Photoelectric Properties of a Light-Addressable Electrode with a Low-Conductive Passivation Layer and Spatial Resolution of the Light-Addressed Electrical Stimulation

• Suzurikawa Jun

  Graduate School of Information Science and Technology, The University of Tokyo

• Takahashi Hirokazu

  Graduate School of Information Science and Technology, The University of Tokyo

• Kanzaki Ryohei

  Graduate School of Information Science and Technology, The University of Tokyo

• Nakao Masayuki

  Graduate School of Engineering, The University of Tokyo

• Jimbo Yasuhiko

  Graduate School of Frontier Sciences, The University of Tokyo

Bibliographic Information

Other Title

• 低導電性保護膜を有する光アドレス電極の光電気特性と同電極を用いた電気刺激の空間分解能
• テイドウデンセイ ホゴマク オ ユウスル ヒカリ アドレス デンキョク ノ ヒカリ デンキ トクセイ ト ドウ デンキョク オ モチイタ デンキ シゲキ ノ クウカン ブンカイノウ

Abstract

Conventional microelectrode arrays (MEAs) cannot always access desired neurons due to low electrode density and small electrode number. To overcome this problem, we have proposed and developed a light-addressable planar electrode on a glass substrate. The electrode has a 3-layer structure, namely a transparent SnO₂ layer, an hydrogenated amorphous silicon (a-Si:H) layer, and a low-conductive passivation layer. Illumination to the a-Si:H layer increases the conductivity of a-Si:H and generates a virtual electrode at the surface of the illuminated site. In the present study, we evaluated the photoelectric property of the developed electrode and estimated the spatial resolution of the light-addressed stimulation. Illumination to the electrode increased stimulus intensity by up to 60-folds. This illumination-induced intensity change sufficiently followed high-frequency illumination switching. The simultaneous fluo-4 Ca²⁺-imaging, thus, successfully monitored post-stimulus fluorescence transients by instantaneously shutting out the excitation light during stimulus pulse application. By monitoring stimulus induced responses of cell aggregations, we estimated the spatial resolution of the light-addressed stimulation at 10 μm or more with an addressing illumination spot of 70 μm in diameter.

Journal

• IEEJ Transactions on Electronics, Information and Systems

  IEEJ Transactions on Electronics, Information and Systems 127 (10), 1581-1587, 2007

  The Institute of Electrical Engineers of Japan

Keywords

• Light addressing
• Electrical stimulation
• Cultured neurons
• amorphous silicon
• Ca²⁺ imaging

Details

• CRID: 1390001204606644992
• NII Article ID: 10019958334
• NII Book ID: AN10065950
• DOI: 10.1541/ieejeiss.127.1581
• ISSN: 13488155
• ISSN: 03854221
• NDL BIB ID: 8960412
• Web Site: http://id.ndl.go.jp/bib/8960412
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8960412
• Web Site: http://www.jstage.jst.go.jp/article/ieejeiss/127/10/127_10_1581/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed