A new plasmonic device made of gold nanoparticles and temperature responsive polymer brush on a silicon substrate.
This paper reports a general stepwise route assembling interface-mediated RAFT polymerization of 2-methoxyethoxy 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) methacrylate] [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.
Gazi University, Faculty of Science, Department of Chemistry, 06500 Besevler, Ankara, Turkey; Gazi University, Faculty of Pharmacy, Department of Analytical Chemistry, 06330 Etiler, Ankara, Turkey.
Adem
A
Zengin
Gazi University, Faculty of Pharmacy, Department of Analytical Chemistry, 06330 Etiler, Ankara, Turkey.
Ugur
U
Tamer
Gazi University, Faculty of Science, Department of Chemistry, 06500 Besevler, Ankara, Turkey. Electronic address: caykara@gazi.edu.tr.
Tuncer
T
Caykara
D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008689:Methacrylates / Q000737:chemistry*; D009579:Nitrobenzoates / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties; D013696:Temperature; D044366:Transition Temperature
D008689:Methacrylates; D009579:Nitrobenzoates; C581192:poly(2-(2-methoxyethoxy)ethyl methacrylate); C109832:2,4-dinitrobenzoic acid; D006046:Gold; D012825:Silicon
Gold nanoparticle; Phase transition temperature; Plasmonic device; Surface-enhanced Raman spectroscopy; Temperature-responsive polymer brushes