Duck Young Chung - Publications

Affiliations: 
2006- Materials Science Division Argonne National Laboratory, Lemont, IL, United States 
Area:
solid state chemistry, materials science

65 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2023 De Siena MC, Klepov VV, Stepanoff SP, Bayikadi KS, Pan L, Pandey IR, Karki S, Chung DY, Wolfe DE, Kanatzidis MG. Extreme γ-Ray Radiation Tolerance of Spectrometer-Grade CsPbBr Perovskite Detectors. Advanced Materials (Deerfield Beach, Fla.). e2303244. PMID 37285797 DOI: 10.1002/adma.202303244  0.336
2023 Klepov VV, De Siena MC, Pandey IR, Pan L, Bayikadi KS, Butun S, Chung DY, Kanatzidis MG. Laser Scribing for Electrode Patterning of Perovskite Spectrometer-Grade CsPbBr Gamma-ray Detectors. Acs Applied Materials & Interfaces. PMID 36961964 DOI: 10.1021/acsami.3c01212  0.338
2023 Pan L, Liu Z, Welton C, Klepov V, Peters JA, De Siena M, Benadia A, Pandey I, Miceli A, Chung DY, Reddy GNM, Wessels BW, Kanatzidis MG. Ultra-High Flux X-Ray Detection by Solution-Grown Perovskite CsPbBr Single Crystal Semiconductor Detector. Advanced Materials (Deerfield Beach, Fla.). e2211840. PMID 36943095 DOI: 10.1002/adma.202211840  0.412
2023 Zhou X, Wilfong B, Chen X, Laing C, Pandey IR, Chen YP, Chen YS, Chung DY, Kanatzidis MG. Sr(Ag1-xLix)2Se2 and [Sr3Se2][(Ag1-xLix)2Se2] Tunable Direct Band Gap Semiconductors. Angewandte Chemie (International Ed. in English). PMID 36705521 DOI: 10.1002/anie.202301191  0.385
2022 Zhou X, Kolluru VSC, Xu W, Wang L, Chang T, Chen YS, Yu L, Wen J, Chan MKY, Chung DY, Kanatzidis MG. Discovery of chalcogenides structures and compositions using mixed fluxes. Nature. PMID 36352229 DOI: 10.1038/s41586-022-05307-7  0.466
2022 Cheng M, Iyer AK, Zhou X, Tyner A, Liu Y, Shehzad MA, Goswami P, Chung DY, Kanatzidis MG, Dravid VP. Tuning the Structural and Magnetic Properties in Mixed Cation MnCoPS. Inorganic Chemistry. PMID 35998562 DOI: 10.1021/acs.inorgchem.2c01116  0.671
2022 Chen H, McClain R, Shen J, He J, Malliakas CD, Spanopoulos I, Zhang C, Zhao C, Wang Y, Li Q, Chung DY, Su X, Huang F, Kwok WK, Wolverton C, et al. 2D Homologous Series SrFMBiS (M = Pb, AgBi; = 0, 1) and Commensurately Modulated SrFBiS. Inorganic Chemistry. PMID 35580355 DOI: 10.1021/acs.inorgchem.2c00663  0.778
2021 Lin W, He J, Su X, Zhang X, Xia Y, Bailey TP, Stoumpos CC, Tan G, Rettie AJE, Chung DY, Dravid VP, Uher C, Wolverton C, Kanatzidis MG. Ultralow Thermal Conductivity, Multiband Electronic Structure and High Thermoelectric Figure of Merit in TlCuSe. Advanced Materials (Deerfield Beach, Fla.). e2104908. PMID 34523151 DOI: 10.1002/adma.202104908  0.486
2021 Zhou X, Mandia DJ, Park H, Balasubramanian M, Yu L, Wen J, Yakovenko A, Chung DY, Kanatzidis MG. New Compounds and Phase Selection of Nickel Sulfides via Oxidation State Control in Molten Hydroxides. Journal of the American Chemical Society. PMID 34410691 DOI: 10.1021/jacs.1c05107  0.462
2021 Rettie AJE, Ding J, Zhou X, Johnson MJ, Malliakas CD, Osti NC, Chung DY, Osborn R, Delaire O, Rosenkranz S, Kanatzidis MG. A two-dimensional type I superionic conductor. Nature Materials. PMID 34294884 DOI: 10.1038/s41563-021-01053-9  0.621
