration of MB dropped slowly to about 52 % after 3 h irradiation. The activity of pristine TNAs under visible light can be explained by nitrogen-doping as described previously. For GQDs/TNAs, an enhanced activity is achieved. The concentration of MB dropped to about 31% after 3 h irradiation. For

Tensile properties of a boron/nitrogen-doped carbon nanotube–graphene hybrid structure

• Kang Xia,
• Haifei Zhan,
• Ye Wei and
• Yuantong Gu

Beilstein J. Nanotechnol. 2014, 5, 329–336, doi:10.3762/bjnano.5.37

• the GNHS with different percentages of B-dopants. Similar to the cases of nitrogen doping, an evident decrease of the yield strength and early yielding are observed (Figure 5). Within the elastic deformation region, the increase of dopant leads to a marginal shift to the slope of the stress–strain

En route to controlled catalytic CVD synthesis of densely packed and vertically aligned nitrogen-doped carbon nanotube arrays

• Slawomir Boncel,
• Sebastian W. Pattinson,
• Valérie Geiser,
• Milo S. P. Shaffer and
• Krzysztof K. K. Koziol

Beilstein J. Nanotechnol. 2014, 5, 219–233, doi:10.3762/bjnano.5.24

• ) type as compared to the purely ‘base’-type for undoped MWCNTs. Keywords: carbon nanotubes; catalytic chemical vapour deposition; crystallinity; nitrogen doping; vertically aligned nanotube arrays; Introduction The doping of carbon nanotubes (CNTs) with boron [1][2], nitrogen [3][4] or phosphorus [5

• ) molecules of nitrogen entrapped between adjacent graphene layers. The types of nitrogen-doping can be referred to ‘pyridinic-‘, ‘pyrrolic-‘ and ‘azepinic-like’ in analogy to the nomenclature of simple heterocyclic molecules. Schematic reactions in the synthesis of N-CNTs and MWCNTs; for clarity only the

Functionalization of vertically aligned carbon nanotubes

• Eloise Van Hooijdonk,
• Carla Bittencourt,
• Rony Snyders and
• Jean-François Colomer

Beilstein J. Nanotechnol. 2013, 4, 129–152, doi:10.3762/bjnano.4.14

• arrangement, were used. Nitrogen doping was incorporated in the CNT bundles by nitrogen RF-plasma treatment (20 W of power, at a pressure of 27 Pa) with various exposure times (10–100 min), indicating the correlation between the duration of the nitrogen plasma treatment, i.e., an optimal doping concentration