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Molecular imprinting sensor based on quantum weak measurement.

Dongmei Li1, Qinghua He1, Yonghong He1

  • 1Department of Physics, Tsinghua University, Beijing 100084, China; Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical imaging and Sensing, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.

Biosensors & Bioelectronics
|March 21, 2017
PubMed
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A novel sensing method using quantum weak measurement enhances molecularly imprinted polymer (MIP) sensors for precise protein detection. This new technique, the weak measurement-based MIP (WMMIP) sensor, demonstrates high sensitivity and selectivity for detecting bovine serum albumin (BSA).

Area of Science:

  • Quantum Metrology
  • Biosensing
  • Polymer Science

Background:

  • Molecularly imprinted polymers (MIPs) are crucial for selective analyte recognition.
  • Traditional MIP sensors face challenges in sensitivity and real-time detection.
  • Quantum weak measurement offers high precision for detecting subtle physical changes.

Purpose of the Study:

  • To propose and demonstrate a novel sensing protocol for MIP sensors using quantum weak measurement.
  • To experimentally validate the feasibility, sensitivity, and selectivity of the weak measurement-based MIP (WMMIP) sensor.
  • To achieve real-time, highly sensitive detection of specific protein molecules.

Main Methods:

  • Development of a Mach-Zehnder interferometer-based optical weak measurement system.
Keywords:
Molecular imprinting techniqueQuantum weak measurementSensors

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  • Preparation of bovine serum albumin imprinted MIPs (BSA@MIP) using a modified reversed-phase microemulsion method.
  • Coating BSA@MIP onto the internal surface of measuring channels for real-time analyte detection.

    • Main Results:

    • Demonstrated high sensitivity to optical phase shifts induced by protein adsorption.
    • Achieved real-time dynamic monitoring of BSA adsorption and concentration response.
    • Established a limit of detection (LOD) as low as 8.01×10⁻¹² g/L for BSA.
    • Exhibited superior accuracy, fast response, and low cost compared to conventional methods.

    Conclusions:

    • The WMMIP sensor successfully integrates quantum weak measurement with MIP technology for enhanced molecular analysis.
    • This approach offers a promising platform for highly sensitive and selective real-time biosensing.
    • The developed system significantly advances the performance and applicability of MIPs in molecular detection.