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  • 1
    Online Resource
    Online Resource
    Electron and Ion Densities Measurement in Reactive Magnetron Zinc Sputtering Plasma
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 832 ( 2013-11), p. 344-349
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 832 ( 2013-11), p. 344-349
    Abstract: Abstract. Investigation on the plasma properties is an essential fundamental works in order to precisely control the growth of nanoscale thin film. In the present work, we produced and study the reactive magnetron sputtering plasma in Ar+O 2 ambient using a solid Zn target as sputter source. We evaluate the electron temperature, electron density and ion density using Langmuir probe measurement as a function of O 2 flow rate and working pressure. We found that the electron temperature increased spontaneously with the oxygen flow rate. The electron temperature was almost doubled when O 2 flow rate increased from 0 sccm to 10 sccm. The electron and ion densities increased with the oxygen flow rate between 0 sccm and 5 sccm. However, after 5 sccm of O 2 flow rate which is approximately 11% of O 2 /(O 2 +Ar) flow rate ratio the electron density decreased drastically. This is due to the electron attachment and the production of negative ion species in Ar+O 2 plasma environment. In addition, we found that the ion flux increase monotonically with the O 2 flow rate thus will increase the ion bombardment effect on the deposited thin film and eventually damage the thin film. Our experimental results suggest that the O 2 flow rate and the working pressure would have a significant influence on ion bombardment effect on deposited thin film.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.832
    DOI: 10.4028/www.scientific.net/AMR.832.344
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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  • 2
    Online Resource
    Online Resource
    Fabrication of ZnO Nanostructures Doped with Nb at Different Concentration as a Argon Sensor
    Akademia Baru Publishing ; 2023
    In:  Journal of Advanced Research in Applied Sciences and Engineering Technology Vol. 31, No. 1 ( 2023-06-13), p. 365-372
    Details
    In: Journal of Advanced Research in Applied Sciences and Engineering Technology, Akademia Baru Publishing, Vol. 31, No. 1 ( 2023-06-13), p. 365-372
    Abstract: This works presents the report on the study of ZnO nanoparticles doped on silicon substrate. ZnO nanoparticles doped was prepared by using thermal immersion method with varies percentage ratio mass of dopant, Niobium. ZnO nanoparticles was characterized for their morphology by using field emission scanning electron microscopy (FESEM), crystalline graphic of material by x-ray diffraction (XRD) and electrical properties by IV measurement. The FESEM results showed that the randomly rougher distribution of ZnO nanoparticles doped with Nb covering on Si surface. XRD results reveals that ZnO nanoparticles doped with Nb was successfully growth on the silicon substrate. IV measurement was measured by 2-point probes. The measurement of the IV was done before and after sample exposed into argon gas. The argon gas was exposed for 10 minutes to indicate the sensitivity of the sample. The result shows that the sample that doped with 10wt% of niobium was the best sample to indicate the performance of the sensor compare to the other sample as observed in the 88.40% response when exposed to Argon gas.
    Type of Medium: Online Resource
    ISSN: 2462-1943
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.37934/araset.31.1
    DOI: 10.37934/araset
    DOI: 10.37934/araset.31.1.365372
    Language: Unknown
    Publisher: Akademia Baru Publishing
    Publication Date: 2023
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  • 3
    Online Resource
    Online Resource
    Biosynthesis of SnO 2 nanoparticles by aqueous leaves extract of Aquilaria malaccensis (agarwood)
    IOP Publishing ; 2021
    In:  IOP Conference Series: Materials Science and Engineering Vol. 1092, No. 1 ( 2021-03-01), p. 012070-
    Details
    In: IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 1092, No. 1 ( 2021-03-01), p. 012070-
    Abstract: Biosynthesis of tin oxide nanoparticles (SnO 2 NPs) was cost-effectively carried out in non-toxic aqueous mixture of Aquilaria malaccensis (agarwood) leaves extract and tin (IV) chloride pentahydrate solution at room temperature. The synthesized SnO 2 NPs were characterized by using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDX) and UV-visible diffuse reflectance spectroscopy (DRS). The results from FT-IR spectra of A. malaccensis leaves shows the presence of functional groups of polyphenolic from bioactive compounds which act as the template for reducing and capping agents during the synthesis activity. The structural properties of the obtained nanoparticles are studied using X-ray diffraction, which indicates that the crystallite size are 6.3 and 3.4 nm for sample synthesized from extract of fresh and old leaves respectively. The morphology of the nanoparticles shows uniform distribution of agglomerated spherical nanoparticles. DRS absorption spectrum indicates the band-gap for both samples 3.23 and 3.35 eV respectively. The green synthesized SnO 2 NPs is suggested may play forthcoming significant roles in catalysis and optoelectronic devices.
