Detail publikace

Large Scale Fabrication of Ordered Gold Nanoparticle-Epoxy Surface Nanocomposites and Their Application as Label-Free Plasmonic DNA Biosensors

LEDNICKÝ, T. BONYÁR, A.

Originální název

Large Scale Fabrication of Ordered Gold Nanoparticle-Epoxy Surface Nanocomposites and Their Application as Label-Free Plasmonic DNA Biosensors

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

A robust and scalable technology to fabricate ordered gold nanoparticle arrangements on epoxy substrates is presented. The nanoparticles are synthesized by solid-state dewetting on nanobowled aluminum templates, which are prepared by the selective chemical etching of porous anodic alumina (PAA) grown on an aluminum sheet with controlled anodic oxidation. This flexible fabrication technology provides proper control over the nanoparticle size, shape, and interparticle distance over a large surface area (several cm(2)), which enables the fine-tuning and optimization of their plasmonic absorption spectra for LSPR and SERS applications between 535 and 625 nm. The nanoparticles are transferred to the surface of epoxy substrates, which are subsequently selectively etched. The resulting nanomushrooms arrangements consist of ordered epoxy nanopillars with flat, disk-shaped nanoparticles on top, and their bulk refractive index sensitivity is between 83 and 108 nm RIU-1. Label-free DNA detection is successfully demonstrated with the sensors by using a 20 base pair long specific DNA sequence from the parasite Giardia lamblia. A red-shift of 6.6 nm in the LSPR absorbance spectrum was detected after the 2 h hybridization with 1 pM target DNA, and the achievable LOD was around 5 nM. The reported plasmonic sensor is one of the first surface AuNP/polymer nanocomposites ever reported for the successful label-free detection of DNA.

Klíčová slova

localized surface plasmon resonance; nanoparticle lattice; DNA biosensor; surface nanocomposite; nanobowled aluminum

Autoři

LEDNICKÝ, T.; BONYÁR, A.

Vydáno

29. 1. 2020

Nakladatel

AMER CHEMICAL SOC

Místo

WASHINGTON

ISSN

1944-8244

Periodikum

ACS APPL MATER INTER

Ročník

12

Číslo

4

Stát

Spojené státy americké

Strany od

4804

Strany do

4814

Strany počet

11

URL

https://pubs.acs.org/doi/10.1021/acsami.9b20907

Plný text v Digitální knihovně

http://hdl.handle.net/11012/193507

BibTex

@article{BUT162168,
  author="Tomáš {Lednický} and Attila {Bonyár}",
  title="Large Scale Fabrication of Ordered Gold Nanoparticle-Epoxy Surface Nanocomposites and Their Application as Label-Free Plasmonic DNA Biosensors",
  journal="ACS APPL MATER INTER",
  year="2020",
  volume="12",
  number="4",
  pages="4804--4814",
  doi="10.1021/acsami.9b20907",
  issn="1944-8244",
  url="https://pubs.acs.org/doi/10.1021/acsami.9b20907"
}