SCIENCE@home

Nanopits based novel hybrid plasmonic nanosensor fabricated by a facile nanofabrication technique for biosensing

R. M. Piragash Kumar,A. Venkatesh,V. Moorthy

Published 2019 in Materials Research Express

ABSTRACT

Hybrid plasmonic nanosensors that harness the benefits of both localized and propagating surface plasmons are progressing toward practical real-life applications in point-of-care diagnosis. Here, we demonstrate a novel hybrid plasmonic nanosensor composed of random nanopits in Ag thin film prepared using a simple, single-step, and cost-effective nanofabrication technique. The nanopits are asymmetric in shape with trench-shaped sharp bottom and possess high aspect ratios. Morphology of the nanopits is significantly distinct from other look-alike nanostructures such as nanowells, nanoslits and nanotrenches. The high bulk sensitivity (1292 nm/RIU) of the nanosensor and lowest detectable surface concentration of BSA molecules (0.59–1.1 ng mm−2) are better than many of the contemporary nanosensors that include nanowells and nanovoids. We postulate the better sensing performance to result from the Fano-type resonances and unique morphology of hotspots in nanopits.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Materials Research Express

  • Publication date

    2019-10-23

  • Fields of study

    Biology, Physics, Materials Science, Chemistry, Engineering

  • Identifiers
    DOI 10.1088/2053-1591/ab33b9
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-41 of 41 references · Page 1 of 1

CITED BY

Showing 1-5 of 5 citing papers · Page 1 of 1