Heongkyu Ju
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View article: Advances in Silicon-Based UV Light Detection
Advances in Silicon-Based UV Light Detection Open
Silicon (Si), the cornerstone semiconductor in the micro-electronics industry, can provide a cost-efficient platform with mature technologies for photodetection in visible and near-infrared regions. However, its intrinsic properties, such …
View article: Recent Advancements in Photocatalytic Synthesis of Five Membered Nitrogen Heterocycles and Their Derivatives
Recent Advancements in Photocatalytic Synthesis of Five Membered Nitrogen Heterocycles and Their Derivatives Open
Photocatalytic synthesis of heterocycles has emerged as a versatile strategy in organic synthesis. Among various heterocycles, five membered heterocycles such as pyrroles, indoles and their derivatives have great significance based on thei…
View article: Smartphone-Assisted Plasmonic Nanosensor for Visual and Specific Sensing of Toxic Cyanide Ions by β−Cyclodextrin Templated Gold-Rich/Silver Bimetallic Alloy Nanoparticles
Smartphone-Assisted Plasmonic Nanosensor for Visual and Specific Sensing of Toxic Cyanide Ions by β−Cyclodextrin Templated Gold-Rich/Silver Bimetallic Alloy Nanoparticles Open
As cyanide ion (CN−), an ecologically harmful pollutant, has received incessant attention with growing industrialization on a global scale, the capability of on-site monitoring of CN− contamination becomes increasingly crucial. In this wor…
View article: Carbon Quantum Dots: Synthesis, Characteristics, and Quenching as Biocompatible Fluorescent Probes
Carbon Quantum Dots: Synthesis, Characteristics, and Quenching as Biocompatible Fluorescent Probes Open
Carbon quantum dots (CQDs), a new class of carbon-based nanomaterials, have emerged as nano-scaled probes with photoluminescence that have an eco-friendly and bio-compatible nature. Their cost-efficient synthesis and high photoluminescence…
View article: Recent Advances in Vanadate-Based Materials for Photocatalytic Hydrogen Production
Recent Advances in Vanadate-Based Materials for Photocatalytic Hydrogen Production Open
Metal vanadates are a developing group of semiconducting metal oxide materials that are gaining increasing attention due to their great redox potential, effective separation of photogenerated electron–hole pairs, and tunability of structur…
View article: Achieving low-voltage, fast-switching nematic liquid crystal devices via optimization of CdSe/CdS quantum rod concentration
Achieving low-voltage, fast-switching nematic liquid crystal devices via optimization of CdSe/CdS quantum rod concentration Open
View article: Development of Cerebellum HD-tDCS Montage Optimization Pipeline for Lobule-specific Stimulation
Development of Cerebellum HD-tDCS Montage Optimization Pipeline for Lobule-specific Stimulation Open
View article: Construction of Z-Scheme ZIF67/NiMoO4 Heterojunction for Enhanced Photocatalytic Degradation of Antibiotic Pollutants
Construction of Z-Scheme ZIF67/NiMoO4 Heterojunction for Enhanced Photocatalytic Degradation of Antibiotic Pollutants Open
The rational design of heterojunction photocatalysts enabling fast transportation and efficient separation of photoexcited charge carriers is the key element in visible light-driven photocatalyst systems. Herein, we develop a unique Z-sche…
View article: β-Cyclodextrin Functionalized Au@Ag Core-Shell Nanoparticles: Plasmonic Sensors for Cysteamine and Efficient Nanocatalysts for Nitrobenzene-to-Aniline Conversion
β-Cyclodextrin Functionalized Au@Ag Core-Shell Nanoparticles: Plasmonic Sensors for Cysteamine and Efficient Nanocatalysts for Nitrobenzene-to-Aniline Conversion Open
We reported the gold/silver core-shell nanoparticles (Aucore@Agshell NPs) functionalized with β-cyclodextrin (β-CD) as versatile nano-agents demonstrated for human urine-based biosensing of cysteamine and catalytic conversion from nitroben…
View article: Biocompatible bright orange emissive carbon dots: Multifunctional nanoprobes for highly specific sensing toxic Cr(VI) ions and mitochondrial targeting cancer cell imaging
Biocompatible bright orange emissive carbon dots: Multifunctional nanoprobes for highly specific sensing toxic Cr(VI) ions and mitochondrial targeting cancer cell imaging Open
Although several luminescent-based nanostructured materials are used as cellular imaging probes, creating a biocompatible subcellular imaging probe can be challenging. Instantaneously, it is crucial and urgently needed for certain fluoresc…
View article: Ultrahigh-Sensitivity Detection of 17β-Estradiol
Ultrahigh-Sensitivity Detection of 17β-Estradiol Open
17β-estradiol (E2), a vital female sex hormone, plays a crucial role in female reproductive cycles and secondary sexual characteristics. The quantification of E2 concentration in human blood and urine samples is essential because a deviati…
View article: Anomalous spectral shift of localized surface plasmon resonance
Anomalous spectral shift of localized surface plasmon resonance Open
We report the first observation of abnormal spectral shift of plasmon resonance of silver nanoparticles (AgNPs) due to a negative optical nonlinearity of a local ambient medium.
