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Fabrication Route for the Production of Coplanar, Diamond Insulated, Boron Doped Diamond Macro- and Microelectrodes of any Geometry

Fabrication Route for the Production of Coplanar, Diamond Insulated, Boron Doped Diamond Macro- and Microelectrodes of any Geometry
Fabrication Route for the Production of Coplanar, Diamond Insulated, Boron Doped Diamond Macro- and Microelectrodes of any Geometry


Highly doped, boron doped diamond (BDD) is an electrode material with great potential, but the fabrication of suitable electrodes in a variety of different geometries both at the macro- and microscale, with an insulating material that does not compromise the material properties of the BDD, presents technical challenges. In this Technical Note, a novel solution to this problem is presented, resulting in the fabrication of coplanar macro- and microscale BDD electrodes, insulated by insulating diamond, at the single and multiple, individually addressable level. Using a laser micromachining approach, the required electrode(s) geometry is machined into an insulating diamond substrate, followed by overgrowth of high quality polycrystalline BDD (pBDD) and polishing to reveal approximately nanometer roughness, coplanar all-diamond structures. Electrical contacting is possible using both top and bottom contacts, where the latter are defined using the laser to produce non-diamond-carbon (NDC) in the vicinity of the back side of the BDD. We present the fabrication of individually addressable ring, band, and disk electrodes with minimum, reproducible controlled dimensions of 50 μm (limited only by the laser system employed). The pBDD grown into the insulating diamond recesses is shown to be free from NDC and possesses excellent electrochemical properties, in terms of extended solvent windows, electrochemical reversibility, and capacitance.
0003-2700
5238-5244
Joseph, Maxim B.
ede92259-7a24-4f8d-b2b2-964675db9e5b
Bitziou, Eleni
d99ded97-0f0a-41a2-a320-a927955f21a2
Read, Tania L.
1330f306-5256-4bbe-a6b9-34403e468c8c
Meng, Lingcong
8de7a0cb-c6aa-4dfd-94f5-bcdae5105a56
Palmer, Nicola L.
5561260c-4012-45c1-91b4-c17ba0189c9a
Mollart, Tim P.
83804f0e-c1a5-41aa-865a-59cc4403fe12
Newton, Mark E.
2ff6cc90-cd0f-4682-a936-7fd30d981874
Macpherson, Julie V.
0e1f723d-bd4e-497a-9ac9-4971c6dcace0
Joseph, Maxim B.
ede92259-7a24-4f8d-b2b2-964675db9e5b
Bitziou, Eleni
d99ded97-0f0a-41a2-a320-a927955f21a2
Read, Tania L.
1330f306-5256-4bbe-a6b9-34403e468c8c
Meng, Lingcong
8de7a0cb-c6aa-4dfd-94f5-bcdae5105a56
Palmer, Nicola L.
5561260c-4012-45c1-91b4-c17ba0189c9a
Mollart, Tim P.
83804f0e-c1a5-41aa-865a-59cc4403fe12
Newton, Mark E.
2ff6cc90-cd0f-4682-a936-7fd30d981874
Macpherson, Julie V.
0e1f723d-bd4e-497a-9ac9-4971c6dcace0

Joseph, Maxim B., Bitziou, Eleni, Read, Tania L., Meng, Lingcong, Palmer, Nicola L., Mollart, Tim P., Newton, Mark E. and Macpherson, Julie V. (2014) Fabrication Route for the Production of Coplanar, Diamond Insulated, Boron Doped Diamond Macro- and Microelectrodes of any Geometry. Analytical Chemistry, 86 (11), 5238-5244. (doi:10.1021/ac501092y).

Record type: Article

Abstract



Highly doped, boron doped diamond (BDD) is an electrode material with great potential, but the fabrication of suitable electrodes in a variety of different geometries both at the macro- and microscale, with an insulating material that does not compromise the material properties of the BDD, presents technical challenges. In this Technical Note, a novel solution to this problem is presented, resulting in the fabrication of coplanar macro- and microscale BDD electrodes, insulated by insulating diamond, at the single and multiple, individually addressable level. Using a laser micromachining approach, the required electrode(s) geometry is machined into an insulating diamond substrate, followed by overgrowth of high quality polycrystalline BDD (pBDD) and polishing to reveal approximately nanometer roughness, coplanar all-diamond structures. Electrical contacting is possible using both top and bottom contacts, where the latter are defined using the laser to produce non-diamond-carbon (NDC) in the vicinity of the back side of the BDD. We present the fabrication of individually addressable ring, band, and disk electrodes with minimum, reproducible controlled dimensions of 50 μm (limited only by the laser system employed). The pBDD grown into the insulating diamond recesses is shown to be free from NDC and possesses excellent electrochemical properties, in terms of extended solvent windows, electrochemical reversibility, and capacitance.

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More information

Published date: 3 June 2014
Organisations: Electrochemistry

Identifiers

Local EPrints ID: 411083
URI: http://eprints.soton.ac.uk/id/eprint/411083
ISSN: 0003-2700
PURE UUID: 4a07405e-d63a-48f4-b476-608111f38d5f
ORCID for Lingcong Meng: ORCID iD orcid.org/0000-0002-3995-3584

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Date deposited: 13 Jun 2017 16:34
Last modified: 15 Mar 2024 13:13

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Contributors

Author: Maxim B. Joseph
Author: Eleni Bitziou
Author: Tania L. Read
Author: Lingcong Meng ORCID iD
Author: Nicola L. Palmer
Author: Tim P. Mollart
Author: Mark E. Newton
Author: Julie V. Macpherson

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