Assembly of Plasmonic Nanoparticles on Nanopatterns of Polymer Brushes Fabricated by Electrospin Nanolithography
Kiremitler, N. Burak (Erciyes University. Department of Materials Science and Engineering)
Pekdemir, Sami (Erciyes University. Department of Materials Science and Engineering)
Patarroyo, Javier (Institut Català de Nanociència i Nanotecnologia)
Karabel, Sema (Erciyes University. Department of Materials Science and Engineering)
Torun, Ilker (Erciyes University. Department of Materials Science and Engineering)
Puntes, Víctor (Institut Català de Nanociència i Nanotecnologia)
Onses, M. Serdar (Erciyes University. Department of Materials Science and Engineering)

Fecha:	2017
Resumen:	This paper presents electrospin nanolithography (ESPNL) for versatile and low-cost fabrication of nanoscale patterns of polymer brushes to serve as templates for assembly of metallic nanoparticles. Here electrospun nanofibers placed on top of a substrate grafted with polymer brushes serve as masks. The oxygen plasma etching of the substrate followed by removal of the fibers leads to linear patterns of polymer brushes. The line-widths as small as ∼50 nm can be achieved by precise tuning of the diameter of fibers, etching condition, and fiber-substrate interaction. Highly aligned and spatially defined patterns can be fabricated by operating in the near-field electrospinning regime. Patterns of polymer brushes with two different chemistries effectively directed the assembly of gold nanoparticles and silver nanocubes. Nanopatterned brushes imparted strong confinement effects on the assembly of plasmonic nanoparticles and resulted in strong localization of electromagnetic fields leading to intense signals in surface-enhanced Raman spectroscopy. The scalability and simplicity of ESPNL hold great promise in patterning of a broad range of polymer thin films for different applications.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Nanofabrication ; Polymer brushes ; Electrospinning ; Nanofibers
Publicado en:	ACS Macro Letters, Vol. 6, Issue 6 (June 2017) , p. 603-608, ISSN 2161-1653

DOI: 10.1021/acsmacrolett.7b00288

Postprint 18 p, 953.3 KB

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