Investigation of acemannan thin film as active layer for the application of flexible resistive random access memory
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Date
2019-07
Authors
Loo xuyan
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Abstract
Electronic-waste (e-waste) is an issue that can pose a threat to the environment and human health. This is because e-waste is not easily to decompose within short term period and it often contains toxic materials such as lead, mercury, beryllium and polyvinyl chloride. Previous research had proved the potential of Aloepolysaccharides thin film as active layer in resistive random access memory (Rodríguez-González et al.). Acemannan is the major component in the parenchyma cell of Aloe vera. It is the polysaccharide formed through the linking of mannose (C6H12O6) by β-(1, 4)-glycosidic bonds. Therefore, this research was focused on depositing Acemannan thin film on top of flexible substrate. In this research, Acemannan thin film was deposited via the drop-casting method on top of ITO/PET substrate. Acemannan powder was mixed with deionized water to form Acemannan solution. Then, the effect of Acemannan solution of different concentration (1 mg/mL, 3 mg/mL, 5 mg/mL, 7 mg/mL) and the effect of different drying temperatures (150 oC, 160 oC, 170 oC and 180 oC) on the optical properties and thickness of Acemannan thin film were investigated. There were several characterization techniques used to examine the characteristics of Acemannan thin film in term of its chemical, physical and structural properties. While, Acemannan thin film was fabricated by mixing Acemannan powder with deionized water to form precursor solution, then dropcasting 300 μL the solution on top of the Indium tin oxide (ITO)-coated PET substrate. After that, the sample was dried in oven for 8 hours to form Acemannan thin film. It was discovered that the homogeneity of Acemannan thin films increased as the concentration of Acemannan solutions increased. The same goes to the surface roughness of Acemannan thin films, where the surface roughness of Acemannan thin films decreased as the concentration of Acemannan solutions increased. The thickness of Acemannan thin films decreased as well when the concentration of Acemannan solutions increased. By drying temperature, the thickness of Acemannan thin films at 160 oC was the thinnest of all.