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Dr. Hyun Chan Kim
Inha University, Incheon, South Korea

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Research Keywords & Expertise

0 Microfabrication
0 Nanocellulose
0 Optical applications
0 Nanocarbon
0 Sensor and actuators

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Nanocellulose

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Short Biography

Hyun Chan Kim is a postdoctoral research fellow of the CRC for Nanocellulose Future Composites, Inha University. His research interests are nanocellulose-based functional and structural composites.

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Article
Published: 30 August 2021 in Few-Body Systems
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We study heavy baryon productions, \(\pi + p \rightarrow D^{*-} (\text {or }K^{*0}) + Y\), where Y is a charmed (or strange) baryon of the ground or excited states. We propose a new production mechanism where two quarks in the baryon participate in the reaction (the two-quark process), which enables the excitation of both the \(\rho \) and \(\lambda \) modes of the baryons. This feature differs from the one-quark process in the previous study, which excites only \( \lambda \) modes. We consider the two-quark process with the vector Reggeon exchange and the two-quark interaction inspired by the instanton model to study one vector meson and one heavy baryon productions. We compare the production rates of the ground states, the \(\rho \)- and \(\lambda \)-mode excitations of strange and charmed baryons for forward-angle scattering. We discuss structure and momentum transfer dependence of the production rates. We show that in the two-quark process both \(\lambda \) and \(\rho \) modes are abundantly produced unlike the one-quark process.

ACS Style

Sang-In Shim; Atsushi Hosaka; Hyun-Chul Kim. Pion Induced Productions for the Study of Heavy Baryons. Few-Body Systems 2021, 62, 1 -5.

AMA Style

Sang-In Shim, Atsushi Hosaka, Hyun-Chul Kim. Pion Induced Productions for the Study of Heavy Baryons. Few-Body Systems. 2021; 62 (4):1-5.

Chicago/Turabian Style

Sang-In Shim; Atsushi Hosaka; Hyun-Chul Kim. 2021. "Pion Induced Productions for the Study of Heavy Baryons." Few-Body Systems 62, no. 4: 1-5.

Article
Published: 30 July 2021 in Physical Review D
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We investigate the production of the hidden-charm pentaquark Pcs0(4459) with strangeness in the K−p→J/ψΛ reaction, employing two different theoretical frameworks, i.e., the effective Lagrangian method and the Regge approach. Having determined all relevant coupling constants, we are able to compute the total and differential cross sections for the K−p→J/ψΛ reaction. We examine the contributions of Pcs with different sets of spin-parity quantum number assigned. The present results may give a guide for possible future experiments.

ACS Style

Samson Clymton; Hee-Jin Kim; Hyun-Chul Kim. Production of hidden-charm strange pentaquarks Pcs from the K−p→J/ψΛ reaction. Physical Review D 2021, 104, 014023 .

AMA Style

Samson Clymton, Hee-Jin Kim, Hyun-Chul Kim. Production of hidden-charm strange pentaquarks Pcs from the K−p→J/ψΛ reaction. Physical Review D. 2021; 104 (1):014023.

Chicago/Turabian Style

Samson Clymton; Hee-Jin Kim; Hyun-Chul Kim. 2021. "Production of hidden-charm strange pentaquarks Pcs from the K−p→J/ψΛ reaction." Physical Review D 104, no. 1: 014023.

Journal article
Published: 22 July 2021 in Crystals
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Nanocellulose (NC) has been spotlighted as a new building block of future materials since it has many advantages, such as being lightweight and environment-friendly and having high mechanical properties and heat resistance. However, the use of NC requires an upscale manufacturing process to maintain its advantageous properties. Herein, the process of assembling NC into a macro-scale bulk material was developed through a combination of steam treatment and hot press molding. The steam treatment was applied to an NC paste to energize the hydroxyl groups in the cellulose, followed by two stages of hot press molding, which helped in the self-assembly of NC without adhesives. Cellulose nanocrystals were used as the NC, and circular disk shape specimens were prepared. The mechanical properties of the prepared bulk material were higher than typical engineering plastics. In addition, an end mill machining test of the NC bulk material showed its machinability. This paper showed the processing feasibility of NC bulk material, which can substitute plastics.

ACS Style

Jung-Woong Kim; Hyun-Chan Kim; Lindong Zhai; Dickens Agumba; Jaehwan Kim. Nanocellulose Bulk Material Prepared by Steam Treatment and Hot Press Molding: Material Processing and Machining Test. Crystals 2021, 11, 853 .

AMA Style

Jung-Woong Kim, Hyun-Chan Kim, Lindong Zhai, Dickens Agumba, Jaehwan Kim. Nanocellulose Bulk Material Prepared by Steam Treatment and Hot Press Molding: Material Processing and Machining Test. Crystals. 2021; 11 (8):853.

Chicago/Turabian Style

Jung-Woong Kim; Hyun-Chan Kim; Lindong Zhai; Dickens Agumba; Jaehwan Kim. 2021. "Nanocellulose Bulk Material Prepared by Steam Treatment and Hot Press Molding: Material Processing and Machining Test." Crystals 11, no. 8: 853.

Article
Published: 07 June 2021 in Physical Review C
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We investigate the properties of baryonic matter within the framework of the in-medium modified chiral soliton model by taking into account the effects of surrounding baryonic environment on the properties of in-medium baryons. The internal parameters of the model are determined based on nuclear phenomenology at nonstrange sector and fitted by reproducing nuclear matter properties near the saturation point. We discuss the equations of state in different nuclear environments such as symmetric nuclear matter, neutron, and strange matters. We show that the results for the equations of state are in good agreement with the phenomenology of nuclear matter. We also discuss how the SU(3) baryons masses undergo changes in these various types of nuclear matter.

ACS Style

Nam-Yong Ghim; Ghil-Seok Yang; Hyun-Chul Kim; Ulugbek Yakhshiev. Baryonic matter and the medium modification of the baryon masses. Physical Review C 2021, 103, 064306 .

AMA Style

Nam-Yong Ghim, Ghil-Seok Yang, Hyun-Chul Kim, Ulugbek Yakhshiev. Baryonic matter and the medium modification of the baryon masses. Physical Review C. 2021; 103 (6):064306.

Chicago/Turabian Style

Nam-Yong Ghim; Ghil-Seok Yang; Hyun-Chul Kim; Ulugbek Yakhshiev. 2021. "Baryonic matter and the medium modification of the baryon masses." Physical Review C 103, no. 6: 064306.

Journal article
Published: 27 May 2021 in Nanomaterials
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This paper reports a genuine environment-friendly hybrid nanocomposite made by growing zinc oxide (ZnO) nanorods on cellulose nanofiber (CNF) film. The nanocomposite preparation, characterizations, electromechanical property, and ultraviolet (UV) sensing performance are explained. CNF was extracted from the pulp by combining the 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation and the aqueous counter collision (ACC) methods. The CNF film was fabricated using doctor blade casting, and ZnO nanorods were grown on the CNF film by seeding and by a hydrothermal method. Morphologies, optical transparency, mechanical and electromechanical properties, and UV sensing properties were examined. The nanocomposite’s optical transparency was more than 80%, and the piezoelectric charge constant d31 was 200 times larger than the CNF film. The UV sensing performance of the prepared ZnO-CNF nanocomposites was tested in terms of ZnO concentration, UV irradiance intensity, exposure side, and electrode materials. A large aspect ratio of ZnO nanorods and a work function gap between ZnO nanorods and the electrode material are essential for improving the UV sensing performance. However, these conditions should be compromised with transparency. The use of CNF for ZnO-cellulose hybrid nanocomposite is beneficial not only for electromechanical and UV sensing properties but also for high mechanical properties, renewability, biocompatibility, flexibility, non-toxicity, and transparency.

ACS Style

Lindong Zhai; Hyun-Chan Kim; Ruth Muthoka; Muhammad Latif; Hussein Alrobei; Rizwan Malik; Jaehwan Kim. Environment-Friendly Zinc Oxide Nanorods-Grown Cellulose Nanofiber Nanocomposite and Its Electromechanical and UV Sensing Behaviors. Nanomaterials 2021, 11, 1419 .

AMA Style

Lindong Zhai, Hyun-Chan Kim, Ruth Muthoka, Muhammad Latif, Hussein Alrobei, Rizwan Malik, Jaehwan Kim. Environment-Friendly Zinc Oxide Nanorods-Grown Cellulose Nanofiber Nanocomposite and Its Electromechanical and UV Sensing Behaviors. Nanomaterials. 2021; 11 (6):1419.

Chicago/Turabian Style

Lindong Zhai; Hyun-Chan Kim; Ruth Muthoka; Muhammad Latif; Hussein Alrobei; Rizwan Malik; Jaehwan Kim. 2021. "Environment-Friendly Zinc Oxide Nanorods-Grown Cellulose Nanofiber Nanocomposite and Its Electromechanical and UV Sensing Behaviors." Nanomaterials 11, no. 6: 1419.

