1
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Imperato M, Nicolini A, Boniburini M, Sartini D, Benassi E, Chiesa M, Gigli L, Liao YK, Raza A, Salvadori E, Sorace L, Cornia A. Dual Structure of a Vanadyl-Based Molecular Qubit Containing a Bis(β-diketonato) Ligand. Inorg Chem 2024; 63:7912-7925. [PMID: 38620046 DOI: 10.1021/acs.inorgchem.4c00834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
We designed [VO(bdhb)] (1') as a new electronic qubit containing an oxovanadium(IV) ion (S = 1/2) embraced by a single bis(β-diketonato) ligand [H2bdhb = 1,3-bis(3,5-dioxo-1-hexyl)benzene]. The synthesis afforded three different crystal phases, all of which unexpectedly contain dimers with formula [(VO)2(bdhb)2] (1). A trigonal form (1h) with a honeycomb structure and 46% of solvent-accessible voids quantitatively transforms over time into a monoclinic solvatomorph 1m and minor amounts of a triclinic solventless phase (1a). In a static magnetic field, 1h and 1m have detectably slow magnetic relaxation at low temperatures through quantum tunneling and Raman mechanisms. Angle-resolved electron paramagnetic resonance (EPR) spectra on single crystals revealed signatures of low-dimensional magnetic behavior, which is solvatomorph-dependent, being the closest interdimer V···V separations (6.7-7.5 Å) much shorter than intramolecular V···V distances (11.9-12.1 Å). According to 1H diffusion ordered spectroscopy (DOSY) and EPR experiments, the complex adopts the desired monomeric structure in organic solution and its geometry was inferred from density functional theory (DFT) calculations. Spin relaxation measurements in a frozen toluene-d8/CD2Cl2 matrix yielded Tm values reaching 13 μs at 10 K, and coherent spin manipulations were demonstrated by Rabi nutation experiments at 70 K. The neutral quasi-macrocyclic structure, featuring nuclear spin-free donors and additional possibilities for chemical functionalization, makes 1' a new convenient spin-coherent building block in quantum technologies.
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Affiliation(s)
- Manuel Imperato
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
- Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 213/A, 41125 Modena, Italy
| | - Alessio Nicolini
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
| | - Matteo Boniburini
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
| | - Daniele Sartini
- Dipartimento di Chimica "Ugo Schiff" e UdR INSTM, Università degli Studi di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Enrico Benassi
- Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 213/A, 41125 Modena, Italy
| | - Mario Chiesa
- Dipartimento di Chimica e NIS Centre, Università degli Studi di Torino, via P. Giuria 7, 10125 Torino, Italy
| | - Lara Gigli
- Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14 - km 163.5 in AREA Science Park, 34149 Basovizza (TS), Italy
| | - Yu-Kai Liao
- Dipartimento di Chimica e NIS Centre, Università degli Studi di Torino, via P. Giuria 7, 10125 Torino, Italy
| | - Arsen Raza
- Dipartimento di Chimica "Ugo Schiff" e UdR INSTM, Università degli Studi di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Enrico Salvadori
- Dipartimento di Chimica e NIS Centre, Università degli Studi di Torino, via P. Giuria 7, 10125 Torino, Italy
| | - Lorenzo Sorace
- Dipartimento di Chimica "Ugo Schiff" e UdR INSTM, Università degli Studi di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
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2
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Imperato M, Nicolini A, Borsari M, Briganti M, Chiesa M, Liao YK, Ranieri A, Raza A, Salvadori E, Sorace L, Cornia A. Quantum spin coherence and electron spin distribution channels in vanadyl-containing lantern complexes. Inorg Chem Front 2023; 11:186-195. [PMID: 38221947 PMCID: PMC10782212 DOI: 10.1039/d3qi01806g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 11/02/2023] [Indexed: 01/16/2024]
Abstract
We herein investigate the heterobimetallic lantern complexes [PtVO(SOCR)4] as charge neutral electronic qubits based on vanadyl complexes (S = 1/2) with nuclear spin-free donor atoms. The derivatives with R = Me (1) and Ph (2) give highly resolved X-band EPR spectra in frozen CH2Cl2/toluene solution, which evidence the usual hyperfine coupling with the 51V nucleus (I = 7/2) and an additional superhyperfine interaction with the I = 1/2 nucleus of the 195Pt isotope (natural abundance ca. 34%). DFT calculations ascribe the spin density delocalization on the Pt2+ ion to a combination of π and δ pathways, with the former representing the predominant channel. Spin relaxation measurements in frozen CD2Cl2/toluene-d8 solution between 90 and 10 K yield Tm values (1-6 μs in 1 and 2-11 μs in 2) which compare favorably with those of known vanadyl-based qubits in similar matrices. Coherent spin manipulations indeed prove possible at 70 K, as shown by the observation of Rabi oscillations in nutation experiments. The results indicate that the heavy Group 10 metal ion is not detrimental to the coherence properties of the vanadyl moiety and that Pt-VO lanterns can be used as robust spin-coherent building blocks in materials science and quantum technologies.
