TY - JOUR
T1 - Universal Ligands for Dispersion of Two-Dimensional MXene in Organic Solvents
AU - Ko, Tae Yun
AU - Kim, Daesin
AU - Kim, Seon Joon
AU - Kim, Hyerim
AU - Nissimagoudar, Arun S.
AU - Lee, Seung Cheol
AU - Lin, Xiaobo
AU - Cummings, Peter T.
AU - Doo, Sehyun
AU - Park, Seongmin
AU - Hassan, Tufail
AU - Oh, Taegon
AU - Chae, Ari
AU - Lee, Jihoon
AU - Gogotsi, Yury
AU - In, Insik
AU - Koo, Chong Min
N1 - Funding Information:
This work was supported by grants from the Basic Science Research Program (2022R1A2C3006277 and 2021M3H4A1A03047327) through the National Research Foundation of Korea, funded by the Ministry of Science, ICT and Future Planning, and the Industrial Strategic Technology Development Program (20020855) funded by the Ministry of Trade, Industry and Energy, Republic of Korea. This work was supported by a National Research Council of Science & Technology (NST) grant by the Korea Government (MSIT) (CRC22031-000). This work was partially supported by a start-up fund (S-2022-0096-000) from Sungkyunkwan University. This work was partially supported by the Korea Institute of Science and Technology (KIST). This research was also partially supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2018R1A6A1A03023788 and 2019R1A2C1010692). The collaboration between Drexel University and KIST was supported by the Global Research and Development Center Program (NNFC-Drexel-SMU FIRST Nano Co-op Centre, 2015K1A4A3047100). This work was also supported as part of the Fluid Interface Reactions, Structures and Transport (FIRST) Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. Wei Zhao and Ray Matsumoto are acknowledged for their helpful discussion.
Publisher Copyright:
©
PY - 2022
Y1 - 2022
N2 - Ligands can control the surface chemistry, physicochemical properties, processing, and applications of nanomaterials. MXenes are the fastest growing family of two-dimensional (2D) nanomaterials, showing promise for energy, electronic, and environmental applications. However, complex oxidation states, surface terminal groups, and interaction with the environment have hindered the development of organic ligands suitable for MXenes. Here, we demonstrate a simple, fast, scalable, and universally applicable ligand chemistry for MXenes using alkylated 3,4-dihydroxy-l-phenylalanine (ADOPA). Due to the strong hydrogen-bonding and electron interactions between the catechol head and surface terminal groups of MXenes and the presence of a hydrophobic fluorinated alkyl tail compatible with organic solvents, the ADOPA ligands functionalize MXene surfaces under mild reaction conditions without sacrificing their properties. Stable colloidal solutions and highly concentrated liquid crystals of various MXenes, including Ti2CTx, Nb2CTx, V2CTx, Mo2CTx, Ti3C2Tx, Ti3CNTx, Mo2TiC2Tx, Mo2Ti2C3Tx, and Ti4N3Tx, have been produced in various organic solvents. Such products offer excellent electrical conductivity, improved oxidation stability, and excellent processability, enabling applications in flexible electrodes and electromagnetic interference shielding.
AB - Ligands can control the surface chemistry, physicochemical properties, processing, and applications of nanomaterials. MXenes are the fastest growing family of two-dimensional (2D) nanomaterials, showing promise for energy, electronic, and environmental applications. However, complex oxidation states, surface terminal groups, and interaction with the environment have hindered the development of organic ligands suitable for MXenes. Here, we demonstrate a simple, fast, scalable, and universally applicable ligand chemistry for MXenes using alkylated 3,4-dihydroxy-l-phenylalanine (ADOPA). Due to the strong hydrogen-bonding and electron interactions between the catechol head and surface terminal groups of MXenes and the presence of a hydrophobic fluorinated alkyl tail compatible with organic solvents, the ADOPA ligands functionalize MXene surfaces under mild reaction conditions without sacrificing their properties. Stable colloidal solutions and highly concentrated liquid crystals of various MXenes, including Ti2CTx, Nb2CTx, V2CTx, Mo2CTx, Ti3C2Tx, Ti3CNTx, Mo2TiC2Tx, Mo2Ti2C3Tx, and Ti4N3Tx, have been produced in various organic solvents. Such products offer excellent electrical conductivity, improved oxidation stability, and excellent processability, enabling applications in flexible electrodes and electromagnetic interference shielding.
KW - MXene
KW - electrically conductive MXene organic ink
KW - ligand chemistry
KW - organic dispersion
KW - surface functionalization
KW - two-dimensional (2D) materials
UR - http://www.scopus.com/inward/record.url?scp=85142315477&partnerID=8YFLogxK
U2 - 10.1021/acsnano.2c08209
DO - 10.1021/acsnano.2c08209
M3 - Article
AN - SCOPUS:85142315477
SN - 1936-0851
JO - ACS Nano
JF - ACS Nano
ER -