Effect of growth time on structural, electrical andmorphological properties of manganese dioxide nanowires

Mohd Zaharuddin, Izzuddin (2022) Effect of growth time on structural, electrical andmorphological properties of manganese dioxide nanowires. [Project Paper] (Submitted)

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Abstract

Phase transformation and surface modification of Metal-Transition Oxide (TMO) Materials had emerged an interest study due to its excellent anisotropy property in optoelectronic devices. There is various approach has been implemented to modify the nanostructure which is not limited to the doping, physic controlled growth and surfactant controlled system. Among the TMO materials, MnO2 is recognized as one of the outstanding materials that is commonly used in the green energy storage devices, owing to its polymorphic nature. However, the detail understanding in the phase transformation mechanism and properties modification of this material is remain uncertain. In this project, a detail correlation between the structural changes of MnO2 nanowires was study in term of different growth time. The kinetic and thermodynamic growth system in the phase changes was also elucidate. When the growth time increased from 3h to 9h, the MnO2 nanowire was found successfully transformed from hollandite phase α-MnO2 to pyrolusite  phase (β-MnO2) before further extend to λ-MnO2. This result is further validated from the decreasing of crystalline size as calculated from the XRD analysis. Furthermore, the changes of the tunnel structures in MnO2 nanowires also leading to the highest conductivity as recorded in the 3h MnO2 sample. This result had proved that the different growth time has resulting to the phase and structural transformation in MnO2 nanowire design. This approach can be used as a benchmark methodology for fundamental understanding in polymorphous formation that applicable in optoelectronic devices.

Item Type:	Project Paper
Faculty:	Fakulti Sains
Depositing User:	Ms. ROHANA ALIAS
Date Deposited:	21 Jun 2024 00:02
Last Modified:	21 Jun 2024 00:02
URI:	http://psaspb.upm.edu.my/id/eprint/1996

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