Article
Chemistry, Multidisciplinary
Petra Martinovic, Markus Rohdenburg, Aleksandra Butrymowicz, Selma Sarigul, Paula Huth, Reinhard Denecke, Iwona B. Szymanska, Petra Swiderek
Summary: The study demonstrates that the performance of different Ag(I) complexes in FEBID critically depends on their molecular structure, with Ag(I) carboxylates containing aliphatic side chains being particularly favorable for FEBID.
Article
Chemistry, Analytical
Sangeetha Hari, P. H. F. Trompenaars, J. J. L. Mulders, Pieter Kruit, C. W. Hagen
Summary: This study demonstrates the use of focused electron beam-induced etching (FEBIE) as a direct-write technique for removing carbonaceous interconnecting material in high resolution dense lines. Secondary electron imaging and atomic force microscopy measurements were used to monitor the FEBIE process, confirming the successful fabrication of well-separated FEBID lines. The application of this technique for removing interconnecting material in dense lines was further validated using backscattered electron imaging.
Article
Nanoscience & Nanotechnology
Daqian Si, Zhihao Zhang, Zhiqiang Wang, Yinci Chen, Xu Gao, Bo Da, Hongxuan Guo, Litao Sun
Summary: In this study, nanopatterned hydrogels were fabricated using a scanning electron microscope. The distribution of electron scattering to induce hydrogel cross-linking was analyzed through an optimized Monte Carlo simulation with Pearson correlation coefficient analysis. The study found that the feature size of poly(ethylene glycol) diacrylate hydrogel was approximately 280 nm under certain conditions. This research provides a solution for the miniaturized preparation of nanohydrogels, which can enhance the density of arrays in nanosensors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jo-Chi Yu, Mohammed K. Abdel-Rahman, D. Howard Fairbrother, Lisa McElwee-White
Summary: FEBID and FIBID are direct-write fabrication techniques using focused beams of charged particles. Ultra high vacuum surface science studies provide mechanistic information on electron and ion-induced processes, aiding in the design of custom precursors for these techniques. Minimizing contamination in nanostructures is crucial for many applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Alix Tatiana Escalante-Quiceno, Ondrej Novotny, Jan Neuman, Cesar Magen, Jose Maria De Teresa
Summary: High-resolution micro- and nanostructures can be grown using Focused Electron Beam Induced Deposition (FEBID), and it has been used to grow magnetic tips for Magnetic Force Microscopy (MFM). This study examines the durability of FEBID magnetic tips for MFM measurements and finds that they remain effective over a long period of time, with a maximum reduction of 60% in magnetic signal after 21 weeks of recurrent use and no significant contrast degradation after 30 weeks in storage.
Article
Nanoscience & Nanotechnology
Cristiano Glessi, Aya Mahgoub, Cornelis W. Hagen, Mats Tilset
Summary: Seven gold(I) N-heterocyclic carbene complexes were synthesized, characterized, and tested as precursors for focused electron beam-induced deposition. The research showed that the most suitable organic ligand for the gold precursor is triazole-based, while the most suitable anionic ligand is the trifluoromethyl group.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Gemma Chapman, Mateus G. Masteghin, David C. Cox, Steven K. Clowes
Summary: This study presents the material and electrical properties of silicon dioxide insulators formed with a focused electron beam using TEOS or TMCTS precursors. It was found that the TEOS precursor produced a purer dielectric with a reduced carbon percentage, while the TMCTS precursor required an additional water vapor supply to suppress the carbon content. The resulting insulators from both precursors exhibited similar electrical properties.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Tianbo Duan, Hu Li, Klaus Leifer
Summary: This study reports an electron-beam-activated fluorination/defluorination cycle for achieving long-term preservation of chemical vapor deposition (CVD) graphene. After the cycle, the accumulation of airborne hydrocarbon on the graphene surfaces is reduced, and the initial chemical status of graphene can be restored.
