Article
Chemistry, Multidisciplinary
Yuichiro Nishizawa, Haruka Minato, Takumi Inui, Ikuma Saito, Takuma Kureha, Mitsuhiro Shibayama, Takayuki Uchihashi, Daisuke Suzuki
Summary: In this study, the nanostructure and thermoresponsiveness of pNIPMAm microgels were evaluated using temperature-controllable high-speed atomic force microscopy, revealing a peculiar heterogeneous structure and the impact of adsorption concentration on their thermoresponsiveness. These findings are expected to advance the design of new materials such as thermoresponsive nanosheets and stimuli-responsive coatings.
Article
Biochemistry & Molecular Biology
Qianyu Sun, Tianzhong Yuan, Gang Yang, Daliang Guo, Lizheng Sha, Rendang Yang
Summary: In this study, sustained-release composite microspheres containing curcumin-loaded cyclodextrin metal-organic frameworks (CD-MOFs-Cur) were successfully prepared using a solid-in-oil-in-oil (s/o/o) emulsifying solvent evaporation method. These composite microspheres exhibited different degradation rates and curcumin release rates, and showed favorable cytocompatibility.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Amr M. Emara, Emad M. Elsharma, Islam M. Abdelmonem
Summary: To remove radioactive cesium ions from wastewater, researchers synthesized graft copolymer of chitosan-g-poly(acrylic acid/N-vinylcaprolactam) [CTS-P(AA/VC)]. The copolymer's shape, thermal stability, and structure were characterized using SEM, TGA, and FT-IR. Batch sorption experiments were conducted to evaluate the effects of various parameters on the adsorption process. Kinetics data were analyzed using different models, and the Langmuir and Freundlich equations were used for isotherm modeling. The copolymer showed promising potential in treating cesium-134 ions-containing liquids.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Panjalak Meetam, Kunlarat Phonlakan, Supinya Nijpanich, Surangkhana Budsombat
Summary: Chitosan-grafted-poly(acrylic acid) and chitosan-grafted-poly(2-acrylamido-2-methyl-1-propanesulfonic acid) hydrogels have shown effective adsorption properties for Cu2+ and other heavy metal ions, and can also act as catalysts for reduction reactions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2024)
Article
Biochemistry & Molecular Biology
Maria J. M. Carneiro, Claudio B. A. Paula, Irisvan S. Ribeiro, Lais R. M. de Lima, Fabio O. S. Ribeiro, Durcilene A. Silva, Gisele S. Araujo, Jose D. B. Marinho Filho, Ana J. Araujo, Rosemayre S. Freire, Judith P. A. Feitosa, Regina C. M. de Paula
Summary: Stimulus-responsive nanoparticles with dextran-graft-poly (N-isopropylacrylamide) copolymers synthesized via Schiff base formation show thermal and pH dual responsiveness. Conjugation of doxorubicin to the copolymers results in nanoparticles that exhibit selective release of the drug in tumor cells, demonstrating high cytotoxicity against cancer cells and low toxicity towards non-tumor cells.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Biochemistry & Molecular Biology
Qi Zhou, Weiqing Lan, Jing Xie
Summary: This review provides an in-depth understanding of the structure and biological activity of chitosan and phenolic acid, as well as various synthetic techniques employed in their modification. Phenolic acid-chitosan derivatives exhibit improved physicochemical properties and enhanced antibacterial and antioxidant activities, making them promising for food preservation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2024)
Article
Polymer Science
Maryam Azadbakht, Mehdi Salami-Kalajahi, Elnaz Esmizadeh, Ali Vahidifar
Summary: A new synthetic scheme for graft copolymers was reported, with successful synthesis and investigation of self-assembly behavior in aqueous media with different pH values. The morphology of the obtained supramolecular structures depended on the molecular weight of the backbone and the pH value of the media.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Alessandra Longo, Giovanni Dal Poggetto, Mario Malinconico, Paola Laurienzo, Ernesto Di Maio, Maria Laura Di Lorenzo
Summary: This work presents the enhancement of crystallization rate of poly (L-lactic acid) (PLLA) by introducing optically pure short chain branches. The synthesized graft copolymer demonstrates faster crystallization rate compared to commercial PLLA and a binary blend with the same composition. The short branches play a crucial role in promoting crystal nucleation and growth.
