Article
Biochemical Research Methods
Sung Hee Ko, Pyeong Jun Park, Jongyoon Han
Summary: In this paper, a rigorous theoretical and experimental study on macromolecule sieving in a slanted nanofilter array was presented. The relationship between sieving conditions and efficiency as well as the hindrance effects on sieving were detailed. This study provides insights into designing a slanted nanofilter array for specific applications and understanding sieving principles in the nanofilter array.
Article
Physics, Multidisciplinary
Ahmer Mehmood, Babar Hussain Shah, Muhammad Usman, Iqrar Raza
Summary: Theoretical investigations of fundamental boundary-layer flows are always given prime importance. Flows due to moving continuous surfaces offer richer physics and more technological applications compared to flows over surfaces of finite length, and are more useful in delaying flow separation.
Article
Chemistry, Multidisciplinary
Ainur Sabirova, Camelia F. Florica, Florencio Pisig, Ahad Syed, Ulrich Buttner, Xiang Li, Suzana P. Nunes
Summary: In this study, a nanotechnology-based fabrication method was proposed to manufacture a stable and flexible nanoporous polymeric membrane with 300 nm pores using UV nanoimprint lithography. The membrane demonstrated high rejection rate and size-based sieving performance.
NANOSCALE ADVANCES
(2022)
Article
Engineering, Chemical
Wan-Chi Lee, Luc Bondaz, Shiqi Huang, Guangwei He, Mostapha Dakhchoune, Kumar Varoon Agrawal
Summary: Reinforced graphene membranes with a two-layer composite carbon film successfully prevent crack formation during gas separation, ensuring mechanical strength and avoiding cracks at centimeter scales. The hierarchical pore structure in the composite carbon film plays a crucial role in achieving gas-sieving graphene membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Dinara Konakbayeva, Solmaz Tabtabaei
Summary: By combining sieving and triboelectrostatic separation methods, different protein content oat groat particles can be effectively fractionated, with a linear relationship found between protein content and particle diameter. Bran-rich fractions exhibit higher charge-to-mass ratios, while starch-rich fractions show higher charge density under certain conditions in terms of tribo-charging behavior.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Xiaomei Liu, Dingyong He
Summary: A high-performance hydrogen separation membrane was developed using atomic layer deposition method to deposit ultra-thin Al2O3 layer on a porous anodic aluminum oxide support. The membrane exhibited high hydrogen permeance and selectivity, making it suitable for industrial hydrogen purification and recovery.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Shizhuo Zhang, Jun Yuan, Shuai Wang, Yunfan Li, Yuhang Xu, Dingyue Sun, Feng Liu, Gary J. Cheng
Summary: Researchers have developed a multistage micron/nanocomposite pore membrane using femtosecond laser induction, which significantly expands the range of filterable contaminants and enhances stability. This membrane demonstrates high efficiency in multiphase water filtration and liquid pressure-driven filtration, offering promising advancements in water purification technologies.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tun Cao, Zhongming Wang, Libang Mao
Summary: This study presents an optical sorting method for polystyrene particles using optofluidic nanophotonic paired waveguide (ONPW) composed of chalcogenide semiconductor Sb2Se3. The coupling length between hot spots in the ONPW can be modulated by changing the state of Sb2Se3, allowing for the trapping and sorting of particles with different shapes. This scheme may provide a new approach for shape-selective sieving of biomolecules and meet the requirements of new-generation lab-on-chip techniques.
Article
Engineering, Chemical
Shiqi Huang, Shaoxian Li, Kuang-Jung Hsu, Luis Francisco Villalobos, Kumar Varoon Agrawal
Summary: Etching an ensemble of nanopores in single-layer graphene using a millisecond gasification reactor (MGR) allows for high-performance gas sieving; Analysis of etching conditions on nanopore formation using Raman spectroscopy and scanning tunneling microscope reveals the relationship between etching temperature and pore density; Optimized nanoporous single-layer graphene membranes show extremely attractive CO2 sieving performances with high CO2 permeance and selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Yuqian Du, Yue Liu, Fusheng Pan, Shuwei Liang, Meidi Wang, Zhiming Zhang, Chenliang Cao, Hongjian Wang, Yuhan Wang, Zhongyi Jiang
Summary: This study successfully constructed hybrid membranes with 2D vertical continuous channels using layered double hydroxide array, achieving optimal water permeability and selectivity by manipulating the reaction time and Co2+/Al3+ ratio for the vertically aligned LDH array within the membranes. The vertically aligned LDH array exhibited superior performance compared to randomly oriented LDH in terms of water permeability and selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Analytical
Valentina Biagioni, Alpha L. Sow, Alessandra Adrover, Stefano Cerbelli
Summary: Microcapillary hydrodynamic chromatography is a technique for size-based separation, utilizing hindrance effects and improved device design for performance enhancement, with potential for extension to multistage structures.
ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Chemical
Jian Li, Lei Li, Xin Li, Liangliang Dong, Zhenyu Wang, Jiangnan Shen, Bart Van der Bruggen
Summary: A novel nanofiltration selective layer with in-situ formed ZIF-8 was successfully fabricated using an integrated vacuum filtration and interfacial polymerization method. The selective layer exhibited excellent molecular sieving ability and pure water permeability.
Article
Nanoscience & Nanotechnology
Timothy H. Cheung, Chang Xue, Daniel A. Kurtz, Molly S. Shoichet
Summary: Traditionally, therapeutic release from hydrogels is controlled by encapsulation within nanoparticles, but this approach is limited for the release of proteins. To address this issue, a new encapsulation-free release platform was designed where negatively charged proteins are adsorbed to the exterior of transiently cationic nanoparticles. This strategy offers a promising new method for controlled release of anionic protein therapeutics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Mechanics
D. Exposito, S. L. Gai, A. J. Neely
Summary: This study attempts to solve steady-state triple-deck equations for supersonic flow past a compression corner, and compares the results with previous methods. The study reveals the presence of spurious wave-packets, which may be caused by the numerical method employed.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Saurabh S. Sawant, V Theofilis, D. A. Levin
Summary: This study investigates linear three-dimensional instability in shock layers and laminar separation bubbles induced by shock-wave/boundary-layer interactions in Mach 7 nitrogen flow over a double wedge. High-fidelity simulations using the direct simulation Monte Carlo method capture the evolution of flow features from the beginning of three-dimensionality to the early stages of nonlinear saturation.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Biochemistry & Molecular Biology
Rebecca C. Feiner, Julian Teschner, Kathrin E. Teschner, Marco T. Radukic, Tobias Baumann, Sven Hagen, Yvonne Hannappel, Niklas Biere, Dario Anselmetti, Katja M. Arndt, Kristian M. Mueller
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2019)
Article
Biochemical Research Methods
Miriam S. Epping, Severin Wedde, Armin Grundmann, Marco Radukic, Harald Groeger, Anke Hummel, Martina Viefhues
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2020)
Article
Nanoscience & Nanotechnology
Yubo Qi, Michael Westphal, Neita Khayya, Inga Ennen, Tobias Peters, Julian Cremer, Dario Anselmetti, Guenter Reiss, Andreas Huetten, Armin Goelzhaeuser, Petr Dementyev
Summary: Despite the challenges of synthesizing large-scale intrinsically porous planar nanomaterials, this study presents a facile method for fabricating continuous water-selective carbon nanomembranes of variable thickness from polycyclic aromatic hydrocarbons. The membranes exhibit high porosity and their performance is strongly influenced by thickness, as evidenced by permeation measurements and modeling.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Maxim Dirksen, Pascal Fandrich, Lukas Goett-Zink, Julian Cremer, Dario Anselmetti, Thomas Hellweg
Summary: This study explores the production of thermoresponsive, free-standing microgel membranes using N-isopropylacrylamide (NIPAM) and the UV-sensitive comonomer 2-hydroxy-4-(methacryloyloxy)benzophenone (HMABP). The use of different cross-linkers in microgel syntheses allows for variations in the network structure and swelling behavior. The incorporation of the comonomer is influenced by the choice of cross-linker, which is crucial for the subsequent photochemical membrane formation.
