Au-Au composites with inverse opal structure for surface-enhanced Raman spectroscopyстатья
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Дата последнего поиска статьи во внешних источниках: 11 сентября 2018 г.
Аннотация:Golden inverse opals additionally decorated with 15.5±1.5 nm gold nanoparticles are proposed as reusable substrates for surface-enhanced Raman spectroscopy (SERS). Gold nanoparticles are found to be uniformly distributed making an input of enhancement ability of spectral characteristics with the colloidal system by ten times. This technique is demonstrated to be efficientinspectralfeaturestuningviaacombinationofdifferentgoldderivatives.Twolasersservedforresonant,pre-resonance, and non-resonance signal analyses.ReusabilityoftheAu-Aucompositefilmsisdemonstratedformethyleneblueasastabledye deposited onto the SERS chips using a 632.8-nm resonant laser for exciting.The enhancement factor for methylene blue achieved 108 and for rhodamine 6G was of about 105. It was observed that rinsing of Au-Au nanocomposite SERS films with distilled water and heating up to 100 °C followed by dropping on a new portion of Au colloids onto the platform regenerates the substrates.