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Rajib Nandi1, Santanu Kumar Pal

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This study introduces a portable, smartphone-based liquid crystal (LC) optical sensor for detecting biological samples. The novel device offers accurate, cost-effective, and label-free detection, moving LC sensors from labs to real-world applications.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Optical Sensing

Background:

  • Liquid crystal (LC) optical sensors offer promising label-free detection of biological samples.
  • Current LC sensors are limited to laboratory settings using conventional polarizing optical microscopy (POM).
  • A need exists for portable, cost-effective LC sensing devices for commercial applications.

Purpose of the Study:

  • To design and fabricate a portable, lightweight, and inexpensive sensing device for LC-based optical sensors.
  • To utilize a smartphone for detecting optical signals from LC sensors.
  • To enable practical, real-world applications of LC sensing technology.

Main Methods:

  • 3D printing was employed to fabricate a portable sensing device.
  • A smartphone was integrated into the device for optical signal detection.
  • The accuracy of the smartphone-based detection was compared to conventional POM.

Main Results:

  • A functional 3D printed portable sensing device was successfully designed and fabricated.
  • The smartphone-based optical signal detection demonstrated accuracy comparable to conventional POM.
  • The device facilitates the transition of LC sensors from laboratory research to practical use.

Conclusions:

  • The developed 3D printed, smartphone-integrated device provides a novel platform for LC-based optical sensors.
  • This innovation makes LC sensors more accessible for industrial and daily life applications.
  • The portable sensor offers a cost-effective and efficient alternative for biological sample detection.