Article
Chemistry, Physical
Qilin Chang, Cuiping Li, Jing Sui, Geoffrey I. N. Waterhouse, Zhi-Ming Zhang, Liang-mi Yu
Summary: Ni/Ni3ZnC0.7 modified alginate-derived carbon composites were successfully prepared by constructing a Ni2+-Zn2+-alginate gel, followed by freeze-drying and carbonization processes, showing improved EMW absorption properties with a maximum reflection loss of -40.2 dB and an effective absorption bandwidth of 5.4 GHz.
Article
Chemistry, Physical
Chang Liu, Zhihui Zeng, Jing Qiao, Qilei Wu, Wei Liu, Feng Gao, Jiurong Liu
Summary: This research efficiently utilizes sustainable cellulose nanofibril (CNF) to facilitate the preparation of ultralight, high-porosity carbon nanotube (CNT) hybrid aerogel-based electromagnetic wave (EMW) absorbers. CNF not only acts as a green surfactant to prevent CNT agglomeration, but also functions as a supporting matrix or binder to construct porous CNT-based aerogels. The resulting hybrid aerogels exhibit highly promising EMW absorption performance, outperforming other reported CNT-based EMW absorbers.
Article
Nanoscience & Nanotechnology
Zirui Jia, Xiaoyi Zhang, Zheng Gu, Guanglei Wu
Summary: Ni-Co/PC composite is prepared by introducing metal Co element with Ni-MOF/PC as precursor. Then a series of Ni-Co bimetal/PC composites are prepared by polyaniline coating, oxidation reaction, and vulcanization reaction. It is found that vulcanization reaction was the best path for the electromagnetic wave absorption performance of the product. The minimum reflection loss (RLmin) of NiCo2S4/PC composite reaches - 67.81 dB at the sample thickness of 2.6 mm, and the maximum effective absorption bandwidth (EAB) reaches 6.16 GHz when the sample thickness is 2.1 mm. NiCo2S4/PC composite is an ideal electromagnetic wave absorber due to its excellent electrical conductivity, rich surface, and high attenuation capability.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Materials Science, Composites
Baigang Han, Yan Wang, Yinsong Zheng, Yongxiang Tao, Xiao Liu
Summary: This study investigates the effects of different levels of multi-walled carbon nanotube (MWCNT) content on the electromagnetic wave absorption and mechanical properties of MWCNT/polyamide 12 (PA12) composites. It is found that the addition of MWCNT can increase the flexural strength but decrease the impact strength, tensile strength, and volume resistivity of the composite. The best impedance matching is achieved with a 10 wt% MWCNT content, resulting in the lowest reflection loss. The composite also exhibits superior mechanical properties compared to pure PA12.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Physical
Lifu Sun, Qianqian Zhu, Zirui Jia, Zhiqiang Guo, Wanru Zhao, Guanglei Wu
Summary: Compared with other absorption materials, multicomponent carbon nanotubes composite materials have become increasingly important in the preparation of high-performance electromagnetic wave absorption materials due to their unique dielectric-magnetic advantages. In this paper, an excellent performance of Co/Cu/CrN/CNTs composite materials was prepared by the heating and disintegration of organic amine salt to achieve the restoration of oxides while derivating carbon nanotubes. Due to annealing, slim-shaped CrN evenly attached to the surface of carbon nanotubes. The material forms a rich interface and good impedance matching characteristics, thereby realizing the excellent electromagnetic wave absorption performance of the material.
Review
Chemistry, Physical
Rajesh Kumar, Sumanta Sahoo, Ednan Joanni, Rajesh K. Singh, Wai Kian Tan, Kamal K. Kar, Atsunori Matsuda
Summary: The demand for electromagnetic interference (EMI) shielding has risen significantly due to rapid developments in the electronics industry. New materials like carbon-based nanostructures, polymers, and MXene-based 2D layered materials are being explored as alternatives to conventional metal sheets for EMI shielding, offering advantages such as low weight, cost-effectiveness, and good thermal/electrical properties. Composite materials combining polymers with conducting carbon fillers have potential as EM wave absorbers, while MXene-based materials have garnered attention for their application in EMI shielding.
