Article
Multidisciplinary Sciences
Kohei Suzuki, Yoshiomi Hiroi, Natsuki Abe-Fukasawa, Taito Nishino, Takeaki Shouji, Junko Katayama, Tatsuto Kageyama, Junji Fukuda
Summary: In this study, a material called prevelex was developed for coating microdevices in order to prevent nonspecific protein and cell adhesion. The prevelex coating proved to be effective in creating non-fouling surfaces, facilitating the culture of cells and the formation of uniform spheroids.
SCIENTIFIC REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Anna Schulte, Andres de los Santos Pereira, Robert Pola, Ognen Pop-Georgievski, Siyu Jiang, Iryna Romanenko, Manisha Singh, Zdenka Sedlakova, Holger Schoenherr, Rafal Poreba
Summary: Cell sheet harvesting and rapid release can be achieved without the use of thermoresponsive materials by functionalizing non-thermoresponsive poly(2-hydroxyethyl methacrylate) (p(HEMA)) with cell-adhesive peptide motifs. This approach allows for extensive attachment and proliferation of cells, and the formed cell sheets can be released easily by rinsing with cell-culture medium.
MACROMOLECULAR BIOSCIENCE
(2023)
Article
Engineering, Mechanical
Mayu Miyazaki, Ken Nakano, Chiharu Tadokoro, Sorin-Cristian Vladescu, Thomas Reddyhoff, Shinya Sasaki, Yoshinobu Tsujii
Summary: The study found that parallel grooves with adequate dimensions significantly improve the durability of CPBs in lubricated sliding, and CPBs on a flat substrate exhibit a layered structure, with an additional reinforced tough layer provided by the parallel grooves.
Article
Materials Science, Multidisciplinary
Tugce Nihal Gevrek, Aysun Degirmenci, Rana Sanyal, Harm-Anton Klok, Amitav Sanyal
Summary: Polymeric coatings with amine-reactive brushes synthesized from a succinimidyl group-activated carbonate monomer allow for effective functionalization and protein immobilization. The use of bioactive ligands such as biotin on these brushes enables detection of target proteins and potential conjugation with quantum dots. Comparison with traditional active ester-based brushes shows higher conjugation efficiency with the carbonate-based brushes, and orthogonal functionalization of the brushes with different molecules via microcontact printing demonstrates spatial control for potential diagnostic applications.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Guifeng Liu, Xudong Sun, Xiaodong Li, Zhenxin Wang
Summary: This review summarizes the recent advances in the bioanalytical and biomedical applications of polymer modified substrates, focusing on the various functions of polymers and their applications in biosensors and antibacterial surfaces. The review also discusses the prospects and future directions of polymer modified substrates in the development of biodevices for the diagnosis, treatment, and prevention of diseases.
Article
Polymer Science
Sean T. McDermott, Shawn P. Ward, Ngoc Chau H Vy, Zilu Wang, Mayra Daniela Morales-Acosta, Andrey Dobrynin, Douglas H. Adamson
Summary: Passing-through polymerization is a method for synthesizing thicker and more densely packed polymer brushes by diffusing monomers through a functionalized surface. The study used computer simulations and experiments to demonstrate the implementation of this method and observed some unique phenomena.
Article
Engineering, Biomedical
Lluis Oliver-Cervello, Helena Martin-Gomez, Nandin Mandakhbayar, Young-Woo Jo, Elisabetta Ada Cavalcanti-Adam, Hae-Won Kim, Maria-Pau Ginebra, Jung-Hwan Lee, Carlos Mas-Moruno
Summary: Cell-material interactions can be regulated by mimicking bone extracellular matrix on the surface of biomaterials. Synthetic osteogenic domains derived from BMP-2 are gaining attention as a strategy for bone regeneration without clinical risks associated with the molecule. Screening of the BMP-2 epitopes identified peptides that enhance cell adhesion and osteogenic differentiation. The peptides were used to functionalize titanium surfaces, showing improved bone formation and reduced fibrous tissue thickness.
ADVANCED HEALTHCARE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jie Liu, Yuling Sun, Xiaoteng Zhou, Xiaomei Li, Michael Kappl, Werner Steffen, Hans-Juergen Butt
Summary: This research introduces a one-step grafting method for poly(dimethylsiloxane) (PDMS) brushes on surfaces, meeting the requirements of fast, easy, universal, stable, robust, and environmentally friendly coatings. The coatings exhibit excellent sliding properties and high temperature resistance, making them an ideal solution for long-term degradation issues of coatings for heat-transfer surfaces.