Article
Nanoscience & Nanotechnology
Patrick Stohmann, Sascha Koch, Yang Yang, Christopher David Kaiser, Julian Ehrens, Juergen Schnack, Niklas Biere, Dario Anselmetti, Armin Goelzhaeuser, Xianghui Zhang
Summary: Ultrathin membranes with subnanometer pores for molecular size-selective separation were created through electron-induced cross-linking of self-assembled monolayers (SAMs) on surfaces.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Viktor Sabadasch, Maxim Dirksen, Pascal Fandrich, Julian Cremer, Niklas Biere, Dario Anselmetti, Thomas Hellweg
Summary: In this study, palladium-loaded smart membranes made by UV cross-linking of thermoresponsive microgels were prepared as reusable, catalytically active materials. The membranes were examined for their coverage of a supporting mesh and their Young modulus. The catalytic activity of the membrane was compared with suspended colloidal nanoparticle microgel hybrids, and the membrane showed lower catalytic activity but allowed for easy separation and recycling of the catalyst. The results demonstrate the feasibility and durability of depositing catalytically active inter-cross-linked microgel particles on commercial nylon meshes for scaling up continuous industrial processes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Jenny Fjodorova, Robin Held, Gerd Hublik, Jorge M. Esteban Vazquez, Volker Walhorn, Thomas Hellweg, Dario Anselmetti
Summary: Xanthan gum''s thickening properties are correlated with the formation of secondary structures and the coordination of ions on the polymer side chain. Modifying the secondary structures can alter its thickening properties.
Article
Biochemical Research Methods
Jakob Derksen, Martina Viefhues
Summary: This work presents a microfluidic device with parallelized dielectrophoretic separations of small biological samples. The device utilizes insulator-based DEP for selective separation and achieves high separation purity and fast purification.
Article
Multidisciplinary Sciences
Zhiwei Jiang, Ruijiao Dong, Austin M. Evans, Niklas Biere, Mahmood A. Ebrahim, Siyao Li, Dario Anselmetti, William R. Dichtel, Andrew G. Livingston
Summary: In this study, we successfully created ordered pores in an ultra-thin nanofilm by synthesizing selectively functionalized macrocycles with differentiated reactivities. The size of the subnanometre macrocycle pores in the nanofilm surfaces could be precisely tailored by varying the macrocycle identity. Compared to disordered membranes, aligned macrocycle membranes exhibited higher permeance and selectivity. In high-value separations, such as enriching cannabidiol oil, the aligned macrocycle membranes achieved significantly faster ethanol transport and higher enrichment.
Article
Chemistry, Physical
Lukas Eickhoff, Mira Kessler, Christopher Stubbs, Jakob Derksen, Martina Viefhues, Dario Anselmetti, Matthew I. I. Gibson, Berthold Hoge, Thomas Koop
Summary: This study explores the relationship between the molecular size of poly(vinyl alcohol) (PVA) and its ice nucleation activity. The experiments show that the ice nucleation activity of shorter PVA chains significantly decreases with a decrease in molar mass. The results support the view that PVA polymers and oligomers act as heterogeneous ice nucleators.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Polymer Science
Julian Cremer, Bernhard P. Kaltschmidt, Annika Kiel, Jens Eberhard, Stephan Schmidt, Christian Kaltschmidt, Barbara Kaltschmidt, Andreas Huetten, Dario Anselmetti
Summary: The aging-induced surface-covering EBS layers changed the surface morphology, promoting bacterial adhesion and biofilm formation of Pseudomonas aeruginosa. This study provides insight into the time-dependent, polymer-liquid interface aging process of industrial performance polypropylene samples and highlights the detrimental effects of EBS on surface transformation and degradation.
Article
Nanoscience & Nanotechnology
Zhen Yao, Nikolaus Meyerbroeker, Yubo Qi, Julian Cremer, Michael Westphal, Dario Anselmetti, Yang Yang, Armin Goelzhaeuser
Summary: A scalable synthesis method for carbon nanomembranes (CNMs) has been developed using self-assembled monolayers and electron irradiation. The CNMs, created from poly(4-vinylbiphenyl) (PVBP) spin-coated on SiO(2)/Si wafers, exhibit a high water flux, precise ion selectivity, and high porosity. The method provides a feasible route for large-scale fabrication of CNMs for various applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Maxim Dirksen, Timo Braendel, Soren Grosskopf, Sebastian Knust, Johannes Bookhold, Dario Anselmetti, Thomas Hellweg
Summary: Poly(N-isopropylacrylamide) based copolymer microgels were used to create thermoresponsive membranes for investigating ion transport. Additionally, these microgels can be decorated with silver nanoparticles and cross-linked for catalytic reduction applications.
Review
Biotechnology & Applied Microbiology
Vera Ortseifen, Martina Viefhues, Lutz Wobbe, Alexander Gruenberger
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2020)