Article
Chemistry, Physical
Swati Achra, Tomoki Akimoto, Jean-Francois de Marneffe, Stefanie Sergeant, Xiangyu Wu, Thomas Nuytten, Steven Brems, Inge Asselberghs, Zsolt Tokei, Kazuyoshi Ueno, Marc Heyns
Summary: This study successfully demonstrates the use of downstream Ar/H2 plasma treatment to effectively clean graphene surfaces, improving charge transfer efficiency at the graphene-metal interface and reducing resistance. It is found that hydrogen plasma treatment results in n-doping in single layer graphene and an increase in defect density.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Jiayi Zou, Ziyi Liu, Yan Ge, Jiangyi Ding, Mingjie Nie, Zhicheng Miao, Zhihong Yang, Yunhui Wang, Lan Bi
Summary: This study investigates the hydrogen storage performance of boron-doped graphene modified with beryllium or vanadium metal, using density functional theory. The results show that boron doping effectively improves the hydrogen storage capacity of the system, with B-22-PG exhibiting higher capacity.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Yongfeng Qu, Jijun Ding, Haiwei Fu, Haixia Chen, Jianhong Peng
Summary: The study systematically investigates the doping effect of boron and sulfur atoms on the electronic and adsorption properties of graphene through density functional theory simulations. The results show that the ratio of B and S atom doping determines the type of conductivity exhibited by graphene, with a ratio less than 2 resulting in n-type and higher ratios leading to p-type conductivity. Additionally, the role of vacancy defects in graphene and the transformation behavior from p to n-type induced by increasing S atom doping are highlighted.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Bing Lu, Shiyong Wang, Lin Zhao, Dandan Zhou, Shuangshi Dong, Gang Wang
Summary: In order to mitigate the negative impact of aquatic organism eutrophication, the removal of phosphate has become an urgent need. La-CAU-17 shows higher phosphate adsorption capacity and a wider pH range, demonstrating better phosphate affinity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Xiankun Wu, Jia-Yin Zhang, Lin-Sen Zhou, Rong Guan, Wen-Tao Zheng, Zi-Qi Tian, Kuan Huang, Fujian Liu
Summary: In this study, a unique method was developed to synthesize mesoporous graphene with high nitrogen content for efficient SO2 capture. The material showed high SO2 uptake and selectivity, making it promising for gas separation applications. DFT calculations and BOMD simulations provided theoretical basis for understanding the adsorption mechanism.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Patrick J. Edwards, Sean Stuart, James T. Farmer, Ran Shi, Run Long, Oleg V. Prezhdo, Vitaly V. Kresin
Summary: Nanostructured electronic devices, like graphene-based ones, can be fully metallized while the insulating substrate remains coverage-free when exposed to small size-selected silver nanoparticles. This effect is due to the low binding energy between metal nanoparticles and a contaminant-free passivated silica surface. It provides insight into nanoparticle adhesion and has practical applications in deposition of metallic layers on device working surfaces, eliminating the need for masking and extensive pre- and post-processing.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Multidisciplinary Sciences
Fei Li, Jiuyi Zhu, Pengzhan Sun, Mingrui Zhang, Zhenqing Li, Dingxin Xu, Xinyu Gong, Xiaolong Zou, A. K. Geim, Yang Su, Hui-Ming Cheng
Summary: This study demonstrates the excellent performance of reduced graphene oxide (rGO) in extracting gold from e-waste, even at minute concentrations. By controlling the protonation of the oxidized regions of rGO, gold can be extracted exclusively, without contamination by other elements.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yuexin Liu, Dongchen Shen, Zhengkai Tu, Lu Xing, Yongchul G. Chung, Song Li
Summary: Metal-organic framework/graphene oxide (MOF/GO) composites have been investigated for their hydrogen storage performance. The research shows that MOF/GO composites based on small-pore MOFs exhibit enhanced hydrogen storage capacity, while those based on large-pore MOFs show decreased capacity. The study also found that the introduction of lithium ions (Li+) can affect the hydrogen storage capacity, with low Li+ loading improving capacity and high Li+ loading reducing capacity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yingying Xing, Di Li, Longhua Li, Huamei Tong, Deli Jiang, Weidong Shi