2021 Bao JK, Bugaris DE, Zheng H, Chung DY, Kanatzidis MG. A Noncentrosymmetric Polymorph of LuRuGe. Inorganic Chemistry. PMID 33998812 DOI: 10.1021/acs.inorgchem.1c00320  0.806
2021 Cai W, He J, Li H, Zhang R, Zhang D, Chung DY, Bhowmick T, Wolverton C, Kanatzidis MG, Deemyad S. Pressure-induced ferroelectric-like transition creates a polar metal in defect antiperovskites HgTeX (X = Cl, Br). Nature Communications. 12: 1509. PMID 33686062 DOI: 10.1038/s41467-021-21836-7  0.4
2021 He Y, Stoumpos CC, Hadar I, Luo Z, McCall KM, Liu Z, Chung DY, Wessels BW, Kanatzidis MG. Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl Perovskite Semiconductor. Journal of the American Chemical Society. PMID 33492148 DOI: 10.1021/jacs.0c12254  0.81
2020 Ning W, Bao J, Puttisong Y, Moro F, Kobera L, Shimono S, Wang L, Ji F, Cuartero M, Kawaguchi S, Abbrent S, Ishibashi H, De Marco R, Bouianova IA, Crespo GA, ... ... Chung DY, et al. Magnetizing lead-free halide double perovskites. Science Advances. 6. PMID 33158858 DOI: 10.1126/sciadv.abb5381  0.424
2020 Slade TJ, Pal K, Grovogui JA, Bailey TP, Male J, Khoury JF, Zhou X, Chung DY, Snyder GJ, Uher C, Dravid VP, Wolverton C, Kanatzidis MG. Contrasting SnTe-NaSbTe and SnTe-NaBiTe Thermoelectric Alloys: High Performance Facilitated by Increased Cation Vacancies and Lattice Softening. Journal of the American Chemical Society. PMID 32628474 DOI: 10.1021/Jacs.0C05650  0.79
2020 Khoury JF, Rettie AJE, Robredo I, Krogstad MJ, Malliakas CD, Bergara A, Vergniory MG, Osborn R, Rosenkranz S, Chung DY, Kanatzidis MG. The subchalcogenides IrInQ (Q = S, Se, Te): Dirac semimetal candidates with re-entrant structural modulation. Journal of the American Chemical Society. PMID 32160464 DOI: 10.1021/Jacs.0C00809  0.813
2020 Chica DG, He Y, McCall KM, Chung DY, Pak RO, Trimarchi G, Liu Z, De Lurgio PM, Wessels BW, Kanatzidis MG. Publisher Correction: Direct thermal neutron detection by the 2D semiconductor LiInPSe. Nature. PMID 32112062 DOI: 10.1038/S41586-020-2065-7  0.683
2020 Chica DG, He Y, McCall KM, Chung DY, Pak RO, Trimarchi G, Liu Z, De Lurgio PM, Wessels BW, Kanatzidis MG. Direct thermal neutron detection by the 2D semiconductor LiInPSe. Nature. 577: 346-349. PMID 31942050 DOI: 10.1038/S41586-019-1886-8  0.722
2019 Khoury JF, Rettie AJE, Khan MA, Ghimire NJ, Robredo I, Pfluger JE, Pal K, Wolverton C, Bergara A, Jiang JS, Schoop LM, Vergniory MG, Mitchell JF, Chung DY, Kanatzidis MG. A new three-dimensional subsulfide IrInS with Dirac semimetal behavior. Journal of the American Chemical Society. PMID 31697089 DOI: 10.1021/Jacs.9B10147  0.8
2019 Chen H, McClain R, He J, Zhang C, Olding JN, Reis RD, Bao JK, Hadar I, Spanopoulos I, Malliakas CD, He Y, Chung DY, Kwok WK, Weiss EA, Dravid VP, et al. Antiferromagnetic Semiconductor BaFMn0.5Te with Unique Mn Ordering and Red Photoluminescence. Journal of the American Chemical Society. PMID 31589035 DOI: 10.1021/Jacs.9B09382  0.786
