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Laser nanostructured gold biosensor for proto-oncogene detection.

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Researchers developed a novel gold biosensor using green laser techniques. This sensitive and reproducible biosensor can detect cancer-related DNA fragments, offering a scalable platform for oncological diagnostics.

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Area of Science:

  • Nanotechnology
  • Biomedical Engineering
  • Molecular Diagnostics

Background:

  • Biosensor research is crucial for medical science advancement.
  • Traditional nanofabrication methods are being complemented by laser-based techniques.
  • Developing sensitive and reproducible biosensors is essential for early disease detection.

Purpose of the Study:

  • To develop a novel gold-based biosensor using eco-friendly laser ablation techniques.
  • To assess the biosensor's limit of detection (LoD) and sensitivity for specific DNA fragments.
  • To demonstrate the potential of this biosensor for detecting cancer biomarkers.

Main Methods:

  • Utilized Laser Ablation Synthesis in Liquid (LASiS) and Confined Atmospheric Pulsed-laser (CAP) deposition for biosensor fabrication.
  • Fabricated 200 gold-based biosensors to ensure reproducibility.
  • Tested the biosensor's ability to detect a DNA fragment of the c-Myc gene.

Main Results:

  • Achieved a limit of detection (LoD) of 3.18 µM for the DNA fragment.
  • Demonstrated the biosensor's capability to detect the target DNA sequence.
  • Confirmed high reproducibility across 200 fabricated sensors.

Conclusions:

  • The developed biosensor offers a scalable, green, and reliable platform for biosensing.
  • This novel biosensor shows potential for detecting clinically relevant oncogenic targets, such as ctDNA in cancer.
  • Laser-based nanofabrication presents a viable alternative for advanced biosensor development.