A5071224747- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- 2D Materials and Applications
- Advanced Photocatalysis Techniques
- MXene and MAX Phase Materials
- Graphene research and applications
- Perovskite Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- ZnO doping and properties
- Nanowire Synthesis and Applications
- Transition Metal Oxide Nanomaterials
- Supercapacitor Materials and Fabrication
- Energy Efficient Wireless Sensor Networks
- Catalytic Processes in Materials Science
- Molecular Communication and Nanonetworks
- Acoustic Wave Resonator Technologies
- Copper-based nanomaterials and applications
- Mineral Processing and Grinding
- Graphene and Nanomaterials Applications
- Bluetooth and Wireless Communication Technologies
- Neural Networks and Applications
- Aerogels and thermal insulation
- Chalcogenide Semiconductor Thin Films
- Carbon and Quantum Dots Applications
Korea Research Institute of Chemical Technology
2022-2024
Ulsan National Institute of Science and Technology
2017-2022
Government of the Republic of Korea
2018-2020
Room-temperature (RT) gas sensitivity of morphology-controlled free-standing hollow aluminum-doped zinc oxide (AZO) nanofibers for NO
Abstract Portable and personalized artificial intelligence (AI)‐driven sensors mimicking human olfactory gustatory systems have immense potential for the large‐scale deployment autonomous monitoring of Internet Things (IoT) devices. In this study, an Q‐grader comprising surface‐engineered zinc oxide (ZnO) thin films is developed as nose, tongue, AI‐based statistical data analysis brain identifying both aroma flavor chemicals in coffee beans. A poly(vinylidene...
Facile synthesis of zero-dimensional heterostructures consisting N-doped graphene quantum dots (N-GDs) and SnO<sub>2</sub> nanoparticles is reported for the NO<sub>2</sub> gas sensor with high sensitivity excellent selectivity.
A synthetic platform for industrially applicable two-dimensional (2D) semiconductors that addresses the paramount issues associated with large-scale production, wide-range photosensitive materials, and oxidative stability has not yet been developed. In this study, we attained 6 in. scale production of 2D SnSe spatial homogeneity using a rational based on thermal decomposition solution-processed single-source precursors. The long-range structural chemical homogeneities layers are manifested...
Constructing pertinent nanoarchitecture with abundant exposed active sites is a valid strategy for boosting photocatalytic hydrogen generation. However, the controllable approach of an ideal architecture comprising vertically standing transition metal chalcogenides (TMDs) nanosheets on 3D graphene network remains challenging despite potential efficient production. In this study, we fabricated edge-rich structuring photocatalysts involving grown TMDs porous framework (referred to as Gr). 2D...
The growing need for highly sensitive and selective gas sensors has spurred extensive research on enhancing metal-oxide-semiconductor-based sensors. In this study, we explored the gas-sensing performance of ZnO thin films functionalized with noble metals (Ir, Ru, IrRu alloys) via atomic layer deposition detection hazardous gases. incorporation led to significant improvements in behavior driven by both electronic chemical sensitization mechanisms. To further enhance selectivity, machine...
To enhance the charge separation and kinetics of water oxidation using a BiVO<sub>4</sub> photoanode, BiVO<sub>4</sub>/ZnO nanowire heterostructure decorated with gold (Au) nanoparticles is fabricated as photoanode for photoelectrochemical splitting.
CuO nanorods impregnated Nb 2 O 5 composites have been thermodynamically designed for facile interfacial charge transfer, which favors sulfidation and oxidation with reversible, selective, stable sub-ppm H S sensing at a constant temperature.
This article presents a wide-dynamic-range multi-sensor readout interface for portable environmental monitoring systems with two-step self-optimization schemes. It proposes methods of adaptive range detection and coarse self-cancelation (CSC) current-type sensor interfaces, range-based path control current DAC-based correlated double sampling (CDS) resistive sensing interfaces. Their digital conversions are provided by two kinds high-resolution ADCs, namely, an incremental ΔΣ detector SAR-...
