One of the key roadblocks in UCNP development is its extremely limited choices of excitation wavelengths. We report a generic design to program UCNPs to possess highly tunable dye characteristic excitation bands. Using such distinctive properties, we were able to develop a new excitation wavelength selective security imaging. This work unleashed the greater freedom of the excitation wavelengths of the upconversion nanoparticles and we believe it is a game-changer in the field and this method will enable numerous applications that are currently limited by existing UCNPs.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4636449 | PMC |
| http://dx.doi.org/10.1039/c5nr05437k | DOI Listing |
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