Template-assisted deposition of CTAB-functionalized gold nanoparticles with nanoscale resolution

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• 作者：Jean-Claude Tinguely^a ; ^{jctinguely@gmx.net} ; Gaë ; lle Charron^b ; ^{gaellecharron@gmail.com} ; Sté ; phanie Lau-Truong^b ; ^{stephanie.lau@univ-paris-diderot.fr} ; Andreas Hohenau^a ; ^{andreas.hohenau@uni-graz.at} ; Johan Grand^b ; ^{johan.grand@univ-paris-diderot.fr} ; Nordin Fé ; lidj^b ; ^{nordin.felidj@univ-paris-diderot.fr} ; Jean Aubard^b ; ^{jean.aubard@univ-paris-diderot.fr} ; Joachim R. Krenn^a ; ^{joachim.krenn@uni-graz.at}
• 关键词：APTES ; aminopropyltriethoxysilane ; CTAB ; cetyltrimethylammonium bromide ; DLS ; dynamic light scattering ; EBL ; electron beam lithography ; GNRs ; gold nanorods ; ITO ; indium tin oxide ; LSPs ; localized surface plasmons ; PMMA ; poly(methyl methacrylate) ; PSS ; pol
• 刊名：Journal of Colloid and Interface Science
• 出版年：2013
• 出版时间：15 March, 2013
• 年：2013
• 卷：394
• 期：Complete
• 页码：237-242
• 全文大小：611 K

文摘

In this paper, we demonstrate the template-assisted deposition of cetyltrimethylammonium bromide (CTAB) stabilized gold nanorods at lithographically defined positions on a substrate. Overcoating of the nanoparticles with polystyrenesulfonate allows to switch the original nanoparticles positive surface charge to negative and to apply the template-assisted deposition technique developed for citrate-capped gold nanoparticles also to CTAB stabilized nanoparticles. The successful, selective deposition of gold nanorods in trenches with widths down to 50 nm is demonstrated. Our results indicate the potential of this method for the fabrication of well controlled, reproducible plasmonic biosensing substrates, applicable to the vast palette of anisotropic nanoparticle shapes synthesized with CTAB as the templating agent.