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electrochemistry (172) 172
materials science, ceramics (128) 128
chemistry (124) 124
materials science, multidisciplinary (119) 119
sensors (95) 95
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nanoscience & nanotechnology (59) 59
nanoparticles (57) 57
investigating or analysing materials by determining theirchemical or physical properties (52) 52
measuring (52) 52
testing (52) 52
physics, applied (51) 51
electricity (50) 50
performance (50) 50
nanostructures (49) 49
chemistry, multidisciplinary (48) 48
chemistry, physical (48) 48
nanowires (46) 46
metallurgy (45) 45
basic electric elements (43) 43
humans (43) 43
ethanol (42) 42
sintering (42) 42
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gassensor (40) 40
oxide (38) 38
microstructure (37) 37
selectivity (37) 37
films (35) 35
powders (35) 35
fabrication (34) 34
thin films (34) 34
spray pyrolysis (33) 33
performing operations (32) 32
transporting (32) 32
analysis (30) 30
nanocomposites (30) 30
sensing properties (30) 30
inorganic chemistry (29) 29
nanomaterials (29) 29
nanorods (29) 29
zinc oxide (29) 29
energy & fuels (27) 27
gas-sensing properties (27) 27
sensitivity (26) 26
thin-films (26) 26
sno (25) 25
temperature (25) 25
electrolytes (24) 24
toluene (24) 24
electrodes (23) 23
nanofibers (23) 23
nanotechnology (23) 23
deposition (22) 22
hollow spheres (22) 22
index medicus (22) 22
lithium (22) 22
tin dioxide (22) 22
compounds containing metals not covered by subclassesc01d or c01f (21) 21
electric properties (21) 21
lithium-ion batteries (21) 21
oxidation (21) 21
processes or means, e.g. batteries, for the direct conversionof chemical into electrical energy (21) 21
semiconductor devices (21) 21
electric solid state devices not otherwise provided for (20) 20
nanocrystals (20) 20
physics, condensed matter (20) 20
spray-pyrolysis (20) 20
diffusion (19) 19
electrospinning (19) 19
mutation (19) 19
oxides (19) 19
pyrolysis (19) 19
tin oxides (19) 19
zno (19) 19
electrical-properties (18) 18
fuel cells (18) 18
general tagging of cross-sectional technologies spanning over several sections of the ipc (18) 18
general tagging of new technological developments (18) 18
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (18) 18
xylene (18) 18
carbon (17) 17
dielectric films (17) 17
discharge (17) 17
microspheres (17) 17
nitrogen dioxide (17) 17
oncology (17) 17
selective detection (17) 17
surface (17) 17
tin oxide (17) 17
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1. Full Text Gas sensors using hierarchical and hollow oxide nanostructures: Overview
by Lee, Jong-Heun
Sensors & Actuators: B. Chemical, ISSN 0925-4005, 2009, Volume 140, Issue 1, pp. 319 - 336
Hierarchical and hollow oxide nanostructures are very promising gas sensor materials due to their high surface area and well-aligned nanoporous structures with... 
Hollow structures | Hierarchical nanostructures | Gas response kinetics | Oxide semiconductor gas sensors | Gas response | ZNO NANOSTRUCTURES | ELECTROCHEMISTRY | CHEMISTRY, ANALYTICAL | SPHERICAL NI PARTICLES | AIR-QUALITY CONTROL | SENSING PROPERTIES | POLYCRYSTALLINE SNO2 NANOWIRES | INSTRUMENTS & INSTRUMENTATION | ULTRASONIC SPRAY-PYROLYSIS | MESOPOROUS METAL-OXIDES | COMBINATORIAL SOLUTION DEPOSITION | LITHIUM-ION BATTERIES | THIN-FILM | Nanotechnology | Sensors
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2. Full Text Investigation of Binary Metal (Ni, Co) Selenite as Li‐Ion Battery Anode Materials and Their Conversion Reaction Mechanism with Li Ions
by Park, Gi Dae and Yang, Sung Jin and Lee, Jong‐Heun and Kang, Yun Chan
Small, ISSN 1613-6810, 12/2019, Volume 15, Issue 51, pp. e1905289 - n/a
Highly efficient anode materials with novel compositions for Li‐ion batteries are actively being researched. Multicomponent metal selenite is a promising... 
