Article
Environmental Sciences
Enguang Nie, Yandao Chen, Yuhui Lu, Lei Xu, Sufen Zhang, Zhiyang Yu, Qingfu Ye, Haiyan Wang
Summary: This study investigates the effects of reduced graphene oxide (RGO) on the fate of triclosan in paddy soil. The results show that RGO significantly inhibits the mineralization of triclosan and reduces its extractability. RGO also accelerates the dissipation of triclosan and has little effect on triclosan-degrading bacteria. These findings provide important insights into the environmental risk of triclosan in RGO-contaminated soil.
Article
Nanoscience & Nanotechnology
Dang Du Nguyen, Yonas Tsegaye Megra, TaeGyeong Lim, Ji Won Suk
Summary: Free-standing graphene-based paper-like materials are of interest due to their tunable properties and unique structures. Understanding the interactions between graphene sheets is crucial for their applications. In this study, we characterize the interlayer cohesion energies in graphene papers through mechanical separation and chemical reduction. The interlayer cohesion energy is correlated with the oxygen content, interlayer spacing, and electrical conductivity of the graphene papers, providing insight into the potential tunability of interlayer interactions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Can Cao, Zongkai Lin, Xiaochen Liu, Yanyan Jia, Eduardo Saiz, Stephan E. Wolf, Hanoch Daniel Wagner, Lei Jiang, Qunfeng Cheng
Summary: Coating Bombyx mori silks with a thin layer of reduced graphene oxide (rGO) has been shown to significantly increase their tensile strength and toughness. This bioinspired approach provides a universal and facile strategy for functionalizing natural fibers.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Polymer Science
Santiago Maldonado-Magnere, Mehrdad Yazdani-Pedram, Hector Aguilar-Bolados, Raul Quijada
Summary: This study investigates the influence of two thermally reduced graphene oxides with different oxygen levels on the barrier properties of TPU nanocomposites. The addition of TRGO increased the Young modulus of the composites and enhanced their barrier properties, leading to a significant decrease in oxygen permeability.
Article
Chemistry, Physical
Xianjue Chen, Wugang Fan, Xinchen Dai, Jae Sung Yun, Yuan Huang, Xiao Wang, Zhaoquan Zhang, Dong Jun Kim
Summary: The effect of spatial confinement on suppressing migration and coalescence of metal atoms/clusters in solid films made of graphene oxide can increase the stability of dispersed metal atoms and nanoclusters at high temperatures. Pressing has a significant impact on the reduction of graphene oxide and the morphology and distribution of metals in the films, demonstrating the efficacy of externally applied pressure in controlling metal reactivity and mobility in bulk solids.
Article
Chemistry, Analytical
Huiting Wang, Li Dong, Ling Zhang, Xiangxiang Chen, Qian Zhang, Lixin Xia
Summary: A thermally responsive hybrid poly(NIPAm-b-BVIm[FcCOO])-rGO composed of block co-polymer poly(NIPAm-b-BVImBr), reduced graphene oxide (rGO) and electroactive anions was designed and synthesized to achieve electroactive functionality. The control over the polymeric ionic liquids (PILs) segment allowed for excellent thermally responsive electrocatalysis with reversible 'ON-OFF' effect, showcasing the potential for broad application in the field of intelligent electrochemical sensors and devices.
Article
Acoustics
Ales Ruciga, Justin G. Connell, Matevz Dular, Bostjan Genorio
Summary: In this study, functionalization of reduced graphene oxide (rGO) was achieved through sonication and polyvinyl alcohol (PVA). The influence of sonication energy on functionalization efficacy was investigated, and it was found that the optimum functionalization was achieved at a 50% horn amplitude.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Vusani M. Maphiri, Gift Rutavi, Ndeye F. Sylla, Saheed A. Adewinbi, Oladepo Fasakin, Ncholu Manyala
Summary: This study presents a simple method for fabricating high-capacity thermally reduced graphene oxide microsupercapacitors using atmospheric pressure chemical vapor deposition and mask-free sketching apparatus. Experimental results demonstrate that the electrochemical performance can be effectively tuned by adjusting the reduction temperature and number of digits.
