Aligned, Ultralong Single‐Walled Carbon Nanotubes: From Synthesis, Sorting, to Electronic Devices

Liu, Zhongfan; Jiao, Liying; Yao, Yagang; Xian, Xiaojun; Zhang, Jin

doi:10.1002/adma.200904167

Cited by 125 publications

(89 citation statements)

References 162 publications

(363 reference statements)

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“…Carbon nanotubes (CNTs) are new carbon materials and have found many applications in a wide areas such as adsorption, separation, catalysis, sensors, biomedicine and electronic devices [9][10][11][12][13][14]. Due to their large specific surface area, small pore size, hollow and layered structures, carbon nanotubes have been proven to possess a great potential as superior adsorbents for removing many kinds of organic and inorganic contaminants from aqueous solution [15].…”

Section: Introductionmentioning

confidence: 99%

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Wang

et al. 2012

Chemical Engineering Journal

204

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h i g h l i g h t s" Adsorption of methylene blue and acid red 183 on a MWCNT in single and binary dye systems was investigated. " MWCNT shows higher adsorption capacity to methylene blue in both systems. " A synergistic effect for basic and acid dyes occurs in a binary dye system. t r a c tA multiwalled carbon nanotube (MWCNT) was used as an adsorbent for removal of a cationic dye (methylene blue, MB) and acid dye (acid red 183, AR183) from aqueous solution in single and binary dye systems. Characterization of the MWCNT and MWCNT-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis (TG-DTA), zeta potential and elemental analysis. Adsorption tests showed that the MWCNT presented higher adsorption of MB than AR183 in single and binary dye systems, revealing that p-p stacking is the main driving force responsible for the dye-MWCNT interaction. In single dye systems, the MWCNT presented the maximum adsorption capacities of MB and AR183 at 59.7 and 45.2 mg/g, respectively. In a binary dye system, a synergistic effect due to electronic attraction between MB and AR183 was found at low AR183 concentration (10 mg/L), which promotes the adsorption of both dyes on the MWCNT. However, MB adsorption could be reduced at higher AR183 concentration (>20 mg/L) due to a strong electrostatic attraction between MWCNT-AR183.

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Section: Introductionmentioning

confidence: 99%

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Wang

et al. 2012

Chemical Engineering Journal

204

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“…Since reliability, cost and yield determine commercialization of NW/NT based nanodevices, a reliable, low-cost and efficient assembly method, which is capable of NW assembly with reasonable alignment, density, uniformity and even controllable types, is essential for the prosperity of nanodevices. Till now, researchers have developed a variety of NW/NT assembly methods on various substrates, which can generally be categorized as two strategies [1][2][3][4][5][6][7][8][9]: (1) Alignment-after-Growth, which means, the NWs are assembled on substrates after synthesis; (2) Alignment-during-growth, which means, the NWs are assembled and aligned directly during the synthesis process. For example, by pre-defining the locations of catalyst and growth space of the NWs [10][11][12][13], applying electric field in the seeded growth system [14][15], applying directional air flow in the growth system [16][17], or directly on a surface based on physical atomic structures [18][19][20][21][22][23][24][25][26][27][28], by electrospinning [29][30][31], or superaligning [32][33], NWs can be aligned as grown simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Directed Assembly of Nanowires or Nanotubes

Liu

Lau

et al. 2012

Nano-Micro Lett.

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Nanowires and nanotubes of diverse material compositions, properties and/or functions have been produced or fabricated through various bottom-up or top-down approaches. These nanowires or nanotubes have also been utilized as potential building blocks for functional nanodevices. The key for the integration of those nanowire or nanotube based devices is to assemble these one dimensional nanomaterials to specific locations using techniques that are highly controllable and scalable. Ideally such techniques should enable assembly of highly uniform nanowire/nanotube arrays with precise control of density, location, dimension or even material type of nanowire/nanotube. Numerous assembly techniques are being developed that can quickly align and assemble large quantities of one type or multiple types of nanowires through parallel processes, including flow-assisted alignment, Langmuir-Blodgett assembly, bubble-blown technique, electric/magnetic-field directed assembly, contact/roll printing, knocking-down, etc.. With these assembling techniques, applications of nanowire/nanotube based devices such as flexible electronics and sensors have been demonstrated. This paper delivers an overall review of directed nanowire assembling approaches and analyzes advantages and limitations of each method. The future research directions have also been discussed.

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“…To date, the only effective method to prepare these materials is with gas-flow-directed CVD on a Si substrate [9,10,24,25]. In this method, catalyst particles catalyze the decomposition of the carbon source to provide carbon atoms and the gas flow provides the buoyancy for suspended tubes to grow without resistance.…”

Section: Super-long Cnt Productionmentioning

confidence: 99%

“…Many other articles have reviewed the growth of singleand multi-walled carbon nanotubes, using either arc discharge, laser ablation, or catalytic CVD techniques [4][5][6][7][8][9][10][11][12][13][14][15][16].…”

mentioning

confidence: 99%

A review of the large-scale production of carbon nanotubes: The practice of nanoscale process engineering

et al. 2011

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Carbon nanotubes (CNTs) are nanomaterials that have attracted great research interest because of their unique properties and promising applications. The controllable synthesis of CNTs is a precondition for their broad application. In this review, we consider nanoscale process engineering and assess recent progress in the mass production of ultra-long, inexpensive CNTs with good alignment as well as tunability in wall number and diameter for fundamental and engineering science applications across multiple scales. Cutting-edge nanoscale process engineering research in the areas of physics, chemistry, materials, engineering, ecology, and social science will allow us to obtain high added value and multi-functional advanced CNTs. The synthesis of CNTs with controllable chirality, good-alignment, and predetermined sizes and lengths still presents great challenges. Through multidisciplinary scientific research, advanced CNT-based materials will promote the development of a sustainable society. According to the wall number of a CNT, it can be classified as a SWCNT, double-walled CNT (DWCNT), triple-walled CNT (TWCNT), or multi-walled CNT (MWCNT). Because of the covalent sp 2 bonds between individual carbon atoms, a nanotube can have a Young's modulus between 1.2-5.5 TPa, a tensile strength about a hundred times greater than that of steel, and can tolerate large strains before mechanical failure. A CNT can be a metal, semiconductor, or small-gap semiconductor. The state of the CNT depends heavily on the (m, n) indices, and, therefore, on the diameter and chirality. CNTs also possess tunable surfaces characteristics, well-defined hollow interiors, and high biocompatibility with living systems. Based on these properties, many potential applications, including both large-volume applications (such as conductive, electromagnetic, microwave absorbing, high-strength composites; super capacitor, or battery electrodes; catalyst and catalyst support; field emission displays; and transparent conducting films) and limited-volume applications (such as scanning probe tips; drug delivery systems; electronic devices; sensors; and actuators) have been proposed [2]. Controllable mass production of CNTs with the desired structures and properties is essential for future applications. In the past 20 years, arc discharge, laser ablation, and chemical vapor deposition (CVD) methods have been developed to produce CNTs in sizeable quantities. In CVD methods, the catalytic decomposition of a carbon feedstock into carbon and hydrogen atoms is initiated on an active catalyst surface, where the tubular CNTs grown. CVD growth can be achieved under mild conditions (such as normal pressure

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Aligned, Ultralong Single‐Walled Carbon Nanotubes: From Synthesis, Sorting, to Electronic Devices

Cited by 125 publications

References 162 publications

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Recent Advances in Directed Assembly of Nanowires or Nanotubes

A review of the large-scale production of carbon nanotubes: The practice of nanoscale process engineering

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