Article
Nanoscience & Nanotechnology
Xulei Wu, Kang Liu, Junwen Ding, Bojun Zheng, Feng Gao, Kun Qian, Yuanyuan Ma, Yuming Feng, Lu Chen, Peng Zhang, Huatao Wang
Summary: High efficiency and broad bandwidth wave absorption materials are urgently needed in daily life. In this study, we have synthesized sucrose-derived carbon-based hybrid absorbers decorated with a series of Ni-based alloys. The results show that the Ni-based alloys decorated sucrose-derived carbon hybrid have outstanding electromagnetic wave absorption performance with wide effective bandwidth and low reflection loss.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Chemistry, Physical
Qianqian Ren, Linwei Yao, Yushu Sun, Hongyang Zhu, Yingnan Wang, Han Zhang, Jiangni Yun, Junfeng Yan, Zhiyong Zhang, Wu Zhao
Summary: In this study, 2D-1D SnO/CNT nanohybrids were successfully prepared by a hydrothermal method and exhibited excellent electromagnetic wave absorption properties. The SnO/CNT hybrids achieved a minimum reflection loss of -68.83 dB (1.44 mm) and a maximum effective absorption bandwidth of 4.53 GHz (12.71-17.24 GHz, 1.49 mm). Density functional theory calculations confirmed the excellent electromagnetic wave loss ability of SnO/CNT, which can be attributed to rich dipole polarization, interface polarization, and good conduction loss.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Jie Liu, Guodong Wang, Chunmiao Liu, Yanchun Tong, Chang Liu, Haibin Sun, Shigang Wu, Yujun Zhao, Xue Guo, Yurun Feng
Summary: A lightweight and efficient electromagnetic waves absorbing material, the biomass porous carbon/polymer-derived composite ceramics, was prepared using sorghum straw as the matrix and combining acetylacetone nickel and polysilazane. The addition of 2% acetylacetone nickel and 30% filler content resulted in strong response to electromagnetic waves. The material exhibited a minimum reflection loss of -69.44 dB at a thickness of 1.33 mm and an effective absorption bandwidth of 4.27 GHz (13.73-18 GHz) at 1.49 mm. The introduction of Ni2Si effectively adjusted impedance matching and enhanced the electromagnetic wave absorbing properties.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Baigang Han, Yan Wang
Summary: Fused filament fabrication (FFF) is used to fabricate electromagnetic wave (EMW) absorbers with different microstructures using recovered polyamide 12 (PA12) substrate and multi-walled carbon nanotubes (MWCNT) filler. Simulation calculations and modeling were performed using CST software to study the EMW absorption characteristics. The pyramid structure demonstrated the best performance at an angle of 28 degrees.
Article
Engineering, Multidisciplinary
Xiaoran Wang, Qinghua Li, Haoxin Lai, Yu Peng, Shilang Xu
Summary: This study presents a metastructure for cement composites based on carbon nanotube periodic gratings, which exhibits excellent microwave absorption performance. By adjusting factors such as grating periodicity, filling fraction, and cement dielectric thickness, multiband or broadband absorption properties are achieved. This research not only provides an effective method for achieving broadband absorption in cement composites, but also proposes novel candidates for the dielectric of metamaterial absorbers.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Physical
Jie Liu, Yurun Feng, Chunmiao Liu, Yanchun Tong, Haibin Sun, Hui Peng, Shigang Wu, Junbin Lu, Hongyu Gong, Xue Guo, Jiao Li
Summary: The study successfully prepared SiBCN composite fibers with strong electromagnetic wave absorption performance at a lower preparation temperature, showing good absorption performance and promising applications in the field of EMW absorption materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Xinci Zhang, Zhibo Zhao, Jia Xu, Qiuyun Ouyang, Chunling Zhu, Xiaoli Zhang, Xitian Zhang, Yujin Chen
Summary: By utilizing the multifunctional material CoFe@N-CNT/rGO, excellent performance in rechargeable Zn-air battery and electromagnetic wave absorption can be achieved.
