Article
Chemistry, Multidisciplinary
Nils Ulrich, Anne Spende, Loic Burr, Nicolas Sobel, Ina Schubert, Christian Hess, Christina Trautmann, Maria Eugenia Toimil-Molares
Summary: Etched ion-track polycarbonate membranes with conical nanochannels coated with Al2O3, TiO2, and SiO2 thin films by ALD are used to fabricate two functional structures: arrays of free-standing conical nanotubes for drug delivery and wettability regulation, and single nanochannel membranes for nanofluidic applications with adjustable isoelectric points.
Article
Electrochemistry
Yuehong Zeng, Huiming Wang, Muhammad Rauf, Hongwei Mi, Lingna Sun, Qixing Wu, Qianling Zhang, Xiangzhong Ren, Yongliang Li
Summary: In this study, a synergistic effect between carbon nanotube (CNT) network and atomic layer deposition (ALD) of TiO2 is reported. The CNTs and TiO2 work together to capture zinc ions and suppress dendrite growth, resulting in uniform deposition during repeated cycles. The modified anode (TiO2-CNT@Zn anode) exhibits high plating/stripping reversibility and ultralong lifespan. Furthermore, the Zn-MnO2 battery with the TiO2-CNT@Zn anode shows enhanced cycling stability.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Li Sun, Jiayue Xie, Guanglu Lei, Xianghong Liu, Jianmin Ma, Jun Zhang
Summary: TiO2@Void@SnO2 double-shell hollow nanotubes were synthesized to enhance the electrochemical properties of Sn-based anode materials, showing stable capacity and long cycling stability. The unique structure effectively accommodates volume change and prevents SnO2 pulverization.
Article
Nanoscience & Nanotechnology
Na Li, Xiwei Lan, Libin Wang, Yingjun Jiang, Songtao Guo, Yaqian Li, Xianluo Hu
Summary: This study demonstrates that controlled fabrication of orthorhombic Nb2O5 nanotubes with wall thicknesses from 24 to 43 nm can enhance lithium-ion diffusion kinetics, showing potential for advanced energy-storage devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
J. I. Paez-Ornelas, H. N. Fernandez-Escamilla, H. A. Borbon-Nunez, H. Tiznado, Noboru Takeuchi, J. Guerrero-Sanchez
Summary: The study investigates the atomic layer deposition of ZnO/CNT hybrid inorganic structures, showing the chemical activation of CNTs with a carboxylic acid, followed by the formation of ZnO using DEZ and water as precursors. It highlights the energy barriers and ligand-exchange mechanisms during the deposition process, emphasizing the importance of the right functionalization agent and the role of the oxidizing agent in lowering energy barriers.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Engineering, Chemical
Hao Gu, Dennis T. Lee, Peter Corkery, Yurun Miao, Jung-Sik Kim, Yuchen Yuan, Zhen-liang Xu, Gance Dai, Gregory N. Parsons, Ioannis G. Kevrekidis, Liwei Zhuang, Michael Tsapatsis
Summary: Atomic layer deposition (ALD) is a promising technique for fabricating membranes with precision at the atomic level. In this study, we developed models to simulate the deposition process of ALD in mesoporous substrates. The models were validated with experimental data and used to design a modified ALD process for zeolitic imidazolate framework (ZIF) membranes. This research provides a new understanding of deposit formation via ALD in mesoporous substrates for various membrane applications.
Article
Chemistry, Multidisciplinary
Yuanlu Tsai, Zhiteng Li, Shaojie Hu
Summary: This article reviews the current developments in atomic layer technology for spintronics, including atomic layer deposition (ALD) and atomic layer etching (ALE). The importance of these techniques in device fabrication is discussed, along with their applications in various materials. The article also compares the critical factors of ALD and ALE and explores the future prospects and challenges of atomic layer technology in spintronics.