Prussian blue analogues | anode materials | Li‐ion batteries | binary metal selenite | conversion mechanism | Electrochemical analysis | Lithium oxides | Intermetallic compounds | Conversion | Cobalt | Ion storage | Lithium-ion batteries | Electrode materials | Nanocrystals | Spectrum analysis | Pigments | Nickel | Photoelectrons | Selenium | Reaction mechanisms | Anodes | Heterostructures | Electrons | Electrochemical impedance spectroscopy
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3. Full Text Design of highly selective gas sensors via physicochemical modification of oxide nanowires: Overview
by Woo, Hyung-Sik and Na, Chan Woong and Lee, Jong-Heun
Sensors (Switzerland), ISSN 1424-8220, 09/2016, Volume 16, Issue 9, p. 1531
Strategies for the enhancement of gas sensing properties, and specifically the improvement of gas selectivity of metal oxide semiconductor nanowire (NW)... 
CVD | Surface modification | Selectivity | Nanowires | Gas sensors | selectivity | ELECTROCHEMISTRY | CHEMISTRY, ANALYTICAL | ETHANOL SENSING CHARACTERISTICS | surface modification | HIERARCHICAL NANOSTRUCTURES | SENSITIVE DETECTION | ZNO NANOWIRES | LOW-TEMPERATURE | TIN-OXIDE | INSTRUMENTS & INSTRUMENTATION | nanowires | gas sensors | DOPED SNO2 NANOWIRES | CORE-SHELL NANOWIRES | GA2O3 THIN-FILMS | SURFACE-CHEMISTRY
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4. Full Text A New Strategy for Humidity Independent Oxide Chemiresistors: Dynamic Self‐Refreshing of In2O3 Sensing Surface Assisted by Layer‐by‐Layer Coated CeO2 Nanoclusters
by Yoon, Ji‐Wook and Kim, Jun‐Sik and Kim, Tae‐Hyung and Hong, Young Jun and Kang, Yun Chan and Lee, Jong‐Heun
Small, ISSN 1613-6810, 08/2016, Volume 12, Issue 31, pp. 4229 - 4240
The humidity dependence of the gas sensing characteristics of metal oxide semiconductors has been one of the greatest obstacles for gas sensor applications... 
humidity dependence | semiconductor gas sensors | CeO2‐In2O3 | layer‐by‐layer assemblies | regenerative surfaces | Humidity dependence | Semiconductor gas sensors | Layer-by-layer assemblies | CeO | In | Regenerative surfaces | DIAGNOSIS | PHYSICS, CONDENSED MATTER | PHYSICS, APPLIED | MATERIALS SCIENCE, MULTIDISCIPLINARY | ACETONE | CHEMISTRY, PHYSICAL | NANOSCIENCE & NANOTECHNOLOGY | EXHALED-BREATH | GAS SENSORS | CHEMISTRY, MULTIDISCIPLINARY | ELECTRONIC NOSE | NANOPARTICLES | NANOWIRE | CHROMATOGRAPHY-MASS SPECTROMETRY | METAL-OXIDES | WATER | Cerium | Humidity | Sensors
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5. Full Text Thin‐Wall Assembled SnO2 Fibers Functionalized by Catalytic Pt Nanoparticles and their Superior Exhaled‐Breath‐Sensing Properties for the Diagnosis of Diabetes
by Shin, Jungwoo and Choi, Seon‐Jin and Lee, Inkun and Youn, Doo‐Young and Park, Chong Ook and Lee, Jong‐Heun and Tuller, Harry L and Kim, Il‐Doo
Advanced Functional Materials, ISSN 1616-301X, 05/2013, Volume 23, Issue 19, pp. 2357 - 2367
Hierarchical SnO2 fibers assembled from wrinkled thin tubes are synthesized by controlling the microphase separation between tin precursors and polymers, by... 