Article
Engineering, Environmental
Yongxin Qian, Yang Tao, Wang Li, You Li, Tian Xu, Jinian Hao, Qinghui Jiang, Yubo Luo, Junyou Yang
Summary: The combination of efficient heat dissipation and anti-electromagnetic-interference in electronic packaging materials is achieved by filling 3D CNF@C-Ni network skeleton in epoxy resins. The dual-functionated epoxy resin shows great potential in manufacturing highly integrated electronic devices.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Yanqin Wang, Yunlong Yang, Miao Miao, Xin Feng
Summary: Highly efficient electromagnetic wave absorption materials with excellent thermal management are urgently needed to solve the problem of electromagnetic pollution. In this study, bead-curtain-like carbon nanotube arrays@cobalt (CNT As@Co) hybrids are designed to enhance the EMW absorption performance. The CNT As@Co-500 sample with an ultra-low filler loading of 2 wt% exhibits optimal EMW absorption properties, with a minimum reflection loss of -36.86 dB at a thickness of 5.5 mm and an effective absorption bandwidth of 5.78 GHz with a thickness of 2.5 mm. This work provides a new paradigm for designing high-performance 3D EMW absorbers with multifunctionality in electronic devices.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Byungchul Kang, Taeyeong Kong, Ho Jin Ryu, Soon Hyung Hong
Summary: The AlxCrNbVMo high-entropy alloys exhibited superior mechanical properties with a homogeneous microstructure and high yield strength at both 25 and 1000 degrees C, attributed to solid solution strengthening mechanism.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Mikyung Shin, Jae Hyuk Choi, Keumyeon Kim, Soomi Kim, Haeshin Lee
Summary: This study introduced a self-sealing hemostatic needle inspired by mussel adhesive polysaccharide, chitosan-catechol, with the self-sealing time for complete hemostasis depending on the oxidation pathway of the conjugated catechol. High-temperature oxidation weakens the attachment force on the needle surface, facilitating transfer to hemorrhaging sites, while low-temperature oxidation strengthens the attachment force, leading to continued bleeding.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Sunghwan Jin, Byungchul Kang, Taeyeong Kong, Soon Hyung Hong, Hyung-Joon Shin, Rodney S. Ruoff
Summary: Abnormal grain growth was observed in polycrystalline iron foil after plastic deformation, leading to large regions close to single crystal during annealing process. The number of nuclei and maximum grain size for abnormal grain growth were highly affected by plastic deformation conditions, resulting in different stored energies in the foil.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Jeehee Lee, Eunsook Park, Aki Fujisawa, Haeshin Lee
Summary: The study reports the conversion of hydrogel to elastomer using natural porous particles called diatom frustule silica, resulting in a hybrid gel with reversible compressibility and high stretchability. The hybrid composite gel demonstrated potential therapeutic applications for pressure-induced ulcers.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Jingxian Wu, Honggeun Shin, Jeehee Lee, Soomi Kim, Haeshin Lee
Summary: In this study, a gelatin derivative gelatin-catechol (Gel-C) was developed to optimize its properties such as thermal reversibility and injectability. Gel-C showed temperature-dependent gelation capability and could form irreversible hydrogels without external stimuli. By controlling temperature and pH, the properties of Gel-C hydrogels could be manipulated, and an in situ gelling system for drug delivery was successfully fabricated by lowering the local temperature with cold shock, showing promising potential for targeted molecular delivery.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Juhee Lee, Yoo Kyung Kang, Eonju Oh, Juhee Jeong, San Hae Im, Duk Ki Kim, Haeshin Lee, Sang-Gyu Kim, Keehoon Jung, Hyun Jung Chung
Summary: The study presents a cancer gene therapy strategy based on NanoRNP that efficiently blocks the PD-L1 immune checkpoint and induces an antitumor effect in vivo without the need for combination therapy. In vivo results demonstrate that NanoRNP can induce indels in target cells at high frequencies, significantly suppressing tumor growth.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Siwon Yu, Yun Hyeong Hwang, Kang Taek Lee, Sang Ouk Kim, Jun Yeon Hwang, Soon Hyung Hong
Summary: 3D printing of fiber-reinforced composites with biomimetic micro/macrofibril-like hierarchical structure enhances toughness and mechanical properties through interfacial heterogeneity. Addition of a small amount of short fiber significantly increases strength and modulus in the composites.
Article
Nanoscience & Nanotechnology
Jaewon Ju, Subin Jin, Sumin Kim, Jae Hyuk Choi, Haesung A. Lee, Donghee Son, Haeshin Lee, Mikyung Shin
Summary: A transparent hemostatic film consisting of gallol-conjugated chitosan (CHI-G) has been developed to address the challenge of phenolic oxidation in long-term storage of hemostatic materials. The film undergoes a phase transition from solid to injectable hydrogels at physiological pH, allowing efficient stoppage of internal and external hemorrhage. The folded microstructure of the polymer with optimal gallol modification and the initial phase of either a solution state or a solid film play important roles in the hemostatic capability of the CHI-G hydrogels.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Biomedical
Jeehee Lee, Eunsook Park, Kyueui Lee, Mikyung Shin, Soohyeon Lee, Miguel Angel Moreno-Villaecija, Haeshin Lee
Summary: Plants release phenolic molecules for protection, and we designed an adhesive sealant inspired by the phenol-saccharide interactions in plant defense systems. By screening different saccharides, the O-acetyl group in glucomannan showed strong binding with tannic acid. This interaction exhibited pH and temperature sensitivities and could be used to prepare materials of various dimensions for printing techniques.
