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We present a novel, cost-effective and facile technique, wherein multi-walled carbon nano-tubes (CNTs) were used to transform a photoluminescent material to exhibit stable and efficient electroluminescence (EL) at low-voltages. As a case…

Materials Science · Physics 2012-11-19 D. Haranath , Sonal Sahai , Mushahid Husain , Savvi Mishra , Virendra Shanker

The atomistic simulations of carbon nanotube (CNT) - carbon reinforced composite material are reported. The studied composite samples were obtained by impregnating certain amounts of CNTs (3,3) and (6,6) into pristine graphite matrix. The…

Materials Science · Physics 2011-03-14 Vitaly Chaban

The rapid progress on MgB2 superconductor since its discovery[1] has made this material a strong competitor to low and high temperature superconductors (HTS) for applications with a great potential to catch the niche market such as in…

Two-dimensional (2D) materials offer opportunities to explore both fundamental science and applications in the limit of atomic thickness. Beyond the prototypical case of graphene, other 2D materials have recently come to the fore. Of…

Materials Science · Physics 2021-01-11 Adam. J. Watson , Wenbo Lu , Marcos H. D. Guimarães , Meike Stöhr

A fabrication method for positioning and embedding a single-walled carbon nanotube (SWNT) across the diameter of a solid state nanopore is presented. Chemical vapor deposition (CVD) is used to grow SWNTs over arrays of focused ion beam…

Biological Physics · Physics 2013-08-07 E. S. Sadki , S. Garaj , D. Vlassarev , J. A. Golovchenko , D. Branton

Soft, stretchable organic field-effect transistors (OFETs) can provide powerful on-skin signal conditioning, but current fabrication methods are often material-specific: each new polymer semiconductor (PSC) requires a tailored process. The…

Atomically thin materials such as graphene are uniquely responsive to charge transfer from adjacent materials, making them ideal charge transport layers in phototransistor devices. Effective implementation of organic semiconductors as a…

Single electron transistors (SETs) are fabricated by placing single walled carbon nanotubes (SWNTs) on a 100 nm wide local Al/Al2O3 bottom gate and then contacting with Pd electrodes. Coulomb oscillations up to 125 K were observed and…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Paul Stokes , Saiful I. Khondaker

The electronic properties of multi-wall carbon nanotubes (MWNTs) have attracted much attention because they could lead to nano-sized electronic devices. Using chemical vapor deposition (CVD), MWNTs are produced in large quantities at a low…

Materials Science · Physics 2007-05-23 Hisashi Kajiura , Anil Nandyala , Alexey Bezryadin

We present a general approach to the computational design of nanostructured chemical sensors. The scheme is based on identification and calculation of microscopic descriptors (design parameters) which are used as input to a thermodynamic…

Scientists are always yearning for new and exciting ways to unlock graphene's true potential. However, recent reports suggest this two-dimensional material may harbor some unique properties, making it a viable candidate for use in…

Materials Science · Physics 2014-06-04 F. V. Kusmartsev , W. M. Wu , M. P. Pierpoint , K. C. Yung

With decreasing device dimensions, the performance of carbon nanotube field-effect transistors (CNFETs) is limited by high Off currents except at low drain voltages. We show that an asymmetric design improves the performance, reducing Off…

Condensed Matter · Physics 2009-11-10 S. Heinze , J. Tersoff , Ph. Avouris

This research for Eco-materials focuses on the improvement of photo response of titania thin films. The goal of this research is to find a suitable substrate for decreasing the band-gap of titania, to improve the microstructure and to seek…

Materials Science · Physics 2007-05-23 Wilfried Wunderlich , Nguyen Thi Hue , Sakae Tanemura

In recent years, there have been conflicting reports regarding the ultrafast photoconductive response of films of single walled carbon nanotubes (CNTs), which apparently exhibit photoconductivities that can differ even in sign. Here, we…

Mesoscale and Nanoscale Physics · Physics 2018-12-12 Peter Karlsen , Mikhail V. Shuba , Polina P. Kuzhir , Albert G. Nasibulin , Patrizia Lamberti , Euan Hendry

This letter reports a charge transfer p-doping scheme which utilizes one-electron oxidizing molecules to obtain stable, unipolar carbon nanotube transistors with a self-aligned gate structure. This doping scheme allows one to improve…

Materials Science · Physics 2015-07-20 Jia Chen , Christian Klinke , Ali Afzali , Phaedon Avouris

Solution-processed networks of semiconducting, single-walled carbon nanotubes (SWCNTs) have attracted considerable attention as materials for next-generation electronic devices and circuits. However, the impact of the SWCNT network…

The advancements of nanomaterials or nanostructures have enabled the possibility of fabricating multifunctional materials that hold great promises in engineering applications. The carbon nanotube (CNT)-based nanostructure is one…

Computational Physics · Physics 2015-05-22 Haifei Zhan , John M. Bell , Yuantong Gu

This paper describes atomistic simulations of deformation and fracture of Al reinforced with carbon nanotubes (CNTs). We use density functional theory (DFT) to understand the energetics of Al-graphene interfaces and gain reference data for…

Materials Science · Physics 2021-10-28 Samaneh Nasiri , Kai Wang , Mingjun Yang , Julien Guénolé , Qianqian Li , Michael Zaiser

On the basis of the spin-polarized density functional theory calculations, we demonstrate that partially-open carbon nanotubes (CNTs) observed in recent experiments have rich electronic and magnetic properties which depend on the degree of…

Materials Science · Physics 2009-11-16 Bing Huang , Young-Woo Son , Gunn Kim , Wenhui Duan , Jisoon Ihm

Multiwalled carbon nanotubes (MWCNTs) are decorated with Pt nanoparticles by a "layer-by-layer" approach using poly (sodium 4-styrene sulfonate) (PSS) and poly (diallyl dimethylammonium chloride) (PDDA). Transmission electron microscopy…

Materials Science · Physics 2022-03-15 Samaneh Nasiri , Feng Shi , Guang Yang , Erdmann Spiecker , Qianqian Li