Wearable Health Devices are proving to be extremely helpful for people to keep a check on their health conditions. People can monitor their status at a fitness level and also at the proper medical level. With already a number of smart products in the market and the surge in the implementation IoT and AI in the healthcare sector, it is safe to say that the future lies in virtual healthcare and Wearable Health Devices. The cover photo of this October 2019 issue is inspired by the editorial article "Wearable Healthcare Devices", by Dr. Ashutosh Tiwari.
Influence of Iron Doping on Structural and Optical Properties of Nickel Oxide Nanoparticles
Nashiruddin Ahammed1*, M. Mehedi Hassan2
1Department of Physics, Govt. General Degree College, Muragachha, Nadia, W.B. 741154, India
2Sensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, W.B. 700032, India
Adv. Mater. Lett., 2019, 10 (10), pp 746-751
Publication Date (Web): Mar 11, 2019
Copyright © 2019 VBRI Press
In this article, auto combustion prepared Ni1-xFexO (0≤x≤0.10) nanoparticles (NPs) have been investigated for their structural, morphological and optical properties. X-ray diffraction (XRD) studies reveal that all Fe doped NiO samples crystallize in single phase without any impurity. The crystallite size monotonically decreases from 20 nm to 10 nm with increasing Fe substitution. Transmission Electron Microscope images represent that the synthesized NiO NPs with size around 28 nm. A red shift in UV-Vis spectra indicates that band gap can be tuned by Fe doping from 3.76 eV to 2.51 eV because of the upward shifting of t2g level. The broad transmittance peak in Fourier transform infra-red spectra at 500 cm-1 is assigned to Ni–O stretching vibration mode. Differential scanning calorimetry curve revealed that the transition at 250 oC was exothermic because of structural relaxation. © VBRI Press.
Nickel oxide nanoparticle, XRD, TEM, band gap.