Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190334
N. Permyakova, T. Zheltonozhskaya, L. Kunitskaya, T. Beregova, O. Klimchyk
The self-assembly of asymmetric di- and triblock block copolymers based on chemically complementary poly(acrylic acid) and (methoxy)poly(ethylene oxide) or polyacrilamide blocks into micelle structures are developed in acidic aqueous solutions by hydrophobic interactions between non-polar bound segments of the copolymer blocks. Peculiarities of the micellization processes, morphology, size and stability of the developed micellar nanocarries were highlighted. It was revealed that the wide spectrum of morphological forms of such micellar carriers, such as “crew-cut” micelles, “hairy-type” micelles, “flower-like” and needle-like micelles, could be produced by variation of the absolute and relative length of both the blocks. The presence of complex “core”, which stabilized through hydrogen bonds and hydrophobic interactions, give an opportunity of such micelles to show a high binding capability with respect to toxic and hydrophobic drugs. The application of represented micelle-type polymeric nanocontainers for encapsulation and delivery in living organisms of anticancer drugs eumelanin and doxorubicin was shown. The essential influence of a state of micellar systems, parameters of micellization process, sizes and morphology of micelles, nature and length of micellar “coronas” on drug connection was considered and disscused.
{"title":"Assymetric block copolymers comprising interacting blocks for drug delivery","authors":"N. Permyakova, T. Zheltonozhskaya, L. Kunitskaya, T. Beregova, O. Klimchyk","doi":"10.1109/NAP.2017.8190334","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190334","url":null,"abstract":"The self-assembly of asymmetric di- and triblock block copolymers based on chemically complementary poly(acrylic acid) and (methoxy)poly(ethylene oxide) or polyacrilamide blocks into micelle structures are developed in acidic aqueous solutions by hydrophobic interactions between non-polar bound segments of the copolymer blocks. Peculiarities of the micellization processes, morphology, size and stability of the developed micellar nanocarries were highlighted. It was revealed that the wide spectrum of morphological forms of such micellar carriers, such as “crew-cut” micelles, “hairy-type” micelles, “flower-like” and needle-like micelles, could be produced by variation of the absolute and relative length of both the blocks. The presence of complex “core”, which stabilized through hydrogen bonds and hydrophobic interactions, give an opportunity of such micelles to show a high binding capability with respect to toxic and hydrophobic drugs. The application of represented micelle-type polymeric nanocontainers for encapsulation and delivery in living organisms of anticancer drugs eumelanin and doxorubicin was shown. The essential influence of a state of micellar systems, parameters of micellization process, sizes and morphology of micelles, nature and length of micellar “coronas” on drug connection was considered and disscused.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"80 1","pages":"04NB22-1-04NB22-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74023378","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190301
V. Zayets, H. Saito, S. Yuasa
The fabrication technology of a low-propagation-loss plasmonic waveguide and the technology of the monolithical integration of a plasmonic and Si nanowire waveguides were established. It was found that both the out-of-plane confinement and the in-plane confinement are critically important in order to obtain a low propagation loss of a surface plasmon. Longdistance propagation of a surface plasmon on the surface of a ferromagnetic metal was demonstrated. A low propagation loss of 0.7 dB/μm for a surface plasmon in a Co/TiO2/SiO2 plasmonic structure on a Si substrate were achieved.
{"title":"Photonic integration of plasmonic Magneto-optical waveguide and Si nanowire waveguide","authors":"V. Zayets, H. Saito, S. Yuasa","doi":"10.1109/NAP.2017.8190301","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190301","url":null,"abstract":"The fabrication technology of a low-propagation-loss plasmonic waveguide and the technology of the monolithical integration of a plasmonic and Si nanowire waveguides were established. It was found that both the out-of-plane confinement and the in-plane confinement are critically important in order to obtain a low propagation loss of a surface plasmon. Longdistance propagation of a surface plasmon on the surface of a ferromagnetic metal was demonstrated. A low propagation loss of 0.7 dB/μm for a surface plasmon in a Co/TiO2/SiO2 plasmonic structure on a Si substrate were achieved.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"17 1","pages":"04NESP17-1-04NESP17-6"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74108298","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190351
I. Mysiura, O. Kalantaryan, S. Kononenko, V. Zhurenko, S. Bogatyrenko
Radioluminescence of zirconia powder and hot pressed nanoceramics was measured. The differences in luminescence spectra of powder and nanoceramics samples were explained by the change of the relation between intensities of two light emitting centers at 2.6 and 3.1 eV. The reason may be the transition of the crystal structure during hot pressing sintering of powder and formation of nanoceramics. Luminescence spectrum modification depended on the ratio of luminescence intensities of the peaks. We made the assumption that the intensity of the peaks (2.6 and 3.1 eV) correlated with the fraction of tetragonal and monoclinic phases in the crystal structure of the sample, respectively.
