Biography:

In the past Won Jun Lee has collaborated on articles with Nam Ju Lim and Joonwon Lim. One of their most recent publications is Interfacially-grafted single-walled carbon nanotube / poly (vinyl alcohol) composite fibers. Which was published in journal Carbon.

More information about Won Jun Lee research including statistics on their citations can be found on their Copernicus Academic profile page.

Won Jun Lee's Articles: (4)

Interfacially-grafted single-walled carbon nanotube / poly (vinyl alcohol) composite fibers

AbstractNanocomposites are critically influenced by interfacial interactions between the reinforcement and matrix. Polyvinyl alcohol (PVOH) of varying molecular weights were prepared and grafted-to single-walled carbon nanotubes (SWCNTs), to improve the interfacial interaction with a homopolymer PVOH matrix. Nanocomposite fibers were coagulation spun across a broad range of loading fractions, controlled by the spinning dope composition. An intermediate grafted-PVOH molecular weight (10 kDa) maximized grafting ratio, and the final composite mechanical performance; the positive effects were attributed to the increased degree of dispersion of the SWCNTs in the dope, as well as the favorable interface. The PVOH grafting increased the stability of the SWCNT loading fractions (up to 45 wt.%), offering increased strength (up to 1100 MPa) and stiffness (up to 38.5 GPa); at the same time, strain-to-failures remained high (up to 23.3%), resulting in high toughness (up to 125 J g−1).

A meta decision support system approach to coordinating production/marketing decisions

AbstractThis paper deals with the problem of coordinating production and marketing functions that are traditionally in conflict with each other. Our main concern is to develop a decision support system (DSS) for coordinating the two functions in a functionally decentralized firm where each function has information autonomy and makes its own decisions separately with respect to its own local objective function. Previous studies in literature fail to provide practically useful coordination frameworks. Based on coordination theory, this paper proposes a Meta DSS (MDSS) approach which can effectively solve the problem of coordinating production and marketing decisions. The MDSS framework we propose is capable of providing guidance for coordinating production and marketing decisions. An example is presented to illustrate the usefulness of the proposed MDSS approach.

A combination of Korean mistletoe extract and resistance exercise retarded the decline in muscle mass and strength in the elderly: A randomized controlled trial

Highlights•We tested impact of KME on declines in muscle mass and strength in the elderly.•Muscle mass, knee strength, and balance ability improved with KME supplementation.•IGF1R, atrogin-1, and myogenin were involved in the modulating effect of KME.

Open porous graphene nanoribbon hydrogel via additive-free interfacial self-assembly: Fast mass transport electrodes for high-performance biosensing and energy storage

AbstractCustomized assembly of nanomaterials into three-dimensional macroscopic objects may offer versatile functional nanostructures. Gelation is a common route to this end, but unstable assembly of typical one-dimensional nanomaterials arising from their non-flat geometry of weakly interacting building blocks has remained a significant challenge. We report versatile reliable open nanoporous graphene nanoribbon hydrogel formation via straightforward interfacial layer-by-layer self-assembly. Atomically flat surface of graphene nanoribbon enables a stable gelation, overcoming the geometrical penalty of one-dimensional building blocks. The resultant hydrogel readily provides compact open porous web-like gel framework along with a wide range of controllability in the engineering of surface functionality, composite preparation and three-dimensional customized morphology formation. Large surface area and open porosity of the synergistic hydrogel structure simultaneously attain fast responsivity and high sensitivity in enzymatic biosensor application as well as fast rate capability and high capacitance in supercapacitor application.

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