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Article Dans Une Revue Sensors and Actuators B: Chemical Année : 2018

An interdigitated ISFET-type sensor based on LPCVD grown graphene for ultrasensitive detection of carbaryl

Thi Thanh Cao
  • Fonction : Auteur
Hai Binh Nguyen
  • Fonction : Auteur
van Tu Nguyen
  • Fonction : Auteur
Thi Thu Vu
  • Fonction : Auteur
Maxime Bayle
Matthieu Paillet
  • Fonction : Auteur
  • PersonId : 1000232
Bach Thang Phan
  • Fonction : Auteur
Dai Lam Tran
  • Fonction : Auteur
Ngoc Minh Phan
  • Fonction : Auteur
van Chuc Nguyen
  • Fonction : Auteur

Résumé

Consider advances are being made to develop new technologies capable of fast in-situ tracing of agricultural toxins. In this work, we reported a simple carbaryl sensor with very high sensitivity using graphene interdigitated ion selective field effect transistor (ISFET). The graphene films were first prepared on polycrystalline copper foil by a low-pressure chemical vapor deposition method, and then transferred onto the interdigitated electrodes of ISFETs by a chemical etching technique. The biorecognition is based on the enzymatic inhibition of carbaryl towards urease. As expected, the weaker enzymatic activity of urease in addition of carbaryl would result in the weaker current response. It was demonstrated that the interdigitated ISFET sensor could achieve high sensitivity to detect carbaryl as low as 10−8 μg mL−1 and the current response of the device showed a good linearity against the logarithm of carbaryl concentration Ccarbaryl with a regression equation ΔIds = −0.4 − 0.6 logCcarbaryl (mA) (R2 = 0.99) in the concentration range from 2.58 × 10−7 to 2.58 × 10−2 μg mL−1. In conlusion, such convenient graphene-based ISFET configuration could be advantageously extended for on-line screening of other pesticide and herbicide agents
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Dates et versions

hal-01934914 , version 1 (26-11-2018)

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Citer

Thi Thanh Cao, Hai Binh Nguyen, van Tu Nguyen, Thi Thu Vu, Maxime Bayle, et al.. An interdigitated ISFET-type sensor based on LPCVD grown graphene for ultrasensitive detection of carbaryl. Sensors and Actuators B: Chemical, 2018, 260, pp.78-85. ⟨10.1016/j.snb.2017.12.191⟩. ⟨hal-01934914⟩
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