2019 Jung HJ, Bao JK, Chung DY, Kanatzidis MG, Dravid VP. Unconventional Defects in a Quasi-One-Dimension KMnBi. Nano Letters. PMID 31512881 DOI: 10.1021/Acs.Nanolett.9B03237  0.757
2019 Rettie AJE, Malliakas CD, Botana AS, Bao JK, Chung DY, Kanatzidis MG. KCuP: A Two-Dimensional Noncentrosymmetric Metallic Pnictide. Inorganic Chemistry. PMID 31306005 DOI: 10.1021/Acs.Inorgchem.9B01336  0.82
2019 Xu J, Wu F, Bao JK, Han F, Xiao ZL, Martin I, Lyu YY, Wang YL, Chung DY, Li M, Zhang W, Pearson JE, Jiang JS, Kanatzidis MG, Kwok WK. Orbital-flop Induced Magnetoresistance Anisotropy in Rare Earth Monopnictide CeSb. Nature Communications. 10: 2875. PMID 31253766 DOI: 10.1038/S41467-019-10624-Z  0.754
2019 Chen H, He J, Malliakas CD, Stoumpos CC, Rettie AJE, Bao JK, Chung DY, Kwok WK, Wolverton C, Kanatzidis MG. A Natural 2D Heterostructure [Pb3.1Sb0.9S4][AuxTe2-x] with Large Transverse Non-saturating Negative Magnetoresistance and High Electron Mobility. Journal of the American Chemical Society. PMID 30974936 DOI: 10.1021/Jacs.9B02599  0.795
2019 Hanus R, Agne MT, Rettie AJE, Chen Z, Tan G, Chung DY, Kanatzidis MG, Pei Y, Voorhees PW, Snyder GJ. Lattice Softening Significantly Reduces Thermal Conductivity and Leads to High Thermoelectric Efficiency. Advanced Materials (Deerfield Beach, Fla.). e1900108. PMID 30968467 DOI: 10.1002/Adma.201900108  0.383
2018 Chen H, Rodrigues JNB, Rettie AJE, Song TB, Chica DG, Su X, Bao JK, Chung DY, Kwok WK, Wagner LK, Kanatzidis MG. High Hole Mobility and Nonsaturating Giant Magnetoresistance in the New 2D Metal NaCu4Se4 Synthesized by a Unique Pathway. Journal of the American Chemical Society. PMID 30537833 DOI: 10.1021/Jacs.8B11911  0.793
2018 Islam SM, Peng L, Zeng L, Malliakas CD, Chung DY, Buchholz DB, Chasapis T, Li R, Chrissafis K, Medvedeva JE, Trimarchi GG, Grayson M, Marks TJ, Bedzyk MJ, Chang RPH, et al. Multi-States and Polyamorphism in Phase Change K2Sb8Se13. Journal of the American Chemical Society. PMID 29956935 DOI: 10.1021/Jacs.8B05542  0.638
2018 Rettie AJE, Malliakas CD, Sanchez Botana A, Hodges JM, Han F, Huang R, Chung DY, Kanatzidis MG. AgSe to KAgSe: Suppressing order-disorder transitions via reduced dimensionality. Journal of the American Chemical Society. PMID 29947508 DOI: 10.1021/Jacs.8B04888  0.804
2018 He Y, Matei L, Jung HJ, McCall KM, Chen M, Stoumpos CC, Liu Z, Peters JA, Chung DY, Wessels BW, Wasielewski MR, Dravid VP, Burger A, Kanatzidis MG. High spectral resolution of gamma-rays at room temperature by perovskite CsPbBr single crystals. Nature Communications. 9: 1609. PMID 29686385 DOI: 10.1038/S41467-018-04073-3  0.742
2018 Malliakas C, Chung DY, Claus H, Kanatzidis MG. Superconductivity in the 2-Dimensional Homologous Series AMmBi3Q5+m (m = 1, 2) (A = Rb, Cs; M = Pb, Sn; Q = Se, Te). Chemistry (Weinheim An Der Bergstrasse, Germany). PMID 29527755 DOI: 10.1002/Chem.201800883  0.568
