Article
Chemistry, Multidisciplinary
Stewart F. Parker, Shrey Shah
Summary: In this study, the hydration changes of Nafion were characterized as a function of water content using a combination of inelastic neutron scattering (INS) and infrared spectroscopies, and compared to a series of trifluoromethanesulfonic acid hydrates with defined stoichiometry.
Article
Energy & Fuels
Osung Kwon, Kwangjin Oh, JaeHyoung Park, Sam Park, Tae Gwan Lee, Byungrak Son
Summary: This study investigated the proton conductivity enhancement mechanism of Nafion-silica sulfuric acid (SSA) composite membranes using atomic force microscopy. It was found that among different weight percentages of SSA, 1 wt% SSA exhibited the highest proton conductivity and thermal properties, attributed to the separation of the hydrophilic ionic channel network and hydrophobic backbone in the microstructural morphology.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Da Zhou, Aimin Ge, Toshiki Kogina, Ken-ichi Inoue, Yan-Xia Chen, Shen Ye
Summary: This study investigates the interfacial structures of a Nafion/graphene composite under different humid environments using SFG vibrational spectroscopy. The results show that the Nafion thin film forms a lamellar structure on the graphene surface, with a similar orientation to that of the free Nafion/air interface. The buried Nafion/graphene interface has distinct structural differences compared to hydrophilic substrate surfaces such as fused quartz and calcium fluoride, which significantly affect water adsorption behaviors at the interface.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Ryosuke Jinnouchi, Saori Minami, Ferenc Karsai, Carla Verdi, Georg Kresse
Summary: In this study, machine-learned interatomic potentials were used to accurately predict the structural and dynamical properties of dry and hydrated perfluorinated ionomers. Molecular dynamics simulations revealed the formation of hydrophilic and hydrophobic domains in this material, as well as the diffusion coefficients of protons and water molecules under various humidity conditions. Grotthuss chains consisting of two to three water molecules were found to significantly contribute to the high proton mobility under strongly humidified conditions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xuebin Ma, Xuncheng Yang, Mengqi Li, Jiwei Cui, Peiyu Zhang, Qun Yu, Jingcheng Hao
Summary: The elasticity of nanoparticles affects their cellular interactions, with stiff capsules showing higher cellular uptake compared to soft capsules, and influencing the uptake pathways.
Article
Chemistry, Physical
Hejin Huang, Zhen Cao, Karim R. Gadelrab, Jonathan P. Mailoa, Alfredo Alexander-Katz
Summary: Nafion, a commonly used material for PEFC, faces dehydration and dimensional instability issues in high-temperature, low-humidity environments. This paper proposes a potential solution by introducing nanoscale confinements to Nafion chains. It is found that dual chemistry confinement, consisting of both hydrophobic and hydrophilic confinements, can improve water absorption behavior and reduce dimensional instability of the Nafion membrane.
CHEMISTRY OF MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Taras Kavetskyy, Oleh Smutok, Olha Demkiv, Yuliia Kukhazh, Nataliya Stasyuk, Evhen Leonenko, Arnold Kiv, Yoshinori Kobayashi, Atsushi Kinomura, Ondrej Sausa, Mykhailo Gonchar, Evgeny Katz
Summary: The search for new nanoscale materials with predictable properties for the detection of toxic components in wastewater is a promising direction in biosensorics. This study showed that sulfur-modified TiO2 nanoparticles can significantly improve the operational parameters of laccase-based electrodes. The developed bioelectrodes, immobilizing the nanoparticles and enzyme on a carbon rod electrode, demonstrated high accuracy in phenol analysis in real wastewater samples.
BIOELECTROCHEMISTRY
(2022)
Article
Biochemical Research Methods
Seungho Lim, Woojun Kim, Sukyung Song, Man Kyu Shim, Hong Yeol Yoon, Byung-Soo Kim, Ick Chan Kwon, Kwangmeyung Kim
Summary: The development of BCN-AuNPs allows for enhanced cellular uptake of nanoparticles through bioorthogonal click chemistry on metabolically engineered stem cells.
BIOCONJUGATE CHEMISTRY
(2021)
Article
Chemistry, Physical
Amira S. Mohammed Ali, Moataz M. Soliman, Sherif H. Kandil, Shaker Ebrahim, Marwa Khalil
Summary: In this study, cellulose acetate (CA) silica-based nanocomposite membranes were fabricated using the dry-wet phase inversion procedure for water desalination. The effects of SNPs and MSNPs on the properties and performance of the CA membrane were investigated. The fabricated nanocomposite membranes exhibited hydrophilic surface properties and showed enhanced water flux by adding SNPs and MSNPs.