ADVANCED MATERIALS
(2021)
Article
Engineering, Environmental
Kai Li, Jun Chen, Yang Xue, Tiexin Ding, Shengbo Zhu, Mengting Mao, Lan Zhang, Yong Han
Summary: The study found that grafting polymer brushes and HHC-36 did not substantially change the microstructure of the nanorods, but the brushes efficiently increased the load and stability of the HHC-36. HA nanorods themselves cannot kill bacteria, but with the assistance of HHC-36, physical puncturing by nanorods works efficiently in killing Staphylococcus aureus.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Multidisciplinary Sciences
Justas Svirelis, Zeynep Adali, Gustav Emilsson, Jesper Medin, John Andersson, Radhika Vattikunta, Mats Hulander, Julia Jarlebark, Krzysztof Kolman, Oliver Olsson, Yusuke Sakiyama, Roderick Y. H. Lim, Andreas Dahlin
Summary: The article introduces a platform for long-term tether-free trapping of proteins in solution, utilizing a responsive polymer brush to switch solid state nanopores between fully open and closed states with respect to proteins, enabling high concentration and high number trapping of proteins in nanoscale chambers.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Randall T. Snipes, Mauricio Melara, Andrii Tiiara, Jeffery Owens, Igor Luzinov
Summary: By modified glass bubbles with hydrophilic polymer grafted layers, a fluorine-free aqueous suspension is developed to efficiently extinguish liquid hydrocarbon pool fires, demonstrating superior spreading and sealing ability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Mona Es-Souni, Martha Es-Souni, Hamzah Bakhti, Aydin Guelses, Helge Fischer-Brandies, Yahya Acil, Joerg Wiltfang, Christian Floerke
Summary: The study demonstrates that poly(sulfobetaine methacrylate) coating prepared by photopolymerization on oxygen plasma-activated silanized titanium substrates shows anti-biofouling properties. The coatings exhibit superhydrophilicity and resistance to ultrasonic and sterilization treatments. Minimal adhesion of cells and bacteria occurs on the coatings, while maintaining cell viability.
Article
Polymer Science
Ruben Martin-Cabezuelo, Jose Carlos Rodriguez-Hernandez, Guillermo Vilarino-Feltrer, Ana Valles-Lluch
Summary: A novel spin-coating technique has been developed to obtain smooth, continuous polymeric surfaces from poly(glycerol sebacate) (PGS). Curing PGS pre-polymer under variable temperatures leads to networks with different chemical properties and topographies, making them suitable as biomaterials. Understanding material-protein interactions and cell behavior on PGS substrates is crucial for biological applications.
Article
Engineering, Biomedical
Patricia Costa, Liisa M. Blowes, Ana C. Laly, John T. Connelly
Summary: The study demonstrates that adhesive cues from the extracellular matrix guide collective epithelial polarity and migration, depending on adherens junctions and microtubules. Disruption of the microtubule network blocks collective polarization and inhibits directed migration of epithelial cells according to pre-established polarity.
ACTA BIOMATERIALIA
(2021)
Article
Chemistry, Physical
Xiyong Li, Xuan Li, Wenqin Wang
Summary: Poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes were grafted onto graphene oxide (GO) film using the self-initiated photografting and photopolymerization (SIPGP) method. Silver nanosheet-assembled microspheres were spontaneously grown on the GO-g-PDMAEMA film in [Ag(NH3)2]OH solution. The shape and size of the microspheres could be easily controlled by adjusting reaction time and the concentration of [Ag(NH3)2]OH solution. The obtained GO-g-PDMAEMA/Ag film exhibited excellent surface-enhanced Raman scattering (SERS) performances, with a limit of detection (LOD) of 10-16 M for 4-ATP and 10 ng/mL for thiram.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Polymer Science
Kajari Mazumder, Hartmut Komber, Eva Bittrich, Brigitte Voit, Susanta Banerjee
Summary: A series of novel sulfur containing high refractive index polymers were synthesized and their physico-chemical properties were investigated. The polymers showed high transparency and refractive index, along with high thermal stability and excellent mechanical properties, making them promising candidates for opto-electronic devices.
