A5084499141- Graphene research and applications
- Carbon Nanotubes in Composites
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Graphene and Nanomaterials Applications
- Solid-state spectroscopy and crystallography
- Nanomaterials and Printing Technologies
- Organic Electronics and Photovoltaics
- Nanowire Synthesis and Applications
- Nanotechnology research and applications
- Force Microscopy Techniques and Applications
- Diamond and Carbon-based Materials Research
- Semiconductor materials and devices
- Nanopore and Nanochannel Transport Studies
- Semiconductor materials and interfaces
- Crystal Structures and Properties
- Surface Modification and Superhydrophobicity
- Quantum Dots Synthesis And Properties
- ZnO doping and properties
- Analytical Chemistry and Sensors
- Transition Metal Oxide Nanomaterials
- Nonlinear Optical Materials Research
- Mechanical and Optical Resonators
Korea Electrotechnology Research Institute
2015-2025
Korea University of Science and Technology
2015-2025
Sungkyunkwan University
2002-2025
Chungnam National University
2006-2025
Dong-A University
2021
Government of the Republic of Korea
2019
Pusan National University
1995-2013
Nano Carbon (Poland)
2011
Institute for Soldier Nanotechnologies
2010
Massachusetts Institute of Technology
2010
A nanocomposite of polypyrrole/carbon nanotubes prepared by in situ chemical polymerization shows improved conductivity the polypyrrole as compared with its pure form. Its application a sensor, made using simple spin‐casting technique, drastically increased sensitivity. The Figure field‐emission scanning electron microscopy (FE‐SEM) image SWNT/Ppy nanocomposite.
Layered materials must be exfoliated and dispersed in solvents for diverse applications. Usually, highly energetic probe sonication may considered to an unfavourable method the less defective exfoliation dispersion of layered materials. Here we show that judicious use ultrasonic cavitation can produce transition metal dichalcogenide nanosheets extraordinarily non-toxic solvent by minimising sonolysis molecules. Our also lead defective, large graphene oxide from graphite a short time (within...
Abstract Hole‐transport layers (HTL) in perovskite solar cells (PSCs) with an n‐i‐p structure are commonly doped by bis(trifluoromethane)sulfonimide (TFSI) salts to enhance hole conduction. While lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) dopant is a widely used and effective dopant, it has significant limitations, including the need for additional solvents additives, environmental sensitivity, unintended oxidation, migration, which can lead lower stability of PSCs. A novel ionic...
Silicon nanotubes (SiNTs) have been grown on a porous alumina surface, without the assistance of catalysts, by molecular beam epitaxy (MBE). The flow rate Si atoms and corrugated surface seem to play an important role in continuous growth tubular structures. Figure shows field‐emission scanning electron microscopy image SiNTs regular array hexagonal alumina.
We have found a method for diameter-selective removal of metallic single-walled carbon nanotubes (m-SWCNTs) from semiconducting (s-) ones by stirring or sonicating SWCNT powder in tetramethylene sulfone (TMS)/chloroform solution with nitronium hexafluoroantimonate (NO2SbF6: NHFA) and tetrafluoroborate (NO2BF4: NTFB). Positively charged ions (NO2+) were intercalated into nanotube bundles, where the intercalation was promoted also counterions. Nitronium selectively attacked sidewall m-SWCNTs...
In this work, we produced large-area graphene oxide (GO) sheets with fewer defects on the basal plane by application of shear stress in solution to obtain high-quality reduced (RGO) without need for post-annealing processes. This is described as rheologically derived RGO. The GO were generated using a homogenizer aqueous solution, which induced slippage in-plane direction during exfoliation process, contrast conventional sonication method. effects chemical reduction under mild conditions...
Modulation of the junction resistance between metallic nanowires is a crucial factor for high performance network-structured conducting film. Here, we show that under current flow, silver nanowire (AgNW) network films can be stabilised by minimizing Joule heating at NW-NW assisted in-situ interconnection with small amount (less than 3 wt%) single-walled carbon nanotubes (SWCNTs). This was achieved direct deposition AgNW suspension containing SWCNTs functionalised quadruple hydrogen bonding...
Abstract A novel route to preparing highly concentrated and conductive reduced graphene oxide (RGO) in various solvents by monovalent cation– π interaction. Previously, the hydrophobic properties of high‐quality RGO containing few defects oxygen moieties have precluded formation stable dispersion solvents. Cation– interaction between cations, such as Na + or K , six‐membered sp 2 carbons on were achieved simple aging process (GO) nanosheets dispersed alkali solvent. The noncovalent binding...
