Reduced graphene oxide as a stabilizing layer for optical properties of porous silicon

An economic and facile method for graphene oxide preparation from graphite powder

“…The peak '2D' at around 2690 cm −1 is the second order of the D peak, referred to an overtone of the D peak, and it is the result of a two-phonon lattice vibrational process [34,35]. It is conventionally assigned to the number of graphene layers.…”

“…GO can be readily modified for a particular use due to the presence of abundant oxygen-containing functional groups and can be used as functional materials for various applications [9][10][11][12]. In addition, GO materials, which are biocompatible and hydrophilic, have wide potential applications in biomedical engineering and biotechnology.…”

Porous Silicon-Based Photonic Biosensors: Current Status and Emerging Applications

“…As already mentioned, one of the most advantageous properties of PSi is its large surface area (up to 800 m 2 g –1 ) and high internal volume, allowing for numerous biomolecular interactions to occur over a small working area. Furthermore, PSi can serve as a host matrix for diverse compounds and nanomaterials, including polymers, − metals, − quantum dots (QDs), − fluorescent molecules, − graphene oxide (GO), − carbon nanotubes (CNTs), , and carbon dots (C-dots) . The main advantage of these PSi-based hybrid systems is that they can exhibit superior sensing performance in comparison to the individual components, such as signal enhancement, higher sensitivity, improvement of signal stability, and dual-mode detection.…”

“…Studies on the incorporation of carbon-based materials, such as graphene oxide (GO) − and carbon nanotubes (CNTs), ,, into different PSi nanostructures have shown interesting optical properties of the resulting hybrids. For example, GO/PSi hybrid systems were found to exhibit significant PL enhancement and were therefore suggested as potentially suitable transducers for biosensing applications .…”