tin oxide | phase separation | sensors | electrospinning | diabetes | SURFACE-MORPHOLOGY | PHYSICS, CONDENSED MATTER | PHYSICS, APPLIED | NANOFIBERS | MATERIALS SCIENCE, MULTIDISCIPLINARY | ACETONE | CHEMISTRY, PHYSICAL | ELECTROSPUN | NANOSCIENCE & NANOTECHNOLOGY | GAS SENSORS | CHEMISTRY, MULTIDISCIPLINARY | MASS-SPECTROMETRY | LUNG-CANCER | SIFT-MS | ION FLOW TUBE | VOLATILE ORGANIC-COMPOUNDS | Nanoparticles | Diagnosis | Diabetes | Lung cancer | Toluene
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6. Full Text One‐Pot Synthesis of Pd‐Loaded SnO2 Yolk–Shell Nanostructures for Ultraselective Methyl Benzene Sensors
by Hong, Young Jun and Yoon, Ji‐Wook and Lee, Jong‐Heun and Kang, Yun Chan
Chemistry – A European Journal, ISSN 0947-6539, 03/2014, Volume 20, Issue 10, pp. 2737 - 2741
A continuous, single‐step, and large‐scale preparation of Pd‐catalyst‐loaded SnO2 yolk–shell spheres is demonstrated. These nanostructures show an unusually... 
tin oxide | palladium | sensors | yolk–shell | spray pyrolysis | yolk-shell | ION BATTERIES | OXIDE | CATALYST | CHEMISTRY, MULTIDISCIPLINARY | SENSING PROPERTIES | NO2 | NANOPARTICLES | POWDERS | FIBERS | TEMPLATE | Palladium catalysts | Pyrolysis | Palladium | Sensors | Benzene | Toluene | Indoor air quality
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7. Full Text Effect of esterification reaction of citric acid and ethylene glycol on the formation of multi-shelled cobalt oxide powders with superior electrochemical properties
by Gi Dae Park Jong-Heun Lee Jung-Kul Lee Yun Chan Kang
纳米研究：英文版, ISSN 1998-0124, 2014, Volume 7, Issue 12, pp. 1738 - 1748
In this study, for the first time, polymeric precursors have been used in the preparation of yolk-shell powders using a large-scale spray drying process. An... 
酯化反应 | 粉体性能 | 乙二醇 | 放电容量 | 氧化钴 | 有机聚合物 | 干燥过程 | 柠檬酸 | Condensed Matter Physics | Biotechnology | yolk-shell | energy storage | Materials Science, general | lithium battery | Atomic/Molecular Structure and Spectra | Material Science | spray drying | Nanotechnology | Biomedicine general | synthesis design | PHYSICS, APPLIED | MATERIALS SCIENCE, MULTIDISCIPLINARY | POT FACILE SYNTHESIS | BINDER-FREE | CHEMISTRY, PHYSICAL | SPRAY-DRYING PROCESS | NANOSCIENCE & NANOTECHNOLOGY | PERFORMANCE ANODE MATERIALS | HOLLOW MICROSPHERES | RATE CAPABILITY | LITHIUM-ION BATTERIES | GD2O3-EU PHOSPHOR PARTICLES | ACCURATE CONTROL | Ethylene glycol | Powders | Hydroxides | Synthesis | Chemical properties | Polymers | Citric acid | Organic compounds | Electrochemical analysis | Spray drying | Cobalt oxides | Droplets | Discharge | Polymeric precursors
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8. Full Text A New Concept for Obtaining SnO2 Fiber‐in‐Tube Nanostructures with Superior Electrochemical Properties
by Hong, Young Jun and Yoon, Ji‐Wook and Lee, Jong‐Heun and Kang, Yun Chan
Chemistry – A European Journal, ISSN 0947-6539, 01/2015, Volume 21, Issue 1, pp. 371 - 376
Tin oxide (SnO2) nanotubes with a fiber‐in‐tube structure have been prepared by electrospinning and the mechanism of their formation has been investigated. Tin... 
tin oxide | nanotubes | anode materials | lithium‐ion batteries | cyclic voltammetry | electrospinning | Cyclic voltammetry | Lithium-ion batteries | Electrospinning | Tin oxide | Anode materials | Nanotubes | ENERGY | ELECTROSPUN NANOFIBERS | POT FACILE SYNTHESIS | PERFORMANCE ANODE MATERIAL | CHEMISTRY, MULTIDISCIPLINARY | COMPOSITE | lithium-ion batteries | HOLLOW | FABRICATION | NANOWIRES | Chemical properties | Electric properties
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9. Full Text Pure and Palladium‐Loaded Co3O4 Hollow Hierarchical Nanostructures with Giant and Ultraselective Chemiresistivity to Xylene and Toluene
by Hwang, Su‐Jin and Choi, Kwon‐Il and Yoon, Ji‐Wook and Kang, Yun Chan and Lee, Jong‐Heun
Chemistry – A European Journal, ISSN 0947-6539, 04/2015, Volume 21, Issue 15, pp. 5872 - 5878
Pure and palladium‐loaded Co3O4 hollow hierarchical nanostructures consisting of nanosheets have been prepared by solvothermal self‐assembly. The... 
