Superior selectivity and sensitivity of blue phosphorus nanotubes in gas sensing applications
Type
ArticleKAUST Department
Physical Sciences and Engineering (PSE) DivisionDate
2017-05-23Permanent link to this record
http://hdl.handle.net/10754/625026
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On the basis of first principles calculations, we study the adsorption of CO, CO2, NH3, NO, and NO2 molecules on armchair and zigzag blue phosphorus nanotubes. The nanotubes are found to surpass the gas sensing performance of other one-dimensional materials, in particular Si nanowires and carbon nanotubes, and two-dimensional materials, in particular graphene, phosphorene, and MoS2. Investigation of the energetics of the gas adsorption and induced charge transfers indicates that blue phosphorus nanotubes are highly sensitive to N-based molecules, in particular NO2, due to covalent bonding. The current–voltage characteristics of nanotubes connected to Au electrodes are derived by the non-equilibrium Green's function formalism and used to quantitatively evaluate the change in resistivity upon gas adsorption. The observed selectivity and sensitivity properties make blue phosphorus nanotubes superior gas sensors for a wide range of applications.Citation
Montes E, Schwingenschlögl U (2017) Superior selectivity and sensitivity of blue phosphorus nanotubes in gas sensing applications. J Mater Chem C 5: 5365–5371. Available: http://dx.doi.org/10.1039/c6tc05094h.Sponsors
The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).Publisher
Royal Society of Chemistry (RSC)Journal
J. Mater. Chem. CISSN
2050-75262050-7534
ae974a485f413a2113503eed53cd6c53
10.1039/c6tc05094h