Optical properties and Judd-Ofelt analysis of Dy doped CoAlO nanocrystals.

CoAlO:Dy nanocrystals ( = 0, 0.1, 0.5, 1.

Thermoluminescence properties and new insights on the UV-vis absorption features of colorless quartz after γ-ray irradiation.

In this paper, we present the results of research on the thermoluminescence (TL) and optical absorption (OA) properties of colorless natural quartz (including natural quartz samples, sodium ion (Na) rich samples (by diffusion), and alkali metal (M) ion poor samples (by sweep)). In detail, the relationship between the TL glow peaks and the emission wavelength was determined. The dynamics parameters ( , , ) have been computed for all TL peaks on the glow curve.

New insights on the optical properties and upconversion fluorescence of Er-doped CoAlO nanocrystals.

In this study, Er-doped CoAlO nanocrystals (NCs) were synthesized co-precipitation. All the NCs were crystallized in the form of a single phase with a spinel structure and Er ions replaced Al ions in the formation of the CoAlErO alloy structure. The optical characteristics of the Er ion-doped CoAlO NCs were thoroughly investigated by analyzing both the UV-VIS and photoluminescence spectra, using the Judd-Ofelt theory.

Controlling the optical and magnetic properties of CdTeSe and Gd-doped CdTeSe alloy semiconductor nanocrystals.

In this study, CdTeSe (0 ≤ ≤ 1) and CdTeSe:Gd % ( = 0-8.05) alloy semiconductor nanocrystals (NCs) were prepared by wet chemical method. The presence and composition of the elements in the sample were determined by energy dispersive X-ray (EDX) spectroscopy and X-ray photoelectron spectroscopy (XPS).

New insights on the luminescence properties and Judd-Ofelt analysis of Er-doped ZnO semiconductor quantum dots.

In this study, Er doped ZnO semiconductor quantum dots (QDs) were synthesized using a wet chemical method. The successful doping of Er ions into the ZnO host lattice and the elemental composition was confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The ZnO and Er doped ZnO QDs with a hexagonal structure, spherical shape, and particle size of approximately 5 nm were revealed by XRD and transmission electron microscopy (TEM).

Effect of dopant concentration and the role of ZnS shell on optical properties of Sm doped CdS quantum dots.

The role of samarium (Sm) dopant on the structural, morphological, and optical properties of CdS QDs and CdS/ZnS core/shell QDs was methodically reported. The synthesis of Sm-doped CdS QDs and CdS/ZnS QDs was carried out a facile wet chemical method. The structure, chemical composition, and optical properties of the synthesized QDs were investigated by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy (RS), and photoluminescence (PL) spectroscopy.

The sensitive detection of methylene blue using silver nanodecahedra prepared through a photochemical route.

In this work, we have carried out systematic studies on the critical role of polyvinyl pyrrolidone (PVP) and citrate in the well-known chemical reduction route to synthesize silver nanodecahedra (AgND). Silver nitrate (AgNO) was used as silver source, which can be directly converted to metallic silver after being reduced by sodium borohydride (NaBH) under blue light-emitting diode (LED) irradiation ( = 465 nm), and polyvinyl pyrrolidone (PVP) as a capping agent to assist the growth of AgND. The obtained products were silver nanodecahedra of excellent uniformity and stability with high efficiency and yield.

Influence of precursor ratio and dopant concentration on the structure and optical properties of Cu-doped ZnCdSe-alloyed quantum dots.

Tunable copper doped Zn Cd S alloy quantum dots (QDs) were successfully synthesized by the wet chemical method. A one-step method is developed to synthesize doped ternary QDs which is more preferable than a two-step method. The influence of experimental parameters like the Zn/Cd ratio and Cu dopant concentration has been investigated using various spectroscopic techniques like UV-visible, photoluminescence, X-ray diffraction and Raman spectroscopy.