SERS and FDTD simulation of gold nanoparticles grafted on germanium wafer via galvanic displacement. (4th December 2014)

• Record Type: Journal Article
• Authors: Zhang, Zhaoshun; Liao, Fan; Ma, Shuzhen; Gao, Suning; Shao, Mingwang
• Is Part Of: Surface and interface analysis. Volume 47:Number 3(2015)
• Page Start: 398
• Page End: 402
• Publication Date: 2014-12-04
• Subjects: Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Thin films -- Periodicals; 541.33
• DOI: 10.1002/sia.5727
• Languages: English
• ISSNs: 0142-2421

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Uniform and dense Au nanoparticles grown on Ge (Au/Ge) were fabricated by a facile galvanic displacement method and employed as surface‐enhanced Raman scattering (SERS) substrates. The substrates exhibited excellent reproducibility in the detection of rhodamine 6G aqueous solution with a relative standard deviation of &lt;20%. The substrate showed a high Raman enhancement factor of 3.44 × 10⁶. This superior SERS sensitivity was numerical confirmed by the three‐dimensional finite‐difference time‐domain method, which demonstrated a stronger electric field intensity (|<italic>E</italic>/<italic>E</italic>₀|²) distribution around the Au nanoparticles grown on Ge. This facile and low‐cost prepared Au/Ge substrate with high SERS sensitivity and reproducibility might have potential applications in monitoring <italic>in situ</italic> reaction in aqueous solution. Copyright © 2014 John Wiley &amp; Sons, Ltd.</p> </abstract>