NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech最新文献

{"title":"Structural and electrical properties of ZnO and SiO2 doped ZnO powder for varistor application","authors":"R. Mohamed, N. Osman, N. Yahya, M. H. Mamat, M. F. Malek, A. S. Ismail, M. Yusoff, Z. Khusaimi, M. Rusop","doi":"10.1063/1.5124662","DOIUrl":"https://doi.org/10.1063/1.5124662","url":null,"abstract":"Pure zinc oxide (ZnO) and silica (SiO2) doped ZnO nanopowders have been prepared using solid state method. SiO2 were doped into ZnO at different weight percentage 1 and 3 wt.%. The structural and electrical properties of ZnO and SiO2 doped ZnO powder have been characterized using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and electro source meter. From the results, the XRD pattern were compatible with ZnO phase structure. Based on the SEM images, the grain size of ZnO varistor is increased when doped with SiO2. The obtained value of nonlinear coefficient (α) of undoped ZnO sample is low compared to SiO2 doped ZnO varistor. The, α value is increased as the content of SiO2 doped increases. The maximum value of α is at 3 wt.% of SiO2 doped ZnO which is 1.734 that might be can enhanced the performance of varistor. Thus, the properties of ZnO varistor can be improved when doped with SiO2.Pure zinc oxide (ZnO) and silica (SiO2) doped ZnO nanopowders have been prepared using solid state method. SiO2 were doped into ZnO at different weight percentage 1 and 3 wt.%. The structural and electrical properties of ZnO and SiO2 doped ZnO powder have been characterized using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and electro source meter. From the results, the XRD pattern were compatible with ZnO phase structure. Based on the SEM images, the grain size of ZnO varistor is increased when doped with SiO2. The obtained value of nonlinear coefficient (α) of undoped ZnO sample is low compared to SiO2 doped ZnO varistor. The, α value is increased as the content of SiO2 doped increases. The maximum value of α is at 3 wt.% of SiO2 doped ZnO which is 1.734 that might be can enhanced the performance of varistor. Thus, the properties of ZnO varistor can be improved when doped with SiO2.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123463844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural properties of anodic titanium dioxide (TiO2) nanotubes film via electrochemical anodization","authors":"N. Azhar, S. S. Shariffudin, R. A. Rani, S. Munirah, S. Nagaoka, M. Rusop","doi":"10.1063/1.5124644","DOIUrl":"https://doi.org/10.1063/1.5124644","url":null,"abstract":"Light emitting diode (LED) is solid state lighting uses semiconductor material and convert the electrical energy to light energy. Titanium dioxide (TiO2) was used in optoelectronic devices because it is good purity and easily synthesizing onto thin film. TiO2 nanotubes was prepared by electrochemical anodization method at room temperature. The TiO2 nanotubes was investigated amorphous and annealed sample at 450°C. The surface morphology revealed that sample annealed at 450°C showed uniformity with a regular porous on top layer of TiO2. Raman pattern showed the amorphous-to-crystalline anodic TiO2 sample transition with anodization. Optical properties showed the TiO2 nanotubes annealed at 450°C has not sharp absorbance edge and it is relates to the oxygen deficiency in nanotube material. The TiO2 nanotubes film annealed at 450°C has potential apply to LED devices.Light emitting diode (LED) is solid state lighting uses semiconductor material and convert the electrical energy to light energy. Titanium dioxide (TiO2) was used in optoelectronic devices because it is good purity and easily synthesizing onto thin film. TiO2 nanotubes was prepared by electrochemical anodization method at room temperature. The TiO2 nanotubes was investigated amorphous and annealed sample at 450°C. The surface morphology revealed that sample annealed at 450°C showed uniformity with a regular porous on top layer of TiO2. Raman pattern showed the amorphous-to-crystalline anodic TiO2 sample transition with anodization. Optical properties showed the TiO2 nanotubes annealed at 450°C has not sharp absorbance edge and it is relates to the oxygen deficiency in nanotube material. The TiO2 nanotubes film annealed at 450°C has potential apply to LED devices.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130899904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of SnO2 coating to the properties of ZnO nanorod array","authors":"A. S. Ismail, M. H. Mamat, M. F. Malek, M. A. Abdullah, W. Ahmad, M. Yusoff, R. Mohamed, N. Sin, A. Suriani, M. Rusop","doi":"10.1063/1.5124635","DOIUrl":"https://doi.org/10.1063/1.5124635","url":null,"abstract":"Tin oxide coated zinc oxide nanorod arrays (SnO2/ZnO) were prepared using two step sol-gel processes in which the ZnO nanorod arrays were initially grown on ZnO seed layer coated glass substrate. Then, a thin layer of SnO2 is coated on the nanorod arrays using spin coating method. The structural and optical properties of the films were investigated using FESEM, XRD and UV-vis, respectively. The surface morphology of the films showed that the nanorod arrays are covered by rough layer of SnO2. The average diameter of ZnO nanorods is about 80 nm. The XRD plot indicates that the film consist of hexagonal wurtzite ZnO and