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Ozawa N, Nagahama H, Sakemi Y. Francium ion source with novel methods of target heating and beam characterization. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:023306. [PMID: 36859041 DOI: 10.1063/5.0118754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
We have developed a novel ion source and beam diagnostic system for the production and detection of radioactive francium (Fr) isotopes. The Fr ions are produced using a fusion-evaporation reaction at the RIKEN Nishina Center, Japan. The installation of an infrared heater has enabled a precise and rapid control of the target temperature, and the newly developed diagnostic system allows for a quantitative characterization of the extracted ion beam. With the new system, an analysis of the Fr208-211 isotopes has been performed. Additionally, the flux of Fr210 ions has been estimated as 6.7 × 106 s-1 corresponding to an extraction efficiency of 24.5% and a beam purity of 1.6 × 10-5.
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Affiliation(s)
- N Ozawa
- Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - H Nagahama
- Center for Nuclear Study, Graduate School of Science, The University of Tokyo, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Y Sakemi
- Center for Nuclear Study, Graduate School of Science, The University of Tokyo, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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Mikkelä MH, Jänkälä K, Huttula M, Björneholm O, Tchaplyguine M. Free silver nanoparticles doped by potassium: Work-function change in experiment and theory. J Chem Phys 2021; 154:234708. [PMID: 34241256 DOI: 10.1063/5.0052101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The composition-dependent change in the work-function (WF) of binary silver-potassium nanoparticles has been studied experimentally by synchrotron-based x-ray photoelectron spectroscopy (PES) and theoretically using a microscopic jellium model of metals. The Ag-K particles with different K fractions were produced by letting a beam of preformed Ag particles pass through a volume with K vapor. The PES on a beam of individual non-supported Ag-K nanoparticles created in this way allowed a direct absolute measurement of their WF, avoiding several usual shortcomings of the method. Experimentally, the WF has been found to be very sensitive to K concentration: Already at low exposure, it decreased down to ≈2 eV-below the value of pure K. In the jellium modeling, considered for Ag-K nanoparticles, two principally different adsorption patterns were tested: without and with K diffusion. The experimental and calculation results together suggest that only efficient surface alloying of two metals, whose immiscibility was long-term textbook knowledge, could lead to the observed WF values.
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Affiliation(s)
| | - Kari Jänkälä
- Nano and Molecular Systems Research Unit, University of Oulu, 90014 Oulu, Finland
| | - Marko Huttula
- Nano and Molecular Systems Research Unit, University of Oulu, 90014 Oulu, Finland
| | - Olle Björneholm
- Department of Physics and Astronomy, Uppsala University, 75120 Uppsala, Sweden
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Liu Y, Liu C, Wang J, Gao Q, Hu Z, Hao W, Xu X, Du Y, Zhuang J. Reversible Potassium Intercalation in Blue Phosphorene-Au Network Driven by an Electric Field. J Phys Chem Lett 2020; 11:5584-5590. [PMID: 32584041 DOI: 10.1021/acs.jpclett.0c01835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Foreign atom intercalation into an interface alters the strength of interlayer interaction and leads to the novel types of desirable properties. Here, we report an investigation via scanning tunnelling microscopy (STM) and scanning tunnelling spectroscopy (STS) of reversible potassium (K) intercalation in the blue phosphorene (blueP)-Au network that can be locally induced by an external electric field. The unique structure of the blueP-Au network provides large space in its pores for the intercalation and deintercalation process. The X-ray photoemission spectroscopy results reveal that the intercalated K atoms are bonded with Au atoms in substrate, which weakens the interaction between the blueP-Au network and Au(111). The STS and angle-resolved photoemission spectroscopy results indicate that the electronic properties of the blueP-Au network have been modulated after the K intercalation. Such reversible intercalation and deintercalation transitions in the blueP-Au network are relevant for the design of the nanoelectronic devices as well as for its application in K-ion batteries.
