Cover Page October-2019-Advanced Materials Letters

Advanced Materials Letters

Volume 10, Issue 10, Pages 746-751, October 2019
About Cover

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 Hassan 

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

DOI: 10.5185/amlett.2019.0004

Publication Date (Web): Mar 11, 2019

E-mail: nashiruddin73@gmail.com

Abstract

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.

Keywords

Nickel oxide nanoparticle, XRD, TEM, band gap.

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