rutile SnO2 structure. Besides, the addition of SnO2 layer leads to diffraction angle shifting at (002) plane orientation. The optical properties of films displayed that the SnO2/ZnO induced lower transmittance film at visible region than that of bare ZnO nanorod arrays. Besides, the SnO2/ZnO film exhibited high optical band gap energy of 3.35 eV.Tin oxide coated zinc oxide nanorod arrays (SnO2/ZnO) were prepared using two step sol-gel processes in which the ZnO nanorod arrays were initially grown on ZnO seed layer coated glass substrate. Then, a thin layer of SnO2 is coated on the nanorod arrays using spin coating method. The structural and optical properties of the films were investigated using FESEM, XRD and UV-vis, respectively. The surface morphology of the films showed that the nanorod arrays are covered by rough layer of SnO2. The average diameter of ZnO nanorods is about 80 nm. The XRD plot indicates that the film consist of hexagonal wurtzite ZnO and rutile SnO2 structure. Besides, the addition of SnO2 layer leads to diffraction angle shifting at (002) plane orientation. The optical properties of films displayed that the SnO2/ZnO induced lower transmittance film at visible region than that of bare ZnO nanorod arrays. Besides, the SnO2/ZnO film exhibited high optical band gap energy of 3.35 eV.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133787349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of different stabilizers to the growth of ZnO nanostructures on TiO2 seed layer","authors":"N. Asib, K. A. Juhaizat, M. H. Mamat, M. Rusop, Z. Khusaimi","doi":"10.1063/1.5124646","DOIUrl":"https://doi.org/10.1063/1.5124646","url":null,"abstract":"In this work, zinc oxide (ZnO) nanostructures prepared by immersion method with zinc nitrate hexahydrate (Zn(NO3)2.6H2O) as a precursor were successfully grown on TiO2 seed layer with three different stabilizers i.e. hexamethylenetetramine, C6H12N4 (HMTA), urea (CH4N2O) and sodium hydroxide (NaOH). The effect of various stabilizers on the size particles, surface morphologies and element composition in grown ZnO were investigated by using ZETA nanoparticle sizer, FESEM and EDX. Size particles of ZnO solutions after immersion method was observed and the smallest particles sizes were recorded for HMTA. FESEM images showed that ZnO nanorods, nanoflowers and grain-like structures were formed when using HMTA, urea and NaOH as stabilizer. The presence of ZnO and TiO2 were confirmed by EDX analysis by showing that all samples that used stabilizer have highest weight % of Zn element.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122585845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Al-doped ZnO nanorod array using different type and thickness of metal contact","authors":"A. S. Ismail, M. H. Mamat, M. F. Malek, M. A. Abdullah, W. Ahmad, M. Yusoff, R. Mohamed, N. Sin, A. Suriani, M. Rusop","doi":"10.1063/1.5124636","DOIUrl":"https://doi.org/10.1063/1.5124636","url":null,"abstract":"Al-doped ZnO nanorod arrays were synthesized on seed layer coated glass substrate using immersion method. Optimization on the metal contact was conducted whereby the effect different types and thicknesses of metal contacts to the electrical properties of the nanorod array films were investigated. For the optimization of metal contact types, platinum (Pt) displayed the best electrical properties with low resistance film. For the optimization of contact thickness, Pt was selected and the characterization showed that Pt with 90 nm has the best electrical properties with the lowest film resistance of 0.24 MΩ. The structural properties of the film were characterized using FESEM and XRD to confirm the availability of ZnO nanorod arrays. The electrical properties of the films at different contact thicknesses were investigated using I-V measurement. Based on the measurement, it is observed that 90 nm contact thickness produce the lowest resistance film.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128112851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Organizing Committee Acknowledgment: Nanoscience and Nanotechnology","authors":"M. Rusop, SogaTetsuo, NagaokaShiro, JafarSalifairus Mohammad","doi":"10.1063/1.5124630","DOIUrl":"https://doi.org/10.1063/1.5124630","url":null,"abstract":"","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"274 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124429775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graphene synthesis via double thermal chemical vapor deposition on Ni substrate by different cycles of refined cooking palm oil","authors":"M. Robaiah, M. J. Salifairus, Z. Khusaimi, H. Azhan, S. Abdullah, M. Rusop, N. Asli","doi":"10.1063/1.5124655","DOIUrl":"https://doi.org/10.1063/1.5124655","url":null,"abstract":"Graphene successfully formed on the Ni surface due to segregation and precipitation of high amount of carbon originated from the source material occurred at cooling process. The growth of graphene at different cycles of refined cooking palm oil using double thermal chemical vapour deposition method (DTCVD) was investigated. The samples were prepared at different cycles of refined cooking palm oil, which is unused (refined), first cycle, second cycles and third cycles at vaporization temperature of 350 °C and the temperature of Ni substrate constant