H
Hwa Seob Choi
Researcher at National University of Singapore
Publications - 5
Citations - 287
Hwa Seob Choi is an academic researcher from National University of Singapore. The author has contributed to research in topics: Ferroelectricity & Coercivity. The author has an hindex of 3, co-authored 3 publications receiving 116 citations. Previous affiliations of Hwa Seob Choi include Shenzhen University.
Papers
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Journal ArticleDOI
Ferroelectricity and Rashba Effect in a Two-Dimensional Dion-Jacobson Hybrid Organic-Inorganic Perovskite.
In-Hyeok Park,Qiannan Zhang,Ki Chang Kwon,Ziyu Zhu,Wei Yu,Kai Leng,David Giovanni,Hwa Seob Choi,Ibrahim Abdelwahab,Qing-Hua Xu,Tze Chien Sum,Kian Ping Loh +11 more
TL;DR: The observation of robust ferroelectricity and Rashba effect in two-dimensional Dion-Jacobson perovskites is reported.
Journal ArticleDOI
In-Plane Ferroelectric Tin Monosulfide and Its Application in a Ferroelectric Analog Synaptic Device.
Ki Chang Kwon,Ki Chang Kwon,Yishu Zhang,Lin Wang,Wei Yu,Xiaojie Wang,In-Hyeok Park,Hwa Seob Choi,Hwa Seob Choi,Teng Ma,Ziyu Zhu,Bingbing Tian,Chenliang Su,Kian Ping Loh,Kian Ping Loh +14 more
TL;DR: It is demonstrated that Tin monosulfide films less than 6 nm thick shows optimum performance as semiconductor channel in in-plane ferro electric analogue synaptic device, whereas thicker films have much poorer ferroelectric response due to screening effects by a higher concentration of charge carriers.
Journal ArticleDOI
Rapid, Scalable Construction of Highly Crystalline Acylhydrazone Two-Dimensional Covalent Organic Frameworks via Dipole-Induced Antiparallel Stacking.
Xing Li,Jingsi Qiao,See Wee Chee,Hai-Sen Xu,Xiaoxu Zhao,Hwa Seob Choi,Wei Yu,Su Ying Quek,Utkur Mirsaidov,Kian Ping Loh +9 more
TL;DR: This work demonstrates a scalable, robust method to produce highly crystalline acylhydrazone two-dimensional (2D) COFs with diversified structures under open and stirred conditions, with growth typically completed in only 30 mins.
Journal ArticleDOI
Tailoring the coercive field in ferroelectric metal-free perovskites by hydrogen bonding
Hwa Seob Choi,Shunning Li,In-Hyeok Park,Weng Heng Liew,Ziyu Zhu,Ki Chang Kwon,Lin Wang,In-Hwan Oh,Shisheng Zheng,Chenliang Su,Qing-Hua Xu,Kui-Cheng Yao,Feng Pan,Kian Ping Loh +13 more
TL;DR: In this article , the coercive field of metal-free perovskite MDABCO-NH4-(PF6)3 was shown to be one order larger than inorganic perovsites owing to the stronger intermolecular hydrogen bonding in the former.
Journal ArticleDOI
Tailoring the coercive field in ferroelectric metal-free perovskites by hydrogen bonding
Hwa Seob Choi,Shunning Li,In-Hyeok Park,Weng Heng Liew,Ziyu Zhu,Ki Chang Kwon,Lin Wang,In-Hwan Oh,Shisheng Zheng,Chenliang Su,Qing-Hua Xu,Kui-Cheng Yao,Feng Pan,Kian Ping Loh +13 more
TL;DR: In this paper , the coercive field of metal-free perovskite MDABCO-NH4-(PF6)3 was shown to be one order larger than inorganic perovsites owing to the stronger intermolecular hydrogen bonding in the former.