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Affiliation(s)
- Manuel Imperato
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia via G. Campi 103 41125 Modena Italy
- Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia via G. Campi 213/A 41125 Modena Italy
| | - Alessio Nicolini
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia via G. Campi 103 41125 Modena Italy
| | - Marco Borsari
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia via G. Campi 103 41125 Modena Italy
| | - Matteo Briganti
- Dipartimento di Chimica "Ugo Schiff" e UdR INSTM, Università degli Studi di Firenze via della Lastruccia 3 50019 Sesto Fiorentino FI Italy
| | - Mario Chiesa
- Dipartimento di Chimica e NIS Centre, Università degli Studi di Torino via P. Giuria 7 10125 Torino Italy
| | - Yu-Kai Liao
- Dipartimento di Chimica e NIS Centre, Università degli Studi di Torino via P. Giuria 7 10125 Torino Italy
| | - Antonio Ranieri
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia via G. Campi 103 41125 Modena Italy
| | - Arsen Raza
- Dipartimento di Chimica "Ugo Schiff" e UdR INSTM, Università degli Studi di Firenze via della Lastruccia 3 50019 Sesto Fiorentino FI Italy
| | - Enrico Salvadori
- Dipartimento di Chimica e NIS Centre, Università degli Studi di Torino via P. Giuria 7 10125 Torino Italy
| | - Lorenzo Sorace
- Dipartimento di Chimica "Ugo Schiff" e UdR INSTM, Università degli Studi di Firenze via della Lastruccia 3 50019 Sesto Fiorentino FI Italy
| | - Andrea Cornia
- Dipartimento di Scienze Chimiche e Geologiche e UdR INSTM, Università degli Studi di Modena e Reggio Emilia via G. Campi 103 41125 Modena Italy
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3
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Liao YK, Liu RS, Yao ST, Hu SF. In Situ and Low-Cost Improvement of the Lithium Anode Interface in Garnet-Type Solid-State Electrolytes. ACS Appl Mater Interfaces 2023. [PMID: 38016108 DOI: 10.1021/acsami.3c13222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
In recent years, the development of electric vehicles and environmental concerns have made necessary improvements in the energy density and safety of lithium-ion batteries. Therefore, the development of all-solid-state lithium-ion batteries (ASSLIBs) has become imperative. One advantage of ASSLIBs is their potential for downsizing with the use of lithium metal as the anode. However, in this study, a garnet-type solid electrolyte (Li6.75La3Zr1.75Ta0.25O12) was used, which has low reactivity with lithium metal. Thus, interface modification using CaCl2 was employed to form a Li-Ca-Cl composite anode. The interfacial resistance was remarkably reduced to 7 Ω cm2, and the symmetric cell exhibited stable cycling for 1200 h at room temperature and a current density of 0.1 mA cm-2. The voltage ranged from ±15 to ±16 mV. The full cell demonstrated a high initial discharge capacity of 149.2 mA h g-1 and a Coulombic efficiency of 98.0% while maintaining a discharge capacity retention of 91.3% after 100 cycles. These findings lay a solid foundation for future commercial applications as interface modification was achieved through a simple spin-coating process using low-cost CaCl2 (0.7 USD g-1).
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
| | | | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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Ranieri D, Privitera A, Santanni F, Urbanska K, Strachan GJ, Twamley B, Salvadori E, Liao YK, Chiesa M, Senge MO, Totti F, Sorace L, Sessoli R. A Heterometallic Porphyrin Dimer as a Potential Quantum Gate: Magneto-Structural Correlations and Spin Coherence Properties. Angew Chem Int Ed Engl 2023; 62:e202312936. [PMID: 37812016 DOI: 10.1002/anie.202312936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/10/2023]
Abstract
In the development of two-qubit quantum gates, precise control over the intramolecular spin-spin interaction between molecular spin units plays a pivotal role. A weak but measurable exchange coupling is especially important for achieving selective spin addressability that allows controlled manipulation of the computational basis states |00⟩ |01⟩ |10⟩ |11⟩ by microwave pulses. Here, we report the synthesis and Electron Paramagnetic Resonance (EPR) study of a heterometallic meso-meso (m-m) singly-linked VIV O-CuII porphyrin dimer. X-band continuous wave EPR measurements in frozen solutions suggest a ferromagnetic exchange coupling of ca. 8 ⋅ 10-3 cm-1 . This estimation is supported by Density Functional Theory calculations, which also allow disentangling the ferro- and antiferromagnetic contributions to the exchange. Pulsed EPR experiments show that the dimer maintains relaxation times similar to the monometallic CuII porphyrins. The addressability of the two individual spins is made possible by the different g-tensors of VIV and CuII -ions, in contrast to homometallic dimers where tilting of the porphyrin planes plays a key role. Therefore, single-spin addressability in the heterometallic dimer can be maintained even with small tilting angles, as expected when deposited on surface, unlocking the full potential of molecular quantum gates for practical applications.
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Affiliation(s)
- Davide Ranieri
- Department of Chemistry "Ugo Schiff" & INSTM RU, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Alberto Privitera
- Department of Chemistry "Ugo Schiff" & INSTM RU, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
- Department of Industrial Engineering & INSTM RU, University of Florence, Via Santa Marta 3, 50139, Firenze, Italy
| | - Fabio Santanni
- Department of Chemistry "Ugo Schiff" & INSTM RU, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Karolina Urbanska
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, D02R590, Dublin, Ireland
| | - Grant J Strachan
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, D02R590, Dublin, Ireland
| | - Brendan Twamley
- School of Chemistry, Trinity College Dublin, The University of Dublin, Dublin, 2, Ireland
| | - Enrico Salvadori
- Department of Chemistry and NIS, University of Turin, Via P. Giuria 7, 10125, Torino, Italy
| | - Yu-Kai Liao
- Department of Chemistry and NIS, University of Turin, Via P. Giuria 7, 10125, Torino, Italy
| | - Mario Chiesa
- Department of Chemistry and NIS, University of Turin, Via P. Giuria 7, 10125, Torino, Italy
| | - Mathias O Senge
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, D02R590, Dublin, Ireland
- Institute for Advanced Study (TUM-IAS), Technical University of Munich, Focus Group-Molecular and Interfacial Engineering of Organic Nano-systems, Lichtenberg-Str.2a, 85748, Garching, Germany
| | - Federico Totti
- Department of Chemistry "Ugo Schiff" & INSTM RU, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Lorenzo Sorace
- Department of Chemistry "Ugo Schiff" & INSTM RU, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Roberta Sessoli
- Department of Chemistry "Ugo Schiff" & INSTM RU, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
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Srivastava P, Liao YK, Iputera K, Hu SF, Liu RS. Robust and Intimate Interface Enabled by Silicon Carbide as an Additive to Anodes for Lithium Metal Solid-State Batteries. ChemSusChem 2023; 16:e202300504. [PMID: 37505227 DOI: 10.1002/cssc.202300504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 06/06/2023] [Indexed: 07/29/2023]
Abstract
Garnet-type solid-state electrolytes are among the most reassuring candidates for the development of solid-state lithium metal batteries (SSLMB) because of their wide electrochemical stability window and chemical feasibility with lithium. However, issues such as poor physical contact with Li metal tend to limit their practical applications. These problems were addressed using β-SiC as an additive to the Li anode, resulting in improved wettability over Li6.75 La3 Zr1.75 Ta0.25 O12 (LLZTO) and establishing an improved interfacial contact. At the Li-SiC|LLZTO interface, intimacy was induced by a lithiophilic Li4 SiO4 phase, whereas robustness was attained through the hard SiC phase. The optimized Li-SiC|LLZTO|Li-SiC symmetric cell displayed a low interfacial impedance of 10 Ω cm2 and superior cycling stability at varying current densities up to 5800 h. Moreover, the modified interface could achieve a high critical current density of 4.6 mA cm-2 at room temperature and cycling stability of 1000 h at 3.5 mA cm-2 . The use of mechanically superior materials such as SiC as additives for the preparation of a composite anode may serve as a new strategy for robust garnet-based SSLMB.
