Synthetic mica was employed as a substrate for thin film growth and atomically flat Nickel thin film was heteroepitaxially formed. In addition to the small rms surface roughness achieved ( ＜ 1 nm), the surface morphology appears to be comparable to that of commercially available gold mica. Film growth was not complicated and consisted of nickel deposition and substrate annealing. The authors expect that as long as synthetic mica and standard film growth techniques are available, our results can be reproduced easily.
{"title":"Fabrication of Atomically Flat Nickel Thin Film on Synthetic Mica","authors":"Hiroyuki Tanaka, M. Taniguchi","doi":"10.1380/JSSSJ.38.336","DOIUrl":"https://doi.org/10.1380/JSSSJ.38.336","url":null,"abstract":"Synthetic mica was employed as a substrate for thin film growth and atomically flat Nickel thin film was heteroepitaxially formed. In addition to the small rms surface roughness achieved ( ＜ 1 nm), the surface morphology appears to be comparable to that of commercially available gold mica. Film growth was not complicated and consisted of nickel deposition and substrate annealing. The authors expect that as long as synthetic mica and standard film growth techniques are available, our results can be reproduced easily.","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"6 3","pages":"336-340"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91405874","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}
H. Imada, K. Miwa, Miyabi Imai-Imada, Shota Kawahara, Kensuke Kimura, Yousoo Kim
Energy transfer is an essential process in photosynthesis and various energy-harvesting devices. So far, nanoscale features of energy transfers are unknown because of the limited spatial resolution of conventional methods. We conducted a molecular-level investigation of energy transfers in molecular dimers consisting of a free-base phthalocyanine and magnesium phthalocyanine (H 2 Pc and MgPc) by scanning tunneling luminescence spectroscopy. Local excitation of an MgPc with the tunneling current of a scanning tunneling microscope give rise to luminescence from a nearby H 2 Pc as a result of energy transfer. We demonstrate the possibility of a single-molecule valve device for energy transfer, which is revealed by a blinking behavior of energy transfer. Moreover, a back-and-forth energy transfer was observed, where the energy was transferred from the second singlet state (so-called Q y state) of H 2 Pc to the first singlet state ( Q state) of MgPc and finally to the first singlet state ( Q x state) of H 2 Pc.
{"title":"Real-Space Investigation of Intermolecular Energy Transfer by Scanning Tunneling Luminescence Spectroscopy","authors":"H. Imada, K. Miwa, Miyabi Imai-Imada, Shota Kawahara, Kensuke Kimura, Yousoo Kim","doi":"10.1380/JSSSJ.38.455","DOIUrl":"https://doi.org/10.1380/JSSSJ.38.455","url":null,"abstract":"Energy transfer is an essential process in photosynthesis and various energy-harvesting devices. So far, nanoscale features of energy transfers are unknown because of the limited spatial resolution of conventional methods. We conducted a molecular-level investigation of energy transfers in molecular dimers consisting of a free-base phthalocyanine and magnesium phthalocyanine (H 2 Pc and MgPc) by scanning tunneling luminescence spectroscopy. Local excitation of an MgPc with the tunneling current of a scanning tunneling microscope give rise to luminescence from a nearby H 2 Pc as a result of energy transfer. We demonstrate the possibility of a single-molecule valve device for energy transfer, which is revealed by a blinking behavior of energy transfer. Moreover, a back-and-forth energy transfer was observed, where the energy was transferred from the second singlet state (so-called Q y state) of H 2 Pc to the first singlet state ( Q state) of MgPc and finally to the first singlet state ( Q x state) of H 2 Pc.","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"23 1","pages":"455-459"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77218695","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}
T. Ono, Y. Kanai, S. Okuda, Y. Ohno, K. Maehashi, Koichi Inoue, K. Matsumoto
Graphene has attracted much attention since its discovery and has been studied in variety of research fields from quantum physics to biomedical engineering due to its unique properties. The authors have focused on graphene’s keen electrical response to charged biomolecules and investigated biosensing application of graphene field-effect transistor, naming it “lab on a graphene”. In this article, their research progress is reported. The charged biomolecules induce hole or electron carriers to graphene channel and can be detected as a drain current change. Graphene’s high carrier mobility, two-dimensional structure and electrochemical stability achieve highly sensitive and speedy detection. While the bare graphene successfully detected pH changes, aptamer-modified graphene transistor realized specific detection of immunoglobulin E with the detection limit of 290 pM. The authors recently applied this high sensitivity to the detection of human-infectious avian influenza virus. In the preliminary results using pseudo-virus (lectin), glycan-modified graphene transistor shows high specificity of infectivity and sensitivity at subnanomolar range. Novel fabrication process for flexible graphene device and wireless operation of graphene transistor are also reported.
