Fermi level equilibration of Ag and Au plasmonic metal nanoparticles supported on graphene oxide

Abstract

For the first time, the process of Fermi level equilibration has been studied and compared for plasmonic metal nanoparticles (PMNPs) supported on conducting substrates i.e. graphene oxide (GO) sheets.

Tuning the surface plasmon resonance in gold nanocrystals with single layer carbon nitride

“…Aromatic single layer moieties, such as graphene and reduced graphene oxide were reported to be perfect electron acceptors from metals and semiconductors [22][23][24]34,[38][39][40] while similar electron interaction between noble metal NCs and graphitic carbon nitride sheets were believed to be responsible for the advanced catalytic properties of such heterostructures. 21,25,30,31 A partial shi of the electron density from the Au NCs to the SLCN sheets should result in a decrease of the surface electron density N e and a lowering of the SPR energy.…”

“…The electronic properties of gold NCs can be strongly affected by coupling them with other conducting or semiconducting species by aligning the Fermi energies or charge transfer effects possible in such composites. 2,[21][22][23][24] Studies of Au NCs deposited on the surface of layered 2D materials, such as afew-layer graphene, graphitic carbon nitride (GCN), layered metal dichalcogenides are of special interest because Au NCs can strongly interfere with charge transfer across the basal plane of the adjacent layers and affect the optical, catalytic, and photochemical properties of the layered host materials. [21][22][23] In the particular case of GCN, which is one of the most promising 2D materials 21,25 probed currently for catalytic and sensoric applications, the decoration with Au NCs was reported to enhance the electrochemical, 21,26 catalytic, 21,27,28 and photocatalytic 21,27,[29][30][31] activity of the layered host.…”

“…24,26,32,33 At that, the strongest interaction between Au NCs and layered materials is expected for single-layer species, however, the reports on such composites are still quite rare. Typically, Au NCs are coupled with graphene 34 and graphene oxide, 24,32,33 yielding composites with perspectives for surface-enhanced Raman spectroscopic sensors 32,33 and catalysis. 32 However, no reports can be found, to the best of the authors' knowledge, on composites of Au NCs with single-layer carbon nitride (SLCN) species.…”

Copper/Cuprous Oxide Nanoparticles Decorated Reduced Graphene Oxide Sheets Based Platform for Bio‐Electrochemical Sensing of Dopamine

“…Recently, graphene oxide (GO) has been explored as a potential support material because of its intriguing properties such as good hydrophilicity and dispersibility in water owing to a large number of hydrophilic functional groups . Although the conductivity of GO is not as high as that of graphite, its surface properties and a strong affinity for biological molecules deem it to be a suitable contestant for bio‐sensing .…”

Heterojunction Photoelectrode of Polyaniline/ZnS Film/ZnO Nanorod on FTO Glass

“…Regarding visible-light sensitizers, studies on chalcogenide compound QDs such as CdS (Eg = 2.4 eV), CdSe (1.7 eV), and CdSSe (1.9 eV) have been reported [16], as well as those on plasmonic Ag and Au nanoparticles [17], transition metal dichalcogenide sheets such as MoS2 and WS2 [18], and metal halide perovskites such as CH3NH3PbI3 and CsPbBr3 [19]. However, it is important to develop alternative sensitizer materials, owing to the significant disadvantages of the abovementioned materials, such as the harmful nature of Cd, high cost of noble metals, and unstable moisture process.…”