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Susanto I, Liu HS, Ho YT, Yu IS. Epitaxial Growth of GaN Films on Chemical-Vapor-Deposited 2D MoS 2 Layers by Plasma-Assisted Molecular Beam Epitaxy. Nanomaterials (Basel) 2024; 14:732. [PMID: 38668226 PMCID: PMC11055084 DOI: 10.3390/nano14080732] [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: 03/22/2024] [Revised: 04/18/2024] [Accepted: 04/19/2024] [Indexed: 04/29/2024]
Abstract
The van der Waals epitaxy of wafer-scale GaN on 2D MoS2 and the integration of GaN/MoS2 heterostructures were investigated in this report. GaN films have been successfully grown on 2D MoS2 layers using three different Ga fluxes via a plasma-assisted molecular beam epitaxy (PA-MBE) system. The substrate for the growth was a few-layer 2D MoS2 deposited on sapphire using chemical vapor deposition (CVD). Three different Ga fluxes were provided by the gallium source of the K-cell at temperatures of 825, 875, and 925 °C, respectively. After the growth, RHEED, HR-XRD, and TEM were conducted to study the crystal structure of GaN films. The surface morphology was obtained using FE-SEM and AFM. Chemical composition was confirmed by XPS and EDS. Raman and PL spectra were carried out to investigate the optical properties of GaN films. According to the characterizations of GaN films, the van der Waals epitaxial growth mechanism of GaN films changed from 3D to 2D with the increase in Ga flux, provided by higher temperatures of the K-cell. GaN films grown at 750 °C for 3 h with a K-cell temperature of 925 °C demonstrated the greatest crystal quality, chemical composition, and optical properties. The heterostructure of 3D GaN on 2D MoS2 was integrated successfully using the low-temperature PA-MBE technique, which could be applied to novel electronics and optoelectronics.
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Affiliation(s)
- Iwan Susanto
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 974301, Taiwan; (I.S.)
- Department of Mechanical Engineering, Politeknik Negeri Jakarta, Depok 16424, Indonesia
| | - Hong-Shan Liu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 974301, Taiwan; (I.S.)
| | - Yen-Ten Ho
- International College of Semiconductor Technology, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan;
| | - Ing-Song Yu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 974301, Taiwan; (I.S.)
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Nurzal N, Hsu TY, Susanto I, Yu IS. Droplet epitaxy of InGaN quantum dots on Si (111) by plasma-assisted molecular beam epitaxy. Discov Nano 2023; 18:60. [PMID: 37382746 PMCID: PMC10409935 DOI: 10.1186/s11671-023-03844-2] [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: 03/09/2023] [Accepted: 03/31/2023] [Indexed: 06/30/2023]
Abstract
The droplet epitaxy of indium gallium nitride quantum dots (InGaN QDs), the formation of In-Ga alloy droplets in ultra-high vacuum and then surface nitridation by plasma treatment, is firstly investigated by using plasma-assisted molecular beam epitaxy. During the droplet epitaxy process, in-situ reflection high energy electron diffraction patterns performs the amorphous In-Ga alloy droplets transform to polycrystalline InGaN QDs, which are also confirmed by the characterizations of transmission electron microscopy and X-ray photoelectron spectroscopy. The substrate temperature, In-Ga droplet deposition time, and duration of nitridation are set as parameters to study the growth mechanism of InGaN QDs on Si. Self-assembled InGaN QDs with a density of 1.33 × 1011 cm-2 and an average size of 13.3 ± 3 nm can be obtained at the growth temperature of 350 °C. The photoluminescence emissions of uncapped InGaN QDs in wavelength of the visible red (715 nm) and infrared region (795 and 857 nm) are observed. The formation of high-indium composition of InGaN QDs via droplet epitaxy technique could be applied in long wavelength optoelectronic devices.
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Affiliation(s)
- Nurzal Nurzal
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan
- Department of Mechanical Engineering, Institut Teknologi Padang, Kp Olo Padang, 25143, Indonesia
| | - Ting-Yu Hsu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan
| | - Iwan Susanto
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan
- Department of Mechanical Engineering, Politeknik Negri Jakarta, Depok, 16424, Indonesia
| | - Ing-Song Yu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan.