{"title":"Lab on a Graphene: Biosensing Application of Graphene Field-Effect Transistor: —Lab on a Graphene—","authors":"T. Ono, Y. Kanai, S. Okuda, Y. Ohno, K. Maehashi, Koichi Inoue, K. Matsumoto","doi":"10.1380/jsssj.38.466","DOIUrl":"https://doi.org/10.1380/jsssj.38.466","url":null,"abstract":"Graphene has attracted much attention since its discovery and has been studied in variety of research fields from quantum physics to biomedical engineering due to its unique properties. The authors have focused on graphene’s keen electrical response to charged biomolecules and investigated biosensing application of graphene field-effect transistor, naming it “lab on a graphene”. In this article, their research progress is reported. The charged biomolecules induce hole or electron carriers to graphene channel and can be detected as a drain current change. Graphene’s high carrier mobility, two-dimensional structure and electrochemical stability achieve highly sensitive and speedy detection. While the bare graphene successfully detected pH changes, aptamer-modified graphene transistor realized specific detection of immunoglobulin E with the detection limit of 290 pM. The authors recently applied this high sensitivity to the detection of human-infectious avian influenza virus. In the preliminary results using pseudo-virus (lectin), glycan-modified graphene transistor shows high specificity of infectivity and sensitivity at subnanomolar range. Novel fabrication process for flexible graphene device and wireless operation of graphene transistor are also reported.","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"239 1","pages":"466-472"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76764614","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":"Report on Joint Symposium of the Surface Science Society of Japan and the Vacuum Society of Japan (SSVS 2016)","authors":"H. Nakahara","doi":"10.1380/jsssj.38.199","DOIUrl":"https://doi.org/10.1380/jsssj.38.199","url":null,"abstract":"","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"440 1","pages":"199-200"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79637543","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}
Here we report our recent progress as to single crystalline metal oxide nanowires towards the nano-device applications. As the basis of such fundamental science, we focus on (1) formation technology of highly crystalline nanowires, (2) evaluation technology of single nanowire physical properties, and (3) control of spatial nanowire positions. Especially, I focus on our recent progress of our research group, which are related to single crystalline nanowires comprised of functional metal oxide materials and their memristive devices.
{"title":"Fabrication of Single Crystalline Metal Oxide Nanowires Based on Spatial Selectivity of Molecules","authors":"T. Yanagida, K. Nagashima","doi":"10.1380/JSSSJ.38.351","DOIUrl":"https://doi.org/10.1380/JSSSJ.38.351","url":null,"abstract":"Here we report our recent progress as to single crystalline metal oxide nanowires towards the nano-device applications. As the basis of such fundamental science, we focus on (1) formation technology of highly crystalline nanowires, (2) evaluation technology of single nanowire physical properties, and (3) control of spatial nanowire positions. Especially, I focus on our recent progress of our research group, which are related to single crystalline nanowires comprised of functional metal oxide materials and their memristive devices.","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"57 1","pages":"351-356"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79682140","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":"Back to the Arizona","authors":"T. Masuda","doi":"10.1380/JSSSJ.38.44","DOIUrl":"https://doi.org/10.1380/JSSSJ.38.44","url":null,"abstract":"","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"60 6 1","pages":"44-45"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83392155","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}
Ion scattering spectrometry has been widely used in materials analysis of thin films and atomic structures near surface regions. The notable point of this method is its reliability due to the simple and well-established principle and direct observation in real space, in contrast to diffraction (momentum space) techniques using electrons and X-rays. This article first represents the physical basis of ion scattering analysis and then introduces a recent topic of nano-particles analysis, i. e. determination of the shape and size of Au nano-particles and Au-Pd core cells.
{"title":"Energetic-particle-sold Interactions and Applications to Surface Analysis","authors":"Y. Kido","doi":"10.1380/JSSSJ.38.150","DOIUrl":"https://doi.org/10.1380/JSSSJ.38.150","url":null,"abstract":"Ion scattering spectrometry has been widely used in materials analysis of thin films and atomic structures near surface regions. The notable point of this method is its reliability due to the simple and well-established principle and direct observation in real space, in contrast to diffraction (momentum space) techniques using electrons and X-rays. This article first represents the physical basis of ion scattering analysis and then introduces a recent topic of nano-particles analysis, i. e. determination of the shape and size of Au nano-particles and Au-Pd core cells.","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"88 1","pages":"150-157"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83816244","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}
Recent results on grazing-incidence small-angle scattering have been introduced with emphasis on the use of tender Xrays. Merit of using longer wavelength to understand depth dependence of nanostructures in thin films are presented, along with some drawbacks in using long wavelength. Applications on semiconductor nanodots and micro-phase separated block copolymer thin films are shown. Use of resonant scattering in the tender X-ray region gives opportunity for contrast matching GISAXS experiments, which may reduce complicated situation of dynamical effect upon analysis.
{"title":"Nanostructures of Thin Films Near the Surface Examined by GISAXS Utilizing Tender X-rays","authors":"H. Okuda","doi":"10.1380/JSSSJ.38.548","DOIUrl":"https://doi.org/10.1380/JSSSJ.38.548","url":null,"abstract":"Recent results on grazing-incidence small-angle scattering have been introduced with emphasis on the use of tender Xrays. Merit of using longer wavelength to understand depth dependence of nanostructures in thin films are presented, along with some drawbacks in using long wavelength. Applications on semiconductor nanodots and micro-phase separated block copolymer thin films are shown. Use of resonant scattering in the tender X-ray region gives opportunity for contrast matching GISAXS experiments, which may reduce complicated situation of dynamical effect upon analysis.","PeriodicalId":13075,"journal":{"name":"Hyomen Kagaku","volume":"28 2","pages":"548-552"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72578076","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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