Article
Nanoscience & Nanotechnology
Elif Bilgilisoy, Jo-Chi Yu, Christian Preischl, Lisa McElwee-White, Hans-Peter Steinrueck, Hubertus Marbach
Summary: The precise deposition of nanoscaled structures is crucial for nanomaterial applications. This study successfully fabricated clean and well-defined Ru nanomaterials using highly focused electron beam-induced deposition. The study found that the deposition process competed with the electron-induced etching, resulting in lower Ru content initially. However, with increasing electron doses, the Ru content increased and the etching process became less pronounced. This research expands the possibilities of engineering nanostructured materials.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Mohammed K. Abdel-Rahman, Patrick M. Eckhert, D. Howard Fairbrother
Summary: Ion-beam-induced deposition using Me3PtCpMe was studied through a combination of UHV surface science research and SEM data. The experiments showed that ion-induced deposition reaction cross sections are approximately two orders of magnitude greater, resulting in deposits with PtC5 stoichiometry. Ion-induced deposition also led to bimolecular methyl radical coupling to produce ethane.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Inorganic & Nuclear
I Utke, P. Swiderek, K. Hoflich, K. Madajska, J. Jurczyk, P. Martinovic, I. B. Szymanska
Summary: Nanostructured materials made from group 10 and 11 elements have significant technological relevance. Focused electron beam induced deposition is the only technique capable of fabricating nanostructures with arbitrary shape and dimensions below 10 nm. However, the chemistry of this process is not well understood and requires further optimization.
COORDINATION CHEMISTRY REVIEWS
(2022)
Review
Chemistry, Multidisciplinary
Cesar Magen, Javier Pablo-Navarro, Jose Maria De Teresa
Summary: FEBID is an advanced technique for the growth of 3D nanostructures, particularly in the field of nanomagnetism and technological applications. However, the basic physical properties of these structures are often seriously degraded due to the presence of contaminants.
Article
Chemistry, Multidisciplinary
Chen Fang, Yan Xing
Summary: This article investigates the shadow effect in the focused ion beam induced deposition process, and quantitatively describes and estimates the intensity of this effect through experiments and a numerical model. The study reveals significant variations in the adsorption contribution of precursor molecules within the shadow area and verifies the accuracy of the proposed model.
Review
Chemistry, Multidisciplinary
Pablo Orus, Fabian Sigloch, Soraya Sangiao, Jose Maria De Teresa
Summary: Superconductivity has been a fascinating and important field of study in physics and materials science since its discovery in 1911. Nanofabrication techniques using focused ion/electron beam induced deposition can downsize superconducting materials to the nanoscale, allowing for targeted and highly-flexible nanopatterning. Tungsten, niobium, molybdenum, carbon, and lead have been identified as the most notable superconducting materials used in functional devices.
Article
Multidisciplinary Sciences
Kristoffer Svendsen, Diego Guenot, Jonas Bjoerklund Svensson, Kristoffer Petersson, Anders Persson, Olle Lundh
Summary: This study demonstrates the transport and focusing of laser wakefield accelerated electron beams using electromagnetic quadrupole magnets, achieving precise control over dose distribution for improved radiotherapy effectiveness. Experimentation on acrylic slabs and radiochromic film phantoms successfully simulated the dose distribution of stereotactic radiotherapy treatment.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Ceramics
Xian Wu, Anja Weidner, Christos G. Aneziris, Horst Biermann
Summary: Compact cylinders and prismatic bars of carbon-bonded alumina without conventional pitch binder were prepared using an environment-friendly lactose-tannin binder system. The physical properties and microstructural analysis of the specimens were characterized, and the rheological behavior of the slurries was studied. Mechanical tests were performed at room temperature and high temperatures, showing a brittle-to-ductile transition between 1100°C and 1300°C. The bending strength of the bars was lower compared to pitch-based ones, possibly due to early hardening and structural changes during heating.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Hamoon Hemmatpour, Vahid Haddadi-Asl, Thomas C. Q. Burgers, Feng Yan, Marc C. A. Stuart, Catharina Reker-Smit, Rifka Vlijm, Anna Salvati, Petra Rudolf
Summary: In this study, a new temperature-responsive nanocarrier based on halloysite nanotubes and poly(N-isopropylacrylamide) brushes was designed and characterized. The hybrid material showed a phase transition temperature of about 32 degrees C, and exhibited temperature-dependent drug release. Cell studies confirmed reduced cytotoxicity due to the poly(N-isopropylacrylamide) brushes, and drug release studies demonstrated the controlled release of doxorubicin. Additionally, the internalization of the nanotubes in HeLa cells was confirmed using stimulated emission depletion nanoscopy.