Article
Chemistry, Multidisciplinary
Xiaoyue Zhang, Qingqing Tang, Yang Liao, Hui Gong, Shenwen Fang, Yan Xiong, Ming Duan
Summary: This study investigates the modification of cationic polymers for treating oily wastewater in oil fields. It was found that modifying poly N-(3-dimethylaminopropyl) methacrylamide with polypropylene glycol monomethyl ether resulted in improved flotation efficiency. The synthesized copolymers showed lower stickiness of flocs and temperature and pH sensitivity, making them promising for future applications.
Article
Chemistry, Multidisciplinary
Mingxin Wang, Somia Yassin Hussain Abdalkarim, Ruixin Gong, Haibin Ji, Zhiming Chen, Yunfei Shen, Ying Zhou, Jiayuan Shen, Hou-Yong Yu
Summary: Polymer composite microspheres with excellent biodegradable and controlled long-term release characteristics have gained significant attention. However, producing polymer microspheres with controlled properties and customizable drug release is still a major challenge. In this study, dual-responsive cellulose nanocrystals were engineered and incorporated into polylactide composite microspheres to achieve controlled and sustained drug release behavior. The results demonstrated a temperature and pH dual-responsive controlled drug release capability of the composite microspheres, highlighting their potential as multifunctional drug delivery systems for medical applications.
Article
Food Science & Technology
Guotian Wang, Yunpeng Liu, Huimin Yong, Shuai Zong, Changhai Jin, Jun Liu
Summary: The use of ferulic acid-g-CS coating was found to effectively extend the shelf life of refrigerated pork and improve its quality by providing strong antioxidant and antimicrobial activities.
Article
Polymer Science
Gabriela S. Garcia-Briones, Richard Laga, Zulfiya Cernochova, Carely Arjona-Ruiz, Olga Janouskova, Miroslav Slouf, Ognen Pop-Georgievski, Dana Kubies
Summary: Polyelectrolyte nanoparticles (NPs) have been investigated as carriers for protein delivery. The formation of these NPs was studied using a newly synthesized polycationic diblock copolymer and heparin without the use of additives. The encapsulation of heparin-binding proteins achieved high entrapment efficiency and increased protein stability. The released proteins exhibited sustained release and preserved bioactivity. The NPs showed noncytotoxic performance, making them promising candidates for controlled delivery of bioactive proteins in biomedical applications.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Physical
Yi Zong, Pan Xu, Haoyu Yue, Xinxue Li
Summary: A water-soluble graft-copolymer HPMC-g-poly(AM/AA/APEG2400) was synthesized via free-radical copolymerization and demonstrated improved stability and salt resistance for profile control in high-temperature and high-salinity reservoirs. It also showed potential for hydrogel preparation with tunable gelation time and excellent long-term stability.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Biochemistry & Molecular Biology
Xueyan Li, Shibin Sun, Anle Yang, Xiaoran Li, Zhan Jiang, Shaohua Wu, Fang Zhou
Summary: The objective of this research is to develop composite nanofibers for wound healing by sequentially releasing tannic acid and curcumin drugs. The prepared membrane showed high antibacterial and antioxidant effects, as well as excellent biocompatibility and anti-inflammatory properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Sasan Dan, Maryam Kalantari, Ata Kamyabi, Madjid Soltani
Summary: In this research, chitosan-itaconic acid graft copolymer hydrogel was successfully synthesized with optimized reaction conditions. The structure, morphology, thermal stability, swelling behavior, antibacterial properties, and drug-loading capabilities of the hydrogel were studied and characterized, with successful loading of ciprofloxacin as a model drug.
Article
Chemistry, Medicinal
Soo-Yong Park, Yang H. Yun, Bum-Joon Park, Hyung-Il Seo, Ildoo Chung
Summary: This study fabricated gene carrier nanoparticles with minimal toxicity and high transfection efficiency using a biocompatible and biodegradable polymer. The nanoparticles were evaluated for their potential biological activities and transfection properties, confirming their suitability for gene therapy.
