A5000926877- Electromagnetic wave absorption materials
- MXene and MAX Phase Materials
- Advanced Sensor and Energy Harvesting Materials
- Advanced Antenna and Metasurface Technologies
- Dielectric materials and actuators
- Conducting polymers and applications
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- 2D Materials and Applications
- Graphene research and applications
- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Supercapacitor Materials and Fabrication
- Block Copolymer Self-Assembly
- Thermal properties of materials
- biodegradable polymer synthesis and properties
- Graphene and Nanomaterials Applications
- Advanced Memory and Neural Computing
- Metamaterials and Metasurfaces Applications
- Ferroelectric and Piezoelectric Materials
- Advanced Polymer Synthesis and Characterization
- Synthesis and properties of polymers
- Advanced biosensing and bioanalysis techniques
- Fiber-reinforced polymer composites
- Polymer Foaming and Composites
Sungkyunkwan University
2022-2025
Korea Institute of Science and Technology
2014-2023
Korea University
2017-2022
Korea University of Science and Technology
2013-2022
Government of the Republic of Korea
2014-2022
Korea Advanced Institute of Science and Technology
2000-2021
Korea Railroad Research Institute
2019
Myongji University
2019
Kyung Hee University
2019
Seoul Institute
2016-2017
Materials with good flexibility and high conductivity that can provide electromagnetic interference (EMI) shielding minimal thickness are highly desirable, especially if they be easily processed into films. Two-dimensional metal carbides nitrides, known as MXenes, combine metallic hydrophilic surfaces. Here, we demonstrate the potential of several MXenes their polymer composites for EMI shielding. A 45-micrometer-thick Ti3C2Tx film exhibited effectiveness 92 decibels (>50 a 2.5-micrometer...
Shields up! Specialized conductive materials are used to shield or block electromagnetic radiation such as microwaves radio waves either prevent the escape of stray interference from unwanted sources. Ideal should show high effective shielding while requiring a small volume mass material. Materials MXene family two-dimensional ceramics, where M is transition metal and X carbon nitrogen, have shown excellent properties. Iqbal et al. now even better somewhat unexpected performance nitride....
Abstract Miniaturization of electronics demands electromagnetic interference (EMI) shielding nanoscale dimension. The authors report a systematic exploration EMI behavior 2D Ti 3 C 2 T x MXene assembled films over broad range film thicknesses, monolayer by monolayer. Theoretical models are used to explain the mechanism below skin depth, where multiple reflection becomes significant, along with surface and bulk absorption radiation. While offers ≈20% waves, 24‐layer ≈55 nm thickness...
New ultrathin and multifunctional electromagnetic interference (EMI) shielding materials are required for protecting electronics against pollution in the fifth-generation networks Internet of Things era. Micrometer-thin Ti3C2Tx MXene films have shown best EMI performance among synthetic so far. Yet, effects elemental composition, layer structure, transition-metal arrangement on properties MXenes not been explored, despite fact that more than 30 different reported, many possible. Here, we...
Lightweight materials with high electrical conductivity and robust mechanical properties are highly desirable for electromagnetic interference (EMI) shielding in modern portable integrated electronics. Herein, a three-dimensional (3D) porous Ti3C2Tx/carbon nanotube (CNT) hybrid aerogel was fabricated via bidirectional freezing method lightweight EMI application. The synergism of the lamellar structure MXene/CNT aerogels contributed extensively to their excellent (9.43 S cm-1) superior...
Abstract Lightweight and mechanically flexible materials that can provide efficient electromagnetic interference (EMI) shielding are highly desirable for protecting portable smart electronic devices against pollution. Here, the authors report a tunable design of three‐dimensional (3D) porous aerogel structure made 2D transition metal carbides carbonitride (MXene) with long‐range order aligned lamellar architecture EMI shielding. Bidirectional freeze‐casting MXene colloidal solutions is used...