Summary: This study proposes a Mn/N co-doping strategy to enhance the alkaline hydrogen evolution activity of Co9S8 nanowires array, reducing the water dissociation barrier significantly. The optimized Mn-N-Co9S8 catalyst shows remarkably improved activity compared to other doping methods in 1 M KOH solution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Li-Juan Ma, Jianfeng Wang, Jianfeng Jia, Hai-Shun Wu
Summary: In this study, defects and interstitial B are utilized to enhance the stability and H2 dissociation ability of palladium nanoparticles supported by graphene. The results indicate that defects can effectively avoid the desorption competition between palladium nanoparticles and hydrogen molecules, and the introduction of interstitial B can decrease the energy barrier for hydrogen dissociation on the surface.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Analytical
Fengxiang Wang, Xinyang Fu, Xinyue Chai, Qiming Han, Hua Wang, Qingli Hao
Summary: Nitrogen-doped graphene quantum dots (N-GQDs) with blue fluorescence and excellent water-solubility were prepared, and a fluorimetric method using N-GQDs probe for detecting 4-NP was developed successfully, showing the feasible detection of trace 4-NP in complicated environmental water samples and expected to be applied for highly selective determination of 4-NP.
MICROCHEMICAL JOURNAL
(2021)
Article
Engineering, Environmental
Hui Wang, Liang Shan, Wen Shi, Ming Wang, Guixiang Quan, Zourui Wang, Liqiang Cui, Jinlong Yan
Summary: Developing economic and efficient adsorbents is crucial for removing antibiotic residuals from contaminated water. Nitrogen-doped porous graphene-like carbon (NPGC) adsorbents were successfully synthesized and showed a high removal capacity for TC. The adsorption mechanism of TC onto N-doped carbon adsorbents was systematically studied, and NPGC demonstrated potential environmental application, including anti-interference capacity and reusability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Chenchen Li, Ding Jiang, Xuping Yang, Arman Amani Babadi, Shuang Wang, Xun Gong
Summary: The study aims to use seaweed-derived biochar as a substrate to selectively adsorb carbonyl compounds from bio-oil in order to address its thermal instability and low heating value caused by its high oxygen content. The interaction between acetone and different nitrogen-rich seaweed-derived carbon models were analyzed using density functional theory. The results provide insights into the adsorption mechanism of seaweed biochar and offer a new approach to reducing the oxygen content of bio-oil and improving its quality.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Materials Science, Multidisciplinary
Suki N. Zhang, Michael C. Brothers, Daniel Sim, Yen H. Ngo, Steve S. Kim
Summary: A selective nitrogen dioxide (NO2) sensor was developed using WSe2 material with an added oil layer as a filter, achieving selective detection of NO2 while filtering out other confounding gases.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Shulin Yang, Shunlin Xie, Lun Tan, Gui Lei, Huoxi Xu, Zhigao Lan, Zhao Wang, Haoshuang Gu
Summary: The study investigates the selective gas adsorption/sensing performance of W-doped graphene through density functional theory calculations. It is found that W-doped graphene has a stronger interaction with H-2 compared to other gases. The electric field can enhance or weaken the adsorption of H-2, making W-doped graphene a promising material for selective and tunable H-2 adsorption/sensing.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Yohan Ko, Youbin Kim, Chanyong Lee, Taemin Kim, Seungkyu Kim, Yong Ju Yun, Hui-jeong Gwon, Nam-Ho Lee, Yongseok Jun
Article
Chemistry, Multidisciplinary
Ho-Jong Kim, Yong Ju Yun, Sam Nyung Yi, Soo Kyung Chang, Dong Han Ha
Review
Chemistry, Multidisciplinary
Kim-Hung Huynh, Eunil Hahm, Mi Suk Noh, Jong-Hwan Lee, Xuan-Hung Pham, Sang Hun Lee, Jaehi Kim, Won-Yeop Rho, Hyejin Chang, Dong Min Kim, Ahruem Baek, Dong-Eun Kim, Dae Hong Jeong, Seung-min Park, Bong-Hyun Jun
Summary: Magnetic plasmonic particles (MPPs) serve as an advanced SERS detection platform with synergistic effects of magnetic and plasmonic properties, offering functions such as separation, drug delivery, and therapeutic applications. Literature explores the structure and multifunctionality of MPPs, enabling novel applications in various biological fields.
