Dulda, Ayşe

Article | 2018 | Eskişehir Technical University Journal of Science and and Technology a- Applied Sciences and Engineering (Online)19 ( 4 ) , pp.880 - 892

Fluorides despite been the most widely studied host matrices for many upconversion nanoparticles are usually hygroscopicand are of limited use. Hence, explorations of new upconversion host materials that will be more efficient in practicalapplication are still active areas of research. In this study, applicability of Ga2O3 as a host matrix for upconversionluminescence was investigated under near infrared (980 nm) excitation. XRD and FT-IR analysis indicate that changes in thecalcination temperature and dopant ion concentration lead to crystal phase transformation of nanoparticles from ?-Ga2O3 tocubic Yb3Ga5O12 garnet. Resulting chan . . .ges in crystal field and sites symmetries alter the behaviour of upconversion.Accordingly, tunable green, red and infrared luminescences were observed Daha fazlası Daha az

Keskin, A.Ü.

Book | 2018 | Ordinary Differential Equations for Engineers: Problems with MATLAB Solutions , pp.1 - 786

This monograph presents teaching material in the field of differential equations while addressing applications and topics in electrical and biomedical engineering primarily. The book contains problems with varying levels of difficulty, including Matlab simulations. The target audience comprises advanced undergraduate and graduate students as well as lecturers, but the book may also be beneficial for practicing engineers alike. © Springer Nature Switzerland AG 2019. All rights reserved.