Carbon nanostructure (0-3 dimensional) supported isolated gold nanoparticles as an effective SERS substrate

Shiju Abraham, Matthias König, Sunil K. Srivastava, Vinod Kumar, Bernd Walkenfort, Anchal Srivastava

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


The present work reports a comparative surface enhanced Raman scattering (SERS) study of nanohybrids of spatially isolated gold nanoparticles (Au NPs) with different carbon nanostructures (CNS). For a meticulous comparative analysis, different CNS covering from zero dimensional to three dimensions were used. SERS activities of developed nanohybrids platforms were evaluated with a Raman marker i.e. Mercaptobenzoic acid (4-MBA, 1 μM). Synergistic Raman signal enhancement from each Au NP (electromagnetic enhancement) and underlying CNS matrix (chemical enhancement) was observed in nanohybrid enabling detection of very small concentration of 4-MBA i.e. 1 μM convincingly. Among the different underlying matrix, GQDs-Au NPs based SERS platform have shown highest SERS enhancement by a factor of 107, followed by GO-Au NPs combination (∼ 3 × 106) and others. Enhanced SERS activity of GQDs -Au NPs -4-MBA nanohybrid platform is attributed to the D and G bands of GQDs, overpowering the strong fluorescent background of GQDs alone. Reported nanohybrids; specially GQDs-Au NPs offers numerous possibilities to be used as sensitive and reproducible SERS platform for the detection of other biologically/chemically important analytes, showing potential for standardization in near future.

Original languageEnglish
Pages (from-to)455-465
Number of pages11
JournalSensors and Actuators, B: Chemical
StatePublished - 10 Nov 2018


  • Carbon nanostructures
  • Isolated gold nanoparticles
  • Raman marker
  • SERS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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