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Affiliation(s)
- Pavitra Srivastava
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
| | - Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan
| | - Kevin Iputera
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei, 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106, Taiwan
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6
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Liao YK, Liu RS, Hu SF. Synergistic Effect of the Anode Interface of Garnet-Type All-Solid-State Batteries. ACS Appl Mater Interfaces 2023; 15:44413-44421. [PMID: 37683282 DOI: 10.1021/acsami.3c06527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/10/2023]
Abstract
Next-generation lithium-ion batteries must have high energy density and safety, making the development of all-solid-state batteries imperative. One of the biggest advantages of an all-solid-state lithium-ion battery (ASSLIB) is that its alloy uses lithium metal as an anode while ignoring its flammability and other dangers. Herein, high-conductivity garnet-type Li6.75La3Zr1.75Ta0.25O12 (LLZTO) was chosen as the solid electrolyte part of an all-solid-state battery. A composite anode was formed by melting Li and MXene-MAX together, reducing the interface impedance from 566 to 55 Ω cm2. The Li-MXene|LLZTO|LFP full battery displayed a high initial discharge capacity of 163.0 mAh g-1 and a Coulombic efficiency of 97.0% and maintained 90.2% of its discharge capacity over 100 cycles, but it did not maintain a good overpotential. Therefore, the synergistic effect of Li-MXene-Pt will highly improve the performance of the full battery because of its high initial discharge capacity of 150.0 mAh g-1 and Coulombic efficiency of 95.5%, discharge capacity maintained at 93.3% over 100 cycles, and low overpotential of 0.04 V.
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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Liao YK, Lagostina V, Salvadori E, Hartmann M, Poeppl A, Chiesa M. Short-Range Electronic Interactions between Vanadium and Molybdenum in Bimetallic SAPO-5 Catalysts Revealed by Hyperfine Spectroscopy. J Phys Chem C Nanomater Interfaces 2023; 127:11103-11110. [PMID: 37342203 PMCID: PMC10278125 DOI: 10.1021/acs.jpcc.3c01817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 05/16/2023] [Indexed: 06/22/2023]
Abstract
Engineering two cooperative sites into a catalyst implies the onset of synergistic effects related to the existence of short-range electronic interactions between two metal components. However, these interactions and the relative structure-property correlations are often difficult to obtain. Here we show that hyperfine spectroscopy has the potential to reveal the presence of V4+-O-Mo6+ linkages assessing the degree of spin density transfer from paramagnetic V4+ species to proximal oxo-bridged Mo6+ metal ions. The dimer species were prepared by adsorption of Mo(CO)6 in the pores of SAPO-5, followed by thermal decomposition and oxidation and subsequent grafting of anhydrous VCl4(g) followed by hydrolysis and dehydration. The metal species react with SAPO protons during the exchange process and generate new Lewis acid sites, which act as redox centers. X- and Q-band EPR and HYSCORE experiments have been employed to monitor the local environment of V4+ species obtaining direct evidence for spin delocalization over 27Al, 31P, 95Mo, and 97Mo nuclei, demonstrating the presence of bimetallic V-O-Mo well-defined structures.
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Affiliation(s)
- Yu-Kai Liao
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy
- Felix
Bloch Institute for Solid State Physics, Leipzig University, Linnéstr. 5, 04103 Leipzig, Germany
| | - Valeria Lagostina
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy
| | - Enrico Salvadori
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy
| | - Martin Hartmann
- Erlangen
Center for Interface Research and Catalysis (ECRC), FAU Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Andreas Poeppl
- Felix
Bloch Institute for Solid State Physics, Leipzig University, Linnéstr. 5, 04103 Leipzig, Germany
| | - Mario Chiesa
- Department
of Chemistry and NIS Centre of Excellence, University of Turin, via Giuria 9, 10125 Torino, Italy
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Liao YK, Tong Z, Liu SA, Huang JH, Liu RS, Hu SF. Spontaneous In Situ Formation of Lithium Metal Nitride in the Interface of Garnet-Type Solid-State Electrolyte by Tuning of Molten Lithium. ACS Appl Mater Interfaces 2023; 15:10283-10291. [PMID: 36757360 DOI: 10.1021/acsami.2c21618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
All-solid-state lithium-ion batteries (ASSLIBs) have attracted much attention owing to their high energy density and safety and are known as the most promising next-generation LIBs. The biggest advantage of ASSLIBs is that it can use lithium metal as the anode without any safety concerns. This study used a high-conductivity garnet-type solid electrolyte (Li6.75La3Zr1.75Ta0.25O12, LLZTO) and Li-Ga-N composite anode synthesized by mixing melted Li with GaN. The interfacial resistance was reduced from 589 to 21 Ω cm2, the symmetry cell was stably cycled for 1000 h at a current density of 0.1 mA cm-2 at room temperature, and the voltage range only changed from ±30 to ±40 mV. The full cell of Li-Ga-N|LLZTO|LFP exhibited a high first-cycle discharge capacity of 152.2 mAh g-1 and Coulombic efficiency of 96.5% and still maintained a discharge capacity retention of 91.2% after 100 cycles. This study also demonstrated that Li-Ga-N had been shown as two layers. Li3N shows more inclined to be closer to the LLZTO side. This method can help researchers understand what interface improvements can occur to enhance the performance of all-solid-state batteries in the future.