ACTA BIOMATERIALIA
(2023)
Article
Chemistry, Multidisciplinary
Jingxian Wu, Jaemeun Lee, Joo Young Jung, Jeong Ho Hwang, Ki-Suk Kim, Mikyung Shin, Haeshin Lee, Sun-Hyun Park
Summary: Blood vessel anastomosis by suture is a commonly used life-saving technique, but it is time-consuming and labor-intensive. This study proposes practical less-suture strategies using adhesive films for anastomosis, which reduces the number of stitches required and saves operating time. The decreased stitches also help alleviate fibrosis-mediated wall-thickening. This strategy is particularly useful for emergency situations and anastomosis of small-diameter vessels.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yu Ri Nam, Helen H. Ju, Jeehee Lee, Daiheon Lee, Yoojin Kim, Sung Jin Lee, Hong Kee Kim, Jae-Hyung Jang, Haeshin Lee
Summary: Recently, AAV therapy for incurable diseases has been introduced due to its safety properties and neutralizing antibodies. However, the mixture of empty and full capsids in AAV production increases viral doses to humans. TEM, the primary tool for distinguishing between empty and full capsids, creates research limitations. This study demonstrates that AFM can be an alternative tool to TEM, allowing the distinct height and morphological differences between empty and full AAV particles.
Article
Engineering, Biomedical
Maria P. P. Sousa, Catarina T. T. Passos, Marian Fuersatz, Haeshin Lee, Sonia G. Patricio, Joao F. Mano, Sylvia Nuernberger
Summary: Articular cartilage injuries are a major health concern due to their limited self-renewal capacity, leading to increased economic burden in the healthcare system. The development of cell implantation strategies using a suitable delivery platform holds promise for increasing cell retention and providing sufficient cells for cartilage repair. This study reports the development of anisotropically patterned mussel-inspired membranes with nanotopography and catechol molecular cues for efficient cell delivery. The membranes demonstrate successful cell migration and retention on cartilage surfaces, making them a promising strategy for cell-based therapies.
ADVANCED NANOBIOMED RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Jisoo Shin, Soohwan An, Soojeong Choi, Mikyung Shin, Jung Seung Lee, Jung Ho Cho, Haeshin Lee, Seung-Woo Cho
Summary: This study highlights the important role of ferritin in the self-healing lifetime of soft phenolic materials. Ferritin interacts with a catechol-functionalized polymer to form a self-healable and adhesive hydrogel bidirectionally by providing and retrieving Fe3+. The unique role of ferritin in storing and releasing iron significantly increases the self-healing lifetime of the hydrogel compared to direct Fe3+ addition without ferritin. Ferritin also induces stable oxidative coupling between catechol moieties, contributing to double cross-linking networks and broadening the versatility of phenolic hydrogels in biomedical applications.
Article
Multidisciplinary Sciences
Jun Sung Kim, Sang-Kyu Park, Haeshin Lee
Summary: Additive manufacturing, or 3D printing, has revolutionized object creation, but it may lead to increased local defects compared to traditional casting methods. Factors like light intensity and temperature fluctuations contribute to defect formations. Detecting and locating toxic sources in 3D printed materials is a challenge, and current toxicological assessments rely on passive detection. Introducing the nematode model organism, C. elegans, offers an active system for identification and localization due to its unique sensing and locomotion capabilities.
Article
Chemistry, Multidisciplinary
Jongmin Park, Eunsook Park, Siyoung Q. Choi, Jingxian Wu, Jihye Park, Hyeonju Lee, Hyungjun Kim, Haeshin Lee, Myungeun Seo
Summary: Bioadhesives are becoming increasingly important in medical science. However, developing adhesive materials that combine strong adhesion, biocompatibility, and biodegradation remains challenging. In this study, a biocompatible and biodegradable block copolymer-based waterborne superglue was developed for follicle-free hair transplantation. The adhesive showed step-wise increase in adhesion strength and significantly enhanced mechanical properties compared to the conventional formulation.
