A5100363891- Membrane Separation and Gas Transport
- Membrane Separation Technologies
- Graphene research and applications
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Memory and Neural Computing
- Advanced Surface Polishing Techniques
- Fuel Cells and Related Materials
- Supercapacitor Materials and Fabrication
- Covalent Organic Framework Applications
- Membrane-based Ion Separation Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Sensor and Energy Harvesting Materials
- Advancements in Battery Materials
- CCD and CMOS Imaging Sensors
- Advanced Semiconductor Detectors and Materials
- Nanopore and Nanochannel Transport Studies
- Organic Electronics and Photovoltaics
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Transition Metal Oxide Nanomaterials
- Zeolite Catalysis and Synthesis
- Semiconductor materials and devices
- Radiation Effects in Electronics
- Ferroelectric and Negative Capacitance Devices
- Power Systems and Renewable Energy
Massachusetts Institute of Technology
2024-2025
Sungkyunkwan University
2025
Hanyang University
2017-2024
Kyungpook National University
2022-2024
Seoul National University
2018-2023
University of Cambridge
2020-2023
Institute of Microelectronics
2022
Singapore University of Technology and Design
2022
Agency for Science, Technology and Research
2022
Anyang University
2022
Abstract Highly permselective and durable membrane materials have been sought for energy‐efficient C 3 H 6 /C 8 separation. Mixed‐matrix membranes (MMMs) comprising a polymer matrix metal–organic frameworks (MOFs) are promising candidates this application; however, rational matching of filler‐matrix is challenging their separation performances need to be further improved. Here, we propose novel strategy “defect engineering” in MOFs as an additional degree freedom design advanced MMMs. MMMs...
Integrating different modification strategies into a single step to achieve the desired properties of metal-organic frameworks (MOFs) has been very synthetically challenging, especially in developing advanced MOF/polymer mixed matrix membranes (MMMs). Herein, we report polymer-MOF (polyMOF) system constructed from carboxylated polymer with intrinsic microporosity (cPIM-1) ligand. This intrinsically microporous ligand could coordinate metals, leading ~100 nm-sized polyMOF nanoparticles....
Numerous modified-carbon catalysts have been developed for the direct synthesis of hydrogen peroxide through electrochemical oxygen reduction. However, given complex structure most porous carbons and poor reduction reaction (ORR) selectivity typically observed when they are used as catalysts, it is still unclear which carbon defects responsible high two-electron ORR activity in these materials. Here, we study electrocatalytic formation nitrogen-doped reduced graphene oxide (N-rGO) materials...
Thin-film nanocomposite (TFN) membranes incorporating nanofillers in ultrathin and selective polyamide layers have improved desalination performance conventional reverse osmosis (RO) membranes. However, further enhancement of RO TFN using only a single nanofiller remains challenging due to difficulties optimizing permselectivity, dispersibility, chemical stability. To circumvent this limitation, we prepared hybrids zeolitic imidazole framework-8 (ZIF-8) carbon nanotubes (CNTs) exploit the...
Abstract Incorporation of defects in metal–organic frameworks (MOFs) offers new opportunities for manipulating their microporosity and functionalities. The so‐called “defect engineering” has great potential to tailor the mass transport properties MOF/polymer mixed matrix membranes (MMMs) challenging separation applications, example, CO 2 capture. This study first investigates impact MOF on membrane resultant MMMs separation. Highly porous defect‐engineered UiO‐66 nanoparticles are...
An integrated textile electronic system is reported here, enabling a truly free form factor via manufacturing integration of fiber-based components. Intelligent and smart systems require freedom factor, unrestricted design, unlimited scale. Initial attempts to develop conductive fibers electronics failed achieve reliable performance required for industrial-scale technical textiles by standard weaving technologies. Here, we present with functional one-dimensional devices, including fiber...
Fine-tuning microporosity in polymers with a scalable method has great potential for energy-efficient molecular separations. Here, we report dual-phase engineering approach to prepare microporous polymer nanofilms through interfacial polymerization. By integrating two micropore-generating units such as water-soluble Tröger's base diamine (TBD) and contorted spirobifluorene (SBF) motif, the resultant TBD-SBF polyamide shows an unprecedentedly high surface area. An ultrathin membrane (~20 nm)...
Abstract Both high gain and transconductance at low operating voltages are essential for practical applications of organic field-effect transistors (OFETs). Here, we describe the significance double-layer capacitance effect in polar rubbery dielectrics, even when present a very ion concentration conductivity. We observed that this can greatly enhance OFET driven voltages. Specifically, elastomer poly(vinylidene fluoride-co-hexafluoropropylene) (e-PVDF-HFP) was used as dielectric layer,...
H 2 S/CH 4 and CO /CH separations show opposing trends, making simultaneous improvement challenging. This is addressed by increasing free volume to enhance competitive sorption effects boosting diffusion selectivity through in situ crosslinking.
Interfacial polymerization has been an industrial standard for preparing desalination membranes. Extending the same concept to molecular separation of organic solvents would be a key enabler decarbonization chemical and petrochemical industries through energy-efficient crude or biocrude oil fractionation. Here, we report engineering approach based on acid-catalyzed interfacial efficient hydrocarbon separation. The design strategies include (i) changing linkage from amide imine (ii)...
Significance Solution-processed organic electronics are expected to pave the way for low-cost large-area with new and exciting applications. However, realizing solution-processed requires densely packed transistors patterned precisely registered semiconductors (OSCs) within transistor channel uniform electrical properties over a large area, task that remains significant challenge. To address such challenge, we have developed an innovative technique generates self-patterned self-registered...
Abstract Fine control of ultramicroporosity (<7 Å) in carbon molecular sieve (CMS) membranes is highly desirable for challenging gas separation processes. Here, a versatile approach proposed to fabricate hybrid CMS (HCMS) with unique textural properties as well tunable ultramicroporosity. The HCMS are formed by pyrolysis polymer nanocomposite precursor containing metal‐organic frameworks (MOFs) carbonizable nanoporous filler. MOF‐derived carbonaceous phase displays good compatibility the...
Polyimide membranes have been widely investigated in gas separation applications due to their high abilities, excellent processability, relatively low cost, and stabilities. Unfortunately, it is extremely challenging simultaneously achieve both improved permeability selectivity the trade-off relationship common polymer membranes. Diamine modification a simple strategy tune performance of polyimide membranes, but an excessive loss also generally observed. In present work, we reported effects...
Thin-film nanocomposite (TFN) membranes prepared by embedding nanofillers into an ultrathin polyamide layer have paved the way toward developing high-performance reverse osmosis (RO) desalination membranes. Scale-up production of TFN is still a challenging issue, however, since previous studies merely followed same fabrication method for conventional RO Herein, we introduced novel preparation using spray-assisted nanofiller predeposition to circumvent limitations in methods. The precise...
As soluble catalysts, redox-mediators (RMs) endow mobility to catalysts for unconstrained access tethered solid discharge products, lowering the energy barrier Li2 O2 formation/decomposition; however, this desired is accompanied by undesirable side effect of RM migration Li metal anode. The reaction between RMs and degrades both RMs, leading cell deterioration within a few cycles. To extend cycle life redox-mediated Li-O2 batteries, herein graphene oxide (GO) membranes are reported as...