Article
Materials Science, Composites
Taeyoon Kim, Soo-Hyun Kwon, Hye Jin Kim, Choong-Sun Lim, Ildoo Chung, Won-Ki Lee, Bongkuk Seo
Summary: This study successfully prepared a low viscosity nanosilica/epoxy hybrid resin through surface modification and dispersion techniques. The introduction of silica nanoparticles improved the mechanical properties of the nanocomposites, but a high loading amount decreased the impact strength.
COMPOSITE INTERFACES
(2022)
Article
Polymer Science
Da Young Lee, Hye Jin Kim, Hyeon-Gook Kim, Choong-Sun Lim, Ildoo Chung, Bongkuk Seo
Summary: Polyol and polyurethane are synthesized using bisphenol-Z (BPZ) to improve the toughness of epoxy resin. The synthesized material acts as a toughening agent and enhances the mechanical strength and thermal properties of the epoxy resin.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Parvathala Ankoji, N. Suresh Kumar, Chowdam Venkata Prasad, B. Pradeep Raju
Summary: This study presents the synthesis of SrLa1-xAlO4: xDy(3+) (x = 0, 1, 3, and 5 mol%) phosphors via solid-state reaction, and investigates their structural, morphological, and photoluminescence properties. The results reveal that these materials exhibit excellent luminescence and have potential for white light emission.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Polymer Science
Ji-Eun Lee, Seung-Bo Shim, Jae-Hyung Park, Ildoo Chung
Summary: In this study, eco-friendly biocomposites with improved mechanical properties and interfacial interaction were prepared using a cellulose acetate derivative as a polymer matrix and pre-surface-treated natural fibers as biofillers.
Review
Materials Science, Multidisciplinary
Chowdam Venkata Prasad, You Seung Rim
Summary: Beta-Gallium oxide (beta-Ga2O3) has emerged as a promising semiconductor material for power electronic devices due to its ultra-wide bandgap and diverse material systems. This review article discusses recent investigations on the interface engineering of beta-Ga2O3-based power devices, summarizing different methods for improving performances and addressing challenges such as p-type doping difficulty and low thermal conductivity. The study also highlights the potential of ion-cutting process for achieving full potential of beta-Ga2O3 in power electronics.
MATERIALS TODAY PHYSICS
(2022)
Article
Materials Science, Composites
Heekyung Jin, Yong-Zhu Yan, Cheol Seung Lee, Joon-Hee Lee, Ildoo Chung, Chang-Sik Ha
Summary: The CMC/MMT bio-nanocomposite films were prepared by intercalating MMT with POSS to enhance the interfacial interactions and improve properties such as moisture barrier and mechanical strength. The introduction of MOIP effectively enhanced UV-barrier, moisture barrier, antibacterial, and antioxidant properties while maintaining good compatibility and thermal stability.
COMPOSITE INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Wei-Jin Zhang, Shuwei Li, Yong-Zhu Yan, Sung Soo Park, Anandhu Mohan, Ildoo Chung, Suk-kyun Ahn, Jung Rae Kim, Chang-Sik Ha
Summary: In this study, a novel MXene-based nanocarrier was developed for drug delivery, which exhibited excellent drug-loading capacity and encapsulation efficiency. The MXene nanosheets also demonstrated outstanding dual-responsive properties and exhibited excellent antibacterial activity.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Chowdam Venkata Prasad, Joon Hui Park, Ji Young Min, Wonjin Song, Madani Labed, Yusup Jung, Sinsu Kyoung, Sangmo Kim, Nouredine Sengouga, You Seung Rim
Summary: In this study, a p-type copper aluminum oxide (p-CuAlO2) interlayer was proposed for improved breakdown voltage and low leakage current of beta-Ga2O3 Schottky barrier diodes (SBDs). XPS and TEM analysis confirmed the composition and properties of RF sputtered p-CuAlO2 thin films on beta-Ga2O3. Electrical characterization of Pt/beta-Ga2O3 SBD and Pt/p-CuAlO2/beta-Ga2O3 heterojunction (HJ) revealed that the HJ exhibited better rectification behavior, lower leakage current, and higher barrier height compared to the SBD. The p-CuAlO2 interlayer also reduced the interface state density and altered the conduction mechanisms of the SBD and HJ. These findings highlight the potential of p-CuAlO2 as a material for forming heterojunctions with beta-Ga2O3.