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shin-An Liu
- CPC Corporation, Taiwan, Kaohsiung 811, Taiwan
| | | | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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9
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Liao YK, Tong Z, Fang CC, Liao SC, Chen JM, Liu RS, Hu SF. Extensively Reducing Interfacial Resistance by the Ultrathin Pt Layer between the Garnet-Type Solid-State Electrolyte and Li-Metal Anode. ACS Appl Mater Interfaces 2021; 13:56181-56190. [PMID: 34784188 DOI: 10.1021/acsami.1c16922] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
All-solid-state Li-ion batteries (ASSLIBs), also known as next-generation batteries, have attracted much attention due to their high energy density and safety. The best advantage of ASSLIBs is the Li-metal anodes that could be used without safety issues. In this study, a highly conductive garnet solid electrolyte (Li6.75La3Zr1.75Ta0.25O12, LLZTO) was used in the ASSLIB, and a Pt film was used to modify the surface of LLZTO to prove the solution of the Li-metal anode for LLZTO. Li-Pt alloy was synthesized to improve the wettability and contact of the interface. The interfacial resistance was reduced by 21 times, at only 9 Ω cm2. The symmetric cell could stably cycle over 3500 h at a current density of 0.1 mA cm-2. The full cell of Li|Li-Pt|LLZTO|LiFePO4 and Li|Li-Pt|LLZTO|LiMn0.8Fe0.2PO4 achieved high stability in terms of battery performance. Point-to-point contact transformed into homogeneous surface contact made the Li-ion flux faster and more stable. This surface modification method could provide researchers with a new choice for fixing interface issues and promoting the application of high-performance ASSLIBs in the future.
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Affiliation(s)
- Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Chia-Chen Fang
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Shih-Chieh Liao
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Jin-Ming Chen
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
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Liao YK, Bruzzese PC, Hartmann M, Pöppl A, Chiesa M. Chromium Environment within Cr-Doped Silico-Aluminophosphate Molecular Sieves from Spin Density Studies. J Phys Chem C Nanomater Interfaces 2021; 125:8116-8124. [PMID: 34084260 PMCID: PMC8162410 DOI: 10.1021/acs.jpcc.0c09484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 03/22/2021] [Indexed: 06/12/2023]
Abstract
X-/Q-band electron paramagnetic resonance (EPR) and hyperfine sublevel correlation (HYSCORE) spectroscopies have been employed, in conjunction with density functional theory (DFT) modeling, to determine the location of Cr5+ions in SAPO-5 zeotype materials. The interaction of the unpaired electron of the paramagnetic Cr5+ species with 27Al could be resolved, allowing for the first detailed structural analysis of Cr5+ paramagnetic ions in SAPO materials. The interpretation of the experimental results is corroborated by DFT modeling, which affords a microscopic description of the system investigated. The EPR-active species is found to be consistent with isolated Cr5+ species isomorphously substituted in the framework at P5+ sites.
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Affiliation(s)
- Yu-Kai Liao
- Dipartimento
di Chimica, Università di Torino
and NIS Centre, Via Pietro Giuria 7, 10125 Torino, Italy
- Felix
Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Paolo Cleto Bruzzese
- Dipartimento
di Chimica, Università di Torino
and NIS Centre, Via Pietro Giuria 7, 10125 Torino, Italy
- Felix
Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Martin Hartmann
- Erlangen
Center for Interface Research and Catalysis (ECRC), Egerlandstr. 3, 91058 Erlangen, Germany
| | - Andreas Pöppl
- Felix
Bloch Institute for Solid State Physics, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Mario Chiesa
- Dipartimento
di Chimica, Università di Torino
and NIS Centre, Via Pietro Giuria 7, 10125 Torino, Italy
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11
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Tong Z, Wang SB, Liao YK, Hu SF, Liu RS. Interface Between Solid-State Electrolytes and Li-Metal Anodes: Issues, Materials, and Processing Routes. ACS Appl Mater Interfaces 2020; 12:47181-47196. [PMID: 33030017 DOI: 10.1021/acsami.0c13591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Li metal, which has a high theoretical capacity and negative electrochemical potential, is regarded as the "holy grail" in Li-ion batteries. However, the flammable nature of liquid electrolyte leads to safety issues. Hence, the cooperation of solid-state electrolyte and Li-metal anode is demanded. However, the short cycle life induced by interfacial issues is the main challenge faced by their cooperation. In this review, dendrite and interfacial side reactions are comprehensively analyzed as the main interfacial problems. Meanwhile, the "state-of-the-art" interphase materials are summarized. The challenges faced by each kind of material are underscored. Moreover, different processing routes to fabricate artificial interphase are also investigated from an engineering perspective. The processing routes suitable for mass production are also underscored.
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Affiliation(s)
- Zizheng Tong
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Shu-Bo Wang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Yu-Kai Liao
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Shu-Fen Hu
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Ru-Shi Liu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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12
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Chen YC, Lai YS, Shyu DJH, Chang YW, Chen ZR, Liao YK, Pang CT, Chang KT. C-Terminal Part of Glutamate-Ammonia-Ligase Adenyltransferase Gene Identified by RAPD-HRM with 3H Primer for E. Coli Screening. Folia Biol (Praha) 2019; 65:88-100. [PMID: 31464184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A single random oligonucleotide 3H primer has been previously applied in random-amplified- polymorphic-DNA (RAPD)-PCR to distinguish stocked bacteria E. coli within a cocktail mixture also containing Enterococcus faecalis, Bifidobacterium longum and Ruminococcus gnavus. In this study, we demonstrate that a 702 base pair (bp) gene fragment can be amplified as a unique pattern by RAPD-PCR using a 3H primer in human faeces containing E. coli. This unique 702 bp amplicon contained a 687 bp gene fragment identified as the C-terminal region of the glutamate-ammonia-ligase adenyltransferase (glnE) gene of E. coli. By high-resolution melt (HRM) analysis, a mean melt-curve temperature of this 702 bp amplicon was determined to be approximately 88.1 ± 0.22 degrees Celsius (°C). A combination of RAPD with HRM in one single reaction based on this amplicon can achieve semi-quantitative detection of up to 102 CFU/ml of E. coli. To increase the signal intensity of HRM, a primer pair capable of screening E. coli directly from fresh human faeces was re-designed from the 687 bp gene segment, giving a mean peak melt-curve temperature at 88.35 ± 0.11 °C. Finally, single-nucleotide polymorphisms of this 687 bp gene segment were analysed for pathogenic E. coli strains, including UMN026, O83:H1, O104:H4, O157:H7 and O169:H41. We conclude that this 687 bp segment of the glnE gene has a high potential for screening of human faecal E. coli, including pathogenic strains, in contaminated food and water.