Two-dimensional (2D) MXene has shown enormous potential in scientific fields, including energy storage and electromagnetic interference (EMI) shielding. Unfortunately, MXene-based material structures generally suffer from mechanical fragility vulnerability to oxidation. Herein, mussel-inspired dopamine successfully addresses those weaknesses by improving interflake interaction ordering assembled films. Dopamine undergoes situ polymerization binding at flake surfaces spontaneous interfacial...
Prior to the advent of next-generation heater for wearable/on-body electronic devices, various properties are required, including conductivity, transparency, mechanical reliability, and conformability. Expansion two-dimensional (2D) structure metallic nanowires based on network- mesh-type geometries has been widely exploited realizing these heaters. However, routes led many drawbacks such as low-density cross-bar linking, self-aggregation wire, high junction resistance. Although 2D carbon...
Herein, we demonstrate a simple and versatile way for preparing stable Ti3C2Tx MXene dispersions in nonpolar organic solvents through simultaneous interfacial chemical grafting reaction phase transfer method. Alkylphosphonic acid ligands were chemically grafted on the hydroxyl terminal groups of flakes at liquid-liquid interface between water water-immiscible medium to form covalent Ti-O-P bond via nucleophilic addition sequential condensation room temperature; surface-functionalized...
Abstract Terahertz (THz) shielding becomes increasingly important with the growing development of THz electronics and devices. Primarily materials based on carbon nanostructures or polymer–carbon nanocomposites have been explored for this application. Herein, significantly enhanced efficiencies 2D titanium carbide (Ti 3 C 2 MXene) thin films nanoscale metamaterials are presented. Nanoscale slot antenna arrays strong resonances at certain frequencies enhance electromagnetic waves up to three...
Two-dimensional transition metal carbide/nitride (MXene) conductive inks are promising for scalable production of printable electronics, electromagnetic devices, and multifunctional coatings. However, the susceptible oxidation poor rheological property seriously impede printability MXene exploration functional devices. Here, we proposed a controllable surface grafting strategy flakes (p-MXene) with prepolymerized polydopamine macromolecules to protect against water oxygen, enrich chemistry,...
MXenes are two-dimensional (2D) transition metal carbides, nitrides, and carbonitrides with unique intrinsic properties, including excellent electrical conductivity, 2D sheet morphology, lightweight, flexibility, tunable surface chemistry, easy solution processability, thus attracting considerable attention as electromagnetic interference (EMI) shielding materials. In this review, we demonstrate, from both experimental theoretical perspectives, that the outstanding EMI performance of is...
Understanding the oxidation reaction of aqueous Ti3C2Tx MXene suspensions is very important for fostering fundamental academic studies as well widespread industrial applications. Herein, we investigated mechanism and kinetics at various pH temperature conditions. Through comprehensive analysis, chemical oxidative degradation colloids was established. Chemical produces solid products such TiO2 amorphous carbon gaseous species including CH4, CO, CO2, HF. Additionally, our kinetic study...
The use of Ti 3 C 2 T x MXenes/polyaniline composite tremendously improved the electrokinetic energy conversion efficiencies nano-hydroelectric generators, demonstrating a power output sufficient to charge commercial battery for very first time.
Abstract Heterointerface engineering, which plays a pivotal role in developing advanced microwave‐absorbing materials, is employed to design zeolitic imidazolate framework (ZIF)–MXene nanocomposites. The ZIF–MXene composites are prepared by electrostatic self‐assembly of negatively charged titanium carbide MXene flakes and positively Co‐containing ZIF nanomaterials. This approach effectively creates abundant Mott–Schottky heterointerfaces exhibiting robust built‐in electric field (BIEF)...
Abstract Multifunctional, flexible, and robust thin films capable of operating in demanding harsh temperature environments are crucial for various cutting-edge applications. This study presents a multifunctional Janus film integrating highly-crystalline Ti 3 C 2 T x MXene mechanically-robust carbon nanotube (CNT) through strong hydrogen bonding. The hybrid not only exhibits high electrical conductivity (4250 S cm −1 ), but also demonstrates mechanical strength durability both extremely low...