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Fabrication of functional micro- and nanoneedle electrodes using a carbon nanotube template and electrodeposition.

An T, Choi W, Lee E, Kim IT, Moon W, Lim G - Nanoscale Res Lett (2011)

Bottom Line: Carbon nanotube (CNT) is an attractive material for needle-like conducting electrodes because it has high electrical conductivity and mechanical strength.However, CNTs cannot provide the desired properties in certain applications.Through electrodeposition, Au, Ni, and polypyrrole were each coated successfully onto CNT nanoneedle electrodes to obtain the desired properties.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea. limmems@postech.ac.kr.

ABSTRACT
Carbon nanotube (CNT) is an attractive material for needle-like conducting electrodes because it has high electrical conductivity and mechanical strength. However, CNTs cannot provide the desired properties in certain applications. To obtain micro- and nanoneedles having the desired properties, it is necessary to fabricate functional needles using various other materials. In this study, functional micro- and nanoneedle electrodes were fabricated using a tungsten tip and an atomic force microscope probe with a CNT needle template and electrodeposition. To prepare the conductive needle templates, a single-wall nanotube nanoneedle was attached onto the conductive tip using dielectrophoresis and surface tension. Through electrodeposition, Au, Ni, and polypyrrole were each coated successfully onto CNT nanoneedle electrodes to obtain the desired properties.

No MeSH data available.


Related in: MedlinePlus

SEM image of the Au coated carbon nanotube nanoneedle. (a) Carbon nanotube nanoneedle before Au nanoparticle coating and (b) after Au nanoparticle coating (scale bar: 5 μm). (c) Magnified view of Au nanoparticle-coated nanoneedle (scale bar: 200 nm). (d) EDS spectrum of Au nanoparticle-coated nanoneedle.
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Figure 3: SEM image of the Au coated carbon nanotube nanoneedle. (a) Carbon nanotube nanoneedle before Au nanoparticle coating and (b) after Au nanoparticle coating (scale bar: 5 μm). (c) Magnified view of Au nanoparticle-coated nanoneedle (scale bar: 200 nm). (d) EDS spectrum of Au nanoparticle-coated nanoneedle.

Mentions: The surface of micro- and nanoneedles must be modified easily with various materials to add functionalities. For the fabrication of functional micro- and nanoneedles, Au, Ni, and PPy were successfully coated on the CNT nanoneedle electrodes using electrodeposition (Figures 3 and 4). The thickness and morphology of the coating material was controlled by the electrodeposition conditions, such as the electric potential, solution concentration, and deposition time.


Fabrication of functional micro- and nanoneedle electrodes using a carbon nanotube template and electrodeposition.

An T, Choi W, Lee E, Kim IT, Moon W, Lim G - Nanoscale Res Lett (2011)

SEM image of the Au coated carbon nanotube nanoneedle. (a) Carbon nanotube nanoneedle before Au nanoparticle coating and (b) after Au nanoparticle coating (scale bar: 5 μm). (c) Magnified view of Au nanoparticle-coated nanoneedle (scale bar: 200 nm). (d) EDS spectrum of Au nanoparticle-coated nanoneedle.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211392&req=5

Figure 3: SEM image of the Au coated carbon nanotube nanoneedle. (a) Carbon nanotube nanoneedle before Au nanoparticle coating and (b) after Au nanoparticle coating (scale bar: 5 μm). (c) Magnified view of Au nanoparticle-coated nanoneedle (scale bar: 200 nm). (d) EDS spectrum of Au nanoparticle-coated nanoneedle.
Mentions: The surface of micro- and nanoneedles must be modified easily with various materials to add functionalities. For the fabrication of functional micro- and nanoneedles, Au, Ni, and PPy were successfully coated on the CNT nanoneedle electrodes using electrodeposition (Figures 3 and 4). The thickness and morphology of the coating material was controlled by the electrodeposition conditions, such as the electric potential, solution concentration, and deposition time.

Bottom Line: Carbon nanotube (CNT) is an attractive material for needle-like conducting electrodes because it has high electrical conductivity and mechanical strength.However, CNTs cannot provide the desired properties in certain applications.Through electrodeposition, Au, Ni, and polypyrrole were each coated successfully onto CNT nanoneedle electrodes to obtain the desired properties.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea. limmems@postech.ac.kr.

ABSTRACT
Carbon nanotube (CNT) is an attractive material for needle-like conducting electrodes because it has high electrical conductivity and mechanical strength. However, CNTs cannot provide the desired properties in certain applications. To obtain micro- and nanoneedles having the desired properties, it is necessary to fabricate functional needles using various other materials. In this study, functional micro- and nanoneedle electrodes were fabricated using a tungsten tip and an atomic force microscope probe with a CNT needle template and electrodeposition. To prepare the conductive needle templates, a single-wall nanotube nanoneedle was attached onto the conductive tip using dielectrophoresis and surface tension. Through electrodeposition, Au, Ni, and polypyrrole were each coated successfully onto CNT nanoneedle electrodes to obtain the desired properties.

No MeSH data available.


Related in: MedlinePlus