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Affiliation(s)
- Y C Chen
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Y S Lai
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Center for Animal Biologics, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - D J H Shyu
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Y W Chang
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Z R Chen
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Y K Liao
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - C T Pang
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - K T Chang
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Flow Cytometry Center, Precision Instruments Center, Office of Research and Development, National Pingtung University of Science and Technology, Pingtung, Taiwan
- Research Center for Animal Biologics, National Pingtung University of Science and Technology, Pingtung, Taiwan
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13
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Affiliation(s)
- Yen-Hsiu Liao
- Department of Radiology, School of Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Yi-Ping Lo
- Department of Radiology, School of Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Yu-Kai Liao
- Department of Radiology, School of Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Chien-Hung Lin
- Department of Radiology, School of Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan
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14
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So EC, Huang YM, Hsing CH, Liao YK, Wu SN. Arecoline inhibits intermediate-conductance calcium-activated potassium channels in human glioblastoma cell lines. Eur J Pharmacol 2015; 758:177-87. [PMID: 25843414 DOI: 10.1016/j.ejphar.2015.03.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/18/2015] [Accepted: 03/25/2015] [Indexed: 12/14/2022]
Abstract
Arecoline (ARE) is an alkaloid-type natural product from areca nut. This compound has numerous pharmacological and toxicological effects. Whether this agent interacts with ion channels to perturb functional activity of cells remains unknown. The effects of ARE on ionic currents were studied in glioma cell lines (U373 and U87MG) using patch-clamp technique. Like TRAM-34(1-[(2-chlorophenyl)-diphenylmethyl]pyrazole), ARE suppressed the amplitude of whole-cell voltage-gated K(+) currents in U373 cells elicited by a ramp voltage clamp. In cell-attached configuration, ARE did not modify the single-channel conductance of intermediate-conductance Ca(2+)-activated K(+) (IKCa) channels; however, it did reduce channel activity. Its inhibition of IKCa channels was accompanied by a significant lengthening in the slow component of mean closed time of IKCa channels. Based on minimal kinetic scheme, the dissociation constant (KD) required for ARE-mediated prolongation of mean closed time was 11.2µM. ARE-induced inhibition of IKCa channels was voltage-dependent. Inability of ARE to perturb the activity of large-conductance Ca(2+)-activated K(+) (BKCa) channels was seen. Under current-clamp recordings, ARE depolarized the membrane of U373 cells and DCEBIO reversed ARE-induced depolarization. Similarly, ARE suppressed IKCa-channel activities in oral keratinocytes. This study provides the evidence that ARE block IKCa channels in a concentration, voltage and state-dependent manner. ARE-induced block of IKCa channels is unrelated to the binding of muscarinic receptors. The effects of ARE on these channels may partially be responsible for the underlying cellular mechanisms by which it influences the functional activities of glioma cells or oral keratinocytes, if similar findings occur in vivo.
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Affiliation(s)
- Edmund Cheung So
- Department of Anesthesia & Medical Research, China Medical University - An Nan Hospital, Tainan City, Taiwan; Department of Anesthesia, China Medical University, Taichung City, Taiwan; Department of Anesthesia, Nan Shan branch of Gilu Hospital, Shandong University, Shandong Province, PR China
| | - Yan-Ming Huang
- Department of Physiology, National Cheng Kung University Medical College, No. 1 University Road, Tainan City 70101, Taiwan
| | - Chung-Hsi Hsing
- Department of Anesthesia, Chi Mei Medical Center, Tainan City, Taiwan
| | - Yu-Kai Liao
- Department of Physiology, National Cheng Kung University Medical College, No. 1 University Road, Tainan City 70101, Taiwan
| | - Sheng-Nan Wu
- Department of Physiology, National Cheng Kung University Medical College, No. 1 University Road, Tainan City 70101, Taiwan.
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15
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Hsu CK, Tzeng SY, Yang CC, Lee JYY, Huang LLH, Chen WR, Hughes M, Chen YW, Liao YK, Tseng SH. Non-invasive evaluation of therapeutic response in keloid scar using diffuse reflectance spectroscopy. Biomed Opt Express 2015; 6:390-404. [PMID: 25780731 PMCID: PMC4354586 DOI: 10.1364/boe.6.000390] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/15/2014] [Accepted: 01/02/2015] [Indexed: 05/31/2023]
Abstract
The pathogenesis and ideal treatment of keloid are still largely unknown, and it is essential to develop an objective assessment of keloid severity to evaluate the therapeutic response. We previously reported that our diffuse reflectance spectroscopy (DRS) system could assist clinicians in understanding the functional and structural condition of keloid scars. The purpose of this study was to understand clinical applicability of our DRS system on evaluating the scar severity and therapeutic response of keloid. We analyzed 228 spectral data from 71 subjects with keloid scars. The scars were classified into mild (0-3), moderate (4-7) and severe (8-11) according to the Vancouver scar scale. We found that as the severity of the scar increased, collagen concentration and water content increased, and the reduced scattering coefficient at 800 nm and oxygen saturation (SaO2) decreased. Using the DRS system, we found that collagen bundles aligned in a specific direction in keloid scars, but not in normal scars. Water content and SaO2 may be utilized as reliable parameters for evaluating the therapeutic response of keloid. In conclusion, the results obtained here suggest that the DRS has potential as an objective technique with which to evaluate keloid scar severity. In addition, it may be useful as a tool with which to track longitudinal response of scars in response to various therapeutic interventions.