2018 Bao JK, Tang ZT, Jung HJ, Liu JY, Liu Y, Li L, Li YK, Xu ZA, Feng CM, Chen H, Chung DY, Dravid VP, Cao GH, Kanatzidis MG. Unique [MnBi]nanowires in KMnBi: a quasi-one-dimensional antiferromagnetic metal. Journal of the American Chemical Society. PMID 29494136 DOI: 10.1021/Jacs.8B00465  0.795
2017 Bugaris DE, Malliakas CD, Bud'ko SL, Calta NP, Chung DY, Kanatzidis MG. Flux Crystal Growth of the RE2Ru3Ge5 (RE = La, Ce, Nd, Gd, Tb) Series and Their Magnetic and Metamagnetic Transitions. Inorganic Chemistry. PMID 29160701 DOI: 10.1021/Acs.Inorgchem.7B02389  0.653
2017 Chen H, Narayan A, Stoumpos CC, Zhao J, Han F, Chung DY, Wagner LK, Kwok WK, Kanatzidis MG. Semiconducting Ba3Sn3Sb4 and Metallic Ba7-xSn11Sb15-y (x = 0.4, y = 0.6) Zintl Phases. Inorganic Chemistry. PMID 29116790 DOI: 10.1021/Acs.Inorgchem.7B02352  0.489
2017 Chen H, Malliakas CD, Narayan A, Fang L, Chung DY, Wagner LK, Kwok WK, Kanatzidis MG. Charge Density Wave and Narrow Energy Gap at Room Temperature in 2D Pb3-xSb1+xS4Te2-δ with Square Te Sheets. Journal of the American Chemical Society. PMID 28715187 DOI: 10.1021/Jacs.7B06446  0.655
2017 Reyes-Martinez MA, Abdelhady AL, Saidaminov MI, Chung DY, Bakr OM, Kanatzidis MG, Soboyejo WO, Loo YL. Time-Dependent Mechanical Response of APbX3 (A = Cs, CH3 NH3 ; X = I, Br) Single Crystals. Advanced Materials (Deerfield Beach, Fla.). PMID 28464367 DOI: 10.1002/Adma.201606556  0.375
2017 Bugaris DE, Malliakas CD, Han F, Calta NP, Sturza M, Krogstad M, Osborn R, Rosenkranz S, Ruff JP, Trimarchi G, Bud'ko SL, Balasubramanian M, Chung DY, Kanatzidis MG. Charge Density Wave in the New Polymorphs of RE2Ru3Ge5 (RE = Pr, Sm, Dy). Journal of the American Chemical Society. PMID 28206753 DOI: 10.1021/Jacs.7B00284  0.679
2016 Calta NP, Im J, Fang L, Chasapis TC, Bugaris DE, Chung DY, Kwok WK, Kanatzidis MG. Hybridization Gap in the Semiconducting Compound SrIr4In2Ge4. Inorganic Chemistry. 55: 12477-12481. PMID 27934417 DOI: 10.1021/Acs.Inorgchem.6B02617  0.481
2016 Malliakas CD, Chung DY, Claus H, Kanatzidis MG. Superconductivity in the narrow gap semiconductor RbBi11/3Te6. Journal of the American Chemical Society. PMID 27744685 DOI: 10.1021/Jacs.6B08732  0.668
2016 Sturza M, Bugaris DE, Malliakas CD, Han F, Chung DY, Kanatzidis MG. Mixed-Valent NaCu4Se3: A Two-Dimensional Metal. Inorganic Chemistry. PMID 27143407 DOI: 10.1021/Acs.Inorgchem.6B00400  0.684
2016 Han F, Liu H, Malliakas CD, Sturza M, Chung DY, Wan X, Kanatzidis MG. La1-xBi1+xS3 (x ≈ 0.08): An n-Type Semiconductor. Inorganic Chemistry. PMID 26998638 DOI: 10.1021/Acs.Inorgchem.6B00025  0.658
2016 Calta NP, L Bud'ko S, Rodriguez AP, Han F, Chung DY, Kanatzidis MG. Synthesis, Structure, and Complex Magnetism of MIr2In8 (M = Eu, Sr). Inorganic Chemistry. PMID 26949815 DOI: 10.1021/Acs.Inorgchem.6B00059  0.507
2016 Bugaris DE, Malliakas CD, Chung DY, Kanatzidis MG. Metallic Borides, La2Re3B7 and La3Re2B5, Featuring Extensive Boron-Boron Bonding. Inorganic Chemistry. PMID 26812202 DOI: 10.1021/Acs.Inorgchem.5B02599  0.648
2015 Bugaris DE, Han F, Im J, Chung DY, Freeman AJ, Kanatzidis MG. Crystal Growth, Structures, and Properties of the Complex Borides, LaOs2Al2B and La2Os2AlB2. Inorganic Chemistry. 54: 8049-57. PMID 26241801 DOI: 10.1021/Acs.Inorgchem.5B01275  0.496