Article
Materials Science, Multidisciplinary
Megan Stokey, Rafal Korlacki, Matthew Hilfiker, Sean Knight, Steffen Richter, Vanya Darakchieva, Riena Jinno, Yongjin Cho, Huili Grace Xing, Debdeep Jena, Yuichi Oshima, Kamruzzaman Khan, Elaheh Ahmadi, Mathias Schubert
Summary: The anisotropic dielectric functions, phonon mode frequencies, and parameters of α-Ga2O3 were determined using experimental and computational methods, and compared with previous results. The same calculations were also performed for α-Al2O3, and the properties of the two compounds were compared. The possible evolution and behavior of phonon modes in the ternary alloy system were discussed.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Applied
Mathias Schubert, Sean Knight, Steffen Richter, Philipp Kuehne, Vallery Stanishev, Alexander Ruder, Megan Stokey, Rafal Korlacki, Klaus Irmscher, Petr Neugebauer, Vanya Darakchieva
Summary: We report on terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE) and its application in studying spin transitions in 4H-SiC. The technique eliminates the need for a cavity, allows independent scanning of field and frequency parameters, and does not require modulation. By using THz-EPR-GSE measurements, we can fully determine the polarization properties of spin transitions and obtain the g and hyperfine splitting parameters of coordinated nitrogen. The results show fundamental differences in measurements at positive and negative fields, providing additional information.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Megan Stokey, Teresa Gramer, Rafal Korlacki, Sean Knight, Steffen Richter, Riena Jinno, Yongjin Cho, Huili Grace Xing, Debdeep Jena, Matthew Hilfiker, Vanya Darakchieva, Mathias Schubert
Summary: The composition dependence of transverse and longitudinal optical infrared-active phonon modes in rhombohedral alpha-(AlxGa1-x)(2)O-3 alloys is determined using far-infrared and infrared generalized spectroscopic ellipsometry. The study reveals that these phonon modes exhibit single mode behavior, with their frequencies gradually shifting between the equivalent phonon modes of the binary parent compounds.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Matthew Hilfiker, Emma Williams, Ufuk Kilic, Yousra Traouli, Nate Koeppe, Jose Rivera, Assya Abakar, Megan Stokey, Rafal Korlacki, Zbigniew Galazka, Klaus Irmscher, Mathias Schubert
Summary: In this study, the elevated temperature dielectric function properties of melt grown single crystal ZnGa2O4 were investigated using a spectroscopic ellipsometry approach. The results show that the lowest energy critical point associated with the direct bandgap transition in ZnGa2O4 exhibits a red-shift and the excitonic amplitude decreases while the exciton broadening increases with increasing temperature.
APPLIED PHYSICS LETTERS
(2022)
Review
Physics, Applied
Joseph A. Spencer, Alyssa L. Mock, Alan G. Jacobs, Mathias Schubert, Yuhao Zhang, Marko J. Tadjer
Summary: This review focuses on the material and electronic properties of conducting and semiconducing oxides, with an emphasis on crystal, electronic, and band structures. It provides a comprehensive compilation of material properties and explores their potential applications in device technology. The review covers a range of oxides including Ga2O3, Al2O3, In2O3, SnO2, ZnO, CdO, NiO, CuO, and Sc2O3, discussing their crystal structures, electrical properties, thermal properties, and phonon properties. Alloys are also considered for their potential in improving and altering certain properties. Overall, the review offers insights into the application space of semiconducting oxide-based devices in electronic and optoelectronic applications.
APPLIED PHYSICS REVIEWS
(2022)
Article
Physics, Applied
Philipp Kuehne, Nerijus Armakavicius, Alexis Papamichail, Dat Q. Tran, Vallery Stanishev, Mathias Schubert, Plamen P. Paskov, Vanya Darakchieva
Summary: We report on the free charge carrier properties of a two-dimensional electron gas (2DEG) in an AlN/AlxGa1-xN high electron mobility transistor structure with a high aluminum content (x = 0.78). The 2DEG sheet density, mobility, and resistance at low temperatures are determined by terahertz optical Hall effect measurements. The experimental results show good agreement with theoretical calculations, except for an unexpected increase in the effective mass of 2DEG electrons at low temperatures. The possible mechanisms for this increase are discussed and quantified using self-consistent Poisson-Schrodinger calculations.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Matthew Hilfiker, Ufuk Kilic, Megan Stokey, Riena Jinno, Yongjin Cho, Huili Grace Xing, Debdeep Jena, Rafal Korlacki, Mathias Schubert
Summary: Mueller matrix spectroscopic ellipsometry is used to study the anisotropic optical properties of rhombohedral alpha-(AlxGa1-x)(2)O-3 thin films. The results show that the direction dependence of the lowest bandgap and band-to-band transitions changes with composition, and there is a band order switch at approximately 40% Al content.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Hanying Chen, Tianlin Li, Yifei Hao, Anil Rajapitamahuni, Zhiyong Xiao, Stefan Schoeche, Mathias Schubert, Xia Hong
Summary: We report the effect of remote surface optical (RSO) phonon scattering on carrier mobility in ferroelectric-gated monolayer graphene. Through the fabrication of monolayer graphene transistors gated by epitaxial (001) Ba0.6Sr0.4TiO3 films, we achieved a field effect mobility of up to 23,000 cm(2)V-1 s(-1). We also discovered that switching ferroelectric polarization can nonvolatilely modulate the resistance and quantum Hall effect in graphene at low temperatures. Using ellipsometry spectroscopy, we extracted the RSO phonon frequencies in Ba0.6Sr0.4TiO3.