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Peng FY, Wang PW, Liao W, Yu IS. Lignin Biopolymer for the Synthesis of Iron Nanoparticles and the Composite Applied for the Removal of Methylene Blue. Polymers (Basel) 2021; 13:3847. [PMID: 34771404 PMCID: PMC8588178 DOI: 10.3390/polym13213847] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/03/2021] [Accepted: 11/04/2021] [Indexed: 12/03/2022] Open
Abstract
In the current study, lignin, an abundant natural polymer, was dissolved in ethylene glycol and acidic H2O to form nanoscale lignin. Then, zero-valent iron (ZVI) nanoparticles were synthesized in nanoscale lignin, producing a nZVI/n-lignin composite, via the borohydride reduction method. The use of nZVI/n-lignin for environmental remediation was tested by the removal of methylene blue in aqueous solutions at room temperature. The nZVI/n-lignin composite achieved a higher methylene blue removal ratio than that achieved by traditional nZVIs. Moreover, its excellent dispersibility in water and stability against oxidation in the air were observed. The functions of the nanoscale lignin in the composite material are (1) prevention of further growth and aggregation of the nZVI nanoparticles, (2) protection of nZVI from serious oxidation by H2O/O2, and (3) allowing better dispersibility of nZVI in aqueous solutions. These three functions are important for the field applications of nZVI/n-lignin, namely, to travel long distances before making contact with environmental pollutants. The present method for producing nZVI/n-lignin is straightforward, and the combination of nZVI and lignin is an efficient and environmentally friendly material for environmental applications.
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Affiliation(s)
| | | | | | - Ing-Song Yu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan; (F.-Y.P.); (P.-W.W.); (W.L.)
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Hao YC, Nurzal N, Chien HH, Liao CY, Kuok FH, Yang CC, Chen JZ, Yu IS. Application of Atmospheric-Pressure-Plasma-Jet Modified Flexible Graphite Sheets in Reduced-Graphene-Oxide/Polyaniline Supercapacitors. Polymers (Basel) 2020; 12:E1228. [PMID: 32481643 PMCID: PMC7362246 DOI: 10.3390/polym12061228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/27/2020] [Accepted: 05/27/2020] [Indexed: 11/16/2022] Open
Abstract
In this study, flexible and low-cost graphite sheets modified by atmospheric pressure plasma jet are applied to reduced-graphene-oxide/polyaniline supercapacitors. Surface treatment by atmospheric pressure plasma jet can make the hydrophobic surface of graphite into a hydrophilic surface and improve the adhesion of the screen-printed reduced-graphene-oxide/polyaniline on the graphite sheets. After the fabrication of reduced-graphene-oxide/polyaniline supercapacitors with polyvinyl alcohol/H2SO4 gel electrolyte, pseudo-capacitance and electrical double capacitance can be clearly identified by the measurement of cyclic voltammetry. The fabricated supercapacitor exhibits specific capacitance value of 227.32 F/g and areal capacitance value of 28.37 mF/cm2 with a potential scan rate of 2 mV/s. Meanwhile, the capacitance retention rate can reach 86.9% after 1000-cycle cyclic voltammetry test. A light-emitting diode can be lit by the fabricated reduced-graphene-oxide/polyaniline supercapacitors, which confirms that the supercapacitors function well and can potentially be used in a circuit.
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Affiliation(s)
- Yu-Chuan Hao
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan; (Y.-C.H.); (N.N.)
| | - Nurzal Nurzal
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan; (Y.-C.H.); (N.N.)
| | - Hung-Hua Chien
- Graduate Institute of Applied Mechanics, National Taiwan University, Taipei City 10617, Taiwan; (H.-H.C.); (C.-Y.L.); (F.-H.K.)
| | - Chen-Yu Liao
- Graduate Institute of Applied Mechanics, National Taiwan University, Taipei City 10617, Taiwan; (H.-H.C.); (C.-Y.L.); (F.-H.K.)
| | - Fei-Hong Kuok
- Graduate Institute of Applied Mechanics, National Taiwan University, Taipei City 10617, Taiwan; (H.-H.C.); (C.-Y.L.); (F.-H.K.)
| | - Cheng-Chen Yang
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan;
| | - Jian-Zhang Chen
- Graduate Institute of Applied Mechanics, National Taiwan University, Taipei City 10617, Taiwan; (H.-H.C.); (C.-Y.L.); (F.-H.K.)
| | - Ing-Song Yu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan; (Y.-C.H.); (N.N.)
