A new plasmonic device made of gold nanoparticles and temperature responsive polymer brush on a silicon substrate

作者：Zengin Adem; Tamer Ugur; Caykara Tuncer^*

来源：Journal of Colloid and Interface Science, 2015, 448: 215-221.

DOI：10.1016/j.jcis.2015.02.027

• Temperature-responsive polymer brushes
• Phase transition temperature
• Gold nanoparticle
• Plasmonic device
• Surface-enhanced Raman spectroscopy

This paper reports a general stepwise route assembling interface-mediated RAFT polymerization of 2methoxyethoxy ethyl methacrylate and conversion of dodecyl trithiocarbonate end groups to thiol groups for gold nanoparticle assemblies. We intended by this way a new plasmonic device made of gold nanoparticles (Au NPs) and temperature responsive [poly((2-methoxyethoxy)ethyl) methacrylatei [Poly(MEO2-MA)] brush on a silicon substrate. This polymeric layer replies to temperature changing by conformational variation and is therefore able to change the distance between the Au NPs on the brush layer with 5,5-dithiobis(2-dinitrobenzoic acid) (DTNB). We show that an increment of the external temperature reversibly stimulates a significant increase of the DTNB SERS signal.

• 出版日期2015-6-15