Tuning of the band gap and dielectric loss factor by Mn doping of Zn1-xMnxO nanoparticles oleh Wiqar Hussain Shah, Azeema Alam, Hafsa Javed, Khadija Rashid, Akhtar Ali, Liaqat Ali, Akif Safeen, Muhammad R. Ali, Naveed Imran, Muhammad Sohail, Gilbert Chambashi