Article
Nanoscience & Nanotechnology
Wei Zhao, Abhilash Sugunan, Thomas Gillgren, Johan A. Larsson, Zhi-Bin Zhang, Shi-Li Zhang, Jens Sommertune, Illia Dobryden, Anwar Ahniyaz
Summary: This study demonstrates a single coating formulation for multifunctional composites in the packaging industry, providing a gas barrier against both oxygen and water vapor. The starch-graphene composite films made from a surfactant-free starch nanoparticle-stabilized graphene dispersion showed a decrease in oxygen and water vapor permeability by over 70% under various humidity conditions, while also being foldable and electrically conductive. This surfactant-free approach of incorporating graphene into an industrially important biopolymer offers a cost-effective and water-based solution for deposition of multifunctional composite films for a range of applications, such as gas barriers in food packaging.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Wanzhen Xu, Wenjie Zhu, Junliang Shen, Mingyue Kuai, Yi Zhang, Weihong Huang, Wenming Yang, Mengmeng Li, Sheng Yang
Summary: Graphene oxide (GO) has various applications in energy devices, biomedicine, environmental protection, and composite materials. A stepwise electrochemical method for fast GO preparation is reported, which involves spontaneous persulfate intercalation and anodic electrolytic oxidation. This method avoids uneven intercalation and insufficient oxidation, significantly shortening the overall duration, and resulting in GO with higher oxygen content and enhanced adsorption capacity compared to traditional methods.
Article
Chemistry, Physical
Jiaxi Zeng, Xiaoli Zhao, Hongbin Lu
Summary: This study demonstrates a liquid-phase sewing strategy to construct carbon foams (CFs) directly from flake graphite, overcoming the challenge of constructing CFs with desired structures and intact lattice integrity. The CFs constructed through this method exhibit high conductivity and high-performance electromagnetic interference shielding effectiveness.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Ruitao Jin, Filip Vukovic, Tiffany R. Walsh
Summary: This study investigates the key steps of graphene exfoliation and recombination in aqueous media through molecular simulations. The results show that peptide P1 can increase the energy barrier for graphene exfoliation, but also raise the barrier for sheet recombination, contributing to stable graphene dispersion in water.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Chemistry, Multidisciplinary
M. G. Sumdani, M. R. Islam, A. N. A. Yahaya, S. I. Safie
Summary: The study focuses on mechanical and chemical exfoliation methods, as well as the chemical functionalization of graphene, providing valuable insights into generating high-quality graphene more economically. This analysis aims to guide commercial bulk graphene synthesis with less defects by optimizing exfoliation approaches.
JOURNAL OF NANOPARTICLE RESEARCH
(2021)
Article
Electrochemistry
Thu Ha Thi Vu, Thao Thi Nguyen, Tien Hoang Nguyen, Minh Dang Nguyen, Quang Minh Nguyen
Summary: New catalysts with high electrochemical performance were successfully synthesized for application in Direct Alcohol Fuel Cells, showing significantly improved mass activities compared to graphene-support Pt electrocatalysts. The one-pot synthesis method resulted in simultaneous exfoliation, reduction and deposition of graphene, offering a promising alternative for catalyst synthesis.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Irina V. Antonova, Marina B. Shavelkina, Artem I. Ivanov, Nadezhda A. Nebogatikova, Regina A. Soots, Vladimir A. Volodin
Summary: This study obtained graphene flakes of different structures and resistances through the pyrolysis process of hydrocarbons in a plasma-chemical reactor. It was found that hydrogen is involved in graphene nucleation, while oxygen is absorbed from the air. The study also discovered that the growth parameters and synthesis conditions can control the defects and conductivity of graphene.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Won Taek Jung, Hyun-Seok Jang, Jun Woo Jeon, Byung Hoon Kim
Summary: An electronic textile-based NO2 gas sensor with fast response time and excellent sensing performance was fabricated by modifying the heat-treatment process, showing the highest response when treated at a heating rate of 1 degrees C/min. Morphology, structure, and chemical composition of the reduced GO were investigated to understand the enhanced sensing performance, revealing that oxygen functional groups play an important role.
