Ageing effect on the field emission reproducibility of multiwalled carbon nanotubes

Zou, Qi; Wang, M.Z.; Li, Y.G.; Zou, Liang‐Hua

doi:10.1080/17458080.2010.497943

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…117 The influence of ageing on the field emission (FE) reproducibility of multiwalled carbon nanotubes (MWCNTs) developed through plasma enhanced chemical vapor deposition as reported by Zou et al The FE repeatability improved with ageing due to the increased number and better equally distributed shorter MWCNTs in order to become dominant emitters, which will ultimately result in an improvement in FE repeatability. 118 C. Cantalini et al conducted an investigation and developed carbon nanotubes (CNTs) thin films produced by plasma accelerated chemical vapor deposition on silicon/silicon nitride (Si/Si 3 N 4 ) substrates supplied with platinum interdigital electrodes have been explored as resistive gas sensors for nitrogen Functionalized CNTs deposited at a reduced level in liver, kidney, and lung. When compared to the intervention with pristine CNTs, the conjugated treatment resulted in a larger proportion of arthritis suppression.…”

Section: Reproducibility Of Carbon Nanotubesmentioning

confidence: 99%

Carbon Nanotubes: An Optimistic Nanomaterial with Superfluity Characteristics in Drug Delivery for the Treatment of Arthritis

Srinivasan¹,

Palanisamy²

2022

Ind. J. Pharm. Edu. Res

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Arthritis is chronic disease that affects the joint system and induces pain and inflammation in human body. Nanotechnology based drug delivery has progressed to be viable and more attractive for the treatment of arthritis. A carbon nanotube is one of the foremost prominent nanomaterials with high surface area utilized to exhibit stable release of drugs. Nonetheless, researchers have done investigations using either single-walled carbon nanotubes (SWCNT) or multi-walled carbon nanotubes (MWCNT) to gain optimistic results in targeted delivery for arthritis disorder. In this view, functionalized carbon nanotubes are employed to deliver drugs with higher accuracy and controlled release of drugs with less toxic effects. Unfortunately, very limited investigations are reported the prospective utilization of functionalized carbon nanotubes as eminent drug carriers for arthritis treatment. Moreover, the amounts of toxicity of carbon nanotubes, as well as their aggregation in cells and tissues are the key limits that must be considered evidently. The biosafety exposure of carbon nanotubes to humans are still a source of concern. As a result, more research is needed to solve the obstacles associated with carbon nanotubes in conjugation with drugs such as agglomeration, lack of solubility and interaction mechanism with drugs. In this review, we discussed the significant characteristics and outcomes of carbon nanotubes in drug delivery for the treatment of arthritis disease. The toxic level of carbon nanotubes is projected and why the incorporation of CNTs in drug delivery is still limited in various phases is highlighted. The biosafety aspects, cellular uptake mechanism and the importance of functionalization carbon nanotubes in drug delivery are reviewed.

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Section: Reproducibility Of Carbon Nanotubesmentioning

confidence: 99%

Carbon Nanotubes: An Optimistic Nanomaterial with Superfluity Characteristics in Drug Delivery for the Treatment of Arthritis

Srinivasan¹,

Palanisamy²

2022

Ind. J. Pharm. Edu. Res

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“…As the aging time continues, at high currents, only a small amount of the CNT emitter from the non-uniform structure takes up the majority of the emission current, whereas surplus emission current incurs the destruction of these CNTs, which makes the current unstable. In addition, relatively weak CNT emitters are removed by resistive heating during electrical aging at high currents [10,11,12,13,14,15,16,17,18,19,20]. Thus, the aging allowed a relatively larger number, and more evenly distributed shorter multi-walled carbon nanotubes (MWCNTs) to become dominating emitters resulting in improving the field emission (FE) reproducibility [21,22].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Stable Carbon Nanotube Cold Cathode Electron Emitters with Post-Growth Electrical Aging

2018

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We fabricated carbon nanotube (CNT) cold cathode emitters with enhanced and stable electron emission properties and long-time stability with electrical aging as a post-treatment. Our CNT field emitters showed improved electrical properties by electrical aging. We set the applied bias for effective electrical aging, with the bias voltage defined at the voltage where Joule heating appeared. At the initial stage of aging, the electron emission current started to increase and then was saturated within 3 h. We understood that 5 h aging time was enough at proper aging bias. If the aging bias is higher, excessive heating damages CNT emitters. With the electrical aging, we obtained improved electron emission current from 3 mA to 6 mA. The current of 6 mA was steadily driven for 9 h.

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“…[1] Large current density, high aspect ratio, sharp tip, high melting point, chemical inertness and vacuum compatibility make the CNTs a tremendous material for field emitters. [2][3][4][5][6] With these amazing and excellent properties, the CNTs have potential applications in many nanoscale-based field emission devices such as screen display, X-rays, cathode ray oscilloscope, scanning electron microscope (SEM) and electron beam evaporators. [7][8][9][10][11] The CNTs based vacuum microelectronic and display devices have already been proposed.…”

Section: Introductionmentioning

confidence: 99%

Improved field emission properties of carbon nanotubes by dual layer deposition

Parveen

Husain

Kumar

et al. 2013

Journal of Experimental Nanoscience

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In this paper, we tried to increase the current density of carbon nanotubes (CNTs) by depositing double layer of CNTs instead of single layer. Both the layers of CNTs are deposited by the low pressure chemical vapour deposition technique on silicon substrate with Fe catalyst. Scanning electron microscopic images show the surface morphology of single and double layer of CNTs. Dual layer deposition of CNTs is a very simple and easy method to increase the current density of CNTs based field emitters than other conventional methods. Excellent field emission properties of double layer of CNTs are exhibited with large field enhancement factor and low turn-on voltage as compared to those for single layer of CNTs. High current density of CNTs is required for field-emission-based display devices associated with field enhancement factor and number of emitting electrons. Therefore, we may say that dual layer deposition of CNTs can be utilised as an alternative approach to improve the current density for field emitters. Stability measurement of the samples was also performed for 3 h (180 min) with current at constant applied voltage, and it was found that the stability of dual layer of CNTs is remarkable than that of single layer of CNTs.

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Ageing effect on the field emission reproducibility of multiwalled carbon nanotubes

Cited by 6 publications

References 30 publications

Carbon Nanotubes: An Optimistic Nanomaterial with Superfluity Characteristics in Drug Delivery for the Treatment of Arthritis

Carbon Nanotubes: An Optimistic Nanomaterial with Superfluity Characteristics in Drug Delivery for the Treatment of Arthritis

Fabrication of Stable Carbon Nanotube Cold Cathode Electron Emitters with Post-Growth Electrical Aging

Improved field emission properties of carbon nanotubes by dual layer deposition

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