NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech最新文献

{"title":"Effect of solvent and voltage on anodization of Nb2O5 films","authors":"R. A. Rani, A. Zoolfakar, M. Rusop","doi":"10.1063/1.5124659","DOIUrl":"https://doi.org/10.1063/1.5124659","url":null,"abstract":"This work reports the optimization of chemical anodization process to achieve highly ordered porous structures of niobium oxide (Nb2O5) films. Nb2O5 has been synthesized by anodized niobium foil in fluoride ion based solution. Anodization parameters such as type of solvent and voltage are investigated to determine the conditions for optimal film growth. The structure and morphology of the porous Nb2O5 were characterized using FESEM and XRD techniques.This work reports the optimization of chemical anodization process to achieve highly ordered porous structures of niobium oxide (Nb2O5) films. Nb2O5 has been synthesized by anodized niobium foil in fluoride ion based solution. Anodization parameters such as type of solvent and voltage are investigated to determine the conditions for optimal film growth. The structure and morphology of the porous Nb2O5 were characterized using FESEM and XRD techniques.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"38 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120990461","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":"Synthesis and characterization of metal doped nano zinc oxide on titanium dioxide seeded substrate","authors":"S. Z. Umbaidilah, N. Asib, A. N. Afaah, M. Rusop, Z. Khusaimi","doi":"10.1063/1.5124667","DOIUrl":"https://doi.org/10.1063/1.5124667","url":null,"abstract":"Non-doped ZnO/TiO2 and doped ZnO/TiO2 such as Ag:ZnO/TiO2, Al:ZnO/TiO2, Cu:ZnO/TiO2 and Mg:ZnO/TiO2 nanostructures thin film have been fabricated on glass substrate by using sol-gel spin coating technique for deposition of TiO2 seed layer and solution immersion method for growth of doped ZnO nanostructures. 1 atomic percentage of each metal doped were added in 0.4 M of ZnO solution. The result shows that FESEM images of all samples reveal the morphology as nanorod and doped ZnO/TiO2 samples show a smaller diameter of nanorods sized compared with non- doped ZnO/TiO2 sample. The XRD spectra revealed polycrystalline with a structure belonging to the ZnO hexagonal wurtzite type and the intensity of the (002) peak of Cu doped ZnO/TiO2 has the highest intensity compared to non-doped and the other metal doped samples. The UV-vis absorbance display Ag:ZnO/TiO2 has the highest absorbance and Mg:ZnO/TiO2 indicates the lowest absorbance compared to other sample. Additionally, the UV-vis transmittance spectra show that Ag:ZnO/TiO2 sample are the lowest transparency. Thus, Ag doped ZnO/TiO2 is the best candidates for optical application due to the higher absorbance and the incorporation of Ag into ZnO/TiO2 produce a smaller diameter compared to other samples.Non-doped ZnO/TiO2 and doped ZnO/TiO2 such as Ag:ZnO/TiO2, Al:ZnO/TiO2, Cu:ZnO/TiO2 and Mg:ZnO/TiO2 nanostructures thin film have been fabricated on glass substrate by using sol-gel spin coating technique for deposition of TiO2 seed layer and solution immersion method for growth of doped ZnO nanostructures. 1 atomic percentage of each metal doped were added in 0.4 M of ZnO solution. The result shows that FESEM images of all samples reveal the morphology as nanorod and doped ZnO/TiO2 samples show a smaller diameter of nanorods sized compared with non- doped ZnO/TiO2 sample. The XRD spectra revealed polycrystalline with a structure belonging to the ZnO hexagonal wurtzite type and the intensity of the (002) peak of Cu doped ZnO/TiO2 has the highest intensity compared to non-doped and the other metal doped samples. The UV-vis absorbance display Ag:ZnO/TiO2 has the highest absorbance and Mg:ZnO/TiO2 indicates the lowest absorbance compared to other sample. Additionally, the UV-vis transmittance spectra show th...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"60 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":"125126212","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":"Review: Methods for ripening mango to extend shelf life","authors":"N. Rosman, N. Asli, S. Abdullah, M. Rusop","doi":"10.1063/1.5124648","DOIUrl":"https://doi.org/10.1063/1.5124648","url":null,"abstract":"Most of the research about this topic is the way to delay ripening by modified atmosphere packaging using edible films or by inhibiting ethylene action through the use of 1-methylcyclopropene (1-MCP).Most of the research about this topic is the way to delay ripening by modified atmosphere packaging using edible films or by inhibiting ethylene action through the use of 1-methylcyclopropene (1-MCP).","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"13 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":"122152726","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":"Validation of CW-light penetration based on fat layer variation in human skin model using Monte Carlo method","authors":"A. A. A. Halim, M. H. Laili, M. Rusop","doi":"10.1063/1.5124639","DOIUrl":"https://doi.org/10.1063/1.5124639","url":null,"abstract":"Light propagation inside the tissue multilayers has been an issue because of the variation of thickness subcutaneous fat layer. Monte Carlo simulation was studied since it is as gold standard and consists in computational simulation of that chain and in constructing statistical estimates of the desired functional. Four layers of 3-D was quantitatively investigated the relationship between