palladium | cobalt | sensors | methylbenzenes | nanostructures | DOPED ZNO NANOPARTICLES | PERFORMANCE | SENSITIVITY | NANORODS | CHEMISTRY, MULTIDISCIPLINARY | SNO2 NANOSTRUCTURES | CATALYTIC-OXIDATION | METAL | GAS-SENSING PROPERTIES | VOLATILE ORGANIC-COMPOUNDS | Toluene - analysis | Nanostructures - ultrastructure | Oxides - chemistry | Models, Molecular | Nanostructures - chemistry | Catalysis | Palladium - chemistry | Cobalt - chemistry | Xylenes - analysis | Palladium catalysts | Palladium | Adsorption | Paraxylene | Toluene | Indoor air quality | Index Medicus
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10. Full Text The Role of NiO Doping in Reducing the Impact of Humidity on the Performance of SnO2‐Based Gas Sensors: Synthesis Strategies, and Phenomenological and Spectroscopic Studies
by Kim, Hae‐Ryong and Haensch, Alexander and Kim, Il‐Doo and Barsan, Nicolae and Weimar, Udo and Lee, Jong‐Heun
Advanced Functional Materials, ISSN 1616-301X, 12/2011, Volume 21, Issue 23, pp. 4456 - 4463
The humidity dependence of the gas‐sensing characteristics in SnO2‐based sensors, one of the greatest obstacles in gas‐sensor applications, is reduced to a... 
humidity | SnO2 | response/recovery speed | NiO | gas sensors | SnO | PHYSICS, CONDENSED MATTER | PHYSICS, APPLIED | OXIDE | MATERIALS SCIENCE, MULTIDISCIPLINARY | CHEMISTRY, PHYSICAL | NANOSCIENCE & NANOTECHNOLOGY | CHEMISTRY, MULTIDISCIPLINARY | FILMS | response | SURFACE | recovery speed | Tin oxides | Tin dioxide | Atmospheres | Nanocomposites | Doping | Humidity | Nanomaterials | Nanostructure
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11. Recent advances in organic sensors for health self-monitoring systems
by Yoon Ho Lee and O Young Kweon and Hongki Kim and Jong Heun Yoo and Seul Gi Han and Joon Hak Oh
Journal of Materials Chemistry. C, Materials for Optical and Electronic Devices, ISSN 2050-7526, 01/2018, Volume 6, Issue 32, pp. 8569 - 8612
Health self-monitoring systems that can automatically recognize health information and respond in real-time through wearable sensors and artificial... 
Stretchability | Systems health monitoring | Weight reduction | Monitoring systems | Organic semiconductors | Sensors | Wearable technology
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12. Full Text Electrochemical properties of tungsten sulfide-carbon composite microspheres prepared by spray pyrolysis
by Choi, Seung Ho and Boo, Sung Jin and Lee, Jong-Heun and Kang, Yun Chan
Scientific Reports, ISSN 2045-2322, 08/2014, Volume 4, Issue 1, p. 5755
Tungsten sulfide (WS2)-carbon composite powders with superior electrochemical properties are prepared by a two-step process. WO3-carbon composite powders were... 
STORAGE | FEW-LAYER WS2 | ENERGY-CONVERSION | ANODE MATERIALS | MOS2 | PERFORMANCE | MULTIDISCIPLINARY SCIENCES | YOLK-SHELL | LITHIUM-ION BATTERIES | MOS2-GRAPHENE COMPOSITES | GRAPHENE NANOSHEETS | Sulfide | Pyrolysis | Microspheres | Carbon | Tungsten
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13. Full Text Synthesis Process of CoSeO 3 Microspheres for Unordinary Li-ion Storage Performances and Mechanism of Their Conversion Reaction with Li ions
by Park, Gi Dae and Hong, Jeong Hoo and Choi, Jae Hun and Lee, Jong-Heun and Kim, Yang Soo and Kang, Yun Chan
Small (Weinheim an der Bergstrasse, Germany), ISSN 1613-6810, 06/2019, Volume 15, Issue 24, p. e1901320
Multicomponent materials with various double cations have been studied as anode materials of lithium-ion batteries (LIBs). Heterostructures formed by coupling... 