Article
Multidisciplinary Sciences
Ji-Yong Kim, Yong Ju Yun, Joshua Jeong, C-Yoon Kim, Klaus-Robert Muller, Seong-Whan Lee
Summary: The study introduces a homeostatic cellulose biosensor inspired by leaf homeostasis, which provides protection, sensation, self-regulation, and biosafety functions. Researchers found that a mesoporous cellulose membrane can transform into a homeostatic material with high ion conductivity, excellent flexibility, stability, appropriate adhesion force, and self-healing effects when swollen in a saline solution. This biosensor is capable of maintaining a stable skin-sensor interface through homeostasis, even under various stresses like a dynamic environment, severe detachment, dense hair, sweat, and long-term measurement. Additionally, the biosensor shows high usability for continuous and stable measurement of electrophysiological signals in brain-computer interfacing applications, demonstrating unprecedented versatility beyond the laboratory.
Article
Chemistry, Analytical
Hyung-Mo Kim, Jaehi Kim, Sungje Bock, Jaehyun An, Yun-Sik Choi, Xuan-Hung Pham, Myeong Geun Cha, Bomi Seong, Wooyeon Kim, Yoon-Hee Kim, Hobeom Song, Jung-Won Kim, Seung-min Park, Sang Hun Lee, Won-Yeop Rho, Sangchul Lee, Dae Hong Jeong, Ho-Young Lee, Bong-Hyun Jun
Summary: PSA is a well-known biomarker for early prostate cancer diagnosis, and the application of SiO2@Ag@SiO2 NPs on the LFIA platform shows potential for early diagnosis. By optimizing silica-coated silver-assembled silica nanoparticles, the PSA detection limit was lowered to 1.1 ng/mL, allowing successful detection of clinical samples.
Article
Chemistry, Multidisciplinary
Sungje Bock, Hyung-Mo Kim, Jaehi Kim, Jaehyun An, Yun-Sik Choi, Xuan-Hung Pham, Ahla Jo, Kyeong-min Ham, Hobeom Song, Jung-Won Kim, Eunil Hahm, Won-Yeop Rho, Sang Hun Lee, Seung-min Park, Sangchul Lee, Dae Hong Jeong, Ho-Young Lee, Bong-Hyun Jun
Summary: A highly sensitive LFIA kit using QD-embedded silica nanoparticles was developed for the diagnosis of prostate cancer, which can be conducted through a smartphone and image processing software.