variation thickness of subcutaneous fat layer and measurement of muscle oxygenation using near infrared spectroscopy. The scattering coefficient, absorption coefficient, refractive index and anisotropy factor of each layer were found in the literature. All parameters could be estimated with having different of absorbance less than (2 a.u) for fat thickness 1 mm and 2 mm of human skin in the visible part of the spectrum at 600nm and 900nm. Thus, this result may help us to prove that our human muscle is transparent to this visible and especially near infrared region and might be useful tool for muscle activation studies in the future.Light propagation inside the tissue multilayers has been an issue because of the variation of thickness subcutaneous fat layer. Monte Carlo simulation was studied since it is as gold standard and consists in computational simulation of that chain and in constructing statistical estimates of the desired functional. Four layers of 3-D was quantitatively investigated the relationship between variation thickness of subcutaneous fat layer and measurement of muscle oxygenation using near infrared spectroscopy. The scattering coefficient, absorption coefficient, refractive index and anisotropy factor of each layer were found in the literature. All parameters could be estimated with having different of absorbance less than (2 a.u) for fat thickness 1 mm and 2 mm of human skin in the visible part of the spectrum at 600nm and 900nm. Thus, this result may help us to prove that our human muscle is transparent to this visible and especially near infrared region and might be useful tool for muscle activation studies in...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"30 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":"123099910","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":"Effects of Nano-kaolin clay on the rutting resistance of asphalt binder","authors":"R. Jaya, Nurulain Che'mat, N. Hassan, N. Mashros, H. Yaacob, M. R. Hainin, M. Satar, Mohamad I. Ali","doi":"10.1063/1.5124653","DOIUrl":"https://doi.org/10.1063/1.5124653","url":null,"abstract":"Nowadays, nanotechnology has been widely study because it’s proven to improve the properties of asphalt. There a lot of nano-materials in industrial area and one of them are Nano clay. Therefore, this study was performed to investigate the rutting resistance of asphalt incorporating Nano-kaolin. The asphalt was evaluated in fresh and aged condition. In this study, asphalt binders with five different percentages of Nano-kaolin (0%, 3%, 5%, 7%, and 9%) contain was prepared. The results indicated that the addition of Nano-kaolin was helpful in enhance the rutting resistance of the binders. In addition, based on the testing results, the ideal asphalt was achieved at 5% of Nano-kaolin content.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"48 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":"122092656","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":"A review on the effect of metal doped ZnO nanostructures on ultraviolet photoconductive sensor performance","authors":"S. Z. Umbaidilah, N. Asib, A. N. Afaah, M. Rusop, Z. Khusaimi","doi":"10.1063/1.5124668","DOIUrl":"https://doi.org/10.1063/1.5124668","url":null,"abstract":"Zinc oxide (ZnO) has been under study since 1935 and it has attracted much attention in the scientific community as future material. From the scientific point of view, ZnO nanostructures are interesting because of their quasi – one dimensional structure with diameters in the range of tens of nanometers to hundreds of nanometers. Current research papers for non-doped and metal doped ZnO focusing on the UV sensor application are reviewed. The purpose of this paper is to investigate the effect of metal doped ZnO to the performance of UV sensor applications. Some of the journals have been referred in order to find out the related study on this topic. It was found that UV sensing performance of doped ZnO improved in term of sensitivity and photoresponse properties compared to non-doped ZnO.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"73 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":"128702934","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":"Investigation on properties of ZnO nanorods grown at different immersion time on TiO2 seed layer","authors":"N. Asib, M. H. Mamat, M. Rusop, Z. Khusaimi","doi":"10.1063/1.5124645","DOIUrl":"https://doi.org/10.1063/1.5124645","url":null,"abstract":"TiO2:ZNR thin films have been fabricated on glass substrates via sol-gel spin-coating technique and solution-immersion method, respectively. Zinc oxide nanorods (ZNR) were grown at low temperature of 90°C for 2,3,4,5 and 6 hours of immersion time on titanium dioxide (TiO2) seed layer-coated substrate. FESEM images showed that the densest distributions of ZNR with smaller diameter size were observed around 3 and 4 h. The diffraction peaks of (0 0 2)-plane were observed for all thin films, indicating nanorods orientation in the c-axis direction as detected in XRD patterns. UV-Vis absorbance spectra recorded that smaller size of ZNR at 3 and 4 h have maximum intensity of UV absorption properties.TiO2:ZNR thin films have been fabricated on glass substrates via sol-gel spin-coating technique and solution-immersion method, respectively. Zinc oxide nanorods (ZNR) were grown at low temperature of 90°C for 2,3,4,5 and 6 hours of immersion time on titanium dioxide (TiO2) seed layer-coated substrate. FESEM images showed that the densest distributions of ZNR with smaller diameter size were observed around 3 and 4 h. The diffraction peaks of (0 0 2)-plane were observed for all thin films, indicating nanorods orientation in the c-axis direction as detected in XRD patterns. UV-Vis absorbance spectra recorded that smaller size of ZNR at 3 and 4 h have maximum intensity of UV absorption properties.