Time-Resolved Luminescence Measurements on Up-Conversion Phosphors for Electron Beam Sterilization Monitoring

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We present recent investigations on time-resolved measurements on alterations in the temporal luminescence decay of up-conversion phosphors induced by electron beam treatment. As a consequence of the tight regulations concerning sterility in the food and medical sectors a reliable and nondestructive in situ evaluation of the sterilization process faces a huge demand. Our technique is based on placing a suitable marker material (based on rare-earth phosphors) inside or as a coating on the packaging material. Upon electron irradiation the marker material changes its luminescent properties as a function of applied energy dose. The energy dependence is verified by time-resolved measurements on different up-conversion materials.

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Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2013: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational (Volume 2)
Published: May 12, 2013
Pages: 119 - 122
Industry sector: Sensors, MEMS, Electronics
Topics: MEMS & NEMS Devices, Modeling & Applications
ISBN: 978-1-4822-0584-8