2015 Fang L, Im J, Stoumpos CC, Shi F, Dravid V, Leroux M, Freeman AJ, Kwok WK, Chung DY, Kanatzidis M. Two-dimensional mineral [Pb2BiS3][AuTe2]: high-mobility charge carriers in single-atom-thick layers. Journal of the American Chemical Society. 137: 2311-7. PMID 25612093 DOI: 10.1021/Ja5111688  0.486
2014 Sturza M, Malliakas CD, Bugaris DE, Han F, Chung DY, Kanatzidis MG. NaCu6Se4: a layered compound with mixed valency and metallic properties. Inorganic Chemistry. 53: 12191-8. PMID 25360672 DOI: 10.1021/Ic502137M  0.686
2014 Bugaris DE, Malliakas CD, Shoemaker DP, Do DT, Chung DY, Mahanti SD, Kanatzidis MG. Crystal growth and characterization of the narrow-band-gap semiconductors OsPn₂ (Pn = P, As, Sb). Inorganic Chemistry. 53: 9959-68. PMID 25162930 DOI: 10.1021/Ic501733Z  0.656
2014 Shoemaker DP, Hu YJ, Chung DY, Halder GJ, Chupas PJ, Soderholm L, Mitchell JF, Kanatzidis MG. In situ studies of a platform for metastable inorganic crystal growth and materials discovery. Proceedings of the National Academy of Sciences of the United States of America. 111: 10922-7. PMID 25024201 DOI: 10.1073/Pnas.1406211111  0.422
2014 Lee Y, Lo SH, Chen C, Sun H, Chung DY, Chasapis TC, Uher C, Dravid VP, Kanatzidis MG. Contrasting role of antimony and bismuth dopants on the thermoelectric performance of lead selenide. Nature Communications. 5: 3640. PMID 24784991 DOI: 10.1038/Ncomms4640  0.595
2013 Wibowo AC, Malliakas CD, Chung DY, Im J, Freeman AJ, Kanatzidis MG. Thallium mercury chalcobromides, TlHg6Q4Br5 (Q = S, Se). Inorganic Chemistry. 52: 11875-80. PMID 24106977 DOI: 10.1021/Ic4014174  0.647
2013 Malliakas CD, Chung DY, Claus H, Kanatzidis MG. Superconductivity in the narrow-gap semiconductor CsBi4Te6. Journal of the American Chemical Society. 135: 14540-3. PMID 24028315 DOI: 10.1021/ja407530u  0.609
2013 Sturza M, Han F, Shoemaker DP, Malliakas CD, Chung DY, Jin H, Freeman AJ, Kanatzidis MG. NaBa2Cu3S5: a doped p-type degenerate semiconductor. Inorganic Chemistry. 52: 7210-7. PMID 23731247 DOI: 10.1021/Ic4008284  0.671
2013 Wibowo AC, Malliakas CD, Liu Z, Peters JA, Sebastian M, Chung DY, Wessels BW, Kanatzidis MG. Photoconductivity in the chalcohalide semiconductor, SbSeI: a new candidate for hard radiation detection. Inorganic Chemistry. 52: 7045-50. PMID 23713838 DOI: 10.1021/Ic401086R  0.653
2013 Lee Y, Lo SH, Androulakis J, Wu CI, Zhao LD, Chung DY, Hogan TP, Dravid VP, Kanatzidis MG. High-performance tellurium-free thermoelectrics: all-scale hierarchical structuring of p-type PbSe-MSe systems (M = Ca, Sr, Ba). Journal of the American Chemical Society. 135: 5152-60. PMID 23521562 DOI: 10.1021/Ja400069S  0.596
2013 Wibowo AC, Malliakas CD, Chung DY, Im J, Freeman AJ, Kanatzidis MG. Mercury bismuth chalcohalides, Hg3Q2Bi2Cl8 (Q = S, Se, Te): syntheses, crystal structures, band structures, and optical properties. Inorganic Chemistry. 52: 2973-9. PMID 23448152 DOI: 10.1021/Ic3023826  0.635
