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Proceedings of the 4th International Conference on
Nanostructures (ICNS4)12-14 March 2012, Kish Island, I.R. Iran
Abstract Book|INST| Sharif University of Technology|142
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Carbon nanotubes (CNTs) have found their uses in the biological sci -
ences at molecular and cellular levels.Studies interfacing CNTs with bi-ological molecules indicate that such interfaces can be established while
the functions of biological molecules are preserved. In our study we
used functionalization procedures to improve the solubility and biocom-
patibility of SWNT. PEI ( poly ethylene imine) have been extensively
searched for its binding ability to plasmid due to positive surface charge
of its porotonated amine groups in biologic pH and different vectors are
synthesized by modifying PEI molecules to improve its viability . By at-
taching PEI to the surface of SWNT, synthesized vectors will be able to
bind plasmid efciently and internalize the cell without causing allergic
reactions and can be used as delivery vehicles for gene delivery purpose.
Keywords:Single wall carbon nanotube; Functionalization; Poly eth-ylene imine; Gene delivery
A. Hashem Niaa, b, M.Ramezanib*, M. Rahimizadeha, H. Eshghia, Kh. Abnoosb.aFaculty of Science, Department of Chemistry, Ferdowsi University, Mashhad,
IranbNanomedicine Lab, Pharmaceutical Research Center, School of Phar-
macy, Mashhad University of Medical Sciences, Mashhad, Iran
Synthesis of Nanovectors Based on Funconalizaonof Single Wall Carbon Nanotubes (SWNT) with Poly-
ethylenimine and Evaluaon of Their Transfecon E-
ciency in Gene Delivery
In this paper, ultimate stress of defected single-walled carbon nano-
tubes (SWCNT) has been investigated by using structural mechanics.
For simulation of nonlinear behaviour of C-C bonds, modied Morse
potential is used and initial elastic modulus is assigned to equivalent
frame element. The nanotube is loaded incrementally and at the each
step of loading, the stiffness of each element is changed according to
modied Morse potential. When the axial strain of C-C bond attains
to 19%, the element is eliminated by decreasing its stiffness to very
small value. This procedure is continuing until the nanotube ruptured
completely. For applying this method, we used the APDL option of
Ansys software. Finally, the ultimate stress of two types of CNTs, zig-
zag and armchair by taking into vacancy defects is determined for dif-
ferent lengths and diameters. Results show that the ultimate stress of
armchair nanotubes is larger than zigzag. Also by increasing length of
nanotubes, the ultimate stress decreases clearly.
Keywords: Ultimate stress; Defected carbon nanotube; Modied
Morse potential
J. Payandehpeyman*, R. Seif, Gh. Majzoobi
Department of Mechanical Engineering Faculty, Bu-Ali Sina University,
Hamedan, Iran
Esmaon of Ulmate Stress for Defected Single-Walled Carbon Nanotubes
Hybrid nanomaterials consisting of multiwalled carbon nanotubes
(MWCNT) decorated with palladium nanoparticles are produced by
irradiating of solid foil Pd target submerged in the aqueous solutionsof MWCNTs with nanosecond laser shots. Q-switched Nd:YAG laser,
at 1064 nm having 10 ns duration, 5 Hz repetition rate, 50 mJ pulsed
energy and 5 Jcm-2 energy density, induced Pd nanoparticles on the
surface of MWCNTs. The aim is to characterize the laser-induced
decoration of MWCNTs with Pd nanoparticles for various irradiation
times. The structure and surface properties of the decorated MWCNTs
and the yield of induced Pd nanoparticles are investigated by several
characterization methods such as transmission electron microscopy
(TEM), thermal gravimetric analysis (TGA), differential scanning
calorimetry (DSC) and Brunauer- Emmett-Teller (BET).
Keywords: Multi-walled carbon nanotubes; Palladium nanoparticles;
Nanosecond pulsed laser ablation
S.Z.Mortazavia, P.Parvina*, A.Reyhaniba Physics Department, Amirkabir University of Technology, Hafez Ave,
15875-4413, Tehran-Iranb Physics Department, Faculty of Science, I. K. I. University, 34149-16818,
Qazvin, Iran
Decoraon of Carbon Nanotubes by Palladium Nanopar-
cles Using Q-switched Nd:YAG Laser
We present Nyquist stability analysis based on transmission line mod-
eling for single wall carbon nanotube (SWCNT) bundle interconnects.
In this analysis, dependence of the degree of relative Nyquist stabil-
ity for SWCNT bundle interconnects on the dielectric constant (r) of
each tube has been acquired. It is shown that with increasing the di-
electric constant of each tube, SWCNT bundle interconnects become
more stable.
Keywords: Carbon nanotube; Interconnects; Dielectric constant; Ny-
quist stability criterion
B. Davoodia*, R. Faezb, S. Haji Nasiria, M. Farrokhia
a Department of Electrical Engineering, Qazvin Islamic Azad University, Qa-
zvin, 3419915195, Iranb Department of Electrical Engineering, , Sharif University of Technology,
Tehran, 1458889695, Iran
Eect of Varying Dielectric Constant on Relave Stability
for Carbon Nanotube based Interconnects
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Carbon nanotubes are including metallic and semiconducting phases
after synthesizing process. Therefore it is a very important issue which
attracts researchers attention for separation of metallic and semicon-
ducting carbon nanotubes. In this work, dielectrophoresis is suggested
M. Jahanshahia*, M. Izadi farda, A. M. Rashidib, M. Alaeib, M. H. Ameriounaa Department of Physics, Shahrood University of Technology, Shahrood, Iranb Nanotechnology research centre, Research Institute of Petroleum Industry,
Tehran, Iran
New Approach for Separaon of Metallic and Semicon-
ducng Carbon Nanotubes
as an effective and efcient method in order to separate these two types
of Carbon Nanotubes. Raman spectroscopy and absorbance spectros-
copy were employed to characterize the separated samples. Results
show purication of 62% in metallic products.
Keywords: Metallic CNT; Semiconducting CNT; Dielectrophoresis;
Raman spectroscopy.