Article
Engineering, Chemical
Michal Kukielski, Artur Kasprzak, Radoslaw Zurowski, Joanna Tanska, Paulina Wiecinska, Anna Wieclaw-Midor, Justyna Zygmuntowicz, Mihai Alexandru Grigoroscuta, Piotr Wiecinski
Summary: This paper describes the chemical modification of graphene oxide (GO) surface with glucosamine, and the efficiency of the reaction was confirmed. The functionalization of GO significantly reduces the agglomeration of graphene oxide platelets. The interactions between GO and two types of ceramic nanoparticles were also investigated, and the addition of GO and f-GO increased the viscosity of the ceramic suspensions.
Article
Chemistry, Physical
Meryem Samanci, Ayse Bayrakceken Yurtcan
Summary: Reduced graphene oxide (RGO) has been synthesized as carbon sourced catalyst support materials for Polymer Electrolyte Membrane (PEM) fuel cells. Pt catalysts were synthesized using supercritical carbon dioxide deposition technique over the synthesized support materials. The structures of thermally and chemically reduced graphene oxide supports and their Pt catalysts were investigated.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Tilek Kuanyshbekov, Nazim Guseinov, Zhandos Tolepov, Bayan Kurbanova, Malika Tulegenova, Kydyrmolla Akatan, Nurgamit Kantay, Elzhas Zhasasynov
Summary: This study demonstrates a new and efficient strategy for manufacturing high performance reduced graphene oxide (RGO) membranes from local raw materials. The thermal recovery of graphene oxide (GO) membranes resulted in changes in their physical and chemical properties, making them potential materials for sensitive elements such as gas and humidity sensors.
Article
Materials Science, Multidisciplinary
Danilo Argentoni Nagaoka, Daniel Grasseschi, Sergio Humberto Domingues
Summary: The study improved the synthesis of graphene derivatives, obtaining a high structural quality rGO HQ material by controlling the oxidation process and reduction method, which exhibits high conductivity and transparency, and can be applied in large-scale production efficiently.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Engineering, Biomedical
Manuel Quinones-Perez, Ruben J. Cieza, Bryan Khai D. Ngo, Melissa A. Grunlan, Maribella Domenech
Summary: Silicones, such as PDMS, are commonly used in microfluidic device fabrication, but the uncontrollable absorption of small hydrophobic molecules limits their applicability in cell-based drug assays and sensing applications. This study demonstrates that incorporating PEO-SA into silicone substrates can reduce small hydrophobic molecule sequestration and improve cell compatibility in assays.
ACTA BIOMATERIALIA
(2021)
Article
Mechanics
Maysam Rezaee, Li-Chih Tsai, Azam Elyasigorji, Muhammad Istiaque Haider, Armin Yazdi, Nathan P. Salowitz
Summary: This study introduced a method using controlled peel test to characterize the failure modes of rGO(1)-based devices. Analysis of detached rGO particles from the substrate during testing was performed using image processing technique and results were used to create a mathematical model quantifying the cohesion and adhesion failure energies. Partial failure energies were calculated based on the percentage of rGO particles detached from the substrate, showing that higher detachment percentage led to lower failure energies.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Sabrin Al-Fogra, Bowen Yang, Lisa Jurkiewicz, Frank Hauke, Andreas Hirsch, Tao Wei
Summary: This study presents a facile and universal laser writing approach for covalent patterning of graphene, leading to the formation of graphene architectures consisting of antaratopically functionalized superlattices, which were previously elusive.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Xin Fan, Xizheng Wu, Fan Yang, Lei Wang, Kai Ludwig, Lang Ma, Andrej Trampuz, Chong Cheng, Rainer Haag
Summary: Novel bionanocatalysts with bacterial binding ability and high ROS-generating capacity have been developed. They can selectively kill multidrug-resistant bacteria while leaving healthy tissue unaffected. Additionally, they can enhance their catalytic performance through heat and NIR laser irradiation, achieving effective ablation against bacteria. The treated bacterial populations show a significant reduction, and mature biofilms do not recur.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biochemistry & Molecular Biology
Xu Zhang, Tim Abel, Shuo Su, Andreas Herrmann, Kai Ludwig, Michael Veit
Summary: The assembly and budding of influenza C virus is mediated by three membrane proteins. The hexagonal arrangement of the HEF protein is crucial for virus budding, and its interaction with CM1 stabilizes the clusters. CM2 and CM1 also play important roles in this process.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2022)
Article
Biochemical Research Methods
Lutz Adam, Eva Muller, Kai Ludwig, Simon Klenk, Daniel Lauster, Susanne Liese, Andreas Herrmann, Christian P. R. Hackenberger
Summary: The conjugation of virus-binding ligands to multivalent carriers is an effective strategy to inhibit viral entry into host cells. Even partially sialylated ligands can retain their inhibitory effect, and carriers carrying two different ligand-linker structures showed higher viral inhibition.
BIOCONJUGATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yuting Deng, Yang Gao, Tiantian Li, Sutong Xiao, Mohsen Adeli, Raul D. Rodriguez, Wei Geng, Qiu Chen, Chong Cheng, Changsheng Zhao
Summary: This study develops a cobalt selenide-based biocatalyst with an amorphous Ru@CoSe nanolayer for ultrafast and broadspectrum catalytic ROS-elimination. The biocatalyst shows excellent catalase-like kinetics and can efficiently rescue the proliferation of mesenchymal stem cells in an oxidative stress environment. The study offers an effective nanomedicine for catalytic ROS-scavenging and ultrafast healing of inflammatory wounds, and provides a strategy to design biocatalytic metal compounds.
Article
Chemistry, Multidisciplinary
Taylor M. Page, Chuanxiong Nie, Lenard Neander, Tatyana L. Povolotsky, Anil Kumar Sahoo, Philip Nickl, Julia M. Adler, Obida Bawadkji, Jorg Radnik, Katharina Achazi, Kai Ludwig, Daniel Lauster, Roland R. Netz, Jakob Trimpert, Benedikt Kaufer, Rainer Haag, Ievgen S. Donskyi
Summary: A combination of polyglycerol sulfates and hydrophobic C-60 fullerene can effectively inhibit the infection of SARS-CoV-2 variants in vitro. This research provides significant insights into antiviral strategies and holds promise for the development of effective treatments against viral outbreaks.
Article
Chemistry, Multidisciplinary
Philip Nickl, Tarek Hilal, Daniel Olal, Ievgen Sergeevitch Donskyi, Jorg Radnik, Kai Ludwig, Rainer Haag
Summary: This study presents a method for preparing a graphene-based modified support film to address the problem of protein adsorption at the air-water interface in cryoEM. The chemical modification of graphene sheets allows for the covalent anchoring of unmodified proteins, which improves particle orientations and prevents protein denaturation. The application of the modified support film in single particle analysis demonstrates its potential for high resolution structure determination.
Article
Chemistry, Multidisciplinary
Raju Bej, Chuanxiong Nie, Kai Ludwig, Vahid Ahmadi, Jakob Trimpert, Julia M. Adler, Tatyana L. Povolotsky, Katharina Achazi, Marten Kagelmacher, Ricardo Martin Vidal, Jens Dernedde, Benedikt B. Kaufer, Rainer Haag
Summary: Researchers have developed a synthetic nanostructure that mimics the properties of mucins, the key component of protective mucus barrier. This mucin-inspired fiber showed strong activity against SARS-CoV-2 and its mutant strain, with a low inhibitory concentration. The study also investigated the impact of fiber length on the inhibition of SARS-CoV-2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Badri Parshad, Marlena N. Schlecht, Morris Baumgardt, Kai Ludwig, Chuanxiong Nie, Agustina Rimondi, Katja Honzke, Stefano Angioletti-Uberti, Vinod Khatri, Paul Schneider, Andreas Herrmann, Rainer Haag, Andreas C. Hocke, Thorsten Wolff, Sumati Bhatia
Summary: In this study, a low-molecular-weight dual-action linear polymer is used to successfully inhibit different strains of influenza A virus. The optimized polymer targets both hemagglutinin and neuraminidase on the virus surface, leading to effective inhibition of virus propagation. The polymer is significantly more effective than the commercial drug zanamivir, demonstrating its translational potential for broad and high antiviral efficacy.