View article: Nitrogen- and Sulfur-Codoped Strong Green Fluorescent Carbon Dots for the Highly Specific Quantification of Quercetin in Food Samples
Nitrogen- and Sulfur-Codoped Strong Green Fluorescent Carbon Dots for the Highly Specific Quantification of Quercetin in Food Samples Open
Carbon dots (CDs) doped with heteroatoms have garnered significant interest due to their chemically modifiable luminescence properties. Herein, nitrogen- and sulfur-codoped carbon dots (NS-CDs) were successfully prepared using p-phenylened…
View article: Fluorescent carbon dots for highly sensitive bilirubin sensing with excellent selectivity
Fluorescent carbon dots for highly sensitive bilirubin sensing with excellent selectivity Open
We reported the fluorescence sensor of carbon dots (CDs) synthesized for the highly sensitive and selective detection of bilirubin in human urine. High-resolution transmission electron microscopy (HRTEM) images showed that the CDs have a s…
View article: Graphical Abstract: Angew. Chem. Int. Ed. 26/2023
Graphical Abstract: Angew. Chem. Int. Ed. 26/2023 Open
a nonequilibrium precipitation approach for the construction of a highly disordered crystal structure of layered double hydroxides as a model oxygen evolution catalyst.
View article: Highly Selective Uricase-Based Quantification of Uric Acid Using Hydrogen Peroxide Sensitive Poly-(vinylpyrrolidone) Templated Copper Nanoclusters as a Fluorescence Probe
Highly Selective Uricase-Based Quantification of Uric Acid Using Hydrogen Peroxide Sensitive Poly-(vinylpyrrolidone) Templated Copper Nanoclusters as a Fluorescence Probe Open
We reported on uric acid (UA) detection using a new fluorescence-based assay: poly-(vinylpyrrolidone) templated copper nanoclusters (PVP-CuNCs) with uricase in an aqueous medium, such as human urine with uricase. These nanoclusters were sy…
View article: Optical Sensing of Toxic Cyanide Anions Using Noble Metal Nanomaterials
Optical Sensing of Toxic Cyanide Anions Using Noble Metal Nanomaterials Open
Water toxicity, one of the major concerns for ecosystems and the health of humanity, is usually attributed to inorganic anions-induced contamination. Particularly, cyanide ions are considered one of the most harmful elements required to be…
View article: Recent Progress in the Core-Shell Nanostructures of the NiMoO4-Based Composite Materials for Supercapacitor Applications: A Comprehensive Review
Recent Progress in the Core-Shell Nanostructures of the NiMoO4-Based Composite Materials for Supercapacitor Applications: A Comprehensive Review Open
Supercapacitors have emerged as one of the promising energy storage systems owing to their rapid charge/discharge capability, long-term cycling stability, and high power density. The application of core-shell nanostructures for supercapaci…
View article: A Fully-Self-Adaptive Harmony Search GMDH-Type Neural Network Algorithm to Estimate Shear-Wave Velocity in Porous Media
A Fully-Self-Adaptive Harmony Search GMDH-Type Neural Network Algorithm to Estimate Shear-Wave Velocity in Porous Media Open
Shear wave velocity (VS) is one of the most important parameters in deep and surface studies and the estimation of geotechnical design parameters. This parameter is widely utilized to determine permeability and porosity, lithology, rock me…
View article: Quantum Dot-Induced Blue Shift of Surface Plasmon Spectroscopy
Quantum Dot-Induced Blue Shift of Surface Plasmon Spectroscopy Open
We experimentally demonstrate the spectral blue shift of surface plasmon resonance through the resonant coupling between quantum dots (QDs) and surface plasmons, surprisingly in contrast to the conventionally observed red shift of plasmon …
View article: Functionalized silver nanoparticles for SERS amplification with enhanced reproducibility and for ultrasensitive optical fiber sensing in environmental and biochemical assays
Functionalized silver nanoparticles for SERS amplification with enhanced reproducibility and for ultrasensitive optical fiber sensing in environmental and biochemical assays Open
Silver nanoparticles for SERS amplification with enhanced reproducibility and for ultrasensitive optical fiber sensing in a biochemical assay.
