H
Hyeunseok Choi
Researcher at University of California, Berkeley
Publications - 5
Citations - 529
Hyeunseok Choi is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Engineering & Chemistry. The author has an hindex of 2, co-authored 3 publications receiving 479 citations. Previous affiliations of Hyeunseok Choi include KITECH.
Papers
More filters
Journal ArticleDOI
Spherical hyperlens for two-dimensional sub-diffractional imaging at visible frequencies
Junsuk Rho,Ziliang Ye,Yi Xiong,Xiaobo Yin,Xiaobo Yin,Zhaowei Liu,Zhaowei Liu,Hyeunseok Choi,Guy Bartal,Xiang Zhang,Xiang Zhang +10 more
TL;DR: The spherical hyperlens is designed with flat hyperbolic dispersion that supports wave propagation with very large spatial frequency and yet same phase speed, which allows it to resolve features down to 160 nm, much smaller than the diffraction limit at visible wavelengths.
Journal ArticleDOI
Compressing surface plasmons for nano-scale optical focusing
TL;DR: This work experimentally demonstrate and quantitatively measure the nanofocusing of surface plasmon polaritons in tapered metallic V-grooves down to the deep subwavelength scale - approximately lambda/40 at wavelength of 1.5 micron - with almost 50% power efficiency.
Journal ArticleDOI
Facile Fabrication of ZnO-ZnFe2O4 Hollow Nanostructure by a One-Needle Syringe Electrospinning Method for a High-Selective H2S Gas Sensor
TL;DR: The good potential of p-n junction ZnO-ZnFe2O4 on H2S detection and affords a promising sensor design for a high-performance gas sensor is shown.
Journal ArticleDOI
Two-Dimensional calcium silicate nanosheets for trapping atmospheric water molecules in humidity-immune gas sensors.
Young Ju Cho,Yong Jung Kwon,Sung Tae Jin,Hyeunseok Choi,Jung-Hoon Lee,Seung-Min Yang,Sun-Woo Choi,Young Kyu Jeong +7 more
TL;DR: In this article , a two-dimensional calcium silicate (CS) nanosheet was used as a water-trapping layer in SnO2 nanowires to improve the gas detection performance.
Journal ArticleDOI
Placement of alkanethiol-capped Au nanoparticles using organic solvents.
TL;DR: It is reported that alkanethiol-capped Au nanoparticles can be linearly placed by toluene with its physical properties as well as its wettability in the presence of the nanoparticles.