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Hyo Ju Park
Ulsan National Institute of Science and Technology
Inorganic chemistryMaterials scienceBoron nitrideGrapheneMonolayer
24Publications
10H-index
319Citations
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Publications 27
Newest
Abstract Properties of metal elements can be modified by alloying. Given that catalytic efficiencies are often maximized using metal single-atoms (SAs), two immiscible metals can improve the catalytic activity when they can be present as non-agglomerated dual SAs. Here, we report yet-unexplored synthesis of high-performance electrocatalysts utilizing immiscibility of Cu/Ru bimetal atoms. In the synthesized electrocatalyst (Cu/Ru@GN), both Cu-SAs and Ru-SAs are dispersed on N-doped graphitic-matr...
1 CitationsSource
#1Hyo Ju Park (UNIST: Ulsan National Institute of Science and Technology)H-Index: 10
#2Janghwan Cha (Sejong University)H-Index: 4
Last. Zonghoon Lee (UNIST: Ulsan National Institute of Science and Technology)H-Index: 34
view all 9 authors...
Hexagonal boron nitride (hBN) is an insulating two-dimensional (2D) material with a large bandgap. Although known for its interfacing with other 2D materials and structural similarities to graphene, the potential use of hBN in 2D electronics is limited by its insulating nature. Here, we report atomically sharp twin boundaries at AA′/AB stacking boundaries in chemical vapor deposition–synthesized few-layer hBN. We find that the twin boundary is composed of a 6′6′ configuration, showing conducting...
Source
#1Ming Huang (UNIST: Ulsan National Institute of Science and Technology)H-Index: 22
#2Pavel V. BakharevH-Index: 2
Last. Rodney S. RuoffH-Index: 133
view all 17 authors...
High-quality AB-stacked bilayer or multilayer graphene larger than a centimetre has not been reported. Here, we report the fabrication and use of single-crystal Cu/Ni(111) alloy foils with controllable concentrations of Ni for the growth of large-area, high-quality AB-stacked bilayer and ABA-stacked trilayer graphene films by chemical vapour deposition. The stacking order, coverage and uniformity of the graphene films were evaluated by Raman spectroscopy and transmission electron microscopy incl...
3 CitationsSource
#1Jung Hwa KimH-Index: 8
#2Se-Yang KimH-Index: 5
Last. Zonghoon LeeH-Index: 34
view all 5 authors...
Source
#1Hyo Ju Park (UNIST: Ulsan National Institute of Science and Technology)H-Index: 10
#2Roland Yingjie Tay (NTU: Nanyang Technological University)H-Index: 15
Last. Zonghoon Lee (UNIST: Ulsan National Institute of Science and Technology)H-Index: 34
view all 9 authors...
Among the different growth mechanisms for two-dimensional (2D) hexagonal boron nitride (h-BN) synthesized using chemical vapor deposition, spiraling growth of h-BN has not been reported. Here we report the formation of intertwined double-spiral few-layer h-BN that is driven by screw dislocations located at the antiphase boundaries of monolayer domains. The microstructure and stacking configurations were studied using a combination of dark-field and atomic resolution transmission electron microsc...
Source
#1Jitendra N. Tiwari (UNIST: Ulsan National Institute of Science and Technology)H-Index: 19
#2Ahmad M. Harzandi (UNIST: Ulsan National Institute of Science and Technology)H-Index: 8
Last. Kwan Soo Kim (UNIST: Ulsan National Institute of Science and Technology)H-Index: 92
view all 16 authors...
Source
#1Jitendra N. Tiwari (UNIST: Ulsan National Institute of Science and Technology)H-Index: 19
#2Ahmad M. Harzandi (UNIST: Ulsan National Institute of Science and Technology)H-Index: 8
Last. Kwan Soo Kim (UNIST: Ulsan National Institute of Science and Technology)H-Index: 92
view all 16 authors...
3 CitationsSource
#1Jung Hwa Kim (UNIST: Ulsan National Institute of Science and Technology)H-Index: 8
#2Se-Yang Kim (UNIST: Ulsan National Institute of Science and Technology)H-Index: 5
Last. Zonghoon Lee (UNIST: Ulsan National Institute of Science and Technology)H-Index: 34
view all 7 authors...
Source
#1Jitendra N. Tiwari (UNIST: Ulsan National Institute of Science and Technology)H-Index: 19
#2Siraj Sultan (UNIST: Ulsan National Institute of Science and Technology)H-Index: 6
Last. Kwan Soo Kim (UNIST: Ulsan National Institute of Science and Technology)H-Index: 92
view all 18 authors...
Source
#1Hyo Ju Park (UNIST: Ulsan National Institute of Science and Technology)H-Index: 10
#2Zonghoon Lee (UNIST: Ulsan National Institute of Science and Technology)H-Index: 34
Source
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