Regular paper
Published: 17 May 2021 in International Journal of Precision Engineering and Manufacturing-Green Technology
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Conventionally, the photon sieve (PS) was made of chrome-coated fused silica and quartz plates. However, fused silica and quartz plates have a size limitation due to their weight and fragility. A membrane PS is attractive since it is lightweight, large size, flexibility and deployable. This paper demonstrates the new concept of membrane PS based on cellulose nanofiber (CNF). The CNF-based PS (CNF-PS) is transparent, flexible, lightweight, and has high strength and toughness. This study highlights the PS fabrication on a CNF film using a micro-nano structure molding technique and its structural stability in an external environmental change. For the first time in literature, through a high vacuum (5 × 10–8 Torr) environment test, it was shown that CNF has emerged as a promising optical material. Furthermore, the prepared CNF-PS exhibited high beam quality. This study explained the complete research strategy from the isolation of cellulose nanofibers to its PS application. The new concept of CNF-PS will accelerate its broad application to thin and compact photonic devices.

ACS Style

Hyun Chan Kim; Lindong Zhai; Pooja S. Panicker; David MacDonnell; Jaehwan Kim. Transparent and Flexible Photon Sieve Made with Cellulose Nanofiber by Micro-Nano Structure Molding. International Journal of Precision Engineering and Manufacturing-Green Technology 2021, 1 -11.

AMA Style

Hyun Chan Kim, Lindong Zhai, Pooja S. Panicker, David MacDonnell, Jaehwan Kim. Transparent and Flexible Photon Sieve Made with Cellulose Nanofiber by Micro-Nano Structure Molding. International Journal of Precision Engineering and Manufacturing-Green Technology. 2021; ():1-11.

Chicago/Turabian Style

Hyun Chan Kim; Lindong Zhai; Pooja S. Panicker; David MacDonnell; Jaehwan Kim. 2021. "Transparent and Flexible Photon Sieve Made with Cellulose Nanofiber by Micro-Nano Structure Molding." International Journal of Precision Engineering and Manufacturing-Green Technology , no. : 1-11.

Article
Published: 28 April 2021 in Physical Review D
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We investigate the electromagnetic transitions of the singly charmed baryons with spin 3/2, based on a pion mean-field approach, also known as the chiral quark-soliton model, taking into account the rotational 1/Nc corrections and the effects of flavor SU(3) symmetry breaking. We examine the valence- and sea-quark contributions to the electromagnetic transition form factors and find that the quadrupole form factors of the sea-quark contributions dominate over those of the valence-quark ones in the smaller Q2 region, whereas the sea quarks only provide marginal contributions to the magnetic dipole transition form factors of the baryon sextet with spin 3/2. The effects of the flavor SU(3) symmetry breaking are in general very small except for the forbidden transition Ξc0γ→Ξc*0 by U-spin symmetry. We also discuss the widths of the radiative decays for the baryon sextet with spin 3/2, comparing the present results with those from other works.

ACS Style

June-Young Kim; Hyun-Chul Kim; Ghil-Seok Yang; Makoto Oka. Electromagnetic transitions of the singly charmed baryons with spin 3/2. Physical Review D 2021, 103, 074025 .

AMA Style

June-Young Kim, Hyun-Chul Kim, Ghil-Seok Yang, Makoto Oka. Electromagnetic transitions of the singly charmed baryons with spin 3/2. Physical Review D. 2021; 103 (7):074025.

Chicago/Turabian Style

June-Young Kim; Hyun-Chul Kim; Ghil-Seok Yang; Makoto Oka. 2021. "Electromagnetic transitions of the singly charmed baryons with spin 3/2." Physical Review D 103, no. 7: 074025.

Review
Published: 05 April 2021 in Polymers
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By increasing the environmental concerns and depletion of petroleum resources, bio-based resins have gained interest. Recently, lignin, vanillin (4-hydroxy-3-methoxybenzaldehyde), and divanillin (6,6′-dihydroxy-5,5′-dimethoxybiphenyl-3,3′-dicarbaldehyde)-based resins have attracted attention due to the low cost, environmental benefits, good thermal stability, excellent mechanical properties, and suitability for high-performance natural fiber composite applications. This review highlights the recent use of lignin, vanillin, and divanillin-based resins with natural fiber composites and their synthesized processes. Finally, discussions are made on the curing kinetics, mechanical properties, flame retardancy, and bio-based resins’ adhesion property.

