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We will study the competitive effect between the transport of a quantum dot adsorbed to a ballistic channel and laterally coupled to a single-walled carbon nanotube (SWNT). We will use the tight-binding approach to analytically write the…

Mesoscale and Nanoscale Physics · Physics 2020-10-23 Thiago Lobo , Minos A. Neto , Marcio G. da Silva , Octavio D. R. Salmon

A simple method combining photolithography and shadow (or angle) evaporation is developed to fabricate single-walled carbon nanotube (SWCNT) devices with tube lengths L~10-50 nm between metal contacts. Large numbers of such short devices…

Materials Science · Physics 2009-11-10 Ali Javey , Pengfei Qi , Qian Wang , Hongjie Dai

Photoluminescence (PL) measurements of porphyrin-doped single wall carbon nanotubes (SWNT) were studied in sodium dodecylbenzenesulfonate (NaDDBS) aqueous dispersions. The PL spectra were used to draw PL maps were the maxima corresponds to…

The ultimate performance - ratio of electrical conductivity to optical absorbance - of single- walled carbon nanotube (SWCNTs) transparent conductive films (TCFs) is an issue of considerable application relevance. Here, we present direct…

Mesoscale and Nanoscale Physics · Physics 2016-02-01 Kimmo Mustonen , Patrik Laiho , Antti Kaskela , Toma Susi , Albert G. Nasibulin , Esko I. Kauppinen

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

Despite many theoretical schemes, the direct experimental observation of supramolecular control on band gap opening in single-walled carbon nanotubes (SWNT) is still lacking. We report experimental and theoretical demonstration of metal to…

Theory predicts peculiar features for excited-state dynamics in one dimension (1D) that are difficult to be observed experimentally. Single-walled carbon nanotubes (SWNTs) are an excellent approximation to 1D quantum confinement, due to…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Giancarlo Soavi , Francesco Scotognella , Daniele Viola , Timo Hefner , Tobias Hertel , Giulio Cerullo , Guglielmo Lanzani

In this work, we have examined how the multi-vacancy defects induced in the horizontal direction change the energetics and the electronic structure of semiconducting Single-Walled Carbon Nanotubes (SWCNTs). The electronic structure of…

Mesoscale and Nanoscale Physics · Physics 2017-08-21 G. Dereli , O. Eyecioglu , B. Sungu Misirlioglu

We report specifically two things, one the phenomenon of optically induced motion in pristine single walled carbon nanotubes (SWNT) on the macro-scale and other the consequent separation of metallic and semiconducting enriched SWNT…

Mesoscale and Nanoscale Physics · Physics 2019-08-17 Gopannagari Madhusudana , Vikram Bakaraju , H. Chaturvedi

We have measured shot noise in single walled carbon nanotubes (SWNT) with good contacts at 4.2 K at low frequencies ($f=600 - 850$ MHz). We find a strong modulation of shot noise over the Fabry-Perot pattern; in terms of differential Fano…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 F. Wu , P. Queipo , T. Tsuneta , T. H. Wang , E. Kauppinen , P. J. Hakonen

An elongation method based on ab initio quantum chemistry approaches is presented. It allows to study electronic structures and coherent electron transportation properties of single-walled carbon nanotubes (SWCNTs) up to 22nm in length…

Materials Science · Physics 2007-05-23 Jun Jiang , Wei Lu , Yi Luo

Controlled doping and understanding its underlying microscopic mechanisms is crucial for advancement of nanoscale electronic technologies, especially in semiconducting single-wall carbon nanotubes (s-SWNTs), where adsorbed counterions are…

Materials Science · Physics 2023-09-06 Klaus H. Eckstein , Tobias Hertel

Single photon emitters (SPEs) are a key component for their use as pure photon source in quantum technologies. In this study, we investigate the generation of SPEs from drop-casted hexagonal boron nitride (hBN) nanoflakes, examining the…

Single-walled carbon nanotube encapsulated in boron nitrite nanotube (SWCNT@BNNT) is a novel nanomaterial with a one-dimensional van der Waals (1D-vdW) heterostructure. In this paper, we demonstrated that the SWCNT@BNNT has an enhanced…

We compare Raman spectra from aqueous suspensions of length-separated single-walled carbon nanotubes (SWCNTs) dispersed using either polymer adsorption of single-stranded DNA or miscelle encapsulation with sodium deoxycholate surfactant.…

Materials Science · Physics 2008-11-04 J. R. Simpson , J. A. Fagan , M. L. Becker , E. K. Hobbie , A. R. Hight Walker

Single- and multi-walled molybdenum disulfide (MoS$_2$) nanotubes have been coaxially grown on small diameter boron nitride nanotubes (BNNTs) which were synthesized from heteronanotubes by removing single-walled carbon nanotubes (SWCNTs),…

We present a study on the kinetics of xenon desorption from single-wall carbon nanotube (SWNT) bundles using thermal desorption spectroscopy (TDS). TD-spectra from SWNT samples show a broad desorption feature peaked at significantly higher…

Condensed Matter · Physics 2009-11-07 Hendrik Ulbricht , Jennah Kriebel , Gunnar Moos , Tobias Hertel

The electronic properties of as-prepared and purified unoriented single-walled carbon nanotube films were studied by transmission measurements over a broad frequency range (far-infrared up to visible) as a function of temperature (15 K -…

Mesoscale and Nanoscale Physics · Physics 2018-02-02 K. Thirunavukkuarasu , F. Hennrich , K. Kamarás , C. A. Kuntscher

AFM manipulation was used to controllably stretch individual metallic single-walled carbon nanotubes (SWNTs). We have found that SWNTs can sustain elongations as great as 30% without breaking. Scanned gate microscopy and transport…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 D. Bozovic , M. Bockrath , J. H. Hafner , C. M. Lieber , H. Park , M. Tinkham

We present a novel floating catalyst synthesis route for individual, i.e. non-bundled, small diameter single-walled carbon nanotubes (SWCNTs) with a narrow chiral angle distribution peaking at high chiralities near the armchair species. An…

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