Article
Nanoscience & Nanotechnology
Camila Mora, Antonio Buljan, Toribio Figueroa
Summary: The oxidation reaction of graphite with potassium permanganate in sulfuric acid was studied, and the reaction conditions and sample washing process were analyzed. It was found that longer reaction times, appropriate proportion of potassium permanganate, and room temperature conditions are beneficial for solubility and avoiding damage to the carbon structure. Water was identified as the medium for oxygen transfer during the washing process. Based on these findings, the graphite oxidation process was redefined.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shiqi Lin, Jie Tang, Kun Zhang, Youhu Chen, Runsheng Gao, Hang Yin, Lu-Chang Qin
Summary: The relationship between oxygen-containing functional groups in graphene and supercapacitor stability was investigated. Different oxygenic functional groups were introduced in reduced graphene oxide (rGO) by varying the reduction time. The study revealed that longer reduction time resulted in restoration of the sp(2) structure in the rGO sheet, increased crystallinity, and removal of oxygenic functional groups. The presence of oxygenic functional groups contributed to pseudocapacitance and larger specific capacitance, but also led to poorer rate performance and durability. By extending the reduction time, the oxygenic functional groups can be effectively removed and the stability of rGO can be improved.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Quentin Lenne, Alice Mattiuzzi, Ivan Jabin, Ludovic Troian-Gautier, Jonathan Hamon, Yann R. Leroux, Corinne Lagrost
Summary: A single material electrocatalyst with high activity and durability for both ORR and MOR is a conceptual challenge in designing versatile DMFCs. By using a supramolecular concept, surface-grafted molecular ligands can regulate the reactivity of Pt catalyst, leading to Pt CF3 ${{_{{\rm CF}{_{3}}}}}$ NPs/C with remarkable methanol tolerance, outstanding durability, and chemical stability. This research highlights a promising strategy for tuning interfacial properties, providing a potential solution for the design of DMFC cathodic and anodic compartments.
Article
Electrochemistry
Qingchun Wang, Zihao Wang, Xiaolong Liang, Shengli An, Changkun Cai, Yuanyuan Liu, Jinxiao Bao, Xiwen Song
Summary: The effects of CeO2-ZrO2 solid solution on the electrocatalytic activity, stability and anti-CO poisoning performance of methanol fuel cell anodes were investigated. Pt/CeO2-ZrO2/GO showed higher catalytic activity and stability against CO oxidation due to the addition of Zr4+ into the CeO2 lattice, which increased oxygen activity and storage capacity.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Seyedeh Fatemeh Aghaie Doost, Narges Ansari
Summary: Magnetic graphene nanocomposites have been synthesized using a simple electrochemical deposition method. The choice of cathode material had a significant impact on the morphological and magnetic properties of the nanocomposites, with nickel cathode synthesis resulting in higher crystallinity of cobalt nanoparticles and better exfoliation of graphene sheets.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Electrochemistry
Xiaoyun Xu, Xiaoyi Lv, Fei Tan, Yanping Li, Chao Geng, Bo Cui, Yishan Fang
Summary: An efficient electrochemical sensor based on FF/RGO composites was developed for simultaneous detection of heavy metal ions, showing superior stability and promising prospects in practical applications.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Piotr Kamedulski, Malgorzata Skorupska, Pawel Binkowski, Weronika Arendarska, Anna Ilnicka, Jerzy P. Lukaszewicz
Summary: The manuscript discusses the influence of external pressure on graphene exfoliation and 3D structuring, showing improved surface area and ORR activity. Results suggest that the outstanding ORR activity of 3D structured graphene materials is not solely due to catalytic centers, emphasizing the importance of structural factors.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Condensed Matter
Sung-Hwan Lim, Tae-Hwan Kim, Sung-Min Choi
PHYSICA B-CONDENSED MATTER
(2018)
Article
Chemistry, Multidisciplinary