    Type of Medium: Online Resource
    ISSN: 1757-8981 , 1757-899X
    URL: Article
    DOI: 10.1088/1757-899X/1092/1/012070
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2506501-4
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  • 4
    Online Resource
    Online Resource
    Structural and Thermal Behaviors of Iron-Filled Align Carbon Nanotubes Formulated by Two-Stage Catalytic Chemical Vapor Deposition
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 364 ( 2011-10), p. 191-195
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 364 ( 2011-10), p. 191-195
    Abstract: Finding on the one-dimensional purified aligned carbon nanotubes (ACNT) was prepared using botanical hydrocarbon: camphor powder in a two-stage catalytic chemical vapor deposition will be presented. For the first time, the hydrocarbon source and catalyst were patterned in different alumina boats in the system. The growth of ACNT has achieved free standing formation with higher aspect ratio. In contrast, unpurified carbon nanotubes have some drawbacks and require some treatments to fully utilize their capabilities in various applications. The results reveal that the crystallinity and purity of functionalized align carbon nanotubes was increased after wet-chemical technique and heat treatment process. In this paper, the results provide evidence showing that it was in good agreement with the field emission scanning electron microscopy, micro-Raman and thermogravimetric analysis.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.364
    DOI: 10.4028/www.scientific.net/AMR.364.191
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
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  • 5
    Online Resource
    Online Resource
    Effect of the Precursor Solution Concentration of CuI Thin Film Deposited by Spin Coating Method
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 364 ( 2011-10), p. 417-421
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 364 ( 2011-10), p. 417-421
    Abstract: In this research, the effect of precursor concentration of CuI thin film deposited by spin coating method was studied. The wide band gap p-type semiconductor CuI thin film was prepared by mixing the CuI powder with 50 ml of acetonitrile as a solvent. The CuI concentration varies from 0.05M to 0.5M. The speed for spin coating is 1000 rpm for 60 seconds. After the deposition the CuI thin films were annealed at 150°C. The result shows the CuI thin film properties strongly depends on its precursor concentration. Thickness between 33.65 nm - 441.25 nm was obtained as the concentration increased. The increment of thickness affected the electrical property with resistivity of about 10 -6 Ω.cm and 10 1 Ω.cm was observed for all the CuI thin films. For optical properties, the transmittance decreased with high concentration as high amount of CuI particle were observed in the thin films. From the transmittance, the absorption coefficient of 10 -6 m -1 and optical band gap of 3.10 and 3.50 eV for all the films were observed using Tauc’s plot.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.364
    DOI: 10.4028/www.scientific.net/AMR.364.417
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
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  • 6
    Online Resource
    Online Resource
    Optical and Structural Properties of MEH-PPV: ZnO Nanocomposites
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 364 ( 2011-10), p. 124-128
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 364 ( 2011-10), p. 124-128
    Abstract: Thin films of conducting unsaturated polymer of red color poly [2-methoxy-5(2’-ethyl hexyloxy)-phenylene vinylene] (MEH-PPV) containing different weight percent of ZnO nanoparticles were deposited by spin coating techniques. The MEH-PPV: ZnO solutions were spin coated onto 2 × 2 cm glass substrates. The spun MEH-PPV: ZnO thin films were used for investigating the optical properties by using Ultraviolet-Visible Spectrometer (UV-Vis). The structural properties of the thin films were investigated by Scanning Electron Microscopy (SEM). For MEH-PPV: ZnO nanocomposites, the UV-Vis absorption bands increases and showing slight blue shift compared to the pure MEH-PPV. The optical bandgap of MEH-PPV: ZnO nanocomposites slightly decrease when the amount of ZnO nanoparticles increase. ZnO nanoparticles apparently no effect on conjugation segments of MEH-PPV. From the SEM images of MEH-PPV: ZnO nanocomposites, it can be seen that ZnO nanoparticles form agglomerated regions.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.364
    DOI: 10.4028/www.scientific.net/AMR.364.124
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
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  • 7
    Online Resource
    Online Resource
    Effect of Post-Deposition Annealing Process on the Resistive Switching Behaviour of TiO〈sub〉2〈/sub〉 Thin Films by Sol-Gel Method
    Trans Tech Publications, Ltd. ; 2014
    In:  Advanced Materials Research Vol. 925 ( 2014-4), p. 125-129
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 925 ( 2014-4), p. 125-129
    Abstract: The paper presents the memristive behaviour of spin-coated titania thin films on ITO substrate. The sample was annealed in air ambient at different annealing temperature and duration of 250 and 450 °C for 20 and 60 min. The effect of post-annealing process to the physical thickness and crystallinity of the films towards switching behaviour was studied. It was found that the thickness and crystallinity of the films increases as the post annealing process increases. Sample annealed at 250 °C for 20 min with thinner film showed better switching behaviour even though the sample is still in amorphous form. Thus, in our work, we believed that the crystallinity of the films does not affect the switching behaviour of the sample. The reliability of device performance was studied by repeating the measurement for three times.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.925