ACS Style

Bijender Kumar; Dickens Agumba; Duc Pham; Muhammad Latif; Dinesh; Hyun Kim; Hussein Alrobei; Jaehwan Kim. Recent Research Progress on Lignin-Derived Resins for Natural Fiber Composite Applications. Polymers 2021, 13, 1162 .

AMA Style

Bijender Kumar, Dickens Agumba, Duc Pham, Muhammad Latif, Dinesh, Hyun Kim, Hussein Alrobei, Jaehwan Kim. Recent Research Progress on Lignin-Derived Resins for Natural Fiber Composite Applications. Polymers. 2021; 13 (7):1162.

Chicago/Turabian Style

Bijender Kumar; Dickens Agumba; Duc Pham; Muhammad Latif; Dinesh; Hyun Kim; Hussein Alrobei; Jaehwan Kim. 2021. "Recent Research Progress on Lignin-Derived Resins for Natural Fiber Composite Applications." Polymers 13, no. 7: 1162.

Journal article
Published: 03 April 2021 in Composites Science and Technology
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This paper reports an aligned cellulose nanofiber (CNF) composite that exhibits flexibility, transparency, and improved mechanical and piezoelectric properties. The aligned CNF composite was made by electrospinning CNF-polyvinyl alcohol (PVA) blend, followed by casting CNF suspension. The CNF-PVA blend was electrospun to form a CNF-PVA fiber mat, and an optimum CNF-PVA ratio and the spinning parameters were determined by examining CNF alignment. Then, the electrospun CNF-PVA mat was coated with CNF suspension to fabricate the aligned CNF composite. The aligned CNF composite was transparent (85.3%) and had a higher orientation index (α = 0.54) than a neat CNF film. Besides, the composite showed improved mechanical properties. In consequence of CNF alignment, the piezoelectric charge constant, d31 of the composite was 14.5 pC/N, which was more than double of the neat CNF film. With this piezoelectric behavior, the composite was applied to a vibration energy harvester (VEH), and it showed an output power of 5.43 nW. All about the piezoelectric and mechanical property improvement were explained in this paper. The aligned CNF composite is flexible, lightweight, environment-friendly, and low-cost.

ACS Style

Eun Sik Choi; Hyun Chan Kim; Ruth M. Muthoka; Pooja S. Panicker; Dickens O. Agumba; Jaehwan Kim. Aligned cellulose nanofiber composite made with electrospinning of cellulose nanofiber - Polyvinyl alcohol and its vibration energy harvesting. Composites Science and Technology 2021, 209, 108795 .

AMA Style

Eun Sik Choi, Hyun Chan Kim, Ruth M. Muthoka, Pooja S. Panicker, Dickens O. Agumba, Jaehwan Kim. Aligned cellulose nanofiber composite made with electrospinning of cellulose nanofiber - Polyvinyl alcohol and its vibration energy harvesting. Composites Science and Technology. 2021; 209 ():108795.

Chicago/Turabian Style

Eun Sik Choi; Hyun Chan Kim; Ruth M. Muthoka; Pooja S. Panicker; Dickens O. Agumba; Jaehwan Kim. 2021. "Aligned cellulose nanofiber composite made with electrospinning of cellulose nanofiber - Polyvinyl alcohol and its vibration energy harvesting." Composites Science and Technology 209, no. : 108795.

Journal article
Published: 30 March 2021 in Nanomaterials
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Here, we report the fabrication and characterization of cellulose nanofiber (CNF)-based nanocomposite films reinforced with zinc oxide nanorods (ZnOs) and grapefruit seed extract (GSE). The CNF is isolated via a combination of chemical and physical methods, and the ZnO is prepared using a simple precipitation method. The ZnO and GSE are used as functional nanofillers to produce a CNF/ZnO/GSE film. Physical (morphology, chemical interactions, optical, mechanical, thermal stability, etc.) and functional (antimicrobial and antioxidant activities) film properties are tested. The incorporation of ZnO and GSE does not impact the crystalline structure, mechanical properties, or thermal stability of the CNF film. Nanocomposite films are highly transparent with improved ultraviolet blocking and vapor barrier properties. Moreover, the films exhibit effective antimicrobial and antioxidant actions. CNF/ZnO/GSE nanocomposite films with better quality and superior functional properties have many possibilities for active food packaging use.

ACS Style

Swarup Roy; Hyun Kim; Pooja Panicker; Jong-Whan Rhim; Jaehwan Kim. Cellulose Nanofiber-Based Nanocomposite Films Reinforced with Zinc Oxide Nanorods and Grapefruit Seed Extract. Nanomaterials 2021, 11, 877 .