The demand for power-efficient micro-and nanodevices is increasing rapidly. In this regard, electrothermal nanowire-based heaters are promising solutions the ultralow-power devices required in IoT applications. Herein, a method demonstrated producing 1D nanoheater by selectively coating suspended pyrolyzed carbon nanowire backbone with thin Au resistive heater layer and utilizing it portable gas sensor system. This sophisticated nanostructure developed without complex nanofabrication...
Despite the encouraging properties and research of 2D MoS2 , an ongoing issue associated with oxidative instability remains elusive for practical optoelectronic applications. Thus, in-depth understanding oxidation behavior large-scale homogeneous is imperative. Here structural chemical transformations large-area multilayers by air-annealing altered temperature time via combinatorial spectro-microscopic analyses (Raman spectroscopy, X-ray photoelectron atomic force microscopy) are surveyed....
This paper presents a mixture-gas detectable edge-computing device with generative learning framework for selectivity and accuracy. Mixture-gas detection capability is enabled through two proposed schemes of temperature modulation cross-iterative-tuning artificial neural network (CIT-ANN). Their related computations are facilitated inside the edge level, applying analog normalization concepts in readout integrated circuit (ROIC). platform provides training data detection, allowing much less...
Abstract Real‐world applications of graphene require reliable routes for synthesizing large‐area and methods to tune its structural electrical properties. A viable facile route is presented 3D porous (3PG) on PI films with tunable patterns locations via the photon‐pen writing technique subsequent oxygen plasma treatment. The laser power scan speed are optimized 3PG synthesis. properties surface hydrophilicity controlled customization optimal treatment duration inter‐spacing. capability...
Abstract The tunable properties of 2D transition‐metal dichalcogenide (TMDs) materials are extensively investigated for high‐performance and wavelength‐tunable optoelectronic applications. However, the precise modification large‐scale systems practical applications remains a challenge. In this study, wafer‐scale atomic assembly process to produce multinary (binary, ternary, quaternary) TMDs broadband photodetection is demonstrated. large‐area growth homogeneous MoS 2 , Ni 0.06 Mo 0.26 S 0.68...
Although structural engineering and phase modulation of transition metal dichalcogenides (TMDs) can be used to implement high-performance optoelectronic devices or energy cells, their expandability combined with individualized optimization for diverse applications using limited TMD materials is still challenging. Herein, we suggest an intriguing strategy control the target functionalities Mo-S-Te ternary system heat-driven crystallographic selection. The structure alteration effectively...
Junction networks made of longitudinally connected metal oxide nanowires (MOx NWs) have been widely utilized in resistive-type gas sensors because the potential barrier at NW junctions leads to improved sensing performances. However, conventional MOx–NW-based exhibit limited access sites and reduced utilization entire surfaces are grown on substrate. This study presents a novel sensor platform facilitating formation ZnO junction suspended architecture by growing NWs radially carbon mesh...
Abstract Low‐temperature processes and simplification of lithographic techniques are key challenges for the fabrication solution‐processed metal oxide‐based nanodevices. Recent breakthroughs in location‐specific synthetic methodologies involving inkjet printing photon‐activation routes have enabled lithography‐free bottom‐up such devices. However, a revolutionary strategy to resolve room‐temperature direct materials still remains elusive. Here, pertinent route enabling wafer‐scale,...
This paper reports a novel metal oxide nanowire (MOx NW) based gas senor built on suspended carbon heater allowing ultra-low power consumption. sensing platform was fabricated using only wafer level batch fabrication processes such as carbon-MEMS, atomic layer deposition, and hydrothermal growth processes. Owing to the mechanical rigidity, allows selective circumferential of MOx NWs its surface. The NW are electrically separated with thin HfO <sub...
Abstract 2D van der Waals (vdW) hetero integration, which features exotic interplanar interactions derived from mixed‐dimensional heterostructures, is an emergent platform for implementing high‐performance electronics and broadband/wavelength‐tunable photodetectors. However, the production of large‐area spatially homogeneous transition‐metal dichalcogenides (TMDs) elucidation electrostatic dynamics governing interlayer are two paramount prerequisites realizing practical...