Article
Multidisciplinary Sciences
Tommaso Caruso, Oreste De Luca, Nicola Melfi, Alfonso Policicchio, Michele Pisarra, Nicolas Godbert, Iolinda Aiello, Eugenia Giorno, Daniela Pacile, Paolo Moras, Fernando Martin, Petra Rudolf, Raffaele Giuseppe Agostino, Marco Papagno
Summary: The synthesis and design of two-dimensional supramolecular assemblies with specific functionalities is a challenging goal in molecule-based electronics. In this study, we report a novel approach to prepare wide highly crystalline molecular assemblies with tunable structural properties. By utilizing the reactivity of carboxylic acid functional moiety and the predictable features of non-polar alkane chains, we successfully synthesized 2D supramolecular assemblies on a Au(111) surface. These assemblies showed a self-limited highly ordered and defect-free two-dimensional single-layer film of micrometer-size, which could be modified in a controlled way by changing the length of the alkane chains.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Jianwu Sun, Guillermo Monreal Santiago, Feng Yan, Wen Zhou, Petra Rudolf, Giuseppe Portale, Marleen Kamperman
Summary: To better utilize keratin resources, the current extraction and processing methods need to be improved or replaced. A new study developed an environmentally friendly method using HCl to induce the formation of a coacervate and successfully produced high-performance keratin fibers without heating or organic solvents.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Christina Alatzoglou, Michaela Patila, Archontoula Giannakopoulou, Konstantinos Spyrou, Feng Yan, Wenjian Li, Nikolaos Chalmpes, Angeliki C. Polydera, Petra Rudolf, Dimitrios Gournis, Haralambos Stamatis
Summary: In this study, few-layer bio-Graphene (bG) was produced through liquid exfoliation of graphite in the presence of bovine serum albumin. The quality of the nanomaterial was confirmed through microscopic characterization, and spectroscopic techniques verified the presence of bovine serum albumin on the graphene sheets. The bG was used as a support for the covalent co-immobilization of beta-glucosidase, glucose oxidase, and horseradish peroxidase, demonstrating high immobilization yields and activity recoveries.
Article
Nanoscience & Nanotechnology
Adrivit Mukherjee, Afshin Dianatdar, Magdalena Z. Gladysz, Hamoon Hemmatpour, Mart Hendriksen, Petra Rudolf, Malgorzata K. Wlodarczyk-Biegun, Marleen Kamperman, Ajay Giri Prakash Kottapalli, Ranjita K. Bose
Summary: This study successfully fabricated doped polypyrrole ultrathin nanostructured coatings on polyurethane films via oxidative chemical vapor deposition to develop stretchable and flexible resistance-based strain sensors. These nanocomposites exhibit excellent stretchability, fatigue resistance, and show a reversible change of electrical resistance when subjected to consecutive cycles of stretching and releasing. They also demonstrate biocompatibility towards human dermal fibroblasts, providing a promising path for wearable, skin-mountable flexible electronics in biomedical applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Multidisciplinary Sciences
Hamoon Hemmatpour, Oreste De Luca, Dominic Crestani, Marc C. A. Stuart, Alessia Lasorsa, Patrick C. A. van der Wel, Katja Loos, Theodosis Giousis, Vahid Haddadi-Asl, Petra Rudolf
Summary: Polydopamine formation on halloysite nanotubes was systematically investigated. The oxidative coupling reaction of dopaminechrome molecules was found to be the main reaction pathway, leading to the formation of polycatecholamine oligomers as intermediates, followed by the post cyclization of linear oligomers. Furthermore, TRIS molecules were incorporated into the initially formed oligomers.
NATURE COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Myrto G. Bellou, Michaela Patila, Renia Fotiadou, Konstantinos Spyrou, Feng Yan, Petra Rudolf, Dimitrios P. Gournis, Haralambos Stamatis
Summary: In the field of biocatalysis, the implementation of sustainable processes such as enzyme immobilization or the use of environmentally friendly solvents is highly important. This study focused on the extraction of tyrosinase from fresh mushrooms and its carrier-free immobilization to create non-magnetic and magnetic cross-linked enzyme aggregates (CLEAs). The results showed that the nature and concentration of Deep Eutectic Solvents (DESs) significantly affected the catalytic activity and stability of tyrosinase, with immobilization increasing the enzyme's activity up to 3.6-fold. The biocatalyst also demonstrated great potential in modifying chitosan with caffeic acid, enhancing the films' antioxidant activity.