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Kuok FH, Chien HH, Lee CC, Hao YC, Yu IS, Hsu CC, Cheng IC, Chen JZ. Atmospheric-pressure-plasma-jet processed carbon nanotube (CNT)–reduced graphene oxide (rGO) nanocomposites for gel-electrolyte supercapacitors. RSC Adv 2018; 8:2851-2857. [PMID: 35541196 PMCID: PMC9077538 DOI: 10.1039/c7ra12108c] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 01/05/2018] [Indexed: 11/21/2022] Open
Abstract
This study evaluates DC-pulse nitrogen atmospheric-pressure-plasma-jet processed carbon nanotube (CNT)–reduced graphene oxide (rGO) nanocomposites for gel-electrolyte supercapacitor applications. X-ray photoelectron spectroscopy (XPS) indicates decreased oxygen content (mainly, C–O bonding content) after nitrogen APPJ processing owing to the oxidation and vaporization of ethyl cellulose. Nitrogen APPJ processing introduces nitrogen doping and improves the hydrophilicity of the CNT–rGO nanocomposites. Raman analysis indicates that nitrogen APPJ processing introduces defects and/or surface functional groups on the nanocomposites. The processed CNT–rGO nanocomposites on carbon cloth are applied to the electrodes of H2SO4–polyvinyl alcohol (PVA) gel-electrolyte supercapacitors. The best achieved specific (areal) capacitance is 93.1 F g−1 (9.1 mF cm−2) with 15 s APPJ-processed CNT–rGO nanocomposite electrodes, as evaluated by cyclic voltammetry under a potential scan rate of 2 mV s−1. The addition of rGOs in CNTs in the nanoporous electrodes improves the supercapacitor performance. This study demonstrates ultrafast (15 s) atmospheric-pressure-plasma-jet (APPJ) processed CNT–rGO nanocomposite gel-electrolyte supercapacitors.![]()
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Affiliation(s)
- Fei-Hong Kuok
- Graduate Institute of Applied Mechanics
- National Taiwan University
- Taipei City 10617
- Taiwan
| | - Hung-Hua Chien
- Graduate Institute of Applied Mechanics
- National Taiwan University
- Taipei City 10617
- Taiwan
| | - Chia-Chun Lee
- Graduate Institute of Applied Mechanics
- National Taiwan University
- Taipei City 10617
- Taiwan
| | - Yu-Chuan Hao
- Department of Materials Science and Engineering
- National Dong Hwa University
- Hualien 97401
- Taiwan
| | - Ing-Song Yu
- Department of Materials Science and Engineering
- National Dong Hwa University
- Hualien 97401
- Taiwan
| | - Cheng-Che Hsu
- Department of Chemical Engineering
- National Taiwan University
- Taipei City 10617
- Taiwan
| | - I-Chun Cheng
- Graduate Institute of Photonics and Optoelectronics
- Department of Electrical Engineering
- National Taiwan University
- Taipei City 10617
- Taiwan
| | - Jian-Zhang Chen
- Graduate Institute of Applied Mechanics
- National Taiwan University
- Taipei City 10617
- Taiwan
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Chen HJY, Yang DL, Huang TW, Yu IS. Formation and Temperature Effect of InN Nanodots by PA-MBE via Droplet Epitaxy Technique. Nanoscale Res Lett 2016; 11:241. [PMID: 27142879 PMCID: PMC4854854 DOI: 10.1186/s11671-016-1455-0] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 04/26/2016] [Indexed: 06/05/2023]
Abstract
In this report, self-organized indium nitride nanodots have been grown on Si (111) by droplet epitaxy method and their density can reach as high as 2.83 × 10(11) cm(-2) for the growth at low temperature of 250 °C. Based on the in situ reflection high-energy electron diffraction, the surface condition, indium droplets, and the formation of InN nanodots are identified during the epitaxy. The X-ray photoelectron spectroscopy and photoluminescence measurements have shown the formation of InN nanodots as well. The growth mechanism of InN nanodots could be described via the characterizations of indium droplets and InN nanodots using scanning electron microscopy, atomic force microscopy, and transmission electron microscopy. The density of the InN nanodots was less than that of the In droplets due to the surface diffusion and desorption of atoms during the nitridation and annealing process. The average size and density of InN nanodots can be controlled by the substrate temperatures during the growth. For the growth at lower temperature, we obtained the higher density and smaller average size of InN nanodots. To minimize the total surface energy, the coarsening and some preferred orientations of InN nanodots were observed for the growth at high temperature.
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Affiliation(s)
- Hugo Juin-Yu Chen
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, Republic of China
| | - Dian-Long Yang
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, Republic of China
| | - Tseh-Wet Huang
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, Republic of China
| | - Ing-Song Yu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien, 97401, Taiwan, Republic of China.