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14. Full Text Monolayer Co3O4 Inverse Opals as Multifunctional Sensors for Volatile Organic Compounds
by Lee, Chul‐Soon and Dai, Zhengfei and Jeong, Seong‐Yong and Kwak, Chang‐Hoon and Kim, Bo‐Young and Kim, Do Hong and Jang, Ho Won and Park, Joon‐Shik and Lee, Jong‐Heun
Chemistry – A European Journal, ISSN 0947-6539, 05/2016, Volume 22, Issue 21, pp. 7102 - 7107
Monolayers of periodic porous Co3O4 inverse opal (IO) thin films for gas‐sensor applications were prepared by transferring cobalt‐solution‐dipped polystyrene... 
template synthesis | sensors | monolayers | nanostructures | thin films | XYLENE | PERFORMANCE | TOLUENE | HIERARCHICAL NANOSTRUCTURES | SENSITIVE DETECTION | CHEMISTRY, MULTIDISCIPLINARY | MESOPOROUS CO3O4 | CATALYTIC-OXIDATION | FABRICATION | GAS-SENSING PROPERTIES | THIN-FILM | Volatile organic compounds | Sensors | Benzene | Monomolecular films
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15. Full Text Trimodally porous SnO2 nanospheres with threedimensional interconnectivity and size tunability: A one-pot synthetic route and potential application as an extremely sensitive ethanol detector
by Yoon, Ji-Wook and Choi, Seung Ho and Kim, Jun-Sik and Jang, Ho Won and Kang, Yun Chan and Lee, Jong-Heun
NPG Asia Materials, ISSN 1884-4049, 03/2016, Volume 8, Issue 3
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16. Full Text CuO nanowire gas sensors for air quality control in automotive cabin
by Kim, Yoon-Sung and Hwang, In-Sung and Kim, Sun-Jung and Lee, Choong-Yong and Lee, Jong-Heun
Sensors & Actuators: B. Chemical, ISSN 0925-4005, 2008, Volume 135, Issue 1, pp. 298 - 303
CuO nanowires (NWs) were grown by the thermal oxidation of Cu foil at 400 °C and gas sensors were fabricated by the deposition of a solution containing the CuO... 
Automobile ventilation | CuO nanowires | Thermal oxidation | NO 2 | NO | CO | NO2 | ELECTROCHEMISTRY | CHEMISTRY, ANALYTICAL | INSTRUMENTS & INSTRUMENTATION | MECHANISM | GROWTH | IN2O3 NANOWIRES | SNO2 NANOWIRES | Algorithms | Air quality | Air pollution | Sensors | Copper oxide | Air quality management | Cuprite | SEMICONDUCTORS | P-type semiconductors | Nanomaterials | QUALITY CONTROL | COPPER OXIDE | MICROSTRUCTURES | ELECTRONIC PRODUCTS | MICROWIRE | Cabins | AUTOMOBILES | Nanowires | Nitrogen dioxide | Gas sensors
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17. Full Text Electrochemical Properties of Yolk–Shell‐Structured Zn–Fe–S Multicomponent Sulfide Materials with a 1:2 Zn/Fe Molar Ratio
by Won, Jong Min and Lee, Jong‐Heun and Kang, Yun Chan
Chemistry – A European Journal, ISSN 0947-6539, 01/2015, Volume 21, Issue 4, pp. 1429 - 1433
Yolk–shell‐structured Zn–Fe–S multicomponent sulfide materials with a 1:2 Zn/Fe molar ratio were prepared applying a sulfidation process to ZnFe2O4 yolk–shell... 
energy storage materials | energy conversion | nanostructures | spray drying | synthesis design | Spray drying | Energy storage materials | Synthesis design | Nanostructures | Energy conversion | COMP