{"title":"Application of radioluminescence technique for zirkonia powder and nanoceramics","authors":"I. Mysiura, O. Kalantaryan, S. Kononenko, V. Zhurenko, S. Bogatyrenko","doi":"10.1109/NAP.2017.8190351","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190351","url":null,"abstract":"Radioluminescence of zirconia powder and hot pressed nanoceramics was measured. The differences in luminescence spectra of powder and nanoceramics samples were explained by the change of the relation between intensities of two light emitting centers at 2.6 and 3.1 eV. The reason may be the transition of the crystal structure during hot pressing sintering of powder and formation of nanoceramics. Luminescence spectrum modification depended on the ratio of luminescence intensities of the peaks. We made the assumption that the intensity of the peaks (2.6 and 3.1 eV) correlated with the fraction of tetragonal and monoclinic phases in the crystal structure of the sample, respectively.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"16 1","pages":"02MAN06-1-02MAN06-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74283426","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190225
F. Ozcan, Ş. Ertul
Polymer free calix[4]arene nanofibers were prepared via new electrospinning method with metal ion adsorption capacity. Two different calix[4]arene derivatives (compound 2 and 3) containing amide functionalities were used in this study, which were fully characterized by HNMR, FTIR and elemental analysis. Calix[4]arene nanofibers were analyzed with different surface characterization techniques such as SEM, TEM and AFM. SEM images of compound 2 and 3 nanofibers reveals there are non-bonded randomly grown fibers with average fiber diameter (AFD) was in the range of 237 to 307 nm for compoud 2 and 203–280 nm for compound. Adsorption study show the SEM-EDX mapping show adsorption of different metal ions (Hg+2, Pb+2, Cu+2, Co+2, Cd+2, Ni+2) on nanofibers. The the adsorption study show Hg+2, Pb+2 and Cu+2 adsorbed on nanofibers particularly at high pH. The maximum adsorption (98 %) was observed at pH 2 for Hg+2.
{"title":"Use of polymer-free calixarene nanofibers in heavy metal extractions","authors":"F. Ozcan, Ş. Ertul","doi":"10.1109/NAP.2017.8190225","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190225","url":null,"abstract":"Polymer free calix[4]arene nanofibers were prepared via new electrospinning method with metal ion adsorption capacity. Two different calix[4]arene derivatives (compound 2 and 3) containing amide functionalities were used in this study, which were fully characterized by HNMR, FTIR and elemental analysis. Calix[4]arene nanofibers were analyzed with different surface characterization techniques such as SEM, TEM and AFM. SEM images of compound 2 and 3 nanofibers reveals there are non-bonded randomly grown fibers with average fiber diameter (AFD) was in the range of 237 to 307 nm for compoud 2 and 203–280 nm for compound. Adsorption study show the SEM-EDX mapping show adsorption of different metal ions (Hg<sup>+2</sup>, Pb<sup>+2</sup>, Cu<sup>+2</sup>, Co<sup>+2</sup>, Cd<sup>+2</sup>, Ni<sup>+2</sup>) on nanofibers. The the adsorption study show Hg<sup>+2</sup>, Pb<sup>+2</sup> and Cu<sup>+2</sup> adsorbed on nanofibers particularly at high pH. The maximum adsorption (98 %) was observed at pH 2 for Hg<sup>+2</sup>.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"46 1","pages":"03CBN14-1-03CBN14-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74330980","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190149
A. V. Khomenko, D. Troshchenko, I. O. Solonar, P. Trofimenko
The special approach within nonequilibrium evolutional thermodynamics is developed. Considering two-defect approximation, which takes into account the densities of grain boundaries and dislocations, this theory describes the evolution of defect subsystems of polycrystalline materials and the formation of stationary submicrocrystalline or nanocrystalline structures. The influence of additive noise of basic parameters allows to describe more accurately the self-consistent behavior of considered structural defects and to provide the possibility of the existence of new fragmentation modes during severe plastic deformation. The phase diagram is constructed. The conditions of simultaneous existence of two limiting structures that correspond to the regime of the phases formation with different grain sizes are found. The distribution of the realization of grain boundaries density helps to estimate quantitatively the composition of grain structure over the volume of metal sample.
