نتایج جستجو برای: dwcnt

تعداد نتایج: 45  

2007
R. Pfeiffer F. Simon H. Kuzmany V. N. Popov

Raman studies on double-wall carbon nanotubes (DWCNTs) obtained from peapods showed that the radial breathing mode (RBM) response of the inner tubes is split into more components than there are geometrically possible inner tubes. This was attributed to the possibility that one inner tube type may form in more than one outer tube type. Recent resonance Raman investigations revealed an even more ...

Journal: :J. Sensors 2013
Sadia Farjana F. Toomadj Per Lundgren A. Sanz-Velasco O. Naboka Peter Enoksson

is paper reports the strain sensitivity of �exible, electrically conductive, and nanostructured cellulose which was prepared by modi�cation of bacterial cellulose with double-walled carbon nanotubes (DWCNTs) and multiwalled carbon nanotubes (MWCNTs).e electrical conductivity depends on themodifying agent and its dispersion process.e conductivity of the samples obtained from bacterial cellulo...

2011
Leonidas Tsetseris Sokrates T Pantelides

The electronic properties of multi-walled carbon nanotubes (MWCNTs) depend on the positions of their walls with respect to neighboring shells. This fact can enable several applications of MWCNTs as nano-electromechanical systems (NEMS). In this article, we report the findings of a first-principles study on the stability and dynamics of point defects in double-walled carbon nanotubes (DWCNTs) an...

2006
Ferenc Simon Rudolf Pfeiffer Hans Kuzmany

The temperature dependence of optical excitation lifetime 1/ and transition energies Eii were measured for bucky papers of single-wall carbon nanotubes SWCNTs and inner tubes in double-wall carbon nanotubes DWCNTs using resonant Raman scattering on the radial breathing mode. The temperature dependence of and Eii is the same for both types of samples and is independent of tube chirality. The dat...

2013
Toshihiko Fujimori Aarón Morelos-Gómez Zhen Zhu Hiroyuki Muramatsu Ryusuke Futamura Koki Urita Mauricio Terrones Takuya Hayashi Morinobu Endo Sang Young Hong Young Chul Choi David Tománek Katsumi Kaneko

S1. Translational motion of 1D sulfur chains inside SWCNT Fig. S1 shows the observed translational motion of encapsulated sulfur chains during the HRTEM measurements. In the initial stage of the HRTEM observation, we find two lines inside the nanotube that extend across the entire SWCNT length (Fig. S1A). In subsequent observations taken several tens of seconds later (Fig. S1B), the length of t...

2012
Q. Yang Y. G. Wang D. H. Liu L. H. Zheng

We report a passively dual-wavelength mode-locked Yb:LuYSiO5 (Yb:LYSO) laser with a double-walled carbon nanotube saturable absorber (DWCNT-SA) for the first time. Simultaneous mode-locking at the 1045.5 and 1059.0 nm was achieved and the pulse duration of the dual-wavelength modelocked pulses are 8.0 ps. Ultrahigh repetition rate ultrafast pulses with 750 fs pulse width and 3.66 THz repetition...

Journal: :Applied Mathematics and Computation 2014
Keivan Kiani

Keywords: Free transverse vibration Vibration mode shapes Double-walled carbon nanotubes (DWCNTs) Nonlocal Rayleigh beam theory Reproducing kernel particle method (RKPM) a b s t r a c t The true understanding of free vibration of double-walled carbon nanotubes (DWCNTs) plays a vital role in optimal design and dynamic control of such nanostructures. This paper is aimed to examine free flexural v...

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