at 900 °C. Comparison of the Fesem results indicated that the difference of cycles refined cooking palm oil has significant structural changes. Third cycles of refined cooking palm oil as precursor shown the graphene grain seems to growth perfectly compared to other samples. It might be attributed to the segregation of carbon onto the Ni (111) surface, whereas the graphene growth seems to be influenced by the rate of the carbon atom generation. It was found that the increment of carbon contributed to the high carbon content in cycles of refined cooking palm oil. Raman results reveal that the sample synthesis using third cycles refined cooking palm oil is weak D-peak, which indicates the low contribution of a defect structure. These reactions potentially decrease the layer stacking of graphene sheets according to the low value of defect and the higher ratio of I2D/IG = 0.3 respect to other samples.Graphene successfully formed on the Ni surface due to segregation and precipitation of high amount of carbon originated from the source material occurred at cooling process. The growth of graphene at different cycles of refined cooking palm oil using double thermal chemical vapour deposition method (DTCVD) was investigated. The samples were prepared at different cycles of refined cooking palm oil, which is unused (refined), first cycle, second cycles and third cycles at vaporization temperature of 350 °C and the temperature of Ni substrate constant at 900 °C. Comparison of the Fesem results indicated that the difference of cycles refined cooking palm oil has significant structural changes. Third cycles of refined cooking palm oil as precursor shown the graphene grain seems to growth perfectly compared to other samples. It might be attributed to the segregation of carbon onto the Ni (111) surface, whereas the graphene growth seems to be influenced by the rate of the carbon atom generation. It was found tha...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127154095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigate of lateral interactions between ammonia molecules adsorbed on a V3C2 MXenes sheet of DFT study and statistical physics","authors":"P. Stishenko, T. Kayumova","doi":"10.1063/1.5122041","DOIUrl":"https://doi.org/10.1063/1.5122041","url":null,"abstract":"In this paper, we investigated the lateral interactions of ammonia molecules on the V3C2 surface using the methods of the density functional theory. The calculations were carried out using non-local functionals. We investigated the properties of the adsorption layer MXenes V3C2 methods of statistical physics. The adsorption isotherms were constructed using the SuSMoST program code. They made recalculation of adsorption isotherms from chemical potential to pressure.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128427585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of the calculation method and designing of a vortex jet device for gas flow regulation purposes","authors":"A. Uss, A. Chernyshev, N. Atamasov","doi":"10.1063/1.5122078","DOIUrl":"https://doi.org/10.1063/1.5122078","url":null,"abstract":"Based on the analysis performed and a preliminary numerical calculation of the gas flow in the regulator working cavity, a new design of vortex gas pressure regulator was developed. Using the additive technologies, an experimental model of the device was manufactured. Based on the developed test bench for testing the vortex regulator, a number of experiments were performed. The results of experimental studies confirmed feasibility of the design. Computational studies were performed and the new design was developed of vortex regulator with distributed supply of the control flow of the working fluid and vortex control of supply and control flow of the working fluid.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127917917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engine oil characteristics changes in uprated diesels","authors":"A. Denisov, A. Grebennikov, S. Grebennikov, A. O. Nosov","doi":"10.1063/1.5122024","DOIUrl":"https://doi.org/10.1063/1.5122024","url":null,"abstract":"The problems of estimating the periodicity of engine oil replacement in high-powered internal combustion engines during operation, which operate with increased thermal stress and oil consumption on the \"fumes\" are identified. On the basis of the laws of chemical kinetics theoretically investigated and experimentally confirmed the mechanism of aging and changes in the concentration of motor oil additives. The step-by-step adjustment of the periodicity of engine oil change depending on the operating time of high-powered KAMAZ engines is justified.The problems of estimating the periodicity of engine oil replacement in high-powered internal combustion engines during operation, which operate with increased thermal stress and oil consumption on the \"fumes\" are identified. On the basis of the laws of chemical kinetics theoretically investigated and experimentally confirmed the mechanism of aging and changes in the concentration of motor oil additives. The step-by-step adjustment of the periodicity of engine oil change depending on the operating time of high-powered KAMAZ engines is justified.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126659967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}