A Method to Fabricate Field Emitters Using Electroless Codeposited Composite of MWNTs and Nickel

Liu, Yih-Ming; Sung, Youngje; Chen, Yann-Cheng; Lin, Chuan-Ting; Chou, Yu-Hsien; Ger, Ming-Der

doi:10.1149/1.2749416

Cited by 12 publications

(5 citation statements)

References 16 publications

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“…This technique is mostly developed and employed for Ni-P or Ni-B alloys. 25,[119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134][135][136] There are only a few studies on Co-CNT, 27 Ni-Fe-P alloy 137 and Ni-Cu-P alloy. 136 The very first report of electroless deposition technique was by Chen and co workers 123 on a Co-CNT system to prepare 1D nanostructures for magnetic recording.…”

Section: Electroless Depositionmentioning

confidence: 99%

“…Hence, the bath temperature and pH value plays a very critical role in the coating composition and morphology. Most of the studies on Ni-P-CNT composites have used a pH value in the range of 4?5-5 whereas the temperature was between 353 and 361 K. 122,[124][125][126][127][131][132][133][134][135] Some of the studies have tried to correlate the concentration of CNT in the coating with that in the bath. 125,129,131,136 The bath compositions were optimised to obtain a maximum CNT concentration.…”

Section: Electroless Depositionmentioning

confidence: 99%

“…Ni-CNT composites have also shown their capability to be used as field emission displays, showing uniform images with improved quality. 132 Chai et al 115 have used arrays of CNTs as the matrixes to fill Cu in the channels and thus form a Cu-CNT composite for the interconnect applications. Few studies have reported use of Si-CNT composites as the anode materials for Li-ion batteries, but CNT addition in Si was not related to improvement in electrical properties.…”

Section: Electrical and Electronic Propertiesmentioning

confidence: 99%

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Carbon nanotube reinforced metal matrix composites - a review

Bakshi

Lahiri

Agarwal

2010

International Materials Reviews

1,299

505

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This review summarises the research work carried out in the field of carbon nanotube (CNT) metal matrix composites (MMCs). Much research has been undertaken in utilising CNTs as reinforcement for composite material. However, CNT-reinforced MMCs have received the least attention. These composites are being projected for use in structural applications for their high specific strength as well as functional materials for their exciting thermal and electrical characteristics. The present review focuses on the critical issues of CNT-reinforced MMCs that include processing techniques, nanotube dispersion, interface, strengthening mechanisms and mechanical properties. Processing techniques used for synthesis of the composites have been critically reviewed with an objective to achieve homogeneous distribution of carbon nanotubes in the matrix. The mechanical property improvements achieved by addition of CNTs in various metal matrix systems are summarised. The factors determining strengthening achieved by CNT reinforcement are elucidated as are the structural and chemical stability of CNTs in different metal matrixes and the importance of the CNT/metal interface has been reviewed. The importance of CNT dispersion and its quantification is highlighted. Carbon nanotube reinforced MMCs as functional materials are summarised. Future work that needs attention is addressed.

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Section: Electroless Depositionmentioning

confidence: 99%

Section: Electroless Depositionmentioning

confidence: 99%

Section: Electrical and Electronic Propertiesmentioning

confidence: 99%

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Carbon nanotube reinforced metal matrix composites - a review

Bakshi

Lahiri

Agarwal

2010

International Materials Reviews

1,299

505

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“…By contrast, the composite plating of CNTs with Ni can achieve large area with well adhesion, and suppress the degradation of CNT emission tips. 13 In this case, the hydrophobic property of CNTs, which causes poor dispersion of CNTs in the electrobath, needs to be further resolved.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Carbon Nanotubes Field Emission Cathode by Composite Plating

Wang

Lin²,

Tzeng³

2010

J. Nanosci. Nanotech.

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Carbon nanotubes (CNTs) have high aspect ratio and have great potential to be applied as the field emission cathode because of its large field enhancement factor. In this work, a high performance carbon nanotube field emission cathode (CNTFC) was fabricated by using a composite plating method. The CNTs were purified by acid solutions and then dispersed in electrobath with nickel ions at temperatures of 60, 70, or 80 C for the electroless plating process on glass substrate. The resulting CNT-Ni composite film has strong adhesion on the glass substrate. The degree of graphitization and the microstructure of the CNTFCs were studied by Raman spectroscopy and scanning electron microscopy. The field emission properties of the CNTFCs show a low turn-on electric field E on of about 1.2 V/ m, and a low threshold electric field E th of about 1.9 V/ m. Such a composite plating method could be applied to the fabrication of large area CNT field-emission displays.

