Publication:
Thickness Dependent Nanostructural, Morphological, Optical And Impedometric Analyses Of Zinc Oxide-gold Hybrids: Nanoparticle To Thin Film

Simple item page
dc.contributor.authorVeeradasan Perumalen_US
dc.contributor.authorUda Hashimen_US
dc.contributor.authorSubash C.B. Gopinathen_US
dc.contributor.authorR. Haarindraprasaden_US
dc.contributor.authorWei-Wen Liuen_US
dc.contributor.authorP. Poopalanen_US
dc.contributor.authorS. R. Balakrishnanen_US
dc.contributor.authorV. Thivinaen_US
dc.contributor.authorA. R. Ruslindaen_US
dc.date.accessioned2024-05-27T14:48:34Z
dc.date.available2024-05-27T14:48:34Z
dc.date.issued2015
dc.description.abstractThe creation of an appropriate thin film is important for the development of novel sensing surfaces, which will ultimately enhance the properties and output of high-performance sensors. In this study, we have fabricated and characterized zinc oxide (ZnO) thin films on silicon substrates, which were hybridized with gold nanoparticles (AuNPs) to obtain ZnO-Aux (x = 10, 20, 30, 40 and 50 nm) hybrid structures with different thicknesses. Nanoscale imaging by field emission scanning electron microscopy revealed increasing film uniformity and coverage with the Au deposition thickness. Transmission electron microscopy analysis indicated that the AuNPs exhibit an increasing average diameter (5-10 nm). The face center cubic Au were found to co-exist with wurtzite ZnO nanostructure. Atomic force microscopy observations revealed that as the Au content increased, the overall crystallite size increased, which was supported by X-ray diffraction measurements. The structural characterizations indicated that the Au on the ZnO crystal lattice exists without any impurities in a preferred orientation (002). When the ZnO thickness increased from 10 to 40 nm, transmittance and an optical bandgap value decreased. Interestingly, with 50 nm thickness, the band gap value was increased, which might be due to the Burstein-Moss effect. Photoluminescence studies revealed that the overall structural defect (green emission) improved significantly as the Au deposition increased. The impedance measurements shows a decreasing value of impedance arc with increasing Au thicknesses (0 to 40 nm). In contrast, the 50 nm AuNP impedance arc shows an increased value compared to lower sputtering thicknesses, which indicated the presence of larger sized AuNPs that form a continuous film, and its ohmic characteristics changed to rectifying characteristics. This improved hybrid thin film (ZnO/Au) is suitable for a wide range of sensing applications.en_US
dc.identifier.doi10.1371/journal.pone.0144964
dc.identifier.epage24
dc.identifier.issn1932-6203
dc.identifier.issue12
dc.identifier.spage1
dc.identifier.urihttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0144964
dc.identifier.urihttps://oarep.usim.edu.my/handle/123456789/3802
dc.identifier.volume10
dc.language.isoen_USen_US
dc.publisherPublic Library of Scienceen_US
dc.relation.ispartofPloS oneen_US
dc.titleThickness Dependent Nanostructural, Morphological, Optical And Impedometric Analyses Of Zinc Oxide-gold Hybrids: Nanoparticle To Thin Filmen_US
dc.typeArticleen_US
dspace.entity.typePublication

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Thickness Dependent Nanostructural, Morphological, Optical And Impedometric Analyses Of Zinc Oxide-gold Hybrids.pdf
Size:
4.82 MB
Format:
Adobe Portable Document Format
Download

Collections

Other Publications