MATERIALS TODAY PHYSICS
(2023)
Review
Materials Science, Multidisciplinary
Chowdam Venkata Prasad, Madani Labed, Mohammad Tauquir Alam Shamim Shaikh, Ji Young Min, Tan Hoang Vu Nguyen, Wonjin Song, Kyong Jae Kim, You Seung Rim
Summary: Beta-gallium oxide (beta-Ga2O3) has unique physical properties that make it a desirable option for X-ray detection, scintillators, and harsh environment sensing. However, developing high performance beta-Ga2O3-based X-ray detectors and scintillators remains a challenge.
MATERIALS TODAY PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Madani Labed, Ji Young Min, Eun Seo Jo, Nouredine Sengouga, Chowdam Venkata Prasad, You Seung Rim
Summary: In this study, the effect of different cycle numbers of HfO2 insertion on the forward current, capacitance, and Ni/HfO2/ss-Ga2O3 Schottky barrier height is investigated. It is observed that the Schottky barrier heights extracted from capacitance can be adjusted within the range of 0.54-1.33 eV by increasing the number of atomic layer deposition cycles. Furthermore, increasing HfO2 cycle numbers can reduce the Fermi pinning level effect and control the Schottky barrier height easily in a wide range from 1.05 to 1.48 eV.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Ji-Eun Lee, Jin-Woo Lee, Jae-Wang Ko, Kyung-Il Jo, Hyun-Ju Park, Ildoo Chung
Summary: The need for a resource circulation economy is emerging due to the development of eco-friendly industrial groups, especially in the plastics field. Recycling of thermoplastic elastomers without cross-link has rapidly developed the industry. The thermal and mechanical performances of TPEE blends were evaluated by manufacturing compounds and adding recycled resin and additives.
Article
Materials Science, Multidisciplinary
Chowdam Venkata Prasad, Madani Labed, Mohammad Tauquir Alam Shamim Shaikh, Ji Young Min, Tan Hoang Vu Nguyen, Wonjin Song, Jang Hyeok Park, Kyong Jae Kim, Sangmo Kim, Sinsu Kyoung, Nouredine Sengouga, You Seung Rim
Summary: By controlling the oxygen flow rate, a p-type copper aluminum oxide (p-CuAlO2) interlayer was used to enhance the high breakdown and low leakage current for 0-Ga2O3-based power devices. The AFM measurements showed that increasing the oxygen flow rate led to an increase in film roughness due to defects/oxygen vacancy. XPS and TEM analysis validated the surface compositions, chemical states, band offsets and microstructural properties of the p-CuAlO2/0-Ga2O3 heterojunctions. The electrical and carrier transport properties of the heterojunction were studied using I-V and C-V techniques.
MATERIALS TODAY ADVANCES
(2023)
Article
Physics, Condensed Matter
Madani Labed, Ji Young Min, Amina Ben Slim, Nouredine Sengouga, Chowdam Venkata Prasad, Sinsu Kyoung, You Seung Rim
Summary: W/β-Ga2O3 Schottky barrier diodes prepared using a magnetic field-based sputtering method were studied at different temperatures. The Schottky barrier height increased with temperature and reached 1.03 eV at room temperature. The ideality factor decreased with temperature and was higher than 2 at 100K due to the tunneling effect. The series and on-resistances decreased with increasing temperature. High interfacial dislocation density was observed, indicating the dominance of tunneling through dislocation in the transport mechanism. These findings are helpful for designing better performance devices.
JOURNAL OF SEMICONDUCTORS
(2023)
Article
Engineering, Electrical & Electronic
Madani Labed, Ji Young Min, Eun Seo Jo, Nouredine Sengouga, Chowdam Venkata Prasad, You Seung Rim
Summary: Achieving precise control of the Schottky barrier height and minimizing Fermi-level pinning effect are crucial factors in designing high-performance Schottky barrier diodes. In this work, the effect of insertion of HfO2 with different cycle numbers on forward current, capacitance, and Ni/HfO2/ss-Ga2O3 Schottky barrier height is discussed. It was observed that the Schottky barrier height can be adjusted and increased by repeated atomic layer deposition cycles of HfO2. The increase in HfO2 cycle numbers also reduced the Fermi pinning level effect and allowed for easy control of the Schottky barrier height. The forward current was found to be highly dependent on the HfO2 cycle number.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
