The synthesis of nanoparticles from biological processes is evolving a new era of research interests in nanotechnology. The aim of this study was to determined antibacterial activity of silver nanoparticles produced by Rosmarinus officinalis L leaf extract against some human pathogenic bacteria. The formation and characterisation of AgNPs were confirmed by UV-Vis spectroscopy, energy-dispersive...

BACKGROUND Recently, the pulse-in-pulse mode of intense pulsed light (IPL) has been used increasingly for the treatment of melasma. OBJECTIVE To observe the morphologic changes in the melanophore in adult zebrafish after irradiation with conventional and pulse-in-pulse IPL and Q-switched Nd:YAG (QSNY) laser. METHODS Adult zebrafish were irradiated with conventional and pulse-in-pulse mode o...

The scope of the current research is to characterize aging mechanisms in LiFePO4 battery cathodes at the nanometer length scale. For this purpose, we wish to use Electron Energy Loss Spectroscopy (EELS) in the low loss regime in the Transmission Electron Microscope (TEM) to identify and quantify the phases formed in the cathode as the battery is discharged. The above phase identification and qu...

Quantitatively determining the atomic arrangement of nanomaterials is essential in nanoscience. While the traditional method of X-ray crystallography fails because of limited size of coherent structural domains within nanomaterials, a specialized approach, known as the atomic pair distribution function (PDF) method, has emerged as a powerful tool to obtain quantitative 3D structural information...

Recent years have seen an ever increasing interest in organic photovoltaics (OPV) [1]. As a result there is a high scientific demand for microstructural characterization of the various fabricated devices. Here we introduce several new techniques for examining OPV materials in a (scanning) transmission electron microscope (TEM/STEM) capable of electron energy-loss spectroscopy (EELS). The materi...

With the introduction of hardware aberration correction, direct electron detectors, ultra-bright electron sources and highly precise spectrometers, it seems like we are approaching the pinnacle of transmission electron microscopy (TEM) imaging and spectroscopy. However, the field of electron microscopy is still far from the ultimate signal-to-noise and efficiency limits imposed by electron scat...

Isolation of a single sheet of graphene indicated that strictly two-dimensional (2D) materials can exist at finite temperatures. Indeed, inorganic 2D systems such as hexagonal BN sheets, transition metal dichalcogenides (TMD) with a common structural formula MeX2, where Me stands for transition metals (Mo, W, Ti, etc.), X for chalcogens (S, Se, Te), and SiO2 layers were later manufactured by va...

Cadmium Sulfide crystals were grown by direct vapor transport (DVT) from high-purity starting materials. The grown CdS crystals were orange in color, transparent, dendrite platelets shaped were observed. The structure of CdS crystals has been studied with the help of X-ray diffraction (XRD) and Transmission Electron Microscope (TEM). The crystals grown by DVT technique possess hexagonal structu...