Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2009 May 7;1(5-6):345–362. doi: 10.1039/b905502a

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

This journal is © The Royal Society of Chemistry 2009

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

PMC Copyright notice

Fig4 — (A) Fluorescence false-colour images of two types of rare-earth doped glass encoded microparticles. (B) Emission spectra of each type of element used to make up the various barcodes (adapted with permission from ref. 34, copyright © 2003, The National Academy of Sciences).