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Yu IS, Chang CP, Yang CP, Lin CT, Ma YR, Chen CC. Characterization and density control of GaN nanodots on Si (111) by droplet epitaxy using plasma-assisted molecular beam epitaxy. Nanoscale Res Lett 2014; 9:682. [PMID: 25593560 PMCID: PMC4275119 DOI: 10.1186/1556-276x-9-682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 12/12/2014] [Indexed: 06/04/2023]
Abstract
In this report, self-organized GaN nanodots have been grown on Si (111) by droplet epitaxy method, and their density can be controlled from 1.1 × 10(10) to 1.1 × 10(11) cm(-2) by various growth parameters, such as substrate temperatures for Ga droplet formation, the pre-nitridation treatment of Si substrate, the nitridation duration for GaN crystallization, and in situ annealing after GaN formation. Based on the characterization of in situ RHEED, we can observe the surface condition of Si and the formation of GaN nanodots on Si. The surface nitridaiton treatment at 600°C provides a-SiNx layer which makes higher density of GaN nanodots. Crystal GaN nanodots can be observed by the HRTEM. The surface composition of GaN nanodots can be analyzed by SPEM and μ-XPS with a synchrotron x-ray source. We can find GaN nanodots form by droplet epitaxy and then in situ annealing make higher-degree nitridation of GaN nanodots.
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Affiliation(s)
- Ing-Song Yu
- Department of Materials Science and Engineering, National Dong Hwa University, Hualien 97401, Taiwan
| | - Chun-Pu Chang
- Institute of Photonic System, National Chiao Tung University, Tainan 71150, Taiwan
| | - Chung-Pei Yang
- Institute of Photonic System, National Chiao Tung University, Tainan 71150, Taiwan
| | - Chun-Ting Lin
- Institute of Photonic System, National Chiao Tung University, Tainan 71150, Taiwan
| | - Yuan-Ron Ma
- Department of Physics, National Dong Hwa University, Hualien 97401, Taiwan
| | - Chun-Chi Chen
- National Nano Device Laboratories, Hsinchu 30078, Taiwan
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Mashanov V, Ulyanov V, Timofeev V, Nikiforov A, Pchelyakov O, Yu IS, Cheng H. Formation of Ge-Sn nanodots on Si(100) surfaces by molecular beam epitaxy. Nanoscale Res Lett 2011; 6:85. [PMID: 21711584 PMCID: PMC3212234 DOI: 10.1186/1556-276x-6-85] [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] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Accepted: 01/12/2011] [Indexed: 05/31/2023]
Abstract
The surface morphology of Ge0.96Sn0.04/Si(100) heterostructures grown at temperatures from 250 to 450°C by atomic force microscopy (AFM) and scanning tunnel microscopy (STM) ex situ has been studied. The statistical data for the density of Ge0.96Sn0.04 nanodots (ND) depending on their lateral size have been obtained. Maximum density of ND (6 × 1011 cm-2) with the average lateral size of 7 nm can be obtained at 250°C. Relying on the reflection of high energy electron diffraction, AFM, and STM, it is concluded that molecular beam growth of Ge1-xSnx heterostructures with the small concentrations of Sn in the range of substrate temperatures from 250 to 450°C follows the Stranski-Krastanow mechanism. Based on the technique of recording diffractometry of high energy electrons during the process of epitaxy, the wetting layer thickness of Ge0.96Sn0.04 films is found to depend on the temperature of the substrate.