Article
Materials Science, Multidisciplinary
Dinorah I. Rodriguez-Otamendi, Monserrat Bizarro, Victor Meza-Laguna, Edgar Alvarez-Zauco, Petra Rudolf, Vladimir A. Basiuk, Elena V. Basiuk
Summary: Nanostructured hybrids of graphene oxide and palladium were synthesized through one-step solvent-free gas phase treatment, followed by in situ decoration with palladium in the liquid medium. The proposed method offers an eco-friendly alternative for obtaining nanohybrids of graphene oxide and palladium nanoparticles under mild conditions. The hybrids demonstrated the formation of nanometer-sized crystalline palladium particles, with larger particle sizes observed for diamine-functionalized substrates compared to monoamine or non-functionalized substrates. The thermal stability of the obtained hybrids was slightly lower than pristine graphene oxide.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Giovanna Feraco, Oreste De Luca, Ali Syari'ati, Sardar Hameed, Abdurrahman Ali El Yumin, Jianting Ye, Raffaele G. Agostino, Petra Rudolf
Summary: Vacancies in atomically thin molybdenum disulphide are crucial for controlling its optical and electronic properties. Defect engineering using thiol-terminated molecules was used to heal and functionalize defective nanosheets. Functionalization with 4-aminothiophenol, biphenyl-4-thiol, and 4-nitrothiophenol was explored, showing that these molecules can heal defects and affect the optical response.
JOURNAL OF PHYSICS-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qi Chen, Wenjian Li, Feng Yan, Dina Maniar, Jur van Dijken, Petra Rudolf, Yutao Pei, Katja Loos
Summary: This study presents a facile method for synthesizing cellulose films using hollow stellate cellulose (HSC) from wetland weed. The triboelectric polarities of HSC films are controlled by adjusting the content of silane coupling agents. By coating Ag nanowire electrodes on one side of the HSC friction layers, flexible and lightweight HSC-TENGs with high output voltage are obtained. The optimized HSC-TENG is applied as a wearable self-powered sensor for gait analysis, demonstrating stable and sustainable performances.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
David Garcia Romero, Lorenzo Di Mario, Feng Yan, Carolina Mishell Ibarra-Barreno, Suhas Mutalik, Loredana Protesescu, Petra Rudolf, Maria Antonietta Loi
Summary: The interfaces between the photoactive layer and the transport layers play a critical role in determining the efficiency and stability of organic solar cells. This study reveals that a commercially available colloidal SnO2 dispersion leads to suboptimal interfaces and poor stability. Removing potassium ions as stabilizing ligands improves the interfaces and enhances the efficiency and stability of the solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Theodosis Giousis, Shun Fang, Matteo Miola, Shuangxue Li, Alexandros Lazanas, Mamas Prodromidis, Eelco K. Tekelenburg, Dimitrios Moschovas, Maria A. Loi, Petra Rudolf, Dimitrios Gournis, Paolo P. Pescarmona
Summary: This study investigated germanane (GeH) and butyl-functionalized germanane (GeBuxH(1_x)) as photocatalysts for water purification under visible light irradiation. GeH showed the best activity in the degradation of rhodamine B, while GeBuxH(1_x) proved to be the best photocatalyst for the degradation of phenol.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Pablo Gonzalez Cortes, Rodrigo Araya-Hermosilla, Kerry Wrighton-Araneda, Diego Cortes-Arriagada, Francesco Picchioni, Feng Yan, Petra Rudolf, Ranjita K. Bose, Franck Quero
Summary: The thermal properties of polymers depend on their chemical structure and intermolecular forces. By chemically modifying polyketones and increasing the amount of supramolecular interactions, the glass transition temperature of polyketones can be tuned. The research shows that modification with aminomethyl benzoic acid and aminohexanoic acid introduces new hydrogen bonding possibilities and significantly increases the glass transition temperature, while modification with an imidazole derivative introduces new and stronger pi-pi interactions.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Lijun Chen, Eelco Kinsa Tekelenburg, Kushagra Gahlot, Matteo Pitaro, Jun Xi, Alessia Lasorsa, Giovanna Feraco, Loredana Protesescu, Patrick C. A. van der Wel, Giuseppe Portale, Petra Rudolf, Christoph J. Brabec, Maria Antonietta Loi
Summary: This study successfully prepared lead-tin perovskite films with a gradient structure using scalable techniques, and improved the surface traps and crystallization by adding tin selenide. The fabricated devices exhibited high power conversion efficiency and stability, and were able to resist environmental factors.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