Article
Chemistry, Multidisciplinary
Nives Hribernik, Denisa Vargova, Marlene C. S. Dal Colle, Jia Hui Lim, Giulio Fittolani, Yang Yu, Junki Fujihara, Kai Ludwig, Peter H. Seeberger, Yu Ogawa, Martina Delbianco
Summary: This study demonstrates the designability of oligosaccharides in accessing materials with tunable shapes and properties. Synthetic cellulose-based oligomers were assembled into 2D or 3D rod-like crystallites or elongated aggregates with tunable surfaces, resulting in self-healing supramolecular hydrogels. These synthetic carbohydrate-based materials provide new tools for material scientists and supramolecular chemists.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Markus Fischer, Meike Luck, Max Werle, Alexander Vogel, Mohammad Bashawat, Kai Ludwig, Holger A. Scheidt, Peter Mueller
Summary: This study investigates the interaction of ceritinib and imatinib with lipid membranes and finds that ceritinib has a stronger impact on membranes, affecting membrane order and transmembrane permeability. The interaction between ceritinib and membranes can be explained by its competition with cholesterol and attenuation of its ordering effect.
CHEMISTRY AND PHYSICS OF LIPIDS
(2023)
Article
Materials Science, Biomaterials
Daniel Braatz, Justus H. H. Peter, Mathias Dimde, Elisa Quaas, Kai Ludwig, Katharina Achazi, Michael Schirner, Matthias Ballauff, Rainer Haag
Summary: This study presents novel pi-electron stabilized polyelectrolyte block copolymer micelles based on dendritic polyglycerolsulfate-cystamine-block-poly(4-benzoyl-1,4-oxazepan-7-one)-pyrene (dPGS-SS-POxPPh-Py), which exhibit a low critical micelle concentration (CMC) and high drug loading capacities. The micelles demonstrate spherical morphology and show stable noncovalent interactions between the core-forming block segment and the chemotherapeutic Docetaxel (DTX). They also exhibit successful cellular uptake and controlled drug release in cancerous cells. Furthermore, the micelles effectively inhibit cancer cell growth, showing significant potential for targeted drug delivery in clinical cancer treatment.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Fatemeh Zabihi, Zhaoxu Tu, Sabine Kaessmeyer, Fabian Schumacher, Fiorenza Rancan, Burkhard Kleuser, Christoph Boettcher, Kai Ludwig, Johanna Plendl, Sarah Hedtrich, Annika Vogt, Rainer Haag
Summary: The interaction between graphene and human skin is relevant in toxicology and dermal delivery. Polyglycerol-functionalized graphene sheets with positive and negative surface charges interacted with the skin and remained in the stratum corneum, suggesting their potential as topical delivery systems.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Fatemeh Zabihi, Zhaoxu Tu, Sabine Kaessmeyer, Fabian Schumacher, Fiorenza Rancan, Burkhard Kleuser, Christoph Boettcher, Kai Ludwig, Johanna Plendl, Sarah Hedtrich, Annika Vogt, Rainer Haag
Summary: This research investigated the interaction between graphene sheets with different surface charges and human skin, and explored their potential as topical delivery systems. The positively and negatively charged graphene sheets were found to interact with the skin and enhance drug penetration. Laser irradiation was also shown to accelerate drug release. This study suggests a new strategy for topical drug delivery using graphene sheets.
NANOSCALE ADVANCES
(2023)
Article
Construction & Building Technology
Ahmad Soleimani, Mohsen Mahdavi Adeli, Farshad Zamani, Hamid Haghshenas Gorgani
Summary: This research investigates a rotary disk with variable cross-section and incompressible hyperelastic material with functionally graded properties in large hyperelastic deformations. The changes in cross-section and material properties are expressed using a power relation, with (m) representing the changes in cross-section and (n) representing the manner of changes in material properties. The constants used for hyperelastic material have been obtained from experimental data. The obtained equations have been solved for different m, n, and angular velocity values, and the values of radial stresses, tangential stresses, and elongation have been compared. The results show that m and n have a significant impact on disk behavior, and the expected behavior of the disk can be obtained by an optimal selection of these two parameters.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Nasim Khosravani, Vahid Ahmadi, Ali Kakanejadifard, Mohsen Adeli
Summary: This study synthesized a thermosensitive two-dimensional polymeric network that can efficiently load antibiotics and has good antibacterial activity and drug delivery performance.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2022)