JOURNAL OF APPLIED PHYSICS
(2022)
Review
Physics, Applied
Alexey Kimel, Anatoly Zvezdin, Sangeeta Sharma, Samuel Shallcross, Nuno de Sousa, Antonio Garcia-Martin, Georgeta Salvan, Jaroslav Hamrle, Ondrej Stejskal, Jeffrey McCord, Silvia Tacchi, Giovanni Carlotti, Pietro Gambardella, Gian Salis, Markus Muenzenberg, Martin Schultze, Vasily Temnov, Igor Bychkov, Leonid N. Kotov, Nicolo Maccaferri, Daria Ignatyeva, Vladimir Belotelov, Claire Donnelly, Aurelio Hierro Rodriguez, Iwao Matsuda, Thierry Ruchon, Mauro Fanciulli, Maurizio Sacchi, Chunhui Rita Du, Hailong Wang, N. Peter Armitage, Mathias Schubert, Vanya Darakchieva, Bilu Liu, Ziyang Huang, Baofu Ding, Andreas Berger, Paolo Vavassori
Summary: This article provides a comprehensive overview of recent developments, advances, and emerging research directions in the field of magneto-optics. It covers various applications of magneto-optical effects in different materials and spectral ranges. It serves as an important reference for emerging research directions in modern magneto-optics.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Polymer Science
Kajari Mazumder, Hartmut Komber, Eva Bittrich, Kai Uhlig, Brigitte Voit, Susanta Banerjee
Summary: This study reports the synthesis of sulfur-containing polyimides with high refractive index and their potential applications in optoelectronics. The polyimides exhibited high thermodynamic stability and flexibility, with the ability to tune their optical properties. The increase in sulfur and aromatic contents in the polymer backbone resulted in higher refractive index values.
Review
Engineering, Chemical
Kazi Albab Hussain, Cheng Chen, Ryan Haggerty, Mathias Schubert, Yusong Li
Summary: This article reviews the role and mechanisms of nanoparticles in enhancing oil recovery, and discusses the factors that control the success of nanoparticle applications. It also outlines the challenges and future research directions in the field of nanoparticle-enhanced oil recovery.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Zahra Barani, Tekwam Geremew, Megan Stokey, Nicholas Sesing, Maedeh Taheri, Matthew J. Hilfiker, Fariborz Kargar, Mathias Schubert, Tina T. Salguero, Alexander A. Balandin
Summary: This study demonstrates a unique class of quantum composites based on polymers with fillers composed of a van der Waals quantum material. These composites reveal multiple charge-density-wave quantum condensate phases. Typically, materials exhibiting quantum phenomena are crystalline, pure, and have few defects. However, in this research, the macroscopic charge-density-wave phases of the filler particles are successfully preserved even after multiple composite processing steps. The prepared composites display strong charge-density-wave phenomena at temperatures even above room temperature and show potential for advanced applications in energy storage and electronics.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Kazi Albab Hussain, Svetlana Romanova, Ilhami Okur, Dong Zhang, Jesse Kuebler, Xi Huang, Bing Wang, Lucia Fernandez-Ballester, Yongfeng Lu, Mathias Schubert, Yusong Li
Summary: This study revealed that microwave heating caused the highest release of microplastics and nanoplastics into food compared to other usage scenarios. Plastic containers and reusable food pouches can release millions to billions of particles through refrigeration, room-temperature storage, and microwave heating. The released microplastics and nanoplastics can potentially lead to cell death and pose risks to infants and toddlers.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Simon Schubotz, Quinn A. Besford, Saghar Nazari, Petra Uhlmann, Eva Bittrich, Jens-Uwe Sommer, Gunter K. Auernhammer
Summary: Polymer brushes, which are polymer chains tethered to substrates, are highly sensitive to adaptation and can undergo changes in swelling, adsorption, and reorientation due to the surrounding liquid or atmosphere. This study analyzes how the atmosphere surrounding an aqueous droplet affects the contact angle on polymer brush surfaces. The use of a coaxial needle allows for reliable measurement of wetting properties even when the droplet and atmosphere are not in equilibrium. It was found that the water contact angle of a sample can be significantly influenced by the composition and humidity of the surrounding atmosphere.
