On-chip capacitively coupled contactless conductivity detection using "injected" metal electrodes

Leigh Thredgold; Dmitriy Khodakov; Amanda Ellis; Claire Lenehan

doi:10.1039/c3an00870c

On-chip capacitively coupled contactless conductivity detection using "injected" metal electrodes

Leigh Thredgold, Dmitriy Khodakov, Amanda Ellis, Claire Lenehan

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

We demonstrate the use of injected gallium electrodes for capacitively coupled contactless conductivity detection (C⁴D) within a microchip electrophoresis device. Evaluation of the electrodes for quantitative detection of electrophoretically separated lithium, sodium and potassium ions showed the system offers competitive detection limits of 6.1 × 10^-6 M, 6.7 × 10^-6 M and 8.5 × 10^-6 M, respectively. The fabrication process is fast, highly reproducible, and eliminates difficulties with electrode alignment. Using this approach C⁴D can be readily achieved in any microchip by simply adding extra 'electrode' channels to the microchip design.

Original language	English
Pages (from-to)	4275-4279
Number of pages	5
Journal	Analyst
Volume	138
Issue number	15
DOIs	https://doi.org/10.1039/c3an00870c
Publication status	Published - 7 Aug 2013

Access to Document

10.1039/c3an00870c

Cite this

@article{3ddd62d2adb44f9a804e1e827db55627,

title = "On-chip capacitively coupled contactless conductivity detection using {"}injected{"} metal electrodes",

abstract = "We demonstrate the use of injected gallium electrodes for capacitively coupled contactless conductivity detection (C4D) within a microchip electrophoresis device. Evaluation of the electrodes for quantitative detection of electrophoretically separated lithium, sodium and potassium ions showed the system offers competitive detection limits of 6.1 × 10-6 M, 6.7 × 10-6 M and 8.5 × 10-6 M, respectively. The fabrication process is fast, highly reproducible, and eliminates difficulties with electrode alignment. Using this approach C4D can be readily achieved in any microchip by simply adding extra 'electrode' channels to the microchip design.",

author = "Leigh Thredgold and Dmitriy Khodakov and Amanda Ellis and Claire Lenehan",

year = "2013",

month = aug,

day = "7",

doi = "10.1039/c3an00870c",

language = "English",

volume = "138",

pages = "4275--4279",

journal = "Analyst",

issn = "0003-2654",

publisher = "Royal Society of Chemistry",

number = "15",

}

TY - JOUR

T1 - On-chip capacitively coupled contactless conductivity detection using "injected" metal electrodes

AU - Thredgold, Leigh

AU - Khodakov, Dmitriy

AU - Ellis, Amanda

AU - Lenehan, Claire

PY - 2013/8/7

Y1 - 2013/8/7

N2 - We demonstrate the use of injected gallium electrodes for capacitively coupled contactless conductivity detection (C4D) within a microchip electrophoresis device. Evaluation of the electrodes for quantitative detection of electrophoretically separated lithium, sodium and potassium ions showed the system offers competitive detection limits of 6.1 × 10-6 M, 6.7 × 10-6 M and 8.5 × 10-6 M, respectively. The fabrication process is fast, highly reproducible, and eliminates difficulties with electrode alignment. Using this approach C4D can be readily achieved in any microchip by simply adding extra 'electrode' channels to the microchip design.

AB - We demonstrate the use of injected gallium electrodes for capacitively coupled contactless conductivity detection (C4D) within a microchip electrophoresis device. Evaluation of the electrodes for quantitative detection of electrophoretically separated lithium, sodium and potassium ions showed the system offers competitive detection limits of 6.1 × 10-6 M, 6.7 × 10-6 M and 8.5 × 10-6 M, respectively. The fabrication process is fast, highly reproducible, and eliminates difficulties with electrode alignment. Using this approach C4D can be readily achieved in any microchip by simply adding extra 'electrode' channels to the microchip design.

UR - http://www.scopus.com/inward/record.url?scp=84879745486&partnerID=8YFLogxK

U2 - 10.1039/c3an00870c

DO - 10.1039/c3an00870c

M3 - Article

SN - 0003-2654

VL - 138

SP - 4275

EP - 4279

JO - Analyst

JF - Analyst

IS - 15

ER -

On-chip capacitively coupled contactless conductivity detection using "injected" metal electrodes

Abstract

Access to Document

Other files and links

Fingerprint

Cite this