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dc.contributor.authorTan, Joel Min Ruien
dc.contributor.authorGoh, Madeline Shuhuaen
dc.contributor.authorLee, Yih Hongen
dc.contributor.authorPedireddy, Srikanthen
dc.contributor.authorPhang, In Yeeen
dc.contributor.authorTjiu, Weng Weeien
dc.contributor.authorLing, Xing Yien
dc.description.abstractThe effective number of surface-enhanced Raman spectroscopy (SERS) active hot spots on plasmonic nanostructures is the most crucial factor in ensuring high sensitivity in SERS sensing platform. Here we demonstrate a chemical etching method to increase the surface roughness of one-dimensional Ag nanowires, targeted at creating more SERS active hot spots along Ag nanowire’s longitudinal axis for increased SERS detection sensitivity. Silver nanowires were first synthesized by the conventional polyol method and then subjected to chemical etching by NH4OH and H2O2 mixture. The surfaces of silver nanowires were anisotropically etched off to create miniature “beads on a string” features with increased surface roughness while their crystallinity was preserved. Mapping of single-nanowire SERS measurements showed that the chemical etching method has overcome the limitation of conventional one-dimensional Ag nanowires with limited SERS active area at the tips to produce etched Ag nanowires with an increase in Raman hot spots and polarization-independent SERS signals across tens of micrometers length scale.en
dc.rights© 2012 American Chemical Society.en
dc.titleA chemical route to increase hot spots on silver nanowires for surface-enhanced Raman spectroscopy applicationen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
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