Elimination of the Schottky Barrier at an Au-ZnSe Nanowire Nanocontact via in Situ Joule Heating

Yu, Ting; Wang, Yanguo

doi:10.1088/0256-307x/30/1/017902

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…Recently, nanomaterials have aroused interest among the scientific communities in the fields of physics, chemistry, and engineering. Some of these materials are nanoparticles, nanowires, [1][2][3][4] nanotubes, [5][6][7][8][9][10][11][12][13][14][15] and nanotube resonators. Among them, beam type structures play a vital role in the field of nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

Vibration and buckling analyses of nanobeams embedded in an elastic medium

Chakraverty¹,

Behera²

2015

Chinese Phys. B

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Boundary characteristic orthogonal polynomials are used as shape functions in the Rayleigh-Ritz method to investigate vibration and buckling of nanobeams embedded in an elastic medium. The present formulation is based on the nonlocal Euler-Bernoulli beam theory. The eigen value equation is developed for the buckling and vibration analyses. The orthogonal property of these polynomials makes the computation easier with less computational effort. It is observed that the frequency and critical buckling load parameters are dependent on the temperature, elastic medium, small scale coefficient, and length-to-diameter ratio. These observations are useful in the mechanical design of devices that use carbon nanotubes.

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Section: Introductionmentioning

confidence: 99%

Vibration and buckling analyses of nanobeams embedded in an elastic medium

Chakraverty¹,

Behera²

2015

Chinese Phys. B

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“…In general, the higher the resistance, the higher the heat. A large number of studies have been carried out to improve the contact characteristics of MWCNT and metal by using the local Joule heat to change the structure of the contact point, which makes the MWCNT and electrode covered with amorphous carbon. − However, it is indirectly verified through experiments that under the experimental conditions in this paper, the step change of conductivity is not caused by the change of contact resistance but by intrinsic resistance. The change of intrinsic resistance of CNTB can be divided into the intrinsic resistance of CNT contained in CNTB and the change of tunneling resistance between CNTs and layers.…”

Section: Methodsmentioning

confidence: 77%

Welding Model for a Carbon Nanotube Bundle with Staggered Electrodes: Implications for Conductivity with Joule Heating

Ouyang

Lin

et al. 2023

ACS Appl. Nano Mater.

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Carbon nanotubes (CNTs) have excellent electrical properties. However, it is challenging to demonstrate these properties in actual electrochemical measurements fully. Previous research has improved the electrical properties of CNTs through welding experiments. But the mechanism of the conductivity enhancement is still unclear. The welding process lacks adequate mechanistic studies and theoretical models. This article presents a theoretical model of a CNT circuit with staggered electrodes, which considers the effect of twist angle on a CNT bundle. A welding model of the CNT bundle circuit is also developed based on the structural changes of CNTs after welding and characterized by the resistance ratio of the CNT circuit pre- and post-welding. The welding model is analyzed to explore how the quantity, diameter, and length of CNTs in the bundle affect the welding effect. An electrical measurement system for CNTs was established to validate the welding model using a nanomanipulation system compatible with a scanning electron microscope. Then, a constant voltage and long-duration electric welding experiment was performed, which showed that the conductivity was enhanced about 1.5–4 times after welding. The results also demonstrated that longer and fewer CNTs in the bundle could improve the electrical conductivity by the welding process more significantly. These findings were consistent with the trend of the welding model. This article establishes a welding theoretical model of the CNT bundle with staggered electrodes, which effectively accounts for the electrical conductivity enhancement during CNT welding and will help more fully express excellent performance in carbon-based nanoelectronic devices, nanoelectromechanical systems, and electrocatalysts in its manufacturing stage.

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“…The linear 𝐼-𝑉 characteristic of Au-ZnSe NW nanocontact confirms formation of ohmic contact. [19] Once ohmic contact is formed, the 𝐼-𝑉 relationship will be mainly determined by the behavior of the nanoelectronic. Since ohmic contact with low resistance can be a better suppression of self-heating effects during operation of nanoelectronics, ohmic contact is essential to improve lifetime for reliable operation of nanoelectronics and to enhance performance of nanoelectronics.…”

mentioning

confidence: 99%

The Effect of an Incident Electron Beam on the I – V Characteristics of a Au-ZnSe Nanowire-Au Nanostructure

Yu¹,

Wang²

2013

Chinese Phys. Lett.

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In order to the modify electron transport property of a metal-semiconductor nanowire(NW)-metal (M-S-M) nanostructure, the effect of high-energy electron irradiation on the current-voltage (𝐼-𝑉 ) characteristics of M-S-M nanostructure is investigated by in situ transmission electron microscopy. Experimentally measured 𝐼-𝑉 characteristics of an M-S-M nanostructure can be obviously modified under electron beam irradiation. The current increases rapidly due to increase of the carrier densities resulting from the electron-hole pair excitation in the NW irradiated by the electron beam. If the electron beam is focused on the NW (M-S) nanocontact, the electrons in the Au electrode are excited to higher energy states above the height of the Schottky barrier that becomes transparent to the conduction electrons. As a result, the nonlinear to linear 𝐼-𝑉 characteristics can be observed. The experimentally revealed 𝐼-𝑉 characteristics corresponding to transformation from the rectification to Ohm strongly suggest that the intrinsic transport property of the M-S nanocontact can be completely modified by irradiation of the high-energy electron beam.

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Elimination of the Schottky Barrier at an Au-ZnSe Nanowire Nanocontact via in Situ Joule Heating

Cited by 7 publications

References 26 publications

Vibration and buckling analyses of nanobeams embedded in an elastic medium

Vibration and buckling analyses of nanobeams embedded in an elastic medium

Welding Model for a Carbon Nanotube Bundle with Staggered Electrodes: Implications for Conductivity with Joule Heating

The Effect of an Incident Electron Beam on the I – V Characteristics of a Au-ZnSe Nanowire-Au Nanostructure

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