Large-scale assembly of carbon nanotubes

Rao, Saleem G.; Huang, Ling; Setyawan, Wahyu; Hong, Seok Hoon

doi:10.1038/425036a

Cited by 458 publications

(376 citation statements)

References 13 publications

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“…The realization of flexible and transparent NWTs could also enable high-resolution and lowpower consumption products such as head-up displays. Although challenges remain in the precise control of nanowire positions and orientations on large-scale substrates for NWT integration, promising advances have recently been reported [42][43][44][45] . For example, one report has demonstrated greater than 90% yield for the assembly of single-walled carbon nanotubes in desired positions 42 .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of fully transparent nanowire transistors for transparent and flexible electronics

et al. 2007

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Section: Resultsmentioning

confidence: 99%

Fabrication of fully transparent nanowire transistors for transparent and flexible electronics

et al. 2007

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“…Transistors and small-scale, simple digital logic devices that rely on individual SWNTs confirm this promise (7)(8)(9), through benchmarking studies conducted at low frequencies against single-crystal silicon (10). Scalable integration of SWNTs into digital circuits is challenging, although recent work with assembled individual tubes as active elements, or relatively dense, horizontally aligned arrays of tubes as thin film type semiconductors both show some promise (11)(12)(13)(14)(15)(16)(17)(18). Nevertheless, the development of SWNTs for a digital electronics technology that could compete with silicon is daunting.…”

mentioning

confidence: 95%

Radio frequency analog electronics based on carbon nanotube transistors

Kocabaş¹,

Kim

Banks

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

183

123

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The potential to exploit single-walled carbon nanotubes (SWNTs) in advanced electronics represents a continuing, major source of interest in these materials. However, scalable integration of SWNTs into circuits is challenging because of difficulties in controlling the geometries, spatial positions, and electronic properties of individual tubes. We have implemented solutions to some of these challenges to yield radio frequency (RF) SWNT analog electronic devices, such as narrow band amplifiers operating in the VHF frequency band with power gains as high as 14 dB. As a demonstration, we fabricated nanotube transistor radios, in which SWNT devices provide all of the key functions, including resonant antennas, fixed RF amplifiers, RF mixers, and audio amplifiers. These results represent important first steps to practical implementation of SWNTs in high-speed analog circuits. Comparison studies indicate certain performance advantages over silicon and capabilities that complement those in existing compound semiconductor technologies.

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“…One promising approach to overcoming these limitations is to use patterned chemical templates to assemble SWNTs from solutions. For example, SWNTs have been successfully positioned along straight line features comprised of amine-terminated self-assembled monolayers (SAMs) (9,(24)(25)(26)(27). Thus far, however, no one has demonstrated the ability to simultaneously control the position, shape, and linkage of SWNTs on the sub-m scale.…”

mentioning

confidence: 99%

Controlling the shape, orientation, and linkage of carbon nanotube features with nano affinity templates

Wang

Maspoch

Zou

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

209

193

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Directed assembly of nanoscale building blocks such as singlewalled carbon nanotubes (SWNTs) into desired architectures is a major hurdle for a broad range of basic research and technological applications (e.g., electronic devices and sensors). Here we demonstrate a parallel assembly process that allows one to simultaneously position, shape, and link SWNTs with sub-100-nm resolution. Our method is based on the observation that SWNTs are strongly attracted to COOH-terminated self-assembled monolayers (COOH-SAMs) and that SWNTs with lengths greater than the dimensions of a COOH-SAM feature will align along the boundary between the COOH-SAM feature and a passivating CH3-terminated SAM. By using nanopatterned affinity templates of 16-mercaptohexadecanonic acid, passivated with 1-octadecanethiol, we have formed SWNT dot, ring, arc, letter, and even more sophisticated structured thin films and continuous ropes. Experiment and theory (Monte Carlo simulations) suggest that the COOH-SAMs localize the solvent carrying the nanotubes on the SAM features, and that van der Waals interactions between the tubes and the COOH-rich feature drive the assembly process. A mathematical relationship describing the geometrically weighted interactions between SWNTs and the two different SAMs required to overcome solvent-SWNT interactions and effect assembly is provided.self-assembly ͉ rings ͉ structured thin films ͉ Monte Carlo simulations S ingle-walled carbon nanotubes (SWNTs) show promise for applications ranging from ultra-small electronic and sensing devices to multifunctional materials (1). To date, a number of SWNT-based proof-of-concept devices (2-7) such as field effect transistors (2), field emission displays (7), and chemical sensors (3, 6) have been fabricated, and the integration of the nanotube materials in all cases relies on one's ability to control the placement, orientation, and shape of the nanotube components within the context of the device on the micrometer-to nanometer-length scale. Such positional control over large areas is extremely challenging and currently quite limited. Depending on the intended application, one wants to be able to pattern SWNTs as individual tubes (3, 4), small bundles (5), or thin films (6,8,9). Previous studies have shown that individual carbon nanotubes can be positioned (10), bent (11), and even welded (12) with nanometer accuracy by using scanning probe instruments. This level of manipulation is limited to serial and therefore slow processes that span relatively short distances (100 m). Other assembly methods such as Langmuir-Blodgett techniques (13), external field assisted routes (14-19), electrospinning (20), transfer printing (21), and DNA templates (22, 23) also have been explored for nanotube assembly. These parallel methods address the speed limitation posed by conventional scanning probe techniques, but thus far are quite limited with respect to registration control and have demonstrated only coarse placement capabilities. One promising approach to overcoming these limitations i...

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Large-scale assembly of carbon nanotubes

Cited by 458 publications

References 13 publications

Fabrication of fully transparent nanowire transistors for transparent and flexible electronics

Fabrication of fully transparent nanowire transistors for transparent and flexible electronics

Radio frequency analog electronics based on carbon nanotube transistors

Controlling the shape, orientation, and linkage of carbon nanotube features with nano affinity templates

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