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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Controlling the growth morphology of carbon nanotubes: from suspended bridges to upright forests
Yunhao Cao,Ya-Qiong Xu +1 more
TL;DR: By appropriately adjusting the growth temperature and controlling the C(2)H( 2) pulse time, this work has managed to produce both suspended CNT bridges and upright forests within a single growth procedure and to form suspended pristine CNT transistors with a relatively high yield.
Journal ArticleDOI
Quantitative analysis of dispersion and doping of individual carbon nanotubes in water based solutions using absorption and Raman spectroscopy
B. R. Priya,Hugh J. Byrne +1 more
TL;DR: In this article, a quantitative analysis of the doping of individual carbon nanotubes in surfactant at this concentration is conducted by varying the pH from I to 13 and monitoring the Raman spectrum.
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Low-Pressure Alcohol Chemical Vapor Deposition of Single-Wall Carbon Nanotubes with In situ Catalyst Deposition
TL;DR: In this paper, a low-pressure chemical vapor deposition (CVD) system with in situ catalyst deposition capability has been fabricated to grow single-wall carbon nanotubes (SWNTs) in a controlled manner.
DissertationDOI
Electron-phonon coupling, vibrational, and optical properties of carbon nanotubes and picotubes
TL;DR: In this paper, the electron-phonon coupling matrix elements were assumed to be independent of the nanotube geometry, but the results of Raman spectroscopy and photoluminescence measurements appeared contradictory in the constant electronphonons coupling picture, and the coupling is strong for the high-energy mode, and weaker for the radial breathing mode.
Journal ArticleDOI
Carbon nanotube alignment and sorting: Attempting a sulfur moiety as anchoring component
TL;DR: In this paper, the Schipper group established a method for simultaneously sorting and aligning single walled carbon nanotubes using an alignment relay technique (ART) with molecule 1.