JOURNAL OF MATERIOMICS
(2022)
Article
Engineering, Chemical
Ming Wen, Min Chen, Kelin Chen, Pei-Long Li, Chao Lv, Xin Zhang, Yong Yao, Wan Yang, Guoqiang Huang, Guang-Kun Ren, Shun-Jie Deng, Yin-Ke Liu, Zhe Zheng, Ci-Gang Xu, De-Li Luo
Summary: By introducing layers of fluorinated silica nanoparticles on the surface of graphene oxide membrane, superhydrophobic modification was achieved, improving the hydrogen isotopic separating performance of the membrane and providing a potential method for isotope sieving.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Biomedical
Yulong Sun, Yanxin Han, Yannong Dou, Xinqi Gong, Haimang Wang, Xiaoyu Yu, Qiang Wang, Yixin Wang, Yue Dai, Fangfu Ye, Wei Jin, Hongyu Zhang
Summary: This study presents a lubricated nanocontainer for accurate drug delivery to the lesion while avoiding immune system recognition. Through in vitro and in vivo studies, this nanocontainer improves drug bioavailability and shows good biocompatibility.
BIOACTIVE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kai Tu, Junyan Wu, Weixia Zhu
Summary: In this study, macroporous pH-sensitive hydrogels with an enhanced hydrophobic property and a rich pore structure were prepared. The hydrogels showed high adsorption capacity for DOX and efficient release of anti-cancer drugs in the environment of cancer cells.
Article
Chemistry, Physical
Guoxiao Xu, Shiji Xue, Zenglv Wei, Jing Li, Konggang Qu, Ying Li, Weiwei Cai
Summary: The stable phosphotungstic acid/silica/Nafion (PWA/Si-N) composite membrane is fabricated with PWA as proton transfer agent and silica as water retainer, showing excellent stability and high temperature proton conductivity. The high temperature fuel cell performance of the composite membrane is significantly improved compared with the pristine Nafion membrane.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Polymer Science
Ruslan M. Mensharapov, Nataliya A. Ivanova, Dmitry D. Spasov, Sergey A. Grigoriev, Vladimir N. Fateev
Summary: This study investigated the structure of Nafion (R) membranes using small-angle X-ray scattering (SAXS). The effect of freeze/thaw cycles on the membrane nanostructure was considered for the first time. It was found that the average radius of water channels decreased during freeze/thaw cycles, but could be prevented by soaking the membrane in a water-methanol solution or modifying the membrane with silica.
Article
Chemistry, Physical
Mylene Robert, Assma El Kaddouri, Marie Crouillere, Jean-Christophe Perrin, Laetitia Dubau, Florence Dubelley, Kevin Mozet, Meriem Daoudi, Jerome Dillet, Jean-Yves Morel, Sebastien Leclerc, Olivier Lottin
Summary: This study investigates the impact of conjoint mechanical and chemical stresses on PFSA membranes. Accelerated aging tests showed significant morphological changes in the Nafion(TM) XL membrane, with the appearance of bubbles and delamination. Surprisingly, water sorption, self-diffusion properties, and cell performances of the aged membranes remained satisfactory.
JOURNAL OF POWER SOURCES
(2022)
Article
Polymer Science
Metin Karayilan, Tristan S. Kleine, Kyle J. Carothers, Jared J. Griebel, Kevin M. Frederick, Douglas A. Loy, Richard S. Glass, Michael E. Mackay, Kookheon Char, Jeffrey Pyun
JOURNAL OF POLYMER SCIENCE
(2020)
Article
Materials Science, Ceramics
P. R. Rao, K. Muralidharan, M. Momayez, Keith A. Runge, D. A. Loy
CERAMICS INTERNATIONAL
(2020)
Article
Optics
Zhihan Hong, Piaoran Ye, Douglas A. Loy, Rongguang Liang
Summary: A novel 3D printing process for glass micro-optics has been developed in this study, which can convert printed optical elements into transparent inorganic glass at low temperatures with specific performance indicators.
Article
Medicine, General & Internal
Connor Stahl, Kevin Frederick, Sachin Chaudhary, Christopher J. Morton, Douglas Loy, Krishna Muralidharan, Armin Sorooshian, Sairam Parthasarathy
Summary: The study compared the filtering efficiency of N95 and N99 masks with elastomeric linings for fine aerosols in laboratory simulations. The results showed that N99 masks with elastomeric linings had higher filtration efficiency, thereby potentially helping to contain the spread of SARS-CoV-2.