2012 Shoemaker DP, Chung DY, Mitchell JF, Bray TH, Soderholm L, Chupas PJ, Kanatzidis MG. Understanding fluxes as media for directed synthesis: in situ local structure of molten potassium polysulfides. Journal of the American Chemical Society. 134: 9456-63. PMID 22582976 DOI: 10.1021/Ja303047E  0.442
2011 Zhao LD, Lo SH, He J, Li H, Biswas K, Androulakis J, Wu CI, Hogan TP, Chung DY, Dravid VP, Kanatzidis MG. High performance thermoelectrics from earth-abundant materials: enhanced figure of merit in PbS by second phase nanostructures. Journal of the American Chemical Society. 133: 20476-87. PMID 22126301 DOI: 10.1021/Ja208658W  0.67
2011 Androulakis J, Todorov I, He J, Chung DY, Dravid V, Kanatzidis M. Thermoelectrics from abundant chemical elements: high-performance nanostructured PbSe-PbS. Journal of the American Chemical Society. 133: 10920-7. PMID 21650209 DOI: 10.1021/Ja203022C  0.753
2010 Rothenberger A, Wang HH, Chung D, Kanatzidis MG. Structural diversity by mixing chalcogen atoms in the chalcophosphate system K/In/P/Q (Q = S, Se). Inorganic Chemistry. 49: 1144-51. PMID 20030374 DOI: 10.1021/Ic902105J  0.393
2009 Sootsman JR, Chung DY, Kanatzidis MG. New and old concepts in thermoelectric materials. Angewandte Chemie (International Ed. in English). 48: 8616-39. PMID 19866458 DOI: 10.1002/Anie.200900598  0.724
2009 Rothenberger A, Morris C, Wang HH, Chung DY, Kanatzidis MG. Soft-hard acid-base interactions: probing coordination preferences of sulfur and selenium in mixed chalcophosphates in the family APbPS(4-x)Se(x) (A = K, Rb, Cs; x = 0-4). Inorganic Chemistry. 48: 9036-40. PMID 19708675 DOI: 10.1021/Ic901283K  0.661
2009 Todorov I, Chung DY, Ye L, Freeman AJ, Kanatzidis MG. Synthesis, structure and charge transport properties of Yb(5)Al(2)Sb(6): a zintl phase with incomplete electron transfer. Inorganic Chemistry. 48: 4768-76. PMID 19374366 DOI: 10.1021/Ic900035A  0.762
2009 Todorov I, Chung DY, Malliakas CD, Li Q, Bakas T, Douvalis A, Trimarchi G, Gray K, Mitchell JF, Freeman AJ, Kanatzidis MG. CaFe4As3: a metallic iron arsenide with anisotropic magnetic and charge-transport properties. Journal of the American Chemical Society. 131: 5405-7. PMID 19334680 DOI: 10.1021/Ja900534H  0.743
2006 Kim JH, Chung DY, Kanatzidis MG. A new chalcogenide homologous series A2[M(5+n)Se(9+n)] (A = Rb, Cs; M = Bi, Ag, Cd). Chemical Communications (Cambridge, England). 1628-30. PMID 16583001 DOI: 10.1039/B516790F  0.352
2004 Chung DY, Hogan TP, Rocci-Lane M, Brazis P, Ireland JR, Kannewurf CR, Bastea M, Uher C, Kanatzidis MG. A new thermoelectric material: CsBi4Te6. Journal of the American Chemical Society. 126: 6414-28. PMID 15149239 DOI: 10.1021/Ja039885F  0.502
2002 Hsu KF, Chung DY, Lal S, Mrotzek A, Kyratsi T, Hogan T, Kanatzidis MG. CsMBi(3)Te(6) and CsM(2)Bi(3)Te(7) (M = Pb, Sn): new thermoelectric compounds with low-dimensional structures. Journal of the American Chemical Society. 124: 2410-1. PMID 11890769 DOI: 10.1021/Ja017602I  0.447
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