Nanoplasmonic colloidal suspensions for the enhancement of the luminescent emission from single-walled carbon nanotubes

Abstract

Aiming to enhance the luminescence yield of carbon nanotubes, we introduce a new class of hybrid nanoplasmonic colloidal systems (π-hybrids). Nanotubes dispersed in gold nanorod colloidal suspensions yield hybrid structures exhibiting enhanced luminescence up to a factor of 20. The novelty of the proposed enhancement mechanism relies on including metal proximity effects in addition to its localized surface plasmons. This simple, robust and flexible technique enhances the luminescence of nanotubes with chiralities whose enhancement has never reported before, for example the (8,4) tube

Chirality‐Selective Photoluminescence Enhancement of ssDNA‐Wrapped Single‐Walled Carbon Nanotubes Modified with Gold Nanoparticles

“…A small quenching distance on the order of the van der Waals distance was speculated . Later, enhanced PL of SWNTs was also reported by introducing gold colloids into SWNT suspensions . All these studies show that the PL enhancement of SWNTs by the SPR of gold is feasible.…”

Controlling the Decoration of the Reduced Graphene Oxide Surface with Pyrene‐Functionalized Gold Nanoparticles

“…To this purpose, we realized a novel set of nanohybrids incorporating SWCNTs and analyzed them through photoluminescence (PL) spectroscopy. Close proximity between gold nanoparticles and SWCNTs has already been demonstrated to enhance the SWCNT emission yield . We accordingly prepared two set of samples, namely SWCNTs coated just with the pyrene‐derivative (SWCNTs‐Py) and SWCNTs coated with PyAuNPs (2 nm; SWCNTs‐PyAuNPs).…”

Effect of hybrid isolation on the luminescence enhancement of carbon nanotube–gold nanorod composites

“…To avoid this, we have chosen to work at a SWNT concentration level far below the quenching threshold level (see [10]) and thus we do not encounter tube-tube quenching phenomena.…”

“…We demonstrated a 20-fold enhancement of the luminescent emission and the ability of involving nanotube chiralities for which no enhancement has been observed before [10]. Since our approach, the micelle encapsulation [12], yields p-hybrids with short SWNTs-gold separation, we work in the second scheme of the MEF processes.…”