{"title":"Modeling the noise influence on the metals fragmentation modes at severe plastic deformation","authors":"A. V. Khomenko, D. Troshchenko, I. O. Solonar, P. Trofimenko","doi":"10.1109/NAP.2017.8190149","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190149","url":null,"abstract":"The special approach within nonequilibrium evolutional thermodynamics is developed. Considering two-defect approximation, which takes into account the densities of grain boundaries and dislocations, this theory describes the evolution of defect subsystems of polycrystalline materials and the formation of stationary submicrocrystalline or nanocrystalline structures. The influence of additive noise of basic parameters allows to describe more accurately the self-consistent behavior of considered structural defects and to provide the possibility of the existence of new fragmentation modes during severe plastic deformation. The phase diagram is constructed. The conditions of simultaneous existence of two limiting structures that correspond to the regime of the phases formation with different grain sizes are found. The distribution of the realization of grain boundaries density helps to estimate quantitatively the composition of grain structure over the volume of metal sample.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"18 1","pages":"01PCSI12-1-01PCSI12-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81013986","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190299
O. Diachenko, A. Opanasyuk, D. Kurbatov, O. Dobrozhan, V. Grynenko
In this paper, we present the results of the calculations of optical losses in the solar cell layers based on n-ZnMgO / p-CuO(p-Cu2O) heterojunctions with AZO and ITO front contacts. The calculations were carried out considering of light absorption in the auxiliary layers of the device. Thus, the spectral dependencies of transmittance in the absorber layer of solar cell were defined. It is made possible to optimize the design of the solar cells based on such heterojunctions.
{"title":"The optimization of functional layers of solar cells based on n-ZnMgO / p-CuO and n-ZnMgO / p-Cu2O heterojunctions","authors":"O. Diachenko, A. Opanasyuk, D. Kurbatov, O. Dobrozhan, V. Grynenko","doi":"10.1109/NAP.2017.8190299","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190299","url":null,"abstract":"In this paper, we present the results of the calculations of optical losses in the solar cell layers based on n-ZnMgO / p-CuO(p-Cu2O) heterojunctions with AZO and ITO front contacts. The calculations were carried out considering of light absorption in the auxiliary layers of the device. Thus, the spectral dependencies of transmittance in the absorber layer of solar cell were defined. It is made possible to optimize the design of the solar cells based on such heterojunctions.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"27 1","pages":"04NESP14-1-04NESP14-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86526996","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190316
K. Yamaguchi, Y. Uriu, K. Kageyama, M. Shimizu
We propose a method for determining whether an aqueous solution contains a phytopathogenic pythium. In this study, we developed an artificial membrane composed of cellulose film, with a polyethylene terephthalate film, containing a random plurality of through holes, serving as the substrate under the cellulose film. Phytopathogenic and non-phytopathogenic pythium in aqueous solution were supplied to the artificial membrane and left to rest for 24 h. When cellulose solutions with concentrations of 0.5∼3% were used to form the artificial membrane into which phytopathogenic pythiums penetrate and incubation time is 8–12 h, phytopathogenic pythiums appear selectively on the back surface of the cellulose film (i.e., the outside of the container) selectively. These results suggest that the artificial membrane could be a useful tool for detecting phytopathogenicity selectively from a mixture of two kinds of pythiums, namely phytopathogenic and nonphytopathogenic pythiums. We propose that this method of detecting phytopathogenic pythium can be applied to monitoring plant diseases in the agricultural industry.