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Affiliation(s)
- Chao-Kai Hsu
- Department of Dermatology, National Cheng Kung University College of Medicine and Hospital, Tainan 701,
Taiwan
- Institute of Clinical Medicine, National Cheng Kung University College of Medicine and Hospital, Tainan 701,
Taiwan
- International Research Center of Wound Repair and Regeneration, National Cheng Kung University, Tainan 701,
Taiwan
- These authors contributed equally to this work and should be considered co-first authors
| | - Shih-Yu Tzeng
- Department of Photonics, National Cheng-Kung University, Tainan 701,
Taiwan
- Advanced Optoelectronic Technology Center, National Cheng-Kung University, Tainan 701,
Taiwan
- These authors contributed equally to this work and should be considered co-first authors
| | - Chao-Chun Yang
- Department of Dermatology, National Cheng Kung University College of Medicine and Hospital, Tainan 701,
Taiwan
- Institute of Clinical Medicine, National Cheng Kung University College of Medicine and Hospital, Tainan 701,
Taiwan
- International Research Center of Wound Repair and Regeneration, National Cheng Kung University, Tainan 701,
Taiwan
| | - Julia Yu-Yun Lee
- Department of Dermatology, National Cheng Kung University College of Medicine and Hospital, Tainan 701,
Taiwan
- International Research Center of Wound Repair and Regeneration, National Cheng Kung University, Tainan 701,
Taiwan
| | | | - Wan-Rung Chen
- Department of Dermatology, National Cheng Kung University College of Medicine and Hospital, Tainan 701,
Taiwan
| | - Michael Hughes
- International Research Center of Wound Repair and Regeneration, National Cheng Kung University, Tainan 701,
Taiwan
| | - Yu-Wen Chen
- Department of Photonics, National Cheng-Kung University, Tainan 701,
Taiwan
- Advanced Optoelectronic Technology Center, National Cheng-Kung University, Tainan 701,
Taiwan
| | - Yu-Kai Liao
- Department of Photonics, National Cheng-Kung University, Tainan 701,
Taiwan
- Advanced Optoelectronic Technology Center, National Cheng-Kung University, Tainan 701,
Taiwan
| | - Sheng-Hao Tseng
- Department of Photonics, National Cheng-Kung University, Tainan 701,
Taiwan
- Advanced Optoelectronic Technology Center, National Cheng-Kung University, Tainan 701,
Taiwan
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16
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Wu SN, So EC, Liao YK, Huang YM. Reversal by ranolazine of doxorubicin-induced prolongation in the inactivation of late sodium current in rat dorsal root ganglion neurons. Pain Med 2015; 16:1032-4. [PMID: 25586663 DOI: 10.1111/pme.12681] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Sheng-Nan Wu
- Department of Physiology, National Cheng Kung University Medical College, Tainan City, Taiwan
| | - Edmund Cheung So
- Department of Anesthesia & Medical Research, China Medical University-An Nan Hospital, Tainan City, Taiwan
| | - Yu-Kai Liao
- Department of Physiology, National Cheng Kung University Medical College, Tainan City, Taiwan
| | - Yen-Ming Huang
- Department of Physiology, National Cheng Kung University Medical College, Tainan City, Taiwan
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17
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Wu SN, Huang YM, Liao YK. Effects of ibandronate sodium, a nitrogen-containing bisphosphonate, on intermediate-conductance calcium-activated potassium channels in osteoclast precursor cells (RAW 264.7). J Membr Biol 2014; 248:103-15. [PMID: 25362532 DOI: 10.1007/s00232-014-9747-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Accepted: 10/23/2014] [Indexed: 01/08/2023]
Abstract
Ibanonate sodium (Iban), a nitrogen-containing bisphosphonate, is recognized to reduce skeletal complications through an inhibition of osteoclast-mediated bone resorption. However, how this drug interacts with ion channels in osteoclasts and creates anti-osteoclastic activity remains largely unclear. In this study, we investigated the possible effects of Iban and other related compounds on ionic currents in the osteoclast precursor RAW 264.7 cells. Iban suppressed the amplitude of whole-cell K(+) currents (I K) in a concentration-dependent manner with an IC50 value of 28.9 μM. The I K amplitude was sensitive to block by TRAM-34 and Iban-mediated inhibition of I K was reversed by further addition of DCEBIO, an activator of intermediate-conductance Ca(2+)-activated K(+) (IKCa) channels. Intracellular dialysis with Iban diminished I K amplitude and further addition of ionomycin reversed its inhibition. In 17β-estradiol-treated cells, Iban-mediated inhibition of I K remained effective. In cell-attached current recordings, Iban applied to bath did not modify single-channel conductance of IKCa channels; however, it did reduce channel activity. Iban-induced inhibition of IKCa channels was voltage-dependent. As IKCa-channel activity was suppressed by KN-93, subsequent addition of Iban did not further decrease the channel open probability. Iban could not exert any effect on inwardly rectifying K(+) current in RAW 264.7 cells. Under current-clamp recordings, Iban depolarized the membrane of RAW 264.7 cells and DCEBIO reversed Iban-induced depolarization. Iban also suppressed lipopolysaccharide-stimulated migration of RAW 264.7 cells in a concentration-dependent manner. Therefore, the inhibition by Iban of IKCa channels would be an important mechanism underlying its actions on the functional activity of osteoclasts occurring in vivo.
