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Uniform distribution of Ag particles upon imprinted polymer grating for Raman signal enhancement

Daniel, Salman ; Matikainen, Antti ; Turunen, Jari ; Vahimaa, Pasi ; Nuutinen, Tarmo

Journal of colloid and interface science, 2015-01, Vol.437, p.119-123 [Periódico revisado por pares]

United States: Elsevier Inc

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  • Título:
    Uniform distribution of Ag particles upon imprinted polymer grating for Raman signal enhancement
  • Autor: Daniel, Salman ; Matikainen, Antti ; Turunen, Jari ; Vahimaa, Pasi ; Nuutinen, Tarmo
  • Assuntos: Cyclo olefin polymer ; Deposition ; Fingerprints ; Gratings (spectra) ; Microscopy, Electron, Scanning ; Modulation ; Nanoparticles ; Polymers - chemistry ; Raman scattering ; Reproducibility ; Silver ; Silver - chemistry ; Silver colloid ; Spectrum Analysis, Raman - methods ; Subwavelength grating ; Surface enhanced Raman scattering ; Surface uniformity
  • É parte de: Journal of colloid and interface science, 2015-01, Vol.437, p.119-123
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: [Display omitted] •Uniform and non-aggregated distribution of AgNPs on 1D modulated polymer.•Improved reproducibility for SERS applications.•Close settlement of AgNPs inside the grooves for Raman signal enhancements.•Fabrication of the SERS substrate is inexpensive and quick in practice.•This method favors to overcome the tarnishing effect. Surface Enhanced Raman Scattering (SERS) is gaining popularity among analytical methods in biosciences and sensor technology since it provides high specificity, non-destructiveness, and the unique fingerprint spectra of the molecules. Historically, glass has been the primary choice as a substrate for SERS, but polymers are attractive due to their plasticity, ease of handling, and their low cost. Herein, the performance of cyclo olefin polymer (COP) as a substrate with 1D subwavelength modulations combined with silver nanoparticles is studied for SERS measurements. These 1D grating structures on polymer are fabricated by hot embossing method followed by deposition of silver nanoparticles (AgNPs) using the drop-casting method. Spatial variations of the substrate surface have been reduced by providing a consistent distribution of hot-spots. We present an analysis of the surface uniformity related to the distribution of Ag particles. We achieve around 8-fold Raman signal enhancements with improved reproducibility in comparison to smooth, unmodulated surfaces with AgNPs. This method of fabrication of SERS substrates is simple and inexpensive compared to the thermal evaporation method (TEM) of metallic layer deposition. It also helps to control the tarnishing effect on metallic surfaces due to silver deposition prior to Raman measurements. This kind of polymer gratings combined with AgNPs have potential applications in medical, biological and chemical sensing, where Raman signal enhancement with high reproducibility is required.
  • Editor: United States: Elsevier Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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