Sandwiched gold/PNIPAm/gold microstructures for smart plasmonics application: Towards the high detection limit and Raman quantitative measurements

R. Elashnikov, D. Mares, T. Podzimek, V. Švorčík, O. Lyutakov

Результат исследований: Материалы для журналаСтатья

9 Цитирования (Scopus)

Выдержка

A smart plasmonic sensor, comprising a layer of a stimuli-responsive polymer sandwiched between two gold layers, is reported.As a stimuli-responsive material, a monolayer of poly(N-isopropylacrylamide) (PNIPAm) crosslinked globules is used.A quasi-periodic structure of the top gold layer facilitates efficient excitation and serves as a support for plasmon excitation and propagation.The intermediate layer of PNIPAm efficiently entraps targeted molecules from solutions.The sensor structure was optimized for efficient light focusing in the "active" PNIPAm layer.The optimization was based on the time-resolved finite-element simulations, which take into account the thickness of gold layers, size of PNIPAm globules and Raman excitation wavelength (780 nm).The prepared structures were characterized using SEM, AFM, UV-Vis refractometry and goniometry.Additional AFM scans were performed in water at two temperatures corresponding to the collapsed and swollen PNIPAm states.The Raman measurements demonstrate a high detection limit and perfect reproducibility of the Raman scattering signal for the prepared sensor.In addition, the use of created SERS structures for the detection of relevant molecules in the medical, biological and safety fields was demonstrated.

Язык оригиналаАнглийский
Страницы (с-по)2974-2981
Число страниц8
ЖурналAnalyst
Том142
Номер выпуска16
DOI
СостояниеОпубликовано - 21 авг 2017
Опубликовано для внешнего пользованияДа

Отпечаток

Gold
Limit of Detection
microstructure
gold
Microstructure
Smart sensors
Molecules
Periodic structures
Sensors
sensor
Raman scattering
Monolayers
Refractometry
Raman Spectrum Analysis
Wavelength
Scanning electron microscopy
Polymers
poly-N-isopropylacrylamide
detection
Water

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

Цитировать

Sandwiched gold/PNIPAm/gold microstructures for smart plasmonics application : Towards the high detection limit and Raman quantitative measurements. / Elashnikov, R.; Mares, D.; Podzimek, T.; Švorčík, V.; Lyutakov, O.

В: Analyst, Том 142, № 16, 21.08.2017, стр. 2974-2981.

Результат исследований: Материалы для журналаСтатья

Elashnikov, R. ; Mares, D. ; Podzimek, T. ; Švorčík, V. ; Lyutakov, O. / Sandwiched gold/PNIPAm/gold microstructures for smart plasmonics application : Towards the high detection limit and Raman quantitative measurements. В: Analyst. 2017 ; Том 142, № 16. стр. 2974-2981.
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