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Related Experiment Video

Updated: Jun 22, 2026

Preparation of Silicon Nanowire Field-effect Transistor for Chemical and Biosensing Applications
11:25

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Published on: April 21, 2016

Direct protein detection with a nano-interdigitated array gate MOSFET.

Xiaohui Tang1, Alain M Jonas, Bernard Nysten

  • 1Microelectronics Laboratory (DICE) and CERMIN, Université catholique de Louvain (UCL), Place du Levant 3, 1348 Louvain-la-Neuve, Belgium. Xiaohui.tang@uclouvain.be

Biosensors & Bioelectronics
|June 9, 2009
PubMed
Summary
This summary is machine-generated.

A novel protein sensor using a nano-interdigitated array (nIDA) gate on a metal oxide semiconductor field effect transistor (MOSFET) achieves highly sensitive and selective detection of the anti-Iris protein.

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Area of Science:

  • Nanotechnology
  • Biosensors
  • Field-Effect Transistors

Background:

  • Protein detection is crucial for diagnostics.
  • Existing biosensors face challenges in sensitivity and selectivity.
  • Metal oxide semiconductor field effect transistors (MOSFETs) offer potential for sensitive detection.

Purpose of the Study:

  • To develop a novel nanobiosensor for protein detection.
  • To enhance the sensitivity and selectivity of MOSFET-based sensors.
  • To demonstrate real-time, label-free detection of specific proteins.

Main Methods:

  • Replacing the gate of a MOSFET with a nano-interdigitated array (nIDA).
  • Utilizing the nIDA-gate MOSFET for detecting antibody-protein binding.
  • Developing a simple model to explain sensor behavior and sensitivity.
  • Optimizing geometrical parameters of the nIDA-gate MOSFET.

Main Results:

  • The nIDA-gate MOSFET sensor detected anti-Iris protein at concentrations below 1 ng/ml.
  • The sensor demonstrated high selectivity and reproducible specific detection.
  • Drain current increased with successive binding of thiol, Iris, and anti-Iris protein layers.
  • Detection limit was improved by optimizing nIDA geometrical parameters.

Conclusions:

  • The developed nanobiosensor offers a sensitive and selective platform for protein detection.
  • The sensor's design is compatible with complementary metal oxide semiconductor (CMOS) technology for potential integration.
  • This technology can be extended for detecting various biomarkers including DNA, viruses, and cancer markers.