Aligning single-wall carbon nanotubes with an alternating-current electric field

ABSTRACTSingle wall carbon nanotubes have aroused a great deal of interest because of their unique combination of electrical, physical and mechanical properties. However, the widespread use of SWNTs in composites and electronic devices is limited because of the difficulty of dispersing and processing these materials. This paper describes a method for depositing and aligning SWNTs from a dispersed solution onto a substrate under the influence of an electric field. Results indicate that SWNTs can be aligned in bulk in the direction of electric field lines, and that individual SWNT ropes may be deposited between two electrodes. The extent and type of deposition depends upon the electrode geometry and processing time. Electrical alignment of SWNTs is an enabling technology allowing manipulation of nanomaterials using standard processing. It could eventually lead to a wide range of products, such as nanocomposites with aligned fillers and nanoelectronic devices.

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Electrical Resistivity of Pristine and Functional Single-Wall Carbon Nanotubes

Journal of Nanomaterials ◽

10.1155/2013/635673 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

Yijiang Lu ◽

Jing Li ◽

Haiping Hong

Keyword(s):

Carbon Nanotubes ◽

Electrical Resistivity ◽

Electric Field ◽

Polymer Nanocomposites ◽

Functional Group ◽

Single Wall Carbon Nanotubes ◽

Electrical Field ◽

Interdigitated Electrode ◽

Single Wall Carbon ◽

Lower Resistivity

The resistance of several pristine and functional single-wall carbon nanotubes (SWNTs) deposited and dried on interdigitated electrode (IDE) chips was investigated to better understand how functional groups influence their resistivity. Without the external electrical field, the resistance was generally increased for the sulfonated and fluorinated SWNTs but not for COOH-SWNTs. With a 3 V electric field applied during depositing, while no change in resistance was found for the purified pristine SWNTs, fluorinated SWNTs, COOH SWNTs, and Ni-SWNTs, a significant decrease in resistance was observed in sulfonated SWNTs and unpurified pristine SWNTs, which could be due to the alignment of SWNTs in an electric field. The alignment of the sulfonated SWNTs is most likely due to the charge of the sulfate functional group. It is interesting to note that the alignment was found in the unpurified pristine SWNTs but not in the purified pristine ones which have lessened resistivity. The lower resistivity in the purified pristine SWNTs may be due to the smaller number (<5%) of impurities. The significance of this research is that hydrophilic COOH-SWNTs could be a better candidate than the hydrophobic pristine SWNTs for being used in many applications, especially in polymer nanocomposites.

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Directed Assembly of Nanoelements Using Electrostatically Addressable Templates

MRS Proceedings ◽

10.1557/proc-0901-ra04-01 ◽

2005 ◽

Vol 901 ◽

Cited By ~ 7

Author(s):

Xugang Xiong ◽

Prashanth Makaram ◽

Kaveh Bakhtari ◽

Sivasubramanian Somu ◽

Ahmed Busnaina ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

Electric Fields ◽

Directed Assembly ◽

Single Wall Carbon Nanotubes ◽

Nanoparticle Assembly ◽

Single Wall Carbon ◽

Ac Electric Fields ◽

Ac Electric Field ◽

Dc Electric Field

AbstractDirected assembly of nanoparticles and single wall carbon nanotubes (SWNTs) using electrostatically addressable templates has been demonstrated. Nanoparticles down to 50 nm are assembled on the Au micro and nanowires of the templates in a DC and AC electric fields. The nanoparticles can be assembled in monolayers and thicker layers. Single wall carbon nanotubes (SWNTs) are also assembled without alignment on Au wires using the nanotemplate. As the size of the template wires is reduced to nanoscale dimensions, an AC electric field proves to be more effective for nanoparticle assembly than a DC electric field.

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21204 Manipulation of single wall carbon nanotubes using AC electric field and capillary thinning flow

The Proceedings of Conference of Kanto Branch ◽

10.1299/jsmekanto.2013.19.541 ◽

2013 ◽

Vol 2013.19 (0) ◽

pp. 541-542

Author(s):

Kohei Obuchi ◽

Hiromichi Obara ◽

Darsono Nono ◽

Hiroshi Mizunuma

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon ◽

Ac Electric Field ◽

Capillary Thinning

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Alignment and Deposition of Single Wall Carbon Nanotubes under the Influence of an Electric Field

MRS Proceedings ◽

10.1557/proc-741-j8.5 ◽

2002 ◽

Vol 741 ◽

Author(s):

Paul Jaynes ◽

Thomas Tiano ◽

Margaret Roylance ◽

Charles Carey ◽

Kenneth McElrath

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

Electronic Devices ◽

Physical And Mechanical Properties ◽

Single Wall Carbon Nanotubes ◽

Enabling Technology ◽

Single Wall Carbon ◽

Nanoelectronic Devices ◽

Wide Range ◽

Field Lines

ABSTRACTSingle wall carbon nanotubes have aroused a great deal of interest because of their unique combination of electrical, physical and mechanical properties. However, the widespread use of SWNTs in composites and electronic devices is limited because of the difficulty of dispersing and processing these materials. This paper describes a method for depositing and aligning SWNTs from a dispersed solution onto a substrate under the influence of an electric field. Results indicate that SWNTs can be aligned in bulk in the direction of electric field lines, and that individual SWNT ropes may be deposited between two electrodes. The extent and type of deposition depends upon the electrode geometry and processing time. Electrical alignment of SWNTs is an enabling technology allowing manipulation of nanomaterials using standard processing. It could eventually lead to a wide range of products, such as nanocomposites with aligned fillers and nanoelectronic devices.

Download Full-text