Regiospecific hetero-assembly of DNA-functionalized plasmonic upconversion superstructures

Le Le Li, Yi Lu

Research output: Contribution to journalArticlepeer-review

Abstract

We report a novel strategy for regiospecific hetero-assembly of DNA-modified gold nanoparticles (DNA-AuNPs) onto upconversion nanoparticles (UCNPs) into hybrid lab-on-a-particle systems. The DNA-AuNPs have been assembled onto the hexagonal plate-like UCNPs with well-regulated stoichiometry and controlled organization onto the different facets of UCNP, forming various addressable superstructures. The fine-tuning of stoichiometry and organization is realized by biorecognition specificity of DNA toward specific crystal facets of UCNPs. Such a hetero-assembled DNA-AuNP/UCNP system maintains both plasmonic resonance of AuNPs and fluorescent properties of UCNPs, allowing targeted dual-modality imaging of cancer cells using an aptamer.

Original languageEnglish (US)
Pages (from-to)5272-5275
Number of pages4
JournalJournal of the American Chemical Society
Volume137
Issue number16
DOIs
StatePublished - Apr 29 2015

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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