Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy

Mehmet Yilmaz, Esra Babur, Mehmet Ozdemir, Rebecca L. Gieseking, Yavuz Dede, Ugur Tamer, George C Schatz, Antonio Facchetti, Hakan Usta, Gokhan Demirel

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

π-Conjugated organic semiconductors have been explored in several optoelectronic devices, yet their use in molecular detection as surface-enhanced Raman spectroscopy (SERS)-active platforms is unknown. Herein, we demonstrate that SERS-active, superhydrophobic and ivy-like nanostructured films of a molecular semiconductor, α,ω-diperfluorohexylquaterthiophene (DFH-4T), can be easily fabricated by vapour deposition. DFH-4T films without any additional plasmonic layer exhibit unprecedented Raman signal enhancements up to 3.4 × 103 for the probe molecule methylene blue. The combination of quantum mechanical computations, comparative experiments with a fluorocarbon-free α,ω-dihexylquaterthiophene (DH-4T), and thin-film microstructural analysis demonstrates the fundamental roles of the π-conjugated core fluorocarbon substitution and the unique DFH-4T film morphology governing the SERS response. Furthermore, Raman signal enhancements up to ∼1010 and sub-zeptomole (<10-21 mole) analyte detection were accomplished by coating the DFH-4T films with a thin gold layer. Our results offer important guidance for the molecular design of SERS-active organic semiconductors and easily fabricable SERS platforms for ultrasensitive trace analysis.

Original languageEnglish
Pages (from-to)918-924
Number of pages7
JournalNature Materials
Volume16
Issue number9
DOIs
Publication statusPublished - Sep 1 2017

Fingerprint

Semiconducting organic compounds
organic semiconductors
Raman spectroscopy
Fluorocarbons
fluorocarbons
platforms
Trace analysis
Vapor deposition
augmentation
Methylene Blue
methylene blue
optoelectronic devices
Gold
Optoelectronic devices
Substitution reactions
vapor deposition
substitutes
Semiconductor materials
gold
coatings

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Yilmaz, M., Babur, E., Ozdemir, M., Gieseking, R. L., Dede, Y., Tamer, U., ... Demirel, G. (2017). Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy. Nature Materials, 16(9), 918-924. https://doi.org/10.1038/nmat4957

Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy. / Yilmaz, Mehmet; Babur, Esra; Ozdemir, Mehmet; Gieseking, Rebecca L.; Dede, Yavuz; Tamer, Ugur; Schatz, George C; Facchetti, Antonio; Usta, Hakan; Demirel, Gokhan.

In: Nature Materials, Vol. 16, No. 9, 01.09.2017, p. 918-924.

Research output: Contribution to journalArticle

Yilmaz, M, Babur, E, Ozdemir, M, Gieseking, RL, Dede, Y, Tamer, U, Schatz, GC, Facchetti, A, Usta, H & Demirel, G 2017, 'Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy', Nature Materials, vol. 16, no. 9, pp. 918-924. https://doi.org/10.1038/nmat4957
Yilmaz, Mehmet ; Babur, Esra ; Ozdemir, Mehmet ; Gieseking, Rebecca L. ; Dede, Yavuz ; Tamer, Ugur ; Schatz, George C ; Facchetti, Antonio ; Usta, Hakan ; Demirel, Gokhan. / Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy. In: Nature Materials. 2017 ; Vol. 16, No. 9. pp. 918-924.
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