Direct growth of single-walled carbon nanotubes on substrates

Peng, Fei; Liu, Yu; Cui, Rongli; Gao, Dongliang; Yang, Feng; Li, Yan

doi:10.1007/s11434-011-4919-8

Cited by 13 publications

(11 citation statements)

References 29 publications

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“…Because quartz substrate was not friendly to Raman characterization, the SWNTs was transferred onto SiO 2 /Si substrates using the peel-off method [26]. The RBM band shown in Figure 3(a) corresponds to a (7,6) SWNT with the diameter of 0.895 nm. The weak intensity of the D-band shows the high-quality of the small diameter SWNT.…”

Section: Characterizationmentioning

confidence: 99%

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Diameter-controlled growth of aligned single-walled carbon nanotubes on quartz using molecular nanoclusters as catalyst precursors

et al. 2013

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Molecular nanoclusters containing Fe and Mo atoms have been used as catalyst precursors for the growth of single-walled carbon nanotubes (SWNTs) on stable temperature (ST)-cut quartz substrates by chemical vapor deposition. Attribute to the uniform catalyst nanoparticles and the confinement effect of the crystalline substrates, well-aligned SWNTs with narrow diameter distribution have been synthesized. Atomic force microscopy measurements show that the mean diameter of the nanotubes obtained by thermal decomposition of ethanol at 900°C is 0.76 ± 0.16 nm, which is the smallest among all reported results for aligned SWNTs. The mean diameter of the nanotubes increases with growth temperature. In addition to using identical nanoclusters as the catalyst precursors, the avoidance of annealing treatment of catalyst precursors is also a key point for obtaining SWNTs with controlled diameters. Using these identical nanoclusters as catalyst precursors and carefully tuning the growth parameters make us closer to the ultimate goal of controlling the chirality of SWNTs. molecular nanoclusters, single-walled carbon nanotubes, diameter control, quartz, catalysts Citation:Peng F, Luo D, Sun H, et al. Diameter-controlled growth of aligned single-walled carbon nanotubes on quartz using molecular nanoclusters as catalyst precursors.

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Section: Characterizationmentioning

confidence: 99%

“…Chemical vapor deposition (CVD) seems a promising method for the direct growth of SWNTs on substrates which are immediately ready for building devices [5]. The direct growth processes prevent SWNTs from being damaged and contaminated, which are inevitable during the purification and dispersing treatment of the bulk-form SWNTs [6].…”

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Diameter-controlled growth of aligned single-walled carbon nanotubes on quartz using molecular nanoclusters as catalyst precursors

et al. 2013

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“…The other method is to eliminate m-CNT from solution by the reaction between diazonium salt of 4-heptadecafluorooc tylaniline and m-CNT and then extracting s-CNT after chemical reaction [5], and another method is to separate s-CNT from m-CNT by centrifugation with different chemical modification of surfactant on CNT of different electrical properties [6,7]. However, no matter whether preparing CNT with pure electrical properties [8] or separating m-CNT from s-CNT, the results still need to be measured and feedback to the process for further improving the methods. To solve the above problem, some scientists proposed several methods to measure CNT's electrical properties.…”

Section: Introductionmentioning

confidence: 99%

The influence of probe lift-up height on CNT electrical properties measurement under EFM DC mode

et al. 2014

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Nowadays, one of the bottlenecks which hinder the development and application of carbon nanotube (CNT) nano device is that no pure semiconducting CNT (s-CNT) or metallic CNT (m-CNT) can be obtained, and for solving this problem scientists proposed some methods on preparation or separation, but all the results still should be detected and feedback to the process for further improving the preparation and separation methods. Thus, it is very important to measure and distinguish the electrical properties of CNT. For that, scientists proposed a method to measure CNT electrical properties based on DC electrostatic force microscope (EFM) mode, which distinguishes m-CNT from s-CNT according to different scan line shape to CNT with different electrical properties. But, we discovered that the probe lift-up height will seriously affect the shape of the scan line, which makes this method not reliable in distinguishing m-CNT from s-CNT. In this paper, the authors deeply researched the influence of probe lift-up height and also gave corresponding theoretical analysis and explanation, which will greatly improve the method of detecting CNT electrical properties by EFM.