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"1 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":"129195301","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":"High sensitivity ultra-violet photosensor based on nanostructured Nb2O5","authors":"R. A. Rani, A. Zoolfakar, A. S. Ismail, Siti Shafura A Karim, M. H. Mamat, M. Rusop","doi":"10.1063/1.5124661","DOIUrl":"https://doi.org/10.1063/1.5124661","url":null,"abstract":"This work reports the characterization of UV sensor based on nanomoss Nb2O5 films. Nb2O5 has been synthesized by hydrothermal etching reaction of niobium foil in fluoride ion based solution. The morphological and structural of nanomoss Nb2O5 are investigated using FESEM and XRD techniques to determine the properties of the film. From UV characterization, the UV sensor has exhibited good photosensitivity of 2.0 when exposed under turn on/off of UV light.This work reports the characterization of UV sensor based on nanomoss Nb2O5 films. Nb2O5 has been synthesized by hydrothermal etching reaction of niobium foil in fluoride ion based solution. The morphological and structural of nanomoss Nb2O5 are investigated using FESEM and XRD techniques to determine the properties of the film. From UV characterization, the UV sensor has exhibited good photosensitivity of 2.0 when exposed under turn on/off of UV light.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"24 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":"131755722","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 buffer layer on the properties of organic solar cells","authors":"T. Soga, Kenta Syuji, S. Kato, S. Kato, N. Kishi","doi":"10.1063/1.5124669","DOIUrl":"https://doi.org/10.1063/1.5124669","url":null,"abstract":"TiOx has been widely used as buffer layer to improve the efficiency and stability of organic solar cell. This paper presents the effect of polyethylene glycol on the properties of organic solar cells, comparing with those using TiOx buffer layer. The power conversion efficiency of P3HT:PCBM solar cell was improved by using TiOx buffer layer, and futher improved by using PEG buffer layer. The stability of solar cell was also improved by using buffer layer, but the degradation behavior was different by the buffer layer used.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"176 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":"124337520","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":"Nanoparticle optical properties: Effect of separation distance on near field and far field of a pair of gold spherical nanoparticles","authors":"Shafiqa Abdul Rahim, A. Aziz","doi":"10.1063/1.5124666","DOIUrl":"https://doi.org/10.1063/1.5124666","url":null,"abstract":"In this present work, taking full advantage of MNPBEM toolbox, the optical properties of gold dimers have been simulated with an emphasis on the extinction spectra. The plasmon resonance wavelength of coupled gold nanospheres as a function of interparticle distance has been studied by varying the surface-to-surface distance from 100 nm to 500 nm. Two distinct regimes are determined namely near-field and far-field, which depend on the distance between the gold dimers and also on the orientation of the nanoparticle pair with respect to the polarization axis of the incident light. When the incident light is polarized along the dimer axis, the wavelength corresponding to the maximum extinction first blueshifts with increasing gap, and then red-shifts as the particle separation are further increased. However, for the perpendicularly polarized excitation, the increase in the separation distance leads to non-monotonic shift in the plasmon resonance wavelength. From this observation, it reveals that the far-field interaction as well as the retardation effect for large particles cannot be ignored as it leads to the damping of the plasmon oscillation, with more obvious effect being associated with perpendicular polarization.In this present work, taking full advantage of MNPBEM toolbox, the optical properties of gold dimers have been simulated with an emphasis on the extinction spectra. The plasmon resonance wavelength of coupled gold nanospheres as a function of interparticle distance has been studied by varying the surface-to-surface distance from 100 nm to 500 nm. Two distinct regimes are determined namely near-field and far-field, which depend on the distance between the gold dimers and also on the orientation of the nanoparticle pair with respect to the polarization axis of the incident light. When the incident light is polarized along the dimer axis, the wavelength corresponding to the maximum extinction first blueshifts with increasing gap, and then red-shifts as the particle separation are further increased. However, for the perpendicularly polarized excitation, the increase in the separation distance leads to non-monotonic shift in the plasmon resonance wavelength. From this observation, it reveals that the far-field...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"14 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":"121488195","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}