12 Result(s)
within
Suk-Ho Choi
English
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Article
Open AccessBlue-shifted and strongly-enhanced light emission in transition-metal dichalcogenide twisted heterobilayers
Moiré heterostructures produced by twisted heterojunction of transition-metal dichalcogenides are recognized as novel platforms for unique and tunable means of controlling the optical phenomena including photo...
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Article
Open AccessPossible permanent Dirac- to Weyl-semimetal phase transition by ion implantation
Three-dimensional (3D) topological semimetals (TSMs) are a new class of Dirac materials that can be viewed as 3D graphene and are referred to as Dirac semimetals (DSMs) or Weyl semimetals (WSMs) depending on w...
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Open AccessGrowth of two-dimensional Janus MoSSe by a single in situ process without initial or follow-up treatments
Two-dimensional (2D) Janus transition metal dichalcogenides (TMDCs) are highly attractive as an emerging class of 2D materials, but only a few methods are available for fabricating them. These methods rely on ...
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Open AccessPhysicochemical changes during 4 weeks ripening of Camembert cheeses salted with four types of salts
The objectives of this study were to compare physicochemical, rheological and sensory characteristics of Camembert cheeses salted with 4 types of salts (refined salt, baked refined salt, sun-dried salt, and Hi...
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Open AccessInAs on GaAs Photodetectors Using Thin InAlAs Graded Buffers and Their Application to Exceeding Short-Wave Infrared Imaging at 300 K
Short-wave infrared (SWIR) detectors and emitters have a high potential value in several fields of applications, including the internet of things (IoT) and advanced driver assistance systems (ADAS), gas sensin...
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Open AccessPrecise and selective sensing of DNA-DNA hybridization by graphene/Si-nanowires diode-type biosensors
Single-Si-nanowire (NW)-based DNA sensors have been recently developed, but their sensitivity is very limited because of high noise signals, originating from small source-drain current of the single Si NW. Her...
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Open AccessLight-induced negative differential resistance in graphene/Si-quantum-dot tunneling diodes
One of the interesing tunneling phenomena is negative differential resistance (NDR), the basic principle of resonant-tunneling diodes. NDR has been utilized in various semiconductor devices such as frequency m...
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Open AccessEnergy transfer from an individual silica nanoparticle to graphene quantum dots and resulting enhancement of photodetector responsivity
Förster resonance energy transfer (FRET), referred to as the transfer of the photon energy absorbed in donor to acceptor, has received much attention as an important physical phenomenon for its potential appli...
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Open AccessCharacterization of airag collected in Ulaanbaatar, Mongolia with emphasis on isolated lactic acid bacteria
Airag, alcoholic sour-tasting beverage, has been traditionally prepared by Mongolian nomads who naturally ferment fresh mares’ milk. Biochemical and microbiological compositions of airag samples collected in U...
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Open AccessAnisotropic Terahertz Emission from Bi2Se3 Thin Films with Inclined Crystal Planes
We investigate the surface states of topological insulator (TI) Bi2Se3 thin films grown on Si nanocrystals and Al2O3 substrates by using terahertz (THz) emission spectroscopy. Compared to bulk crystalline Bi2Te2S...
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Open AccessHigh-performance graphene-quantum-dot photodetectors
Graphene quantum dots (GQDs) have received much attention due to their novel phenomena of charge transport and light absorption/emission. The optical transitions are known to be available up to ~6 eV in GQDs, ...
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Open AccessGraphene/Si-nanowire heterostructure molecular sensors
Wafer-scale graphene/Si-nanowire (Si-NW) array heterostructures for molecular sensing have been fabricated by vertically contacting single-layer graphene with high-density Si NWs. Graphene is grown in large sc...
