Optical properties of dewetted thin silver/gold multilayer films on glass substrates

Large-scale dewetting assembly of gold nanoparticles for plasmonic enhanced upconversion nanoparticles

“…16 This dewetting method allows the shape and size of the Au nanoparticles to be precisely controlled on a large scale so that their plasmon resonance can be tuned to match the emission wavelength of Er 3+ emitters in NaYF 4 UCNPs 17 by simply varying the film thickness, annealing temperature and annealing time. 18,19 Secondarily, the annealing during the dewetting of the Au onto the surface of the CS UCNPs promotes the diffusion of Ln 3+ dopants within the UCNPs, reducing internal crystal defects which can lead to an increased quantum efficiency. 20 The design, consisting of an optically active UCNP core, an inert shell spacer and satellite plasmonic Au nanoparticles decorated on the shell, is chosen to suit the dewetting method for a large-scale assembly of Au nanoparticles onto single and mono-dispersed hybrid CS UCNPs.…”

Facet-Engineered Surfaces of Two-Dimensional Layered BiOI and Au–BiOI Substrates for Tuning the Surface-Enhanced Raman Scattering and Visible Light Photodetector Response

“…The deposition of noble metal nanoparticles, like Au and Ag on the surface of semiconductors, enhances the photocatalytic and molecular detecting applications. − Au and Ag metal nanoparticles (NPs) exhibit surface plasmon resonances which can be localized and tuned depending on shape, size, and interparticle distances. The localized surface plasmon resonances (LSPR) can be exploited for biosensing, photonic imaging, plasmon-enhanced solar energy harvesting, and optical nanoantennas applications. , The 2D layered nanosheet semiconductors like MoS 2 , n-type or p-type GaAs, and graphene decorated with Au nanoparticles by using electrodeposition and chemical synthesis could significantly enhance electrocatalytic reaction and surface-enhanced Raman spectroscopy (SERS)-activity. − The 2D layered materials attached with 0D or metal nanoparticles to form a combination of 0D/2D nanocomposite and metal nanoparticles decorated 2D materials to form core–shell heterostructures can be used for medical diagnostics and optoelectronic device applications. , A few reports have been focused on the utilization of the attractive features of the vertical alignment of plasmon sensing metal nanoparticles by different synthesis methods like solvent evaporation, cetyl trimethly ammonium bromide (CTAB)-capped, functionalizing Au nanorods with thiolated polystyrene and nanobipyramids into highly oriented vertical monolayer arrays on various substrates. − We have also found that noble metal nanoparticles could efficiently decorate vertically aligned 2D layered surface of MoS 2 microsheet for use as surface-enhanced Raman scattering substrates by electrodeposition technique .…”

An Immunosensor Based on Au-Ag Bimetallic NPs Patterned on a Thermal Resistant Flexible Polymer Substrate for In-Vitro Protein Detection

“…The mechanism of this method is to use a substrate material that will soften above its glass transition temperature ( T g ), while the continuous metal film on the top will aggregate to form nanoparticles and become embedded on the surface of the underlying substrate [26]. Specifically, different noble metals (e.g., gold, silver, and gold-silver alloy) have been immobilized on various rigid substrates (e.g., glass, silicon, TiO 2 ) to fabricate nanosensors for different applications via thermal annealing [24,27,28,29]. In our previous work, different sized gold nanoparticles (Au NPs) on a flexible PEN substrate had been obtained via vacuum evaporation combined with thermal annealing for the first time [13].…”