Structural ( n, m) determination of isolated single-wall carbon nanotubes by resonant Raman scattering.
Ado Jorio,Riichiro Saito,Jason H. Hafner,Charles M. Lieber,M. Hunter,T. McClure,G. Dresselhaus,Mildred S. Dresselhaus +7 more
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TLDR
It is shown that the Raman scattering technique can give complete structural information for one-dimensional systems, such as carbon nanotubes, by measuring one radial breathing mode frequency omega(RBM) and using the theory of resonant transitions.Abstract:
We show that the Raman scattering technique can give complete structural information for one-dimensional systems, such as carbon nanotubes. Resonant confocal micro-Raman spectroscopy of an (n,m) individual single-wall nanotube makes it possible to assign its chirality uniquely by measuring one radial breathing mode frequency omega(RBM) and using the theory of resonant transitions. A unique chirality assignment can be made for both metallic and semiconducting nanotubes of diameter d(t), using the parameters gamma(0) = 2.9 eV and omega(RBM) = 248/d(t). For example, the strong RBM intensity observed at 156 cm(-1) for 785 nm laser excitation is assigned to the (13,10) metallic chiral nanotube on a Si/SiO2 surface.read more
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Closed-loop control of laser assisted chemical vapor deposition growth of carbon nanotubes
TL;DR: In this article, a temperature feedback control mechanism based on the dynamic, in situ monitoring of the infrared radiation coupled with reflectivity information was proposed to identify the onset for catalyst formation and activation by monitoring the fluctuation of the reflected laser beam.
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Growth of catalyst-assisted and catalyst-free horizontally aligned single wall carbon nanotubes
Imad Ibrahim,Alicja Bachmatiuk,Mark H. Rümmeli,Ulrike Wolff,Alexey A. Popov,Olga V. Boltalina,Bernd Büchner,Gianaurelio Cuniberti +7 more
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Resonant Raman of O–H/O–D vibrations and photoluminescence studies in LiTaO3 thin film
TL;DR: In this paper, a photoluminescence (PL) spectrum was shown to have a peak at 4.8 eV and a sub-band gap in UV (4.4 eV).
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A new equivalent spring model for determining the G-band mode frequency of single-walled carbon nanotubes
TL;DR: In this article, the G-band mode frequency of single-walled carbon nanotubes (SWCNTs) is studied on the basis of a new equivalent spring model, where the out of plane angle variation energy is incorporated into the model in order to obtain more precise results.
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Non-linear and resonance effects in carbon nanotube structures
TL;DR: In this article, the anti-Stokes/Stokes (aS/S) intensity ratios of the radial breathing modes (RBMs) of single walled carbon nanotubes (SWNTs) and conjugated polymers composites were investigated.