View article: Kramers–Kronig Relation for Attenuated Total Reflection from a Metal–Dielectric Interface Where Surface Plasmon Polaritons Are Excited
Kramers–Kronig Relation for Attenuated Total Reflection from a Metal–Dielectric Interface Where Surface Plasmon Polaritons Are Excited Open
The applicability of the Kramers–Kronig relation for attenuated total reflection (ATR) from a metal–dielectric interface that can excite surface plasmon polaritons (SPP) is theoretically investigated. The plasmon-induced attenuation of ref…
View article: Fluorescence Enhancement via Dual Coupling of Dye Molecules with Silver Nanostructures
Fluorescence Enhancement via Dual Coupling of Dye Molecules with Silver Nanostructures Open
We demonstrate the enhancement of fluorescence emitted from dye molecules coupled with two surface plasmons, i.e., silver nanoparticles (AgNPs)-induced localized surface plasmons (LSP) and thin silver (Ag) film supported surface plasmons. …
View article: Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation
Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation Open
We demonstrate magnetic control of optical reflectance with no ferromagnetic material via combining the Faraday rotation and the surface plasmon resonance (SPR) in a Kretschman configuration under magnetic fields < 0.5 T. The SPR produces …
View article: Electrical properties and stability of low temperature annealed (Zn,Cu) co-doped (Ni,Mn)<sub>3</sub>O<sub>4</sub> spinel thin films
Electrical properties and stability of low temperature annealed (Zn,Cu) co-doped (Ni,Mn)<sub>3</sub>O<sub>4</sub> spinel thin films Open
Toward the development of infrared (IR) detectors, nickel–manganite-based thin films were initially prepared from (Ni0.2Mn2.8–xCux)Cl2 (0.010 ≤ x ≤ 0.040) solutions using the liquid flow deposition (LFD) method. The influence of Cu on the …
View article: Fluorescence Based on Surface Plasmon Coupled Emission for Ultrahigh Sensitivity Immunoassay of Cardiac Troponin I
Fluorescence Based on Surface Plasmon Coupled Emission for Ultrahigh Sensitivity Immunoassay of Cardiac Troponin I Open
This work demonstrates the quantitative assay of cardiac Troponin I (cTnI), one of the key biomarkers for acute cardiovascular diseases (the leading cause of death worldwide) using the fluorescence-based sandwich immune reaction. Surface p…
View article: Solution Synthesis of Cubic Spinel Mn–Ni–Cu–O Thermistor Powder
Solution Synthesis of Cubic Spinel Mn–Ni–Cu–O Thermistor Powder Open
Toward the development of NTCR thermistors, nanocrystalline Mn–Ni–Cu–O powder was synthesized from a mixed chloride aqueous solution by a simple co-precipitation method.The introduction of an oxidizing agent (H2O2) into the solution led to…
View article: Graphical Abstract: Angew. Chem. Int. Ed. 2/2021
Graphical Abstract: Angew. Chem. Int. Ed. 2/2021 Open
Synthesis and bioactivity of guanidinium-functionalized pillar[5]arene are reported by Ruibing Wang et al. in their Communication on page 618. Metal-Organic FrameworksConfigurational entropy is revealed to play an important role in the pre…
View article: Manufacturing of Ti-48Al-2Cr-2Nb Alloy Turbocharger Turbine Wheel by Vacuum Centrifugal Casting
Manufacturing of Ti-48Al-2Cr-2Nb Alloy Turbocharger Turbine Wheel by Vacuum Centrifugal Casting Open
View article: Electrical and Optical Properties of Co75Si15B10 Metallic Glass Nanometric Thin Films
Electrical and Optical Properties of Co75Si15B10 Metallic Glass Nanometric Thin Films Open
Co-based (Co75Si15B10) thin-film metallic glass (TFMG) with nanometric thicknesses (100~300 nm) was investigated for its structural, electrical, and optical properties. The TFMG structure was examined using scanning electron microscopy and…