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Sequence-Dependent DNA Functionalization of Upconversion Nanoparticles and Their Programmable Assemblies.

Huan Ge1,2, Dongya Wang3, Yue Pan2

  • 1School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.

Angewandte Chemie (International Ed. in English)
|February 26, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed DNA-modified upconversion nanoparticles (DNA-UCNPs) with improved stability and precise DNA orientation. This breakthrough enables programmable assembly of complex nanostructures for advanced applications.

Keywords:
DNAnanostructurespoly-cytosineself-assemblyupconversion nanoparticles

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Area of Science:

  • Nanotechnology
  • Bioconjugation Chemistry
  • Materials Science

Background:

  • Lanthanide-doped upconversion nanoparticles (UCNPs) offer unique optical properties.
  • DNA-UCNPs combine UCNP optics with DNA functionality for diverse applications.
  • Challenges exist in controlling DNA attachment and orientation on UCNP surfaces.

Purpose of the Study:

  • To investigate the sequence-dependent interactions between DNA and UCNPs.
  • To develop a general method for synthesizing stable, monodispersed DNA-UCNP conjugates.
  • To enable programmable self-assembly of complex nanostructures using DNA-UCNPs.

Main Methods:

  • Systematic investigation of DNA sequence effects on UCNP binding.
  • Synthesis of DNA-UCNP conjugates using poly-cytosine (poly-C) containing diblock DNA strands.
  • Characterization of DNA-UCNP conjugate stability, monodispersity, and assembly capabilities.

Main Results:

  • Poly-cytosine (poly-C) DNA sequences exhibit high affinity for UCNP surfaces.
  • A novel method yields highly stable and monodispersed DNA-UCNPs with perpendicular DNA orientation.
  • Demonstrated programmable assembly of complex structures via DNA hybridization.

Conclusions:

  • Poly-C mediated DNA binding provides a robust strategy for DNA-UCNP functionalization.
  • The developed DNA-UCNPs are suitable for creating well-organized, complex nanostructures.
  • This work advances the precise engineering of functional nanomaterials for advanced applications.