Detail publikace

Surface Passivation Improves the Synthesis of Highly Stable and Specific DNA-Functionalized Gold Nanoparticles with Variable DNA Density

DEKA, J. MĚCH, R. IANESELLI, L. AMENITSCH, H. CACHO-NERIN, F. PARISSE, P. CASALIS, L.

Anglický název

Surface Passivation Improves the Synthesis of Highly Stable and Specific DNA-Functionalized Gold Nanoparticles with Variable DNA Density

Typ

Článek WoS

Jazyk

en

Originální abstrakt

We report a novel and multifaceted approach for the quick synthesis of highly stable single-stranded DNA (ssDNA) functionalized gold nanoparticles (AuNPs). The method is based on the combined effect of surface passivation by (1-mercaptoundec-11-yl)hexa(ethylene glycol) and low pH conditions, does not require any salt pretreatment or high excess of ssDNA, and can be generalized for oligonucleotides of any length or base sequence. The synthesized ssDNA-coated AuNPs conjugates are stable at salt concentrations as high as 3.0 M, and also functional and specific toward DNA–DNA hybridization, as shown from UV–vis spectrophotometry, scanning electron microscopy, gel electrophoresis, fluorescence, and small angle X-ray scattering based analyses. The method is highly flexible and shows an additional advantage of creating ssDNA-AuNP conjugates with a predefined number of ssDNA strands per particle. Its simplicity and tenability make it widely applicable to diverse biosensing applications involving ssDNA functionalized AuNPs.

Klíčová slova anglicky

DNA functionalization; gold nanoparticles; surface passivation; oligo ethylene glycol; salt-stability; specificity; variable DNA density

Vydáno

2015-03-10

ISSN

1944-8252

Časopis

ACS Applied Materials & Interfaces

Ročník

7

Číslo

12

Strany od–do

7033–7040

Počet stran

8

BIBTEX


@article{BUT114481,
  author="Jashmini {Deka} and Rostislav {Váňa} and Luca {Ianeselli} and Heinz {Amenitsch} and Fernando {Cacho-Nerin} and Pietro {Parisse} and Loredana {Casalis}",
  title="Surface Passivation Improves the Synthesis of Highly Stable and Specific DNA-Functionalized Gold Nanoparticles with Variable DNA Density",
  journal="ACS Applied Materials & Interfaces",
  year="2015",
  volume="7",
  number="12",
  pages="7033--7040",
  doi="10.1021/acsami.5b01191",
  issn="1944-8244"
}