{"title":"Development of a biosensor for selective detection of phytopathogenic pythiums","authors":"K. Yamaguchi, Y. Uriu, K. Kageyama, M. Shimizu","doi":"10.1109/NAP.2017.8190316","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190316","url":null,"abstract":"We propose a method for determining whether an aqueous solution contains a phytopathogenic pythium. In this study, we developed an artificial membrane composed of cellulose film, with a polyethylene terephthalate film, containing a random plurality of through holes, serving as the substrate under the cellulose film. Phytopathogenic and non-phytopathogenic pythium in aqueous solution were supplied to the artificial membrane and left to rest for 24 h. When cellulose solutions with concentrations of 0.5∼3% were used to form the artificial membrane into which phytopathogenic pythiums penetrate and incubation time is 8–12 h, phytopathogenic pythiums appear selectively on the back surface of the cellulose film (i.e., the outside of the container) selectively. These results suggest that the artificial membrane could be a useful tool for detecting phytopathogenicity selectively from a mixture of two kinds of pythiums, namely phytopathogenic and nonphytopathogenic pythiums. We propose that this method of detecting phytopathogenic pythium can be applied to monitoring plant diseases in the agricultural industry.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"4 1","pages":"04NB03-1-04NB03-3"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86561088","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190219
T. Bezugla, L. Grishchenko, A. Vakaliuk, A. Zaderko, V. Diyuk
Activated carbon fibers (ACFs) made from polyacrylonitrile and viscose were treated with the sulfur vapor at the temperatures of 500–800 °C in an argon flow. Obtained materials were oxidized by 30% H2O2 water solution in order to convert S-containing surface moieties into SO3H-groups. The samples were studied using Boehm titration, thermogravimetric analysis and temperature-programmed desorption with a mass spectrometric registration of gaseous desorption products. According to obtained data, the surface layer of synthesized samples contains grafted SO3H-groups and different functional groups formed at the carbon oxidation. The decomposition of SO3H-groups occurs in the temperature range of 75–590 °C. Two peak maxima at 200±30 °C and 300±30 °C were registered on all SO2 desorption profiles. These maxima are assigned to two forms of surface SO3H groups having a different chemical environment. Testing of the catalytic activity shows that SO3H-functionalized carbon fibers are high active in the model reaction of propan-2-ol dehydration. The total conversion of propan-2-ol to propene is observed at 145–220 °C. The lowest temperature of total conversion was registered for the ACFs prepared from polyacrylonitrile being treated with the sulfur vapor at 500 °C. All SO3H-functionalized samples maintain their activity after repeated use.
{"title":"Activated carbon fibers modified with sulfur-containing functional groups","authors":"T. Bezugla, L. Grishchenko, A. Vakaliuk, A. Zaderko, V. Diyuk","doi":"10.1109/NAP.2017.8190219","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190219","url":null,"abstract":"Activated carbon fibers (ACFs) made from polyacrylonitrile and viscose were treated with the sulfur vapor at the temperatures of 500–800 °C in an argon flow. Obtained materials were oxidized by 30% H<inf>2</inf>O<inf>2</inf> water solution in order to convert S-containing surface moieties into SO<inf>3</inf>H-groups. The samples were studied using Boehm titration, thermogravimetric analysis and temperature-programmed desorption with a mass spectrometric registration of gaseous desorption products. According to obtained data, the surface layer of synthesized samples contains grafted SO<inf>3</inf>H-groups and different functional groups formed at the carbon oxidation. The decomposition of SO<inf>3</inf>H-groups occurs in the temperature range of 75–590 °C. Two peak maxima at 200±30 °C and 300±30 °C were registered on all SO<inf>2</inf> desorption profiles. These maxima are assigned to two forms of surface SO<inf>3</inf>H groups having a different chemical environment. Testing of the catalytic activity shows that SO<inf>3</inf>H-functionalized carbon fibers are high active in the model reaction of propan-2-ol dehydration. The total conversion of propan-2-ol to propene is observed at 145–220 °C. The lowest temperature of total conversion was registered for the ACFs prepared from polyacrylonitrile being treated with the sulfur vapor at 500 °C. All SO<inf>3</inf>H-functionalized samples maintain their activity after repeated use.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"7 1","pages":"03CBN06-1-03CBN06-5"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85549655","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190188
V. Burakov, V. V. Kirys, A. Nevar, M. Nedelko, N. Tarasenko, N. Tarasenka
Nickel-carbon composite nanoparticles have been prepared by electrical discharge in liquid. The discharge in ethanol was ignited between two nickel electrodes with an argon flow through the discharge gap and with the absence of gas flux. The size, morphology and composition of the formed nanoparticles were characterized.