    DOI: 10.4028/www.scientific.net/AMR.925.125
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
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  • 8
    Online Resource
    Online Resource
    Role of Thickness towards the Optical and Electrical Properties of Photoactive Layer MEH-PPV: TiO〈sub〉2〈/sub〉 Nanocomposite Thin Films
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 832 ( 2013-11), p. 404-409
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 832 ( 2013-11), p. 404-409
    Abstract: In recent years, the research on organic solar cells systems based on nanocomposite containing conjugated polymers has lead to great attention with the aim or replacing conventional inorganic solar cells. This nanocomposite can be processed at lower cost, low weight and ease of synthesis with greater versatility than todays solar cell. In this study, we investigated the dependence of physical, optical and electrical properties on the thickness of MEH-PPV: TiO 2 nanocomposite thin films for organic solar cell application. It was found the optical properties of photo-active layer MEH-PPV: TiO 2 nanocomposite thin films improved with increasing its thickness however the electrical properties decreased. The absorption coefficients of photoactive layer are high in the visible region (400-600 nm) with optimum absorption region at 500 nm. The shift of absorption edge toward longer wavelength with increased of nanocomposite photoactive layer thickness due to narrowing band gap caused by the effects of electron-electron and electron-impurity scattering. In addition the study of illuminated current-voltage (I-V) characteristics revealed the increment of recombination process with increased of photoactive layer thicknesses. It was found such increased in resistivity from 136x10 3 to 1600x10 3 Ω.cm is closely related to the electric field and exciton dissociation which is decreased with increased photoactive thickness.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.832
    DOI: 10.4028/www.scientific.net/AMR.832.404
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
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  • 9
    Online Resource
    Online Resource
    Optical Band Gap Decrement of Nanocomposited MEH-PPV:CNTs Thin Film for Organic Solar Cells
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 667 ( 2013-3), p. 260-264
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 667 ( 2013-3), p. 260-264
    Abstract: This work focus on optical band gap of nanocomposited MEH-PPV:CNTs thin film. In this research we investigate the behavior of optical band gap when the composition of CNTs powder is increased which directly influence the thickness of the thin film. The experimental process entailed for the black powder of CNTs to be first annealed at 450 °C before mixing it with the polymer solution to ensure that the impurities in the CNTs are all removed. The 20 mg MEH-PPV polymer was dissolved in an aromatic solvent which is toluene with a concentration of 1:1. The composite materials were prepared by adding appropriate amounts of CNTs powder (1, 2, 3 and 4 wt%) into the polymer solution to make various ratios of CNTs powder/polymer composites. The optical properties of the thin film were analyzed by using Perkin Elmer Lambda 750 UV/Vis Spectrometer. Thickness of the thin film is measured using Surface profiler Veeco Dektak 150. In this paper, the optical band gap energy is derived by assuming a direct transition of electron between the edge of the valence band and the conduction band. Our results demonstrates that as the thickness decrease from 62, 60, 59, 58 and 57 nm, the optical band gap showed slight decrement from 2.07, 2.07, 2.05, 2.01 and 2.00 eV for respectively.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.667
    DOI: 10.4028/www.scientific.net/AMR.667.260
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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  • 10
    Online Resource
    Online Resource
    Raman and Electrical Analysis of Iodine-Doped Amorphous Carbon Thin Films
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 667 ( 2013-3), p. 281-286
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 667 ( 2013-3), p. 281-286
    Abstract: Iodine doped amorphous carbon (a-C: I) thin films were prepared by using Thermal Chemical Vapor Deposition (CVD) with deposition temperature ranging from 5000C to 7000C. The physical and electrical properties of deposited a-C:I thin films were characterized by Raman spectroscope and Solar Simulator system. The presence of 2 peaks known as Raman D peaks and Raman G peaks ensure the amorphous structure of carbon (C). As deposition temperature increase, the ID/IG ratio shows difference value, which indicates the effects of the temperature towards the a-C: I structures. An ohmic graph was obtained for the IV measurement, and the conductivity varies from 10-4 to 101 Scm-1. The photoresponse was also determined for all samples. As a reference, an undoped a-C thin film was prepared to differentiate the characteristic between a-C and a-C: I.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.667
    DOI: 10.4028/www.scientific.net/AMR.667.281
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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