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Affiliation(s)
- Vladimir Mashanov
- A.V. Rzhanov Institute of Semiconductor Physics SB RAS, Lavrentyev Avenue, 13, Novosibirsk 630090, Russia
| | - Vladimir Ulyanov
- A.V. Rzhanov Institute of Semiconductor Physics SB RAS, Lavrentyev Avenue, 13, Novosibirsk 630090, Russia
| | - Vyacheslav Timofeev
- A.V. Rzhanov Institute of Semiconductor Physics SB RAS, Lavrentyev Avenue, 13, Novosibirsk 630090, Russia
| | - Aleksandr Nikiforov
- A.V. Rzhanov Institute of Semiconductor Physics SB RAS, Lavrentyev Avenue, 13, Novosibirsk 630090, Russia
| | - Oleg Pchelyakov
- A.V. Rzhanov Institute of Semiconductor Physics SB RAS, Lavrentyev Avenue, 13, Novosibirsk 630090, Russia
| | - Ing-Song Yu
- Center for Condensed Matter Sciences and Graduate Institute of Electronic Engineering, National Taiwan University, Taipei, 106, Taiwan, R.O.C
| | - Henry Cheng
- Center for Condensed Matter Sciences and Graduate Institute of Electronic Engineering, National Taiwan University, Taipei, 106, Taiwan, R.O.C
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Yu IS, Chen HJ, Lee YS, Huang PH, Lin SR, Tsai TW, Lin SW. Mice deficient in hepsin, a serine protease, exhibit normal embryogenesis and unchanged hepatocyte regeneration ability. Thromb Haemost 2000; 84:865-70. [PMID: 11127869] [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: 02/18/2023]
Abstract
Hepsin, a liver-enriched novel serine protease, has been implicated in participating with normal cell growth, embryogenesis, and blood coagulation pathway. To study its function in vivo, we have disrupted the mouse hepsin gene by homologous recombination. Targeted disruption of the hepsin gene and ablation of hepsin message were demonstrated by Southern blotting, Northern blotting and RT-PCR analysis. Homozygous hepsin -/- mice were viable, fertile, and exhibited no gross abnormalities, as judged by the size, weight and blood coagulation (PT) assays. However, the serum concentration of the bone form of alkaline phosphatase, aspartate aminotransferase, and alanine aminotransferase of the hepsin -/- mice was mildly elevated, in spite of no obvious pathological change of hepatocytes. To examine whether hepsin is involved in controlling cell growth in adult tissues, 70% hepatectomy was applied to the hepsin -/- mice. Liver regeneration proceeded normally in the hepsin -/- mice as judged by the liver mass restoration rate. These results suggest that loss of hepsin function causes no effect in cell growth and embryogenesis in vivo, which is in contradiction to the studies using in vitro cell culturing system. Moreover, gross mass regeneration of liver after damage proceeds normally in the absence of functional hepsin.
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Affiliation(s)
- I S Yu
- Graduate Institute of Medical Technology, College of Medicine, National Taiwan University, Taipei
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Lin SR, Yu IS, Huang PH, Tsai CW, Lin SW. Chimaeric mice with disruption of the gene coding for phosphatidylinositol glycan class A (Pig-a) were defective in embryogenesis and spermatogenesis. Br J Haematol 2000; 110:682-93. [PMID: 10997981 DOI: 10.1046/j.1365-2141.2000.02209.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Mutations in the gene encoding PIG-A (phosphatidylinositol glycan class A) are found in patients with paroxysmal nocturnal haemoglobinuria (PNH), an acquired haematopoietic stem cell disorder. Individuals with hereditary PIG-A mutations have never been identified, which is also manifested by the difficulties in generating Pig-a knockout (KO) mice. This study investigated the effect of Pig-a mutations on the development of visceral and genital organs in addition to the haematopoietic system by the generation of Pig-a KO chimaeric mice. Of a total of 54 live births out of 1684 blastocysts injected, chimaerism for Pig-a knockout was detected in 29 mice, suggesting the importance of Pig-a in embryogenesis and in live birth. Quantification of the degree of chimaerism in different organs of the surviving chimaeric mice revealed extremely low levels of Pig-a KO cells in the liver and spleen. In contrast, high levels of KO signals were usually detected in the brain, heart, lung and kidney. Haematopoiesis proceeded normally in these chimaeric mice (as measured by 'complete blood cell counting') and the Pig-a KO cells were present at low levels in red blood cells and B lymphocytes but at high levels in T lymphocytes, although these KO cells did not gain any growth advantage. The effect of Pig-a knockout was also prominent in the reproductive system, another organ with high mitotic activity. Breeding the male chimaeras revealed a high rate of infertility and abnormality in the male genital organs, including abnormally shaped testes, epididymis and seminal vesicles. Even in the absence of gross abnormalities of the genital organs, low counts of motile sperm were also discernible. Pig-a KO sperm was detected in these organs; however, no transmission of the KO allele was observed. The results suggest a possible mechanism underlying the non-transmission of the Pig-a KO gene in germlines.
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Affiliation(s)
- S R Lin
- Institute of Molecular Medicine, Graduate Institute of Medical Technology, Department of Pathology, and Laboratory of Animal Centre, College of Medicine, National Taiwan University, Taipei, Taiwan, ROC
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Khim ZG, Lee SC, Lee JH, Suh BJ, Park YW, Park C, Yu IS, Park JC. Superconductivity in single-phase Y1Ba. Phys Rev B Condens Matter 1987; 36:2305-2307. [PMID: 9943084 DOI: 10.1103/physrevb.36.2305] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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