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“…The topics cover different areas of CNT study, including their preparation, properties, and application [6][7][8][9][10][11][12][13]. The authors have mainly summarized the progress achieved in the respective research groups.…”

Section: Prefacementioning

confidence: 99%

“…The preparation of different forms of SWCNTs is also discussed. Well-aligned ultralong SWCNTs ready for building nanodevices have been directly grown on substrates by chemical vapor deposition (CVD) [13]. Free-standing SWCNT networks have been fabricated either directly by CVD or arc discharge as well as by post-growth treatment [12].…”

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Preface

Xie

2012

Chin. Sci. Bull.

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PrefaceIn the last two decades, carbon nanotubes (CNTs) have attracted tremendous attention. A CNT can be considered a seamless cylinder formed by rolling up graphene sheets, which are composed of hexagonal sp 2 carbon networks. A single-walled CNT (SWCNT) has only one graphene layer. A multi-walled CNT (MWCNT) consists of a series of concentric graphene layers with an interlayer distance similar to graphite. The unique structure of CNTs endows them with extraordinary properties, for example, superior conductivity of both electricity and heat, outstanding mechanical properties, and excellent chemical and thermal stability. In particular, SWCNTs can behave as semiconductors with a tunable direct band gap determined by their structure. These properties make CNTs an important material both for scientific research and applications.Although tubular carbon nanostructures were observed earlier [1,2], it is the report by Iijima [3] in 1991 that launched the huge interest in CNTs. They observed MWCNTs under a high resolution transmission electron microscope. In 1993, Iijima et al. [4] and Bethune et al. [5] reported the observation and preparation of SWCNTs, respectively. Since then, CNTs have been studied intensively. Chinese scientists entered this field shortly after its beginning and have contributed much. Therefore, we have published this special topic on CNTs to celebrate the twentieth anniversary of CNT research.This special topic contains eight review articles. The topics cover different areas of CNT study, including their preparation, properties, and application [6][7][8][9][10][11][12][13]. The authors have mainly summarized the progress achieved in the respective research groups. CNTs have been prepared using different strategies and obtained in various forms to meet the requirements of different applications. Mass production of bulk-form CNTs with tunable diameter and length has been realized [8]. This is a significant progress in the nanoscale process engineering of CNTs. When using anodic aluminum oxide membranes as templates, the length, diameter and wall thickness of CNTs can be controlled [11]. The preparation of different forms of SWCNTs is also discussed. Well-aligned ultralong SWCNTs ready for building nanodevices have been directly grown on substrates by chemical vapor deposition (CVD) [13]. Free-standing SWCNT networks have been fabricated either directly by CVD or arc discharge as well as by post-growth treatment [12]. A new condensed form of SWCNTs, SWCNT crystals, has been prepared using a series of diamond wire drawing dies [10]. The structure and properties of CNTs have been studied, as well as their various applications. Sc and Y contacts can be used to obtain high performance ballistic n-type field-effect transistors [6]. This resulted in a new doping-free strategy to fabricate CNT-based CMOS devices and integrated circuits. CNTs are also ideal materials for building optoelectronic devices such as light emitters, photodetectors, and photovoltaic devices [7]. SWCNTs can generate electricity...

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Direct growth of single-walled carbon nanotubes on substrates

Cited by 13 publications

References 29 publications

Diameter-controlled growth of aligned single-walled carbon nanotubes on quartz using molecular nanoclusters as catalyst precursors

Diameter-controlled growth of aligned single-walled carbon nanotubes on quartz using molecular nanoclusters as catalyst precursors

The influence of probe lift-up height on CNT electrical properties measurement under EFM DC mode

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