Article
Materials Science, Multidisciplinary
Yun Wang, Ruishuai Wang, Hongzheng Zhu, Wenfeng Jiang, Jia Guo, Dong Yang, Liang Liu, Jian Liu
Summary: A method for fabricating an artificial solid electrolyte interphase (SEI) by atomic layer deposition (ALD) of an ultrathin Al2O3 layer on a multi-walled carbon nanotubes (MWCNTs) anode for high-performance potassium ion batteries (PIBs) is reported. The SEI resistance and charge transfer resistance in the MWCNTs electrode are significantly reduced, leading to a higher initial Coulombic efficiency (ICE) of 85.9% and a high reversible capacity of 284 mA h g(-1) after 100 cycles. The anode also exhibits excellent rate capability, with capacities of 558, 303, 251, 203, and 154 mAh g(-1) at different current densities. This work provides an effective approach for fabricating PIBs with high ICE and electrochemical performance.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Yuan Guo, Shixin Wang, Xianfeng Du, Shuaizhong Liang, Shan Huang, Shengjun Peng, Yuehong Xie, Mingbo Ma, Lilong Xiong
Summary: Energy storage technology is crucial for a clean and sustainable energy supply. This study demonstrates a promising strategy for developing new energy storage devices with high energy and power density by using laser etching to obtain spatial multilayer VCNTs electrode nano-templates. The MIM capacitors constructed in this way have high planar capacity density, low leakage characteristic, and excellent performance stability.
ENERGY STORAGE MATERIALS
(2023)
Article
Energy & Fuels
Maga Baek, Jaeseong Yoo, Yunjung Kim, Yong-Jin Jang, Hyungeun Seo, Sung-Min Lee, Hearin Jo, Sang-Gil Woo, Jae-Hun Kim
Summary: A surface modification method was proposed to improve the performance of porous polyethylene (PE) polymer film as separators in Li-ion batteries (LIBs) by introducing a carbonyl group (C=O) and an imine functional group (R-N=C) onto the surface through nucleophilic addition of amine in a solution. The surface-modified PE separator exhibited enhanced wettability and thermal stability, resulting in increased ionic conductivity of the electrolyte and rate capability of the cells without any negative effect on the physical and electrochemical properties of the separator.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Jeanne Casetta, Celine Pochat-Bohatier, David Cornu, Mikhael Bechelany, Philippe Miele
Summary: By modifying the surface of polysulfone hollow fiber membranes using atomic layer deposition (ALD), coatings of titanium dioxide (TiO2), zinc oxide (ZnO), and alumina (Al2O3) can be applied to enhance the membrane's permeability and fouling resistance.
Article
Engineering, Chemical
Shankar Dutt, Pavel Apel, Nikolay Lizunov, Christian Notthoff, Qi Wen, Christina Trautmann, Pablo Mota-Santiago, Nigel Kirby, Patrick Kluth
Summary: High aspect-ratio nanopores with nearly cylindrical geometry were fabricated by ion irradiation and etching, with the shape of the nanopores tapering towards the polymer surfaces. Using SAXS, the tapered structure was quantitatively measured, and it was found that the etch rates slightly decrease with increasing fluence. The observed nanopore shape was found to significantly influence the pore transport properties, with water flow rates being affected compared to cylindrical pores.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Tae-Nam Kim, Jieun Lee, Jeong-Hun Choi, Ji-Hoon Ahn, Euntae Yang, Moon-Hyun Hwang, Kyu-Jung Chae
Summary: Plasma-enhanced atomic layer deposition (ALD) was used to functionalize the surface of a graphene oxide (GO) membrane with a ultra-thin and uniform metal oxide (Al2O3) layer, resulting in improved water permeability and salt rejection. Characterization of the formed Al2O3 layer through FTIR, XPS, XRD, and d-spacing measurements revealed that the enhanced water permeability was mainly attributed to increased surface hydrophilicity. Overall, the distinctive features of the ALD-treated GO membrane show potential for enhancing its application in brackish water desalination.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Ghader Mahmodi, Anil Ronte, Shailesh Dangwal, Phadindra Wagle, Elena Echeverria, Bratin Sengupta, Vahid Vatanpour, David N. Mcllroy, Joshua D. Ramsey, Seok-Jhin Kim
Summary: The study developed ZnO ALD modified membranes for treating high-salