Alternative sensor materials for light-addressable potentiometric sensors

T. Yoshinobu; H. Ecken; A. Poghossian; H. Lüth; H. Iwasaki; M. J. Schöning

doi:10.1016/S0925-4005(01)00646-3

Alternative sensor materials for light-addressable potentiometric sensors

T. Yoshinobu, H. Ecken, A. Poghossian, H. Lüth, H. Iwasaki, M. J. Schöning

Research output: Contribution to journal › Conference article › peer-review

30 Citations (Scopus)

Abstract

Ta₂O₅ and porous Si were investigated as alternative sensor materials for the light-addressable potentiometric sensor (LAPS). The Ta₂O₅ LAPS, prepared by the pulsed laser deposition (PLD) technique, showed a high pH sensitivity of 57.5 mV/pH and a good linearity. Porous Si was prepared by anodic etching of Si in a mixture of HF and ethanol. The porous Si LAPS with a Si₃N₄ layer showed a pH sensitivity of 57.3 mV/pH. As an application of the porous Si LAPS, a penicillin LAPS was fabricated by immobilization of penicillinase on the surface. The pH change due to the enzymatic reaction was detected for the penicillin concentration between 250 μM and 10 mM.

Original language	English
Pages (from-to)	388-392
Number of pages	5
Journal	Sensors and Actuators, B: Chemical
Volume	76
Issue number	1-3
DOIs	https://doi.org/10.1016/S0925-4005(01)00646-3
Publication status	Published - 2001 Jun 1
Externally published	Yes
Event	Proceeding of the 8th International Meeting on Chemical Sensors - Basel, Switzerland Duration: 2000 Jul 2 → 2000 Jul 5

Keywords

Chemical sensor
Light-addressable potentiometric sensor (LAPS)
Penicillinase
Porous silicon
Pulsed laser deposition
Sensor
TaO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/S0925-4005(01)00646-3

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title = "Alternative sensor materials for light-addressable potentiometric sensors",

abstract = "Ta2O5 and porous Si were investigated as alternative sensor materials for the light-addressable potentiometric sensor (LAPS). The Ta2O5 LAPS, prepared by the pulsed laser deposition (PLD) technique, showed a high pH sensitivity of 57.5 mV/pH and a good linearity. Porous Si was prepared by anodic etching of Si in a mixture of HF and ethanol. The porous Si LAPS with a Si3N4 layer showed a pH sensitivity of 57.3 mV/pH. As an application of the porous Si LAPS, a penicillin LAPS was fabricated by immobilization of penicillinase on the surface. The pH change due to the enzymatic reaction was detected for the penicillin concentration between 250 μM and 10 mM.",

keywords = "Chemical sensor, Light-addressable potentiometric sensor (LAPS), Penicillinase, Porous silicon, Pulsed laser deposition, Sensor, TaO",

author = "T. Yoshinobu and H. Ecken and A. Poghossian and H. L{\"u}th and H. Iwasaki and Sch{\"o}ning, {M. J.}",

note = "Funding Information: The authors gratefully acknowledge J. Schubert and A. Simonis for the preparation of Ta 2 O 5 sensors. They also thank R. Arens-Fischer for his helpful advice on the preparation of the porous Si. One of the authors (T. Yoshinobu) was financially supported by the Ministry for Education, Science, Sports and Culture of Japan during his stay at the Research Centre J{\"u}lich.; Proceeding of the 8th International Meeting on Chemical Sensors ; Conference date: 02-07-2000 Through 05-07-2000",

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doi = "10.1016/S0925-4005(01)00646-3",

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T1 - Alternative sensor materials for light-addressable potentiometric sensors

AU - Yoshinobu, T.

AU - Ecken, H.

AU - Poghossian, A.

AU - Lüth, H.

AU - Iwasaki, H.

AU - Schöning, M. J.

N1 - Funding Information: The authors gratefully acknowledge J. Schubert and A. Simonis for the preparation of Ta 2 O 5 sensors. They also thank R. Arens-Fischer for his helpful advice on the preparation of the porous Si. One of the authors (T. Yoshinobu) was financially supported by the Ministry for Education, Science, Sports and Culture of Japan during his stay at the Research Centre Jülich.

PY - 2001/6/1

Y1 - 2001/6/1

N2 - Ta2O5 and porous Si were investigated as alternative sensor materials for the light-addressable potentiometric sensor (LAPS). The Ta2O5 LAPS, prepared by the pulsed laser deposition (PLD) technique, showed a high pH sensitivity of 57.5 mV/pH and a good linearity. Porous Si was prepared by anodic etching of Si in a mixture of HF and ethanol. The porous Si LAPS with a Si3N4 layer showed a pH sensitivity of 57.3 mV/pH. As an application of the porous Si LAPS, a penicillin LAPS was fabricated by immobilization of penicillinase on the surface. The pH change due to the enzymatic reaction was detected for the penicillin concentration between 250 μM and 10 mM.

AB - Ta2O5 and porous Si were investigated as alternative sensor materials for the light-addressable potentiometric sensor (LAPS). The Ta2O5 LAPS, prepared by the pulsed laser deposition (PLD) technique, showed a high pH sensitivity of 57.5 mV/pH and a good linearity. Porous Si was prepared by anodic etching of Si in a mixture of HF and ethanol. The porous Si LAPS with a Si3N4 layer showed a pH sensitivity of 57.3 mV/pH. As an application of the porous Si LAPS, a penicillin LAPS was fabricated by immobilization of penicillinase on the surface. The pH change due to the enzymatic reaction was detected for the penicillin concentration between 250 μM and 10 mM.

KW - Chemical sensor

KW - Light-addressable potentiometric sensor (LAPS)

KW - Penicillinase

KW - Porous silicon

KW - Pulsed laser deposition

KW - Sensor

KW - TaO

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JO - Sensors and Actuators, B: Chemical

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T2 - Proceeding of the 8th International Meeting on Chemical Sensors

Y2 - 2 July 2000 through 5 July 2000

ER -

Alternative sensor materials for light-addressable potentiometric sensors

Abstract

Keywords

ASJC Scopus subject areas

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