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Affiliation(s)
- Sheng-Nan Wu
- Department of Physiology, National Cheng Kung University Medical College, No. 1 University Road, Tainan City, 70101, Taiwan,
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18
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Liao YK, Tseng SH. Reliable recovery of the optical properties of multi-layer turbid media by iteratively using a layered diffusion model at multiple source-detector separations. Biomed Opt Express 2014; 5:975-89. [PMID: 24688828 PMCID: PMC3959844 DOI: 10.1364/boe.5.000975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 02/09/2014] [Accepted: 02/21/2014] [Indexed: 05/13/2023]
Abstract
Accurately determining the optical properties of multi-layer turbid media using a layered diffusion model is often a difficult task and could be an ill-posed problem. In this study, an iterative algorithm was proposed for solving such problems. This algorithm employed a layered diffusion model to calculate the optical properties of a layered sample at several source-detector separations (SDSs). The optical properties determined at various SDSs were mutually referenced to complete one round of iteration and the optical properties were gradually revised in further iterations until a set of stable optical properties was obtained. We evaluated the performance of the proposed method using frequency domain Monte Carlo simulations and found that the method could robustly recover the layered sample properties with various layer thickness and optical property settings. It is expected that this algorithm can work with photon transport models in frequency and time domain for various applications, such as determination of subcutaneous fat or muscle optical properties and monitoring the hemodynamics of muscle.
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Affiliation(s)
- Yu-Kai Liao
- Department of Photonics, National Cheng-Kung University, Tainan 701, Taiwan
| | - Sheng-Hao Tseng
- Department of Photonics, National Cheng-Kung University, Tainan 701, Taiwan
- Advanced Optoelectronic Technology Center, National Cheng-Kung University, Tainan 701, Taiwan
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19
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Huang CW, Hung TY, Liao YK, Hsu MC, Wu SN. Underlying mechanism of regulatory actions of diclofenac, a nonsteroidal anti-inflammatory agent, on neuronal potassium channels and firing: an experimental and theoretical study. J Physiol Pharmacol 2013; 64:269-280. [PMID: 23959723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 06/27/2013] [Indexed: 06/02/2023]
Abstract
Diclofenac (DIC), a nonsteroidal anti-inflammatory drug, is known to exert anti-nociceptive and anti-convulsant actions; however, its effects on ion currents, in neurons remain debatable. We aimed to investigate (1) potential effects of diclofenac on membrane potential and potassium currents in differentiated NSC-34 neuronal cells and dorsal root ganglion (DRG) neurons with whole-cell patch-clamp technology, and (2) firing of action potentials (APs), using a simulation model from hippocampal CA1 pyramidal neurons based on diclofenac's effects on potassium currents. In the NSC-34 cells, diclofenac exerted an inhibitory effect on delayed-rectifier K⁺ current (I(KDR)) with an IC₅₀ value of 73 μM. Diclofenac not merely inhibited the I(KDR) amplitude in response to membrane depolarization, but also accelerated the process of current inactivation. The inhibition by diclofenac of IK(DR) was not reversed by subsequent application of either naloxone. Importantly, diclofenac (300 μM) increased the amplitude of M-type K⁺ current (I)(KM)), while flupirtine (10 μM) or meclofenamic acid (10 μM) enhanced it effectively. Consistently, diclofenac (100 μM) increased the amplitude of I(KM) and diminished the I(KDR) amplitude, with a shortening of inactivation time constant in DRG neurons. Furthermore, by using the simulation modeling, we demonstrated the potential electrophysiological mechanisms underlying changes in AP firing caused by diclofenac. During the exposure to diclofenac, the actions on both I(KM) and I(KDR) could be potential mechanism through which it influences the excitability of fast-spiking neurons. Caution needs to be made in attributing the effects of diclofenac primarily to those produced by the activation of I(KM).
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Affiliation(s)
- C W Huang
- Department of Neurology, National Cheng Kung University Hospital, School of Medicine, National Cheng Kung University, Tainan City, Taiwan
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20
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Abstract
This study is to (1) investigate the prevalence of Chlamydophila abortus infection in cows and goats in Taiwan, and (2) compare the genetic properties of Taiwanese isolates with abortion strains from other sources. Approximately 71% of aborted cows and 58% of aborted does had IgG against C. abortus in their sera. The seroprevalence rate in cows may be overestimated, because a certain degree of cross-reactivity with C. pecorum cannot be ruled out. Only 22.7% (from aborted cows) and 33.3% (from aborted dogs) of vaginal swabs that tested positive by polymerase chain reaction led to successful isolation of C. abortus by inoculation into chicken embryos, equivalent to 7.1% and 7.9% of isolation rates, respectively. The major outer membrane protein gene of 15 Taiwanese abortion isolates was compared with that of various strains by restriction fragment length polymorphism (RFLP) and nucleotide sequencing. Restriction enzyme CfoI was able to distinguish Taiwanese ruminant isolates, which have identical RFLP patterns, from C. felis (feline) and C. psittaci (avian) strains. Taiwanese isolates had 98.8-100% homology with known ruminant abortion strains and were phylogenetically closest to bovine LW508 strain.
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Affiliation(s)
- F I Wang
- Department of Veterinary Medicine, National Taiwan University, Taipei
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21
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Abstract
Sick animals with excessive nasal discharges and protruding tongue as a result of dyspnea were observed in the August of 1996. Eight strains of BEF virus were isolated from heparinized blood samples of the affected cattle. Most of the affected cattle were difficult to be treated and had a poor prognosis. A total of 516 farms in the 9 districts of Taiwan were affected in 1996. Among a population of 110,247 dairy cattle, 14,993 (13.6%) cattle were found to be clinically ill. During the epidemic, 1,685 (11.3%) affected cattle were culled or dead after the onset of the disease. Furthermore, a strain of Ibaraki virus was isolated from the blood sample of a sick cattle that showed pyrexia, labored respiration and solitary behavior in the affected farm. The cattle with Ibaraki virus infection had typical symptoms of BEF at the early stage of the disease, but neither stomatitis nor pharyngoesophageal paralysis was observed at the onset of the disease. The outbreak was presumably brought about by the low level or non-immune status of a large cattle population due to the negligence of BEF vaccination. Therefore, the disease easily recurred in Taiwan after a typhoon episode in the August of 1996, which resulted in the proliferation of biting midges in the field. No difference in the antigenicty was found between the new and the previous isolates of BEF virus. As analyzed by cross neutralization test, the isolated BEF viruses showed no relationship to the Kimberley and Berrimah viruses that were isolated from the blood of cattle and related to BEF virus in Australia. We have tried to advise farmers that they must vaccinate their cattle annually to prevent BEF outbreak in the future.
