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Dual-Color Plasmonic Nanosensor for Radiation Dosimetry.

Yu Tao1,2, Mingqiang Li3,2, Xiangyu Liu1

  • 1Institute for Cancer Genetics, Columbia University, New York, New York 10032, United States.

ACS Applied Materials & Interfaces
|April 28, 2020
PubMed
Summary
This summary is machine-generated.

A new colorimetric assay uses gold nanorods and silver nanoprisms to detect ionizing radiation. This simple, inexpensive dosimeter accurately measures radiation doses for radiotherapy and environmental monitoring.

Keywords:
colorimetric detectiondual-color nanosensorgold nanorodsradiation dosimetrysilver nanoprisms

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Area of Science:

  • Nanotechnology and Materials Science
  • Radiation Detection and Dosimetry
  • Biomedical Engineering

Background:

  • Accurate radiation dosimetry is essential for effective cancer therapy and environmental safety.
  • Existing dosimeters can be complex, costly, or lack user-friendliness.
  • There is a need for simple, inexpensive, and reliable radiation detection methods.

Purpose of the Study:

  • To develop an innovative, user-friendly, and cost-effective colorimetric nanosensor assay for ionizing radiation detection.
  • To establish a radiation sensing platform based on the etching of gold nanorods (AuNRs) and silver nanoprisms (AgNPRs) by hydroxyl radicals.

Main Methods:

  • Designed a colorimetric assay utilizing AuNRs and AgNPRs as sensing elements.
  • Investigated the etching of AuNRs and AgNPRs induced by hydroxyl radicals generated from ionizing radiation.
  • Correlated color changes with specific radiation doses and evaluated the assay's performance in detecting radiation-induced DNA damage response in mammalian cells.

Main Results:

  • Demonstrated reproducible color changes in AuNRs and AgNPRs upon exposure to ionizing radiation.
  • Established a detection range of 50-2000 rad, suitable for various radiotherapy fractionation schemes.
  • Showed correlation between detected radiation doses and DNA damage response in cells, validating the assay's biological relevance.

Conclusions:

  • The developed AuNR- and AgNPR-based colorimetric assay provides a simple, user-friendly, and inexpensive method for ionizing radiation detection.
  • The paper-based format facilitates wide adoption and translation for diverse applications, including radiotherapy and environmental monitoring.
  • This nanosensor platform offers a promising alternative for accurate and accessible radiation dosimetry.