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A theoretical model for the calculation of the phonon-drag thermopower, $S^{g}$, in degenerately doped semiconducting single-wall carbon nanotubes (SWCNTs) is proposed. Detailed calculations of $S^{g}$ are performed as a function of…

Mesoscale and Nanoscale Physics · Physics 2011-03-03 Margarita Tsaousidou

We report evidence for high temperature superconductivity in three dimensional networks of boron doped, ultrathin carbon nanotubes (CNTs) grown inside the ~5 Angstrom channels of ZSM-5 zeolite. Confinement stabilizes (2,1) CNTs that are…

Superconductivity · Physics 2026-05-08 Y. Wang , T. H. Koo , R. Huang , Y. H. Ng , T. T. Lortz , T. Zhang , W. M. Chan , Y. Hou , J. Pan , S. Krämer , A. Demuer , R. Lortz , N. Wang , P. Sheng

High electric conductivity ~100 MegaSiemens/m and Seebeck coefficient >200 mkV/K of carbon nanotubes (CNT) make them attractive for a variety of applications. Unfortunately, a high thermal conductivity ~ 3000 W/(m*K) due to the phonon…

Mesoscale and Nanoscale Physics · Physics 2016-11-10 T. Gupta , I. P. Nevirkovets , V. Chandrasekhar , S. Shafranjuk

The use of MgB2 in superconducting applications still awaits for the development of a MgB2-based material where both current-carrying performance and critical magnetic field are optimized simultaneously. We achieved this by doping MgB2 with…

Superconductivity · Physics 2009-11-11 A. Serquis , G. Serrano , S. Moreno , ; L. Civale , B. Maiorov , ; F. Balakirev , M. Jaime

Fluorescent semiconducting single-walled carbon nanotubes (SWCNTs) hold considerable promise for photonics. Furthermore, the optical characteristics of the material can be significantly improved by covalent modification, which generates new…

We introduce a novel nanofabrication technique to directly deposit catalyst pads for the chemical vapor deposition synthesis of single-walled carbon nanotubes (SWCNTs) at any desired position on a substrate by Gallium focused ion beam (FIB)…

Applied Physics · Physics 2018-08-10 El-Hadi S. Sadki , Ryo Matsumoto , Hiroyuki Takeya , Yoshihiko Takano

We report a first-principles study, which demonstrates that a single Ti atom coated on a single-walled nanotube (SWNT) binds up to four hydrogen molecules. The first H$_2$ adsorption is dissociative with no energy barrier while other three…

Materials Science · Physics 2009-11-11 T. Yildirim , S. Ciraci

There is a growing momentum in recent thermoelectric materials research for flexible materials which enhance power output and efficiency at human wearable temperatures. In our previous work, we established the method to improve…

We have investigated excitons in highly-aligned single-walled carbon nanotubes (SWCNTs) through optical spectroscopy at low temperature (1.5 K) and high magnetic fields ($\textbf{\textit{B}}$) up to 55 T. SWCNT/polyacrylic acid films were…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 J. Shaver , S. A. Crooker , J. A. Fagan , E. K. Hobbie , N. Ubrig , O. Portugall , V. Perebeinos , Ph. Avouris , J. Kono

Recent experiments about the low temperature behaviour of a Single Wall Carbon Nanotube (SWCNT) showed typical Coulomb Blockade (CB) peaks in the zero bias conductance and allowed us to investigate the energy levels of interacting…

Strongly Correlated Electrons · Physics 2009-11-11 S. Bellucci , P. Onorato

An in situ optical absorbance measurement was used to study the growth dynamics of vertically aligned single-walled carbon nanotubes (VA-SWCNTs) synthesized by chemical vapor deposition of ethanol. The growth rate of the VA-SWCNT film was…

Materials Science · Physics 2008-01-06 Erik Einarsson , Yoichi Murakami , Masayuki Kadowaki , Shigeo Maruyama

Photoluminescence properties of semiconducting single wall carbon nanotubes (s-SWNT) thin films with different metallic single wall carbon nanotubes (m-SWNT) concentrations are reported. s-SWNT purified samples are obtained by polymer…

For terahertz (THz) wave applications, tunable and rapid modulation is highly required. When studied by means of optical pump-terahertz probe spectroscopy, single-walled carbon nanotubes (SWCNTs) thin films demonstrated ultrafast carrier…

High-speed electrical switching of Ge2Sb2Te5 (GST) remains a challenging task due to the large impedance mismatch between the low-conductivity amorphous state and the high-conductivity crystalline state. In this letter, we demonstrate an…

This study reports on the properties of nitrogen doped titanium dioxide $TiO_2$ thin films considering the application as transparent conducting oxide (TCO). Sets of thin films were prepared by sputtering a titanium target under oxygen…

A 1 $\mu$m long, field emitting, (5,5) single-walled, carbon nanotube (SWCNT) closed with a fullerene cap, and a similar open nanotube with hydrogen-atom termination, have been simulated using the MNDO (Modified Neglect of Diatomic Overlap)…

We explore the electric-field effect of carbon nanotubes (NTs) in electrolytes. Due to the large gate capacitance, Fermi energy shifts of order +/- 1 V can be induced, enabling to tune NTs from p to n-type. Consequently, large resistance…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 M. Krueger , M. R. Buitelaar , T. Nussbaumer , C. Schoenenberger , L. Forro

This paper is the first one of a series of two articles in which we revisit the optical properties of single-walled carbon nanotubes (SWNT). Produced by rolling up a graphene sheet, SWNT owe their intriguing properties to their cylindrical…

Mathematical Physics · Physics 2018-11-30 Morten Rasmussen , Benjamin Ricaud , Baptiste Savoie

Single-walled carbon nanotubes (SWNTs) have many interesting properties; they may be metallic or semiconducting depending on their diameter and helicity of the graphene sheet. Hydrostatic or quasi-hydrostatic high pressures can probe many…

Materials Science · Physics 2009-11-10 R. Falconi , J. A. Azamar , R. Escudero

Single-walled carbon nanotubes (SWNTs) are potential materials for future nanoelectronics. Since the electronic and optical properties of SWNTs strongly depend on tube diameter and chirality, obtaining SWNTs with narrow (n,m) chirality…

Materials Science · Physics 2007-11-28 Xiaolin Li , Xiaomin Tu , Sasa Zaric , Kevin Welsher , Won Seok Seo , Wei Zhao , Hongjie Dai