{"title":"Properties of Ni-C nanoparticles synthesized by submerged electrical discharge in ethanol","authors":"V. Burakov, V. V. Kirys, A. Nevar, M. Nedelko, N. Tarasenko, N. Tarasenka","doi":"10.1109/NAP.2017.8190188","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190188","url":null,"abstract":"Nickel-carbon composite nanoparticles have been prepared by electrical discharge in liquid. The discharge in ethanol was ignited between two nickel electrodes with an argon flow through the discharge gap and with the absence of gas flux. The size, morphology and composition of the formed nanoparticles were characterized.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"45 1","pages":"01NNPT08-1-01NNPT08-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85114595","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}
Pub Date : 2017-09-01DOI: 10.1109/NAP.2017.8190160
L. Matveeva, E. Kolyadina, R. Konakova, I. N. Matiyuk, V. F. Mitin, V. V. Kholevchuk, E. Venger
Nanostructures with germanium films on semi-insulating indium phosphide substrates were prepared by thermal deposition in vacuum of 10−4 Pa at different film growth rate (0.08–0.675 Ǻ/sec). The substrate thickness was the same for all heterosystems (300 μm). The substrate temperature was about 300 °C (296–312 °C), and was kept constant during the growth of the film. To study heterosystems, a set of experimental methods was used: classical light absorption spectroscopy, modulation electroreflectance spectroscopy, measurement of internal mechanical stresses in a film along the bend of heterosystems measured on a profilometer. The value of the mechanical stresses was also determined from the absorption and electroreflectance spectra. Tails of the density of states in the band gap of germanium films are detected. The value of the characteristic energy Δ and the broadening parameter of the electroreflectance spectrum depended on the manufacturing condition of heterosystems (deposition rate of film and its thickness). The most perfect films were obtained at a higher deposition rate of 0.675 Ǻ/s. Its thickness was 0.67 μm, and the deposition temperature was 296 °C.
{"title":"Nanotechnology, internal mechanical stresses, optical and electronic properties of nanostructures with germanium films on indium phosphide substrates","authors":"L. Matveeva, E. Kolyadina, R. Konakova, I. N. Matiyuk, V. F. Mitin, V. V. Kholevchuk, E. Venger","doi":"10.1109/NAP.2017.8190160","DOIUrl":"https://doi.org/10.1109/NAP.2017.8190160","url":null,"abstract":"Nanostructures with germanium films on semi-insulating indium phosphide substrates were prepared by thermal deposition in vacuum of 10−4 Pa at different film growth rate (0.08–0.675 Ǻ/sec). The substrate thickness was the same for all heterosystems (300 μm). The substrate temperature was about 300 °C (296–312 °C), and was kept constant during the growth of the film. To study heterosystems, a set of experimental methods was used: classical light absorption spectroscopy, modulation electroreflectance spectroscopy, measurement of internal mechanical stresses in a film along the bend of heterosystems measured on a profilometer. The value of the mechanical stresses was also determined from the absorption and electroreflectance spectra. Tails of the density of states in the band gap of germanium films are detected. The value of the characteristic energy Δ and the broadening parameter of the electroreflectance spectrum depended on the manufacturing condition of heterosystems (deposition rate of film and its thickness). The most perfect films were obtained at a higher deposition rate of 0.675 Ǻ/s. Its thickness was 0.67 μm, and the deposition temperature was 296 °C.","PeriodicalId":6516,"journal":{"name":"2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)","volume":"1 1","pages":"01PCSI29-1-01PCSI29-4"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91224096","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}
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