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Affiliation(s)
- Y K Liao
- Taiwan Animal Health Research Institute, Tansui, Taiwan.
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22
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Chang CW, Liao YK, Su V, Farh L, Shiuan D. Nucleotide sequencing of S-RNA segment and sequence analysis of the nucleocapsid protein gene of the newly isolated Akabane virus PT-17 strain. Biochem Mol Biol Int 1998; 45:979-87. [PMID: 9739462 DOI: 10.1002/iub.7510450515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The nucleotide sequences of the S-RNA of Akabane viruses JaGAr-39, OBE-1, Iriki and the newly isolated PT-17 strains and the Aino virus were determined and compared. The results reveal that the S-RNAs of the four Akabane strains share 96.9% homology in nucleotide sequences. Only one amino acid difference out of the 233 amino acids of the nucleocapsid protein (N) and three amino acid differences in the 91 amino acids of the nonstructural protein (NSs) were found among the Akabane viruses. Amino acid sequences of N and NSs proteins of the Aino virus have approximately 80% identity as compared with the Akabane viruses. The results also demonstrate that the four Akabane viruses and the Aino virus can be clearly differentiated by RFLP (restriction fragments length polymorphism) analysis using RT-PCR generated nucleocapsid protein genes and digested with HaeIII and HindIII. The phylogenetic tree based on the UPGMA (Unweighted Pair Group Method with Arithmetic Mean) analysis of the sequences of nucleocapsid protein genes and the S-DNAs revealed that the newly isolated PT-17 strain is most closely related to Iriki strain, than the JaGAr-39 or OBE-1 strains.
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Affiliation(s)
- C W Chang
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan, ROC
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23
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Abstract
Epizootic abortion in goats has been frequently reported in Taiwan since 1993. The outbroken flocks were found in most of districts in Taiwan. No apparent clinical signs were found in aborted doe. The typical abortion occurred in the last two months of pregnancy. The incidence of abortion was from 10% to 87% in outbroken farms in 1993, and a total of 976 out of 2130 pregnancies (46%) were found abortion in our investigation. Gross lesions in aborted fetuses included generalized haemorrhage and swollen liver. Chlamydia psittaci was isolated from tissues of aborted fetuses and from vaginal swabs of aborted does. Chlamydial antibodies were detected among 67% to 100% of aborted does from epizootic flocks. The C. psittaci was diagnosed as the causal agent in enzootic abortion. This is the first report on chlamydial isolation and antibody surveys in epizootic abortion in goats in Taiwan.
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Affiliation(s)
- Y K Liao
- Taiwan Animal Health Research Institute, Tansui, Taiwan
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24
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Abstract
Nonsuppurative encephalitis in calves aged 4-12 months, cow abortion and fetal deformities were endemic in dairy farms in Taiwan in recent years. A virological investigation emphasizing on Arthpodborn virus (Arbovirus) was conducted. Total of 11 strains of Akabane virus were isolated from endemic districts between June and July of 1992. Among them, seven viruses were isolated from blood samples of 15 calves showing nervous signs. Another 4 Akabane viruses were isolated from clinically healthy calves from three of six dairy farms investigated. All the six investigated farms had a recent history of abortion and fetal deformities. The isolates caused prominent cytopathic effects in HmLu-1 cells and could reach a high virus titers (5 x 10(6) TCID50/ml). As demonstrated by a cross neutralization test, the isolates had identical antigenicity to Iriki strain of Akabane virus, but were antigenically more distant to JaGar-39 and OBE-1 strain of Akabane virus. This is the first report on the isolation of Akabane virus in Taiwan, and also the second report on the isolation of Iriki virus in the world.
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Affiliation(s)
- Y K Liao
- Taiwan Provincial Research Institute for Animal Health, Tansui
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25
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Lu YS, Lin DF, Lee YL, Liao YK, Tsai HJ. Infectious bill atrophy syndrome caused by parvovirus in a co-outbreak with duck viral hepatitis in ducklings in Taiwan. Avian Dis 1993; 37:591-6. [PMID: 8395811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In October 1989, an epizootic duckling disease with high mortality occurred in Taiwan. The disease was characterized by droopiness, inappetence, ataxia, ruffled feathers, and watery diarrhea. Affected ducklings were lame, were unable to stand, showed opisthotonos, and often died 3 or 4 days after the onset of the disease. Tolerant maturing ducklings displayed atrophic upper bills with a protruding tongue and became stunted as they reached maturity. No diagnostic histopathologic lesions were found in these ducklings. Fourteen parvovirus isolates, 33 duck viral hepatitis virus (DVHV) isolates, two adenovirus isolates, and two reovirus isolates were obtained and identified from more than 500 sick ducklings in the epizootic. The epizootic was diagnosed as a co-outbreak of duck parvovirus infections and duck viral hepatitis. The high mortality in ducklings and the bill atrophy syndrome were reproduced in ducklings by inoculating the parvovirus isolates alone. The epizootic was controlled by an emergency immunization program of ducklings with sera collected from recovered ducks or a bivalent inactivated vaccine composed of local DVHV and parvovirus isolates.
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Affiliation(s)
- Y S Lu
- Department of Epidemiology, Taiwan Provincial Research Institute for Animal Health, Taipei, Republic of China
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Zhou ZJ, Lin AP, Zhou XD, Liao YK. [A comparative identification of four Gynostemma spp. herbs and their various species from Guangxi]. Zhongguo Zhong Yao Za Zhi 1989; 14:202-6, 253. [PMID: 2505800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In this paper, the authors have described the morphological and histological character of the four herbs of Gynostemma spp. and their confused species from Guangxi viz Gynostemma pentaphyllum, G. guangxiense, G. laxum and G. longipes, and their confused species of four Hemsleya daxienensis, H. chinensis, Cayratia japonica and C. japonica var. pubifolia. The description is illustrated with line-drawings for comparative identification.
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