Robust Ionic Current Sensor for Bacterial Cell Size Detection

Hirotoshi Yasaki, Taisuke Shimada, Takao Yasui, Takeshi Yanagida, Noritada Kaji, Masaki Kanai, Kazuki Nagashima, Tomoji Kawai, Yoshinobu Baba

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Ionic current sensing methods are useful tools for detecting sub- to several-micron scale particles such as bacteria. However, conventional commercially available ionic current sensing devices are not suitable for on-site measurement use because of inherent limitations on their robustness. Here, we proposed a portable robust ionic current sensor (Robust-ICS) using a bridge circuit that offers a high signal-to-noise (S/N) ratio by suppressing background current. Because the Robust-ICS can tolerate increased noise in current sensing, a simple, lightweight electromagnetic shield can be used and measurements under large electromagnetic noise conditions can be made. The weight of the device was lowered below 4 kg and outdoor particle detection measurements were completed successfully. Accuracy of size detection of Staphylococcus aureus (S. aureus) was equivalent to that obtained by SEM imaging.

Original languageEnglish
Pages (from-to)574-579
Number of pages6
JournalACS Sensors
Volume3
Issue number3
DOIs
Publication statusPublished - Mar 23 2018

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sensors
Sensors
cells
Bridge circuits
Signal to noise ratio
Bacteria
Imaging techniques
electromagnetic noise
Scanning electron microscopy
staphylococcus
bacteria
signal to noise ratios
electromagnetism
scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Instrumentation
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes

Cite this

Robust Ionic Current Sensor for Bacterial Cell Size Detection. / Yasaki, Hirotoshi; Shimada, Taisuke; Yasui, Takao; Yanagida, Takeshi; Kaji, Noritada; Kanai, Masaki; Nagashima, Kazuki; Kawai, Tomoji; Baba, Yoshinobu.

In: ACS Sensors, Vol. 3, No. 3, 23.03.2018, p. 574-579.

Research output: Contribution to journalArticle

Yasaki, H, Shimada, T, Yasui, T, Yanagida, T, Kaji, N, Kanai, M, Nagashima, K, Kawai, T & Baba, Y 2018, 'Robust Ionic Current Sensor for Bacterial Cell Size Detection', ACS Sensors, vol. 3, no. 3, pp. 574-579. https://doi.org/10.1021/acssensors.8b00045
Yasaki, Hirotoshi ; Shimada, Taisuke ; Yasui, Takao ; Yanagida, Takeshi ; Kaji, Noritada ; Kanai, Masaki ; Nagashima, Kazuki ; Kawai, Tomoji ; Baba, Yoshinobu. / Robust Ionic Current Sensor for Bacterial Cell Size Detection. In: ACS Sensors. 2018 ; Vol. 3, No. 3. pp. 574-579.
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