Applications of carbon quantum dots in electrochemical energy storage devices.

Supercapacitors (SCs), including electric double-layer capacitors (EDLCs), pseudocapacitors, and hybrid capacitors, are esteemed for their high power density and attractive features such as robust safety, fast charging, low maintenance, and prolonged cycling lifespan, sparking significant interest. Carbon quantum dots (CQDs) are fluorescent nanomaterials with small size, broad excitation spectrum, stable fluorescence, and adjustable emission wavelengths. They are widely used in optoelectronics, medical diagnostics, and energy storage due to their biocompatibility, low toxicity, rich surface functional groups, abundant electron-hole pairs, large specific surface area, and tunable heteroatom doping.

Influence of Sputtering Temperature of TiO Deposited onto Reduced Graphene Oxide Nanosheet as Efficient Photoanodes in Dye-Sensitized Solar Cells.

Renewable solar energy is the key target to reduce fossil fuel consumption, minimize global warming issues, and indirectly minimizes erratic weather patterns. Herein, the authors synthesized an ultrathin reduced graphene oxide (rGO) nanosheet with ~47 nm via an improved Hummer's method. The TiO was deposited by RF sputtering onto an rGO nanosheet with a variation of temperature to enhance the photogenerated electron or charge carrier mobility transport for the photoanode component.

Development of graphene based nanocomposites towards medical and biological applications.

Graphene and its derivative materials present high potential towards medical and biological applications, including drug delivery and bioimaging, due to their exceptional properties such as thermal conductivity and high specific surface area. The main focus of this work is to review the current development of graphene materials and the derivatives for biocompatible, bioimaging and drug delivery applications. Also, the synthesis methods with variation of graphene nanocomposites and the functionalisation will be further explained.

Influence of Temperature Reaction for the CdSe-TiO Nanotube Thin Film Formation via Chemical Bath Deposition in Improving the Photoelectrochemical Activity.

In this present work, we report the deposition of cadmium selenide (CdSe) particles on titanium dioxide (TiO) nanotube thin films, using the chemical bath deposition (CBD) method at low deposition temperatures ranging from 20 to 60 °C. The deposition temperature had an influence on the overall CdSe-TiO nanotube thin film morphologies, chemical composition, phase transition, and optical properties, which, in turn, influenced the photoelectrochemical performance of the samples that were investigated. All samples showed the presence of CdSe particles in the TiO nanotube thin film lattice structures with the cubic phase CdSe compound.

Development of hydrophobic reduced graphene oxide as a new efficient approach for photochemotherapy.

Nowadays, chemotherapy is one of the crucial and common therapies in the world. So far, it has been revealed to be highly promising, yet patients suffer from the consequences of severe negative medical dosages. In order to overcome these issues, the enhancement of photothermal chemotherapy with reduced graphene oxide (rGO) as a photothermal agent (PTA) is widely utilised in current medical technologies.

An investigation of the stirring duration effect on synthesized graphene oxide for dye-sensitized solar cells.

This study investigates the effects of stirring duration on the synthesis of graphene oxide (GO) using an improved Hummers' method. Various samples are examined under different stirring durations (20, 40, 60, 72, and 80 h). The synthesized GO samples are evaluated through X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and Raman spectroscopy.

Facile Synthesis of High Quality Graphene Oxide from Graphite Flakes Using Improved Hummer's Technique.

Graphene is a promising candidate for making next-generation nanotechnology devices due to its outstanding properties in terms of physical, chemical, mechanical aspects. Based on the theoretical point of view, graphene is a two-dimensional (2D) crystal structure with sp2 hybridized carbon atoms arrangement and has attracted extensive attention in a considerable number of applications such as solar energy, sensor and energy storage, naming a few. Herein, graphene oxide (GO) is synthesized from graphite flakes using the Improved Hummer's method.