Article
Materials Science, Multidisciplinary
Hyun Joo Lee, Won G. Hong, Hee Yeon Yang, Dong Han Ha, Yongseok Jun, Yong Ju Yun
Summary: The wearable UV monitoring patch uses a highly sensitive graphene sensor and multifunctional fabric patch to monitor UVA levels in real-time, demonstrating high sensitivity and long-term stability.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Yohan Ko, Taemin Kim, Chanyong Lee, Changhyun Lee, Yong Ju Yun, Yongseok Jun
Summary: This study investigates the role of electron transport layers in perovskite solar cells and finds that manipulating oxygen vacancies in the TiO2 underlayer can improve device performance. In-depth electronic investigations reveal the importance of the electronic properties at the interface between the TiO2 and SnO2 layers.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Won Ki Son, Yun Sik Choi, Young Woo Han, Dong Wook Shin, Kyunghun Min, Jiyoung Shin, Min Jeong Lee, Hokyoung Son, Dae Hong Jeong, Seon-Yeong Kwak
Summary: When plants are stressed, they release molecules to activate their defense system. Detecting these molecules can help address stress conditions and prevent the development of diseases. In this study, a non-destructive surface-enhanced Raman scattering (SERS)-based nanoprobe is developed for real-time detection of stress-related molecules in living plants. The nanoprobe, placed in the intercellular space, consists of a Si nanosphere surrounded by a corrugated Ag shell modified by a water-soluble cationic polymer. The nanosensors successfully monitor stress-related molecules in different plants, indicating the possible onset of a plant disease. Plasmonic nanosensor platforms could enable early diagnosis of stress and contribute to timely disease management in plants.
NATURE NANOTECHNOLOGY
(2023)
Article
Chemistry, Applied
Kyunghun Kim, Sungjun Kwak, Mi Sook Cho, Dae Hong Jeong
Summary: We developed a spectroscopic detection method using surface-enhanced Raman spectroscopy (SERS) and a metal-coordinated tethering method. By modifying a gold nanofilm (AuNF) surface with hydroxyl groups and forming a metal ion-mediated dye ligand complex (Al3+-shikonin dye complex), we were able to detect dye molecules. The SERS enhancement factor (EF) of AuNP-on-AuNF was calculated to be 4.4 x 107. This method is versatile and can be applied to various natural dyes, allowing for direct comparison with dyes tethered on fibers.
Article
Materials Science, Multidisciplinary
Hyun Joo Lee, Bokyeong Ryu, Dong Keon Lee, Hyung Ju Park, Chul Huh, Dong Ick Son, Dong Han Ha, C-Yoon Kim, Yongseok Jun, Yong Ju Yun
Summary: In this study, soft and implantable cracked reduced graphene oxide-based electro-mechanical strain sensors were developed for monitoring internal tissue or organ dynamics. These sensors exhibit high linear sensitivity, good mechanical and chemical stability, and proper biological compatibility. They can reliably measure strain associated with in vivo dynamic cardiac activity and assess preclinical cardiovascular drugs.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Education & Educational Research
Mi Hyun Son, Wanchul Lim, Jeongwoo Son, Dae Hong Jeong
Summary: This study examines the suitability and characteristics of middle school inquiry activities in the 2015 National Curriculum of Science in Korea. Based on interviews with eight experienced science teachers, problems in conducting inquiry classes were identified. These problems were categorized into five areas, including inquiry level, method, tool, inquiry result, difficulty in guidance, and safety. The study suggests several strategies for an inquiry improvement plan, such as emphasizing quantitative inquiry and providing concrete guidance for non-major science teachers.
ASIA-PACIFIC SCIENCE EDUCATION
(2022)
Article
Engineering, Electrical & Electronic
Hong Ryeol Na, Hyun Joo Lee, Jae Ho Jeon, Han-Jin Kim, Sahng-Kyoon Jerng, Sanjib Baran Roy, Seung-Hyun Chun, Sunghun Lee, Yong Ju Yun
Summary: This research demonstrates the potential of vertical graphene resistive strain sensors with high sensitivity, durability, and resilience for multifunctional applications.
NPJ FLEXIBLE ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Hyun Joo Lee, Chanyong Lee, Juhee Song, Yong Ju Yun, Yongseok Jun, Chil Seong Ah
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Chemistry, Physical
Yohan Ko, Youbin Kim, Lee Chanyong, Ye Chan Kim, Byoung Koun Min, Hui-jeong Gwon, Yong Ju Yun, Yongseok Jun
ACS APPLIED ENERGY MATERIALS
(2020)