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Affiliation(s)
- Yani Liu
- BUAA-UOW Joint Centre, School of Physics, Beihang University, Haidian District, Beijing 100091, China
- Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW 2525, Australia
| | - Chen Liu
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jiaou Wang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Qian Gao
- School of Physics, Nankai University, Tianjin 300071, China
| | - Zhenpeng Hu
- School of Physics, Nankai University, Tianjin 300071, China
| | - Weichang Hao
- BUAA-UOW Joint Centre, School of Physics, Beihang University, Haidian District, Beijing 100091, China
| | - Xun Xu
- Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW 2525, Australia
| | - Yi Du
- BUAA-UOW Joint Centre, School of Physics, Beihang University, Haidian District, Beijing 100091, China
- Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW 2525, Australia
| | - Jincheng Zhuang
- BUAA-UOW Joint Centre, School of Physics, Beihang University, Haidian District, Beijing 100091, China
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Lee BJ, Gebhardt C, Schröder H, Kompa K, Dürr M. Observation of ionic desorption channels in cluster-induced desorption of alkali halides – Influence of surface electronic properties and surface configuration. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.11.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Affiliation(s)
- Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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Weiss C, Wagner C, Temirov R, Tautz FS. Direct Imaging of Intermolecular Bonds in Scanning Tunneling Microscopy. J Am Chem Soc 2010; 132:11864-5. [DOI: 10.1021/ja104332t] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christian Weiss
- Institut für Bio- und Nanosysteme 3, Forschungszentrum Jülich, 52425 Jülich, Germany and JARA-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Christian Wagner
- Institut für Bio- und Nanosysteme 3, Forschungszentrum Jülich, 52425 Jülich, Germany and JARA-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - Ruslan Temirov
- Institut für Bio- und Nanosysteme 3, Forschungszentrum Jülich, 52425 Jülich, Germany and JARA-Fundamentals of Future Information Technology, 52425 Jülich, Germany
| | - F. Stefan Tautz
- Institut für Bio- und Nanosysteme 3, Forschungszentrum Jülich, 52425 Jülich, Germany and JARA-Fundamentals of Future Information Technology, 52425 Jülich, Germany
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Chen MH, Lu YJ, Chang YJ, Wu CC, Wu CI. Interfacial Reactions and Doping in Organic Light Emitting Diodes Incorporated with Cesium-Based Compounds. ACTA ACUST UNITED AC 2010. [DOI: 10.1149/1.3354982] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Karttunen AJ, Pakkanen TA. MP2 Study on Adsorption of Hydrated Na+ and Au+ Cations on the Au(111) Surface. J Phys Chem B 2006; 110:25926-30. [PMID: 17181241 DOI: 10.1021/jp066205x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The interactions of Na+ and Au+ cations with an Au(111) surface in the presence and absence of water molecules were investigated using Au18 and Au22 cluster models and the MP2 method with a triple-zeta valence basis set. The interactions between Na+ ions and the Au(111) surface were found to be primarily electrostatic, contrary to the much stronger Au+-Au(111) interactions that were dominated by orbital contributions. The largest CP-corrected MP2 adsorption energies were -156.9 kJ/mol for Na+ and -478.7 kJ/mol for Au+. When hydrated, Na+ prefers to be completely surrounded by water molecules rather than adsorbed to the surface, whereas Au+ remains adsorbed to the surface as water molecules bond with each other and with the Au surface. CP correction did not change the relative adsorption energy trends of Na+ or Au+ ions, but it had an effect on the interaction energy trends of the hydrated cations because of the weak water-surface and water-water interactions.
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Affiliation(s)
- Antti J Karttunen
- Department of Chemistry, University of Joensuu, P.O. Box 111, FI-80101 Joensuu, Finland
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Fung M, Lai S, Tong S, Bao S, Lee C, Lee S. Interface gap states of 8-hydroxyquinoline aluminum induced by cesium metal. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.05.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Mendoza-Huizar L, Palomar-Pardave M, Robles J. A theoretical quantum study on the distribution of electrophilic and nucleophilic active sites on the Au(100) surface modeled as finite clusters. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.theochem.2004.03.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ahn H, Whitten JE. Vapor-Deposition of Aluminum on Thiophene-Terminated Self-Assembled Monolayers on Gold. J Phys Chem B 2003. [DOI: 10.1021/jp030096u] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Heejoon Ahn
- The Department of Chemistry and Center for Advanced Materials, The University of Massachusetts Lowell, Lowell, Massachusetts 01854-5047
| | - James E. Whitten
- The Department of Chemistry and Center for Advanced Materials, The University of Massachusetts Lowell, Lowell, Massachusetts 01854-5047
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Lai S, Fung M, Bao S, Tong S, Chan M, Lee C, Lee S. Interfaces between 8-hydroxyquinoline aluminum and cesium as affected by their deposition sequences. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(02)01790-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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