FRONTIERS IN MEDICINE
(2021)
Article
Chemistry, Applied
Derong Lin, Lijuan Xiao, Wen Qin, Douglas A. Loy, Zhijun Wu, Hong Chen, Qing Zhang
Summary: Chitosan/lignosulfonate composite micelles were successfully prepared and used to encapsulate curcumin. The encapsulation improved the stability, retention efficiency, and antioxidant activity of curcumin. These findings support the potential use of CS-LS as a delivery system for encapsulating hydrophobic biologically active substances.
CARBOHYDRATE POLYMERS
(2022)
Article
Agricultural Engineering
Derong Lin, Lijuan Xiao, Suqing Li, Wen Qin, Douglas A. Loy, Hong Chen, Qing Zhang
Summary: This study evaluated the effects of different proportions of fructooligosaccharide/soy isolate protein as wall materials on walnut oil microcapsules. Fructooligosaccharide was found to improve encapsulation efficiency and reduce water content and hygroscopicity of the microcapsules. Additionally, microencapsulation significantly improved the oxidation stability of walnut oil.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Acoustics
Zhijun Wu, Yang Li, Jing Tang, Derong Lin, Wen Qin, Douglas A. Loy, Qing Zhang, Hong Chen, Suqing Li
Summary: In this study, chitosan, nano-silicon aerogels, and tea polyphenols were used to form films through ultrasonication. The effects of ultrasonication parameters on the properties of the film were investigated. The results showed that ultrasonication improved the tensile strength, elongation at break, antioxidant, and antibacterial properties of the film.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zhihan Hong, Piaoran Ye, Douglas A. Loy, Rongguang Liang
Summary: This paper introduces a new liquid silica resin and a printing process for high-precision glass optics. The proposed method can print various optical surfaces with accurate shape and high quality, suitable for imaging applications. It also enables the printing of complex optical systems with multiple elements, enhancing system flexibility and functionality.
Review
Chemistry, Applied
Derong Lin, Yi Ma, Wen Qin, Douglas A. Loy, Hong Chen, Qing Zhang
Summary: This article reviews the formation, structure, and properties of starch-pectin blend, and explores its potential prebiotic properties. The interaction between starch and pectin is mainly through non-covalent interactions, leading to increased crystallinity and short-range ordered structures in starch, thereby increasing resistant starch and reducing digestibility. The resistance mechanism of the blend is similar to type 1 and type 5 resistant starch, and can potentially have synergistic probiotic effects.
FOOD HYDROCOLLOIDS
(2022)
Article
Chemistry, Applied
Derong Lin, Yang Li, Yichen Huang, Wen Qin, Douglas A. Loy, Hong Chen, Qing Zhang, Zhijun Wu
Summary: In this study, citric acid modified cellulose nanocrystals (MCNC) and silica aerogel (SA) were used as reinforcing agents and added to polyvinyl alcohol (PVA) to prepare composite films. The results showed that the modified reinforcing agents were uniformly dispersed in the PVA matrix and formed a compact structure, improving the thermal stability and barrier properties of the films.
CARBOHYDRATE POLYMERS
(2022)
Article
Materials Science, Multidisciplinary
Zhihan Hong, Yuanyuan Sun, Piaoran Ye, Douglas A. Loy, Rongguang Liang
Summary: A 3D printed glass lightguide array is developed to address the challenges of high spatial resolution in snapshot hyperspectral imaging. It samples the intermediate image in high spatial resolution and redistributes the pixels to achieve high spectral resolution. This technology simplifies the imaging system, reduces complexity and cost, and has demonstrated good performance with biological samples. It will catalyze the development of new hyperspectral imaging systems and enable new applications from UV to infrared.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kyung-Seok Kang, Anthony Phan, Chisom Olikagu, Taeheon Lee, Douglas A. Loy, Minho Kwon, Hyun-jong Paik, Seung Jae Hong, Joona Bang, Wallace O. Parker, Monia Sciarra, Alberto R. Angelis, Jeffrey Pyun
Summary: A method for producing high-performance sulfur-based plastics with improved thermomechanical properties, elasticity and flame retardancy has been developed, involving the synthesis of sulfur-based segmented multi-block polyurethanes and thermoplastic elastomers. These materials incorporate a significant amount of sulfur and exhibit controlled tensile strength, elasticity, and enhanced flame retardancy compared to traditional thermoplastic polyurethanes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Meeting Abstract
Chemistry, Multidisciplinary
Wenmo Sun, Robb Bagge, Ravindu Nanayakkara, Douglas Loy
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Douglas Loy, Kevin Frederick
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Douglas Loy, Wenmo Sun, Robb Bagge
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)