Hyeri Kim, Jongsoon Kim, Hee-Sung Jeong, Hyungsub Kim, Hoyeon Lee, Jae-Min Ha, Sung-Min Choi, Tae-Ho Kim, Yoon-Chae Nah, Tae Joo Shin, Joona Bang, Sushil K. Satija, Jaseung Koo
CHEMICAL COMMUNICATIONS
(2018)
Editorial Material
Physics, Condensed Matter
Kwanwoo Shin, Jae-Ho Chung, Sung-Min Choi, Kookheon Char
PHYSICA B-CONDENSED MATTER
(2018)
Article
Chemistry, Physical
Priyanka Biswas, Debasis Sen, Jae-Min Ha, Sung-Min Choi
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2019)
Article
Chemistry, Multidisciplinary
Jae-Min Ha, Sung-Hwan Lim, Jahar Dey, Sang-Jo Lee, Min-Jae Lee, Shin-Hyun Kang, Kyeong Sik Jin, Sung-Min Choi
Article
Chemistry, Multidisciplinary
Sung-Hwan Lim, Min-Jae Lee, Shin-Hyun Kong, Jahar Dey, Aminah Umar, Sang-Jo Lee, Sung-Min Choi
ADVANCED MATERIALS INTERFACES
(2019)
Article
Nuclear Science & Technology
Dong Hoon Kam, Yong Hoon Jeong, Sung-Min Choi, Jong-Il Yun, Jong Hyuk Lee, Taeseung Lee, Min Suk Lee, Il-Kwon Jung, Jin-Wook Jang, Youngho Sihn, Tae-Hyeong Kim, Jun-Ki Lee, Shin-Hyun Kang, Sol-Chan Han, Jun-Yeop Lee, Young Taek Jee
NUCLEAR ENGINEERING AND DESIGN
(2020)
Article
Multidisciplinary Sciences
Mikhail V. Shuba, Dzmitry Yuko, Polina P. Kuzhir, Sergey A. Maksimenko, Vitaly K. Ksenevich, Sung-Hwan Lim, Tae-Hwan Kim, Sung-Min Choi
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Multidisciplinary
Jahar Dey, Sang-Jo Lee, Jiwhan Kim, Sung-Hwan Lim, Jae-Min Ha, Min-Jae Lee, Sung-Min Choi
Summary: This study introduces a method for forming nanoparticle supercrystals driven by covalent bonding interactions, which provide stronger structural stability compared to traditional intermolecular forces. The versatility and cost-effectiveness of the covalent bonding approach make it highly practical for various applications.
Article
Chemistry, Multidisciplinary
Aminah Umar, Jiwhan Kim, Sung-Min Choi
Summary: A facile method for synthesizing highly monodisperse single-crystalline gold nanoparticles (Au NPs) using universal seeds has been reported. The single crystallinity of particles is achieved by oxidative etching and controlled surface capping by silver atoms. The resulting Au NPs show uniform single crystallinity, high shape yield, and low size polydispersity, demonstrating the importance of seed uniformity in the synthesis process.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Nuclear Science & Technology
Dong Hoon Kam, Yong Hoon Jeong, Sung-Min Choi, Jong-Il Yun, Min Suk Lee
Summary: A silica gel-based system is proposed in this study, which demonstrates cost-effectiveness, stability, and easy maintenance, and can simultaneously achieve depressurization and CHF enhancement. Various parameters are considered to assess the steam removal efficiency of the system, showing great functionality, especially for small-sized reactors.
NUCLEAR ENGINEERING AND DESIGN
(2021)
Article
Nuclear Science & Technology
Dong Hoon Kam, Yong Hoon Jeong, Sung-Min Choi, Jong-Il Yun
Summary: The study evaluated the parametric effects on magnetic collection, including dimension, magnetic field strength, injected velocity, and particle concentration. It found that the capture efficiency is enhanced by increasing magnetic particle size and field strength, while hindered by non-magnetic coating thickness and fluid velocity. The magnetic withdrawal system can effectively capture particles under accidental environments and realize the filtering of magnetic impurities.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jiwhan Kim, Jahar Dey, Aminah Umar, Jae-Min Ha, Sang-Jo Lee, Jehan Kim, Sung-Min Choi
Summary: Highly stable three-dimensional nanoparticle supercrystals (NPSCs) were successfully fabricated using aldol reaction and slow solvent evaporation, which showed superior structural stability and thermal resistance compared to NPSCs stabilized by intermolecular forces.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Thiruparasakthi Balakrishnan, Sung-Min Choi
Summary: Researchers reported the fabrication of atomically thin gold nanosheets encapsulated within a silica layer, which exhibit excellent structural stability and catalytic activity.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Thiruparasakthi Balakrishnan, Min-Jae Lee, Jahar Dey, Sung-Min Choi
