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Akhmadishina, K. F.; Bobrinetskiy, I. I.; Komarov, I. A.; Malovichko, A. M.; Nevolin, V. K.; Fedorov, G. E.; Golovin, A. V.; Zalevskiy, A. O.; Aidarkhanov, R. D. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Fast-response biological sensors based on single-layer carbon nanotubes modified with specific aptamers |
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Journal Article |
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Year |
2015 |
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Semicond. |
Abbreviated Journal |
Semicond. |
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Volume |
49 |
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13 |
Pages |
1749-1753 |
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carbon nanotubes, CNT detectors |
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The possibility of the fabrication of a fast-response biological sensor based on a composite of single-layer carbon nanotubes and aptamers for the specific detection of proteins is shown. The effect of modification of the surface of the carbon nanotubes on the selectivity and sensitivity of the sensors is investigated. It is shown that carboxylated nanotubes have a better selectivity for detecting thrombin. |
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1063-7826 |
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1783 |
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Eletskii, A. V.; Sarychev, A. K.; Boginskaya, I. A.; Bocharov, G. S.; Gaiduchenko, I. A.; Egin, M. S.; Ivanov, A. V.; Kurochkin, I. N.; Ryzhikov, I. A.; Fedorov, G. E. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Amplification of a Raman scattering signal by carbon nanotubes |
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Journal Article |
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Year |
2018 |
Publication |
Dokl. Phys. |
Abbreviated Journal |
Dokl. Phys. |
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63 |
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12 |
Pages |
496-498 |
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Keywords |
carbon nanotubes, CNT, Raman scattering, RLS |
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The effect of Raman scattering (RLS) signal amplification by carbon nanotubes (CNTs) was studied. Single-layered nanotubes were synthesized by the chemical vapor deposition (CVD) method using methane as a carbon-containing gas. The object of study used was water, the Raman spectrum of which is rather well known. Amplification of the Raman scattering signal by several hundred percent was attained in our work. The maximum amplification of a Raman scattering signal was shown to be achieved at an optimal density of nanotubes on a substrate. This effect was due to the scattering and screening of plasmons excited in CNTs by neighboring nanotubes. The amplification mechanism and the possibilities of optimization for this effect were discussed on the basis of the theory of plasmon resonance in carbon nanotubes. |
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1028-3358 |
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1775 |
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Fedorov, G. E.; Stepanova, T. S.; Gazaliev, A. S.; Gaiduchenko, I. A.; Kaurova, N. S.; Voronov, B. M.; Goltzman, G. N. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Asymmetric devices based on carbon nanotubes for terahertz-range radiation detection |
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Journal Article |
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2016 |
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Semicond. |
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Semicond. |
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50 |
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12 |
Pages |
1600-1603 |
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carbon nanotubes, CNT detectors |
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Various asymmetric detecting devices based on carbon nanotubes (CNTs) are studied. The asymmetry is understood as inhomogeneous properties along the conducting channel. In the first type of devices, an inhomogeneous morphology of the CNT grid is used. In the second type of devices, metals with highly varying work functions are used as the contact material. The relation between the sensitivity and detector configuration is analyzed. Based on the data obtained, approaches to the development of an efficient detector of terahertz radiation, based on carbon nanotubes are proposed. |
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1063-7826 |
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1776 |
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Yang, Y.; Fedorov, G.; Shafranjuk, S. E.; Klapwijk, T. M.; Cooper, B. K.; Lewis, R. M.; Lobb, C. J.; Barbara, P. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Electronic transport and possible superconductivity at Van Hove singularities in carbon nanotubes |
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Journal Article |
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Year |
2015 |
Publication |
Nano Lett. |
Abbreviated Journal |
Nano Lett. |
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15 |
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12 |
Pages |
7859-7866 |
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carbon nanotubes, CNT, tunable superconductivity, van Hove singularities |
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Van Hove singularities (VHSs) are a hallmark of reduced dimensionality, leading to a divergent density of states in one and two dimensions and predictions of new electronic properties when the Fermi energy is close to these divergences. In carbon nanotubes, VHSs mark the onset of new subbands. They are elusive in standard electronic transport characterization measurements because they do not typically appear as notable features and therefore their effect on the nanotube conductance is largely unexplored. Here we report conductance measurements of carbon nanotubes where VHSs are clearly revealed by interference patterns of the electronic wave functions, showing both a sharp increase of quantum capacitance, and a sharp reduction of energy level spacing, consistent with an upsurge of density of states. At VHSs, we also measure an anomalous increase of conductance below a temperature of about 30 K. We argue that this transport feature is consistent with the formation of Cooper pairs in the nanotube. |
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Department of Physics, Georgetown University , Washington, District of Columbia 20057, United States |
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1530-6984 |
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PMID:26506109; Suuplementary info (attached to pdf) DOI: 10.1021/acs.nanolett.5b02564 |
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1782 |
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Kampfrath, Tobias; Perfetti, Luca; von Volkmann, Konrad; Aguirre, Carla M.; Desjardins, Patrick; Martel, Richard; Frischkorn, Christian; Wolf, Martin |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Optical response of single-wall carbon nanotube sheets in the far-infrared spectral range from 1 THz to 40 THz |
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Journal Article |
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2007 |
Publication |
Physica Status Solidi (B) |
Abbreviated Journal |
Phys. Stat. Sol. (B) |
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244 |
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11 |
Pages |
3950-3954 |
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single wall, carbon nanotube, SWNT, SWCNT, CNT, detector, sensor, TDS |
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The optical properties of single-wall carbon nanotube sheets in the far-infrared have been investigated with THz time-domain spectroscopy. Over a wide frequency range from 1 THz to 40 THz, the complex dielectric function of the nanotube sample has been derived. Our data can be excellently reproduced by a Drude-Lorentz model function. The extracted fit parameters such as Lorentz resonance frequency and plasma frequency are consistent with values obtained by scanning tunneling techniques. We discuss the origin of both the Lorentz and Drude contribution in terms of direct and indirect optical transitions. |
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0370-1972 |
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569 |
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