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“…[1][2][3] CNTs have several properties that make them useful as field emitters, such as a high aspect ratio, high chemical stability, high thermal conductivity, and high mechanical strength, and over the past several years a great deal of effort has been devoted to investigating the field emission properties of CNTs. [1][2][3][4][5][6][7][8][9] Among the main methods used to fabricate CNT field emitters are the direct-growth 4 and screen printing 5,6 methods. The direct-growth method by chemical vapor deposition has several disadvantages, including difficulties in controlling each CNT, the complexity of the fabrication process, and the high growth temperatures that are required.…”

mentioning

confidence: 99%

Fabrication and Field Emission Properties of Spray-Deposited RNA–Carbon Nanotube Films

Cho

Lee²,

Kim

et al. 2009

Electrochem. Solid-State Lett.

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Carbon nanotubes ͑CNTs͒ were effectively dispersed and functionalized by being wrapped with RNA. The RNA-CNT hybrids attached strongly to an indium tin oxide ͑ITO͒ glass substrate and formed a uniform film, making it possible to use field emitters for field emission applications. An electron field emission cathode was fabricated with a spray method using these RNA-CNT hybrids. Well-defined RNA-CNT patterns were obtained on the ITO glass substrate. The cathode showed a uniform emission pattern across the entire surface and also exhibited a high current density. The RNA-CNT hybrids compared favorably to other factionalized CNTs for use in the spray method.Electron field emitters based on carbon nanotubes ͑CNTs͒ are currently being studied as potential next-generation cold cathode materials, particularly for use in flat panel field emission displays. 1-3 CNTs have several properties that make them useful as field emitters, such as a high aspect ratio, high chemical stability, high thermal conductivity, and high mechanical strength, and over the past several years a great deal of effort has been devoted to investigating the field emission properties of CNTs. 1-9 Among the main methods used to fabricate CNT field emitters are the direct-growth 4 and screen printing 5,6 methods. The direct-growth method by chemical vapor deposition has several disadvantages, including difficulties in controlling each CNT, the complexity of the fabrication process, and the high growth temperatures that are required. By contrast, the screen printing method is a more effective technology for large-scale production, and it has the advantages of low cost and a simple process. It has several technical limitations, including poor adhesion between the CNT film and the substrate, the nonuniform dispersion of CNT powders, poor uniformity of emission, and short lifetimes. Because each of these methods has disadvantages, it makes sense to consider alternative approaches such as the spray method. 9 This method offers an easy and convenient way of depositing CNTs for cathodes; it can deposit CNTs over large areas and it can suppress the degradation of the emission tips. The main disadvantages of this method are the weak adhesion of CNTs to the substrate, the low dispersability of CNTs, and the difficulty in forming micropatterns. Lim et al. proposed a method for fabricating CNT-based field emitters using the spray method. 9 The method provides enhanced adhesion between the CNTs and substrate by using a low melting point metal such as indium and tin. However, the method still has the problems of insufficient uniformity in the deposited layer and difficulty performing the micropatterning that is necessary for high resolution arrays.To get around these issues, we suggest using an alternative strategy involving RNA-CNT hybrids 10,11 as the stable suspension for the spray method. These hybrids consist of CNTs coated with a self-assembled monolayer of RNA. 12 Single-walled carbon nanotubes ͑SWNTs͒ could not only be dispersed thoroughly in an aqueous solut...

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A Method to Fabricate Field Emitters Using Electroless Codeposited Composite of MWNTs and Nickel

Cited by 12 publications

References 16 publications

Carbon nanotube reinforced metal matrix composites - a review

Carbon nanotube reinforced metal matrix composites - a review

Fabrication of Carbon Nanotubes Field Emission Cathode by Composite Plating

Fabrication and Field Emission Properties of Spray-Deposited RNA–Carbon Nanotube Films

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