White light emitting organic nanoparticles can be made simply by encapsulating an orange-red emitting dye within a scaffold of blue light emitting nanoparticles, say scientists in Japan. The material could be suitable for applications in optoelectronics and bio-imaging, they claim.
Masayuki Takeuchi and colleagues at the National Institute for Materials Science, Tsukuba, made an oligofluorene derivative that self-assembled in solution to form stable colloidal nanoparticles. They tuned the nanoparticles’ bright blue fluorescence to white through fluorescence resonance energy transfer by encapsulating DCM, an orange-red emitting dye, within the nanoparticle assembly.
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