Abstract The fabrication of a flexible field‐emission device (FED) using single‐walled carbon nanotube (SWNT) network films as the conducting electrodes (anode and cathode) thin multi‐walled CNT/TEOS hybrid emitters is reported. P‐type doping with gold ions passivation tetraethylorthosilicate (TEOS) made SWNT film highly conductive environmentally stable, hence good alternative to conventional indium tin oxide electrodes. showed high current density, low turn‐on field, long‐term emission...
Hard carbons (HCs) are excellent anode materials for sodium-ion batteries (SIBs). However, the carbonization and granulation of HC powders involve complex processes require considerable energy. Here, we developed a facile method manufacturing anodes SIBs via novel microwave induction heating (MIH) process polymer/single-walled carbon nanotube (SWCNT) films. Numerical simulations solving electromagnetic field heat transfer problems revealed MIH mechanism; electric current induced by applied...
The conventional carbonization process for synthesizing hard carbons (HCs) requires high-temperature furnace operations exceeding 1000 °C, leading to excessive energy consumption and lengthy processing times, which necessitates the exploration of more efficient synthesis methods. This study demonstrates rapid preparation HC anodes using intense pulsed light (IPL)-assisted photothermal without prolonged complex typical traditional A composite film microcrystalline cellulose (MCC)...
This study characterizes the effects of incident infrared (IR) radiation on electrical conductivity graphene oxide (GO) and examines its potential for mid-IR detection. Analysis mildly reduced GO (m-GO) transport mechanism near room temperature reveals variable range hopping (VRH) conduction electrons. VRH behavior causes m-GO resistance to exhibit a strong dependence, with large negative coefficient approximately −2 −4% K−1. In addition this transport, presence various oxygen-related...
Directly printed superhydrophobic surfaces containing conducting nanomaterials can be used for a wide range of applications in terms nonwetting, anisotropic wetting, and electrical conductivity. Here, we demonstrated that direct-printable flexible were fabricated on substrates via with an ultrafacile scalable screen printing carbon nanotube (CNT)-based pastes. A polydimethylsiloxane (PDMS)-polyethylene glycol (PEG) copolymer was as additive pastes to realize the printability paste well...
Wrinkle-free reduced graphene oxide (rGO)/TiO(2) hybrid multilayer films were directly fabricated using an rGO solution stabilized by a TiO(2) precursor sol applied over large area air spraying method without the use of additional reduction processes. In-situ insertion layer between sheets dramatically increased conductivity and carrier mobility despite insulating properties amorphous TiO(2). The situated also induced significant hole doping. Electrical hysteresis caused adsorbed water...
Modulation of the carrier concentration and electronic type monolayer (1L) MoS2 is highly important for applications in logic circuits, solar cells, light-emitting diodes. Here, we demonstrate tuning properties large-area 1L-MoS2 using graphene oxide (GO). GO sheets are well-known as hole injection layers since they contain electron-withdrawing groups such carboxyl, hydroxyl, epoxy. The optical GO-treated dramatically changed. photoluminescence intensity increases by more than 470% compared...
Harsh oxidation of 1 nm single-walled carbon nanotubes (SWCNTs) can lead to fatal defect structures, which jeopardize their mechanical and electrical performances. Here, we show the structural recovery highly oxidized SWCNTs (Ox-SWCNTs), were rapidly (within h) by kneading without forming failure-causing defects inspired flour dough. The rational debundled led obtaining thermodynamically stable SWCNT solutions in water or even alcohol dispersant molecules. Importantly, structure Ox-SWCNTs...
We have synthesized thin multiwalled carbon nanotubes (t-MWNTs) using a catalytic chemical vapor deposition (CCVD) method with FeMoMgO catalyst. The number of tube walls were 2∼6 the corresponding diameters 3∼6 nm. obtained high production yield over 3000 wt % compared to weight supplied These t-MWNTs revealed intermediate structural characteristics between single- and (SWNTs MWNTs). Critical issues for synthesis further discussed in terms reduction procedure, growth time, gas species.
Compared with traditional metal-oxide lithium-ion battery (LIB) cathodes, nanocarbon-based cathode materials have received much attention for potential application in LIBs because of their superior power density and long-term cyclability. However, storage capacity needs further improvement practical applications, the trade-off between conductivity, when oxygen functional groups as sites are introduced to nanocarbon materials, be addressed. Here, we report a sequential oxidation–reduction...
Printing technologies that integrate wearable components onto flexible and stretchable substrates are crucial for the development of miniaturized electronics. In this study, we developed all-printed paper-based micro-supercapacitors based on water-based additive-free oxidized single-walled carbon nanotube pastes. The use a modified Brodie's method with mild oxidants minimum usage strong acids enabled production highly conductive printable Pseudo-plastic pastes were obtained because numerous...