AMA Style

Swarup Roy, Hyun Kim, Pooja Panicker, Jong-Whan Rhim, Jaehwan Kim. Cellulose Nanofiber-Based Nanocomposite Films Reinforced with Zinc Oxide Nanorods and Grapefruit Seed Extract. Nanomaterials. 2021; 11 (4):877.

Chicago/Turabian Style

Swarup Roy; Hyun Kim; Pooja Panicker; Jong-Whan Rhim; Jaehwan Kim. 2021. "Cellulose Nanofiber-Based Nanocomposite Films Reinforced with Zinc Oxide Nanorods and Grapefruit Seed Extract." Nanomaterials 11, no. 4: 877.

Article
Published: 12 January 2021 in Physical Review D
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We investigate the strong force fields and stabilities of the nucleon and the singly heavy baryon Σc within the framework of the chiral quark-soliton model. Having constructed the pion mean fields in the presence of the Nc−1 level quarks self-consistently, we are able to examine the gravitational form factors of Σc. We mainly focus in the present work on the stability conditions for both the nucleon and Σc and discuss the strong force fields and their physical implications. We also present the results for the gravitational form factors and relevant observables, emphasizing the difference between the nucleon and Σc.

ACS Style

June-Young Kim; Hyun-Chul Kim; Maxim V. Polyakov; Hyeon-Dong Son. Strong force fields and stabilities of the nucleon and singly heavy baryon Σc. Physical Review D 2021, 103, 014015 .

AMA Style

June-Young Kim, Hyun-Chul Kim, Maxim V. Polyakov, Hyeon-Dong Son. Strong force fields and stabilities of the nucleon and singly heavy baryon Σc. Physical Review D. 2021; 103 (1):014015.

Chicago/Turabian Style

June-Young Kim; Hyun-Chul Kim; Maxim V. Polyakov; Hyeon-Dong Son. 2021. "Strong force fields and stabilities of the nucleon and singly heavy baryon Σc." Physical Review D 103, no. 1: 014015.

Journal article
Published: 11 January 2021 in Polymers
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A chitosan-based nanocomposite film with tannic acid (TA) as a cross-linker and titanium dioxide nanoparticles (TiO2) as a reinforcing agent was developed with a solution casting technique. TA and TiO2 are biocompatible with chitosan, and this paper studied the synergistic effect of the cross-linker and the reinforcing agent. The addition of TA enhanced the ultraviolet blocking and mechanical properties of the chitosan-based nanocomposite film. The reinforcement of TiO2 in chitosan/TA further improved the nanocomposite film’s mechanical properties compared to the neat chitosan or chitosan/TA film. The thermal stability of the chitosan-based nanocomposite film was slightly enhanced, whereas the swelling ratio decreased. Interestingly, its water vapor barrier property was also significantly increased. The developed chitosan-based nanocomposite film showed potent antioxidant activity, and it is promising for active food packaging.

ACS Style

Swarup Roy; Lindong Zhai; Hyun Chan Kim; Duc Hoa Pham; Hussein Alrobei; Jaehwan Kim. Tannic-Acid-Cross-Linked and TiO2-Nanoparticle-Reinforced Chitosan-Based Nanocomposite Film. Polymers 2021, 13, 228 .

AMA Style

Swarup Roy, Lindong Zhai, Hyun Chan Kim, Duc Hoa Pham, Hussein Alrobei, Jaehwan Kim. Tannic-Acid-Cross-Linked and TiO2-Nanoparticle-Reinforced Chitosan-Based Nanocomposite Film. Polymers. 2021; 13 (2):228.

Chicago/Turabian Style

Swarup Roy; Lindong Zhai; Hyun Chan Kim; Duc Hoa Pham; Hussein Alrobei; Jaehwan Kim. 2021. "Tannic-Acid-Cross-Linked and TiO2-Nanoparticle-Reinforced Chitosan-Based Nanocomposite Film." Polymers 13, no. 2: 228.

Journal article
Published: 26 October 2020 in Crystals
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In the present investigation, we prepared cellulose nanocrystal (CNC)-reinforced polyvinyl alcohol-cellulose (PVA-Cell) physical hydrogels using a simple blending method for actuator application. The prepared hydrogels were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and the surface and cross-section were studied by scanning electron microscopy. CNCs were well dispersed in the PVA-Cell hydrogel. In the preparation process, surface hydroxyl groups of the CNC and PVA-Cell matrix hydroxyl groups were interacted to produce uniform dispersion of CNCs in the hydrogels. Swelling behavior and compression studies revealed that the increase of the CNCs reinforced the crosslinking. The actuation test of the prepared hydrogels showed that the displacement linearly increased with the voltage, and the immense output displacement was observed at low CNC concentration. The prepared hydrogels are applicable for soft robot actuators and active lens.

ACS Style

Jaehwan Kim; Tippabattini Jayaramudu; Lindong Zhai; Hyun Kim; Dickens Agumba. Preparation of Cellulose Nanocrystal-Reinforced Physical Hydrogels for Actuator Application. Crystals 2020, 10, 969 .

AMA Style

Jaehwan Kim, Tippabattini Jayaramudu, Lindong Zhai, Hyun Kim, Dickens Agumba. Preparation of Cellulose Nanocrystal-Reinforced Physical Hydrogels for Actuator Application. Crystals. 2020; 10 (11):969.

Chicago/Turabian Style

Jaehwan Kim; Tippabattini Jayaramudu; Lindong Zhai; Hyun Kim; Dickens Agumba. 2020. "Preparation of Cellulose Nanocrystal-Reinforced Physical Hydrogels for Actuator Application." Crystals 10, no. 11: 969.

Article
Published: 14 September 2020 in Physical Review D
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The axial-vector form factors and axial-vector constants of the baryon decuplet are investigated within a pion mean-field approach, which is also known as the chiral quark-soliton model. Given an axial-vector current with a specified flavor, there are four different form factors of a decuplet baryon. When we consider the singlet, triplet, and octet axial-vector currents, we have twelve different form factors for each member of the baryon decuplet. We compute all these axial-vector form factors of the baryon decuplet, taking into account the rotational 1/Nc corrections and effects of flavor SU(3) symmetry breaking. We find that, for a given flavor, two of the form factors for a decuplet baryon are only independent within the present approach. We first examine properties of the axial-vector form factors of the Δ+ isobar and Ω− hyperon. We also compare the results of the triplet axial-vector form factors of Δ+ with those from lattice QCD and those of the present work for the axial-vector constants of the baryon decuplet with the lattice data. All the results for other members of the baryon decuplet are then presented. The results of the axial charges are compared with those of other works. The axial masses and axial radii are also discussed.

ACS Style

Yu-Son Jun; Jung-Min Suh; Hyun-Chul Kim. Axial-vector form factors of the baryon decuplet with flavor SU(3) symmetry breaking. Physical Review D 2020, 102, 054011 .

AMA Style

Yu-Son Jun, Jung-Min Suh, Hyun-Chul Kim. Axial-vector form factors of the baryon decuplet with flavor SU(3) symmetry breaking. Physical Review D. 2020; 102 (5):054011.

Chicago/Turabian Style

Yu-Son Jun; Jung-Min Suh; Hyun-Chul Kim. 2020. "Axial-vector form factors of the baryon decuplet with flavor SU(3) symmetry breaking." Physical Review D 102, no. 5: 054011.

Journal article
Published: 04 September 2020 in Nanomaterials
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This paper reports that, by simply blending two heterogeneous polysaccharide nanofibers, namely chitosan nanofiber (ChNF) and cellulose nanofiber (CNF), a ChNF–CNF composite was prepared, which exhibited improved mechanical properties and antioxidant activity. ChNF was isolated using the aqueous counter collision (ACC) method, while CNF was isolated using the combination of TEMPO oxidation and the ACC method, which resulted in smaller size of CNF than that of ChNF. The prepared composite was characterized in terms of morphologies, FT-IR, UV visible, thermal stability, mechanical properties, hygroscopic behaviors, and antioxidant activity. The composite was flexible enough to be bent without cracking. Better UV-light protection was shown at higher content of ChNF in the composite. The high ChNF content showed the highest antioxidant activity in the composite. It is the first time that a simple combination of ChNF–CNF composites fabrication showed good mechanical properties and antioxidant activities. In this study, the reinforcement effect of the composite was addressed. The ChNF–CNF composite is promising for active food packaging application.

ACS Style

Le Hai; Lindong Zhai; Hyun Kim; Pooja Panicker; Duc Pham; Jaehwan Kim. Chitosan Nanofiber and Cellulose Nanofiber Blended Composite Applicable for Active Food Packaging. Nanomaterials 2020, 10, 1752 .

AMA Style

Le Hai, Lindong Zhai, Hyun Kim, Pooja Panicker, Duc Pham, Jaehwan Kim. Chitosan Nanofiber and Cellulose Nanofiber Blended Composite Applicable for Active Food Packaging. Nanomaterials. 2020; 10 (9):1752.

Chicago/Turabian Style

Le Hai; Lindong Zhai; Hyun Kim; Pooja Panicker; Duc Pham; Jaehwan Kim. 2020. "Chitosan Nanofiber and Cellulose Nanofiber Blended Composite Applicable for Active Food Packaging." Nanomaterials 10, no. 9: 1752.

Short communication
Published: 21 July 2020 in Physics Letters B
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We study the isospin mass differences of singly heavy baryons, based on a pion mean-field approach. We consider both the electromagnetic interactions and the hadronic contributions that arise from the mass difference of the up and down quarks. The relevant parameters have been already fixed by the baryon octet. In addition, we introduce the strong hyperfine interactions between the light quarks inside a chiral soliton and the Coulomb interactions between the chiral soliton and a heavy quark. The numerical results are in good agreement with the experimental data. In particular, the results for the neutral mass relations, which contain only the electromagnetic contributions, are in remarkable agreement with the data, which implies that the pion mean field approach provides a good description of the singly heavy baryons.

ACS Style

Ghil-Seok Yang; Hyun-Chul Kim. Isospin mass differences of singly heavy baryons. Physics Letters B 2020, 808, 135619 .

AMA Style

Ghil-Seok Yang, Hyun-Chul Kim. Isospin mass differences of singly heavy baryons. Physics Letters B. 2020; 808 ():135619.

Chicago/Turabian Style

Ghil-Seok Yang; Hyun-Chul Kim. 2020. "Isospin mass differences of singly heavy baryons." Physics Letters B 808, no. : 135619.

Article
Published: 16 July 2020 in Physical Review D
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We investigate the σ and ρ coupling constants for the DD and D*D* interactions, based on correlated 2π exchange in the DD and D*D* interactions. Starting from the DD¯→ππ and D*D¯*→ππ amplitudes derived in the pseudophysical region (4mπ2≤t≤52mπ2) with the S- and P-wave 2π correlations considered, we obtain the spectral functions for the DD→DD and D*D*→D*D* amplitude with correlated S- and P-wave 2π exchanges. Using the pole approximation, we estimate the DDσ, DDρ, D*D*σ, and D*D*ρ coupling constants. We extended phenomenologically the present results to the region in t≤0 and compare them with those from lattice QCD. The results are also compared with those of other models. We also present the results of the BBσ, BBρ, B*B*σ, and B*B*ρ coupling constants. We observe that it is unlikely that the σ and ρ coupling constants for the B and B* mesons are the same as those for the D and D* mesons. On the contrary, they are quite larger than those for the charmed mesons.

ACS Style

Hee-Jin Kim; Hyun-Chul Kim. σ and ρ coupling constants for the charmed and beauty mesons. Physical Review D 2020, 102, 014026 .

AMA Style

Hee-Jin Kim, Hyun-Chul Kim. σ and ρ coupling constants for the charmed and beauty mesons. Physical Review D. 2020; 102 (1):014026.

Chicago/Turabian Style

Hee-Jin Kim; Hyun-Chul Kim. 2020. "σ and ρ coupling constants for the charmed and beauty mesons." Physical Review D 102, no. 1: 014026.

Journal article
Published: 06 February 2020 in Materials Today Communications
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The featured work reports the preparation, characterization and various properties of melanin nanoparticle (MNP) reinforced cellulose nanofiber (CNF) based nanocomposite films. The CNF was extracted using a combination of chemical and physical methods. The MNP was isolated from a natural source sepia ink by following a simple centrifugation technique and used as a functional nanofiller to fabricate the CNF/MNP nanocomposite films. The prepared nanocomposite films were characterized in terms of morphology, structure, chemical interactions, optical properties, surface hydrophobicity, mechanical properties, thermal stability and antioxidant activity. The MNP was shown to be evenly dispersed in the CNF matrix and biocompatible with cellulose matrix to form the nanocomposite films. Incorporation of MNP enhanced the ultraviolet blocking, mechanical properties, hydrophobicity and water vapor barrier properties of the nanocomposite films. The developed nanocomposite films also showed strong antioxidant activity. The crystalline structure, crystallinity and thermal stability of the nanocomposite films were not affected meaningfully. The sepia ink isolated MNP has a very good prospective to be used as a nanofiller for the preparation of CNF based nanocomposite films.

ACS Style

Swarup Roy; Hyun Chan Kim; Jung Woong Kim; Lindong Zhai; Qin Yu Zhu; Jaehwan Kim. Incorporation of melanin nanoparticles improves UV-shielding, mechanical and antioxidant properties of cellulose nanofiber based nanocomposite films. Materials Today Communications 2020, 24, 100984 .

AMA Style

Swarup Roy, Hyun Chan Kim, Jung Woong Kim, Lindong Zhai, Qin Yu Zhu, Jaehwan Kim. Incorporation of melanin nanoparticles improves UV-shielding, mechanical and antioxidant properties of cellulose nanofiber based nanocomposite films. Materials Today Communications. 2020; 24 ():100984.

Chicago/Turabian Style

Swarup Roy; Hyun Chan Kim; Jung Woong Kim; Lindong Zhai; Qin Yu Zhu; Jaehwan Kim. 2020. "Incorporation of melanin nanoparticles improves UV-shielding, mechanical and antioxidant properties of cellulose nanofiber based nanocomposite films." Materials Today Communications 24, no. : 100984.

Journal article
Published: 05 February 2020 in Materials
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Cellulose nanofiber (CNF) exhibits excellent mechanical properties, which has been extensively proven through experimental techniques. However, understanding the mechanisms and the inherent structural behavior of cellulose is important in its vastly growing research areas of applications. This study focuses on taking a look into what happens to the atomic molecular interactions of CNF, mainly hydrogen bond, in the presence of external force. This paper investigates the hydrogen bond disparity within CNF structure. To achieve this, molecular dynamics simulations of cellulose I β nanofibers are carried out in equilibrated conditions in water using GROMACS software in conjunction with OPLS-AA force field. It is noted that the hydrogen bonds within the CNF are disrupted when a pulling force is applied. The simulated Young’s modulus of CNF is found to be 161 GPa. A simulated shear within the cellulose chains presents a trend with more hydrogen bond disruptions at higher forces.

ACS Style

Ruth M. Muthoka; Hyun Chan Kim; Jung Woong Kim; Lindong Zhai; Pooja S. Panicker; Jaehwan Kim. Steered Pull Simulation to Determine Nanomechanical Properties of Cellulose Nanofiber. Materials 2020, 13, 710 .

AMA Style

Ruth M. Muthoka, Hyun Chan Kim, Jung Woong Kim, Lindong Zhai, Pooja S. Panicker, Jaehwan Kim. Steered Pull Simulation to Determine Nanomechanical Properties of Cellulose Nanofiber. Materials. 2020; 13 (3):710.

Chicago/Turabian Style

Ruth M. Muthoka; Hyun Chan Kim; Jung Woong Kim; Lindong Zhai; Pooja S. Panicker; Jaehwan Kim. 2020. "Steered Pull Simulation to Determine Nanomechanical Properties of Cellulose Nanofiber." Materials 13, no. 3: 710.

Review article
Published: 27 January 2020 in Progress in Materials Science
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In recent years, there have been significant advances on materials development for additive manufacturing (AM) applications. However, the use of composites or nanocomposite materials for improved performance and multifunctionality are still limited. This review paper attempts to provide a comprehensive review of both commercially available materials as well as research activities related to recent progress on high-performance polymer nanocomposites that are being used in various AM techniques. Four AM techniques including Fused Filament Fabrication (FFF), Selective Laser Sintering (SLS), Multi Jet Fusion (MJF), and Stereolithography (SLA) are discussed. The development of printable polymer composites especially polymer nanocomposites is rapidly expanding the AM materials portfolio, which makes the production of multifunctional parts with complex structures possible.

ACS Style

H. Wu; W.P. Fahy; S. Kim; H. Kim; Nanzhu Zhao; L. Pilato; A. Kafi; S. Bateman; J.H. Koo. Recent developments in polymers/polymer nanocomposites for additive manufacturing. Progress in Materials Science 2020, 111, 100638 .

AMA Style

H. Wu, W.P. Fahy, S. Kim, H. Kim, Nanzhu Zhao, L. Pilato, A. Kafi, S. Bateman, J.H. Koo. Recent developments in polymers/polymer nanocomposites for additive manufacturing. Progress in Materials Science. 2020; 111 ():100638.

Chicago/Turabian Style

H. Wu; W.P. Fahy; S. Kim; H. Kim; Nanzhu Zhao; L. Pilato; A. Kafi; S. Bateman; J.H. Koo. 2020. "Recent developments in polymers/polymer nanocomposites for additive manufacturing." Progress in Materials Science 111, no. : 100638.