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Self-organized spatially separated silver 3D dendrites as efficient plasmonic nanostructures for Surface-enhanced Raman spectroscopy applications

Dzmitry V Yakimchuk; Egor Yu Kaniukov; Sergey Lepeshov; Victoria D Bundyukova; Sergey E Demyanov; Grigory M Arzumanyan; Nelya V Doroshkevich; Kahramon Z Mamatkulov; Arne Bochmann; Martin Presselt; Ondrej Stranik; Soslan A Khubezhov; Alex Krasnok; Andrea Alù; Vladimir A Sivakov

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<oai_dc:dc xmlns:dc="" xmlns:oai_dc="" xmlns:xsi="" xsi:schemaLocation="">
  <dc:creator>Dzmitry V Yakimchuk</dc:creator>
  <dc:creator>Egor Yu Kaniukov</dc:creator>
  <dc:creator>Sergey Lepeshov</dc:creator>
  <dc:creator>Victoria D Bundyukova</dc:creator>
  <dc:creator>Sergey E Demyanov</dc:creator>
  <dc:creator>Grigory M Arzumanyan</dc:creator>
  <dc:creator>Nelya V Doroshkevich</dc:creator>
  <dc:creator>Kahramon Z Mamatkulov</dc:creator>
  <dc:creator>Arne Bochmann</dc:creator>
  <dc:creator>Martin Presselt</dc:creator>
  <dc:creator>Ondrej Stranik</dc:creator>
  <dc:creator>Soslan A  Khubezhov</dc:creator>
  <dc:creator>Alex Krasnok</dc:creator>
  <dc:creator>Andrea Alù</dc:creator>
  <dc:creator>Vladimir A Sivakov</dc:creator>
  <dc:description>Surface-enhanced Raman spectroscopy (SERS) is a promising optical method for analyzing molecular samples of various nature. Most SERS studies are of an applied nature indicating a serious potential for their application in analytical practice. Dendrite-like nanostructures have great potential for SERS, but the lack of a method for their predictable production significantly limits their implementation. In this paper, a method for controllable obtaining spatially separated, self-organized and highly-branched silver dendrites via template synthesis in pores of SiO2/Si is proposed. The dendritic branches have nanoscale roughness creating many plasmon-active “hot spots” required for SERS. The first held 3D modeling of the external electromagnetic wave interaction with such a dendrite, as well as experimental data, confirm this theory. Using the example of a reference biological analyte, which is usually used as a label for other biological molecules, the dendrites SERS-sensitivity up to 10–15 M was demonstrated with Enhancement factor of 108. The comparison of simulation results with SERS experiments allows distinguishing the presence of electromagnetic and chemical contributions, which have a different effect at various analyte concentrations.</dc:description>
  <dc:title>Self-organized spatially separated silver 3D dendrites as efficient plasmonic nanostructures for Surface-enhanced Raman spectroscopy applications</dc:title>
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