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Abdullah Saleh Aldwayyan

Professor

Member of KSU scientific council as a representative of the college of sciences

كلية العلوم
College of Science, Physics and Astronomy Dept. Office 2A23
المنشورات
مقال فى مجلة
2015

Structural and Spectroscopic Characterization of PM 597 Dye-Silica Core-Shell Nanoparticles

Al-Biladi, Tahani R. . 2015

Nanostructured fluorescent pyrromethene (PM) doped-silica core-shell particles were successfully prepared by Stöber process. The average size of the particles was in the range of 10–20 nm measured by TEM micrograph. The atomic structure and morphology of PM 597/SiO2 core/shell nanoparticles were studied by AFM and SEM, respectively. Absorption and emission spectra of the PM 597/SiO2 core/shell nanoparticles under the UV irradiation were studied and not significantly influenced at the position of peaks. Finally, amplified spontaneous emission (ASE) and photobleaching of dye were examined and found no significant influence on the peaks of PM dye due to the formation of smaller sizes of PM 597/SiO2 core/shell nanoparticles. The observed PM 597/SiO2 core/shell nanoparticles were different in shapes with smaller size distribution and highly luminescent. Majority of nanoparticles were roughly spherical with many of them aggregated. The less photobleaching of dye core may be due to the protection of pumped energy by SiO2 shell and restricts the leakage of dye.

نوع عمل المنشور
Mater
رقم المجلد
2015
رقم الانشاء
Article ID 901032
مجلة/صحيفة
Journal of Spectroscopy
الصفحات
1 to 7
مزيد من المنشورات
publications

In this study, we investigated the optoelectronic properties of cubic (Pm3m) and orthorhombic (Pnma) CsPbX3 (X = I, Br, and Cl). We utilized the full potential linear augmented plane wave method,…

بواسطة H. M. Ghaithan, S. M. H. Qaid, Z. A. Alahmed, H. S. Bawazir and A. S. Aldwayyan
2023
تم النشر فى:
Materials
publications

The goal of this research is to see how excitation wavelength affects steady-state photoluminescence (PL), time-resolved photoluminescence (TRPL), and amplified spontaneous emission (ASE) in…

بواسطة Qaid, SMH ; Ghaithan, HM Ghaithan,; Aldwayyan, AS
2023
publications

A solid redox mediator (solid electrolyte) with an electrical conductivity (σ25°C) greater than 10−4 S cm−1 is an essential requirement for a dye-sensitized solar cell in the harsh weather of Gulf…

بواسطة R. Gupta, H. Shaikh, A. Imran, I. Bedja, A.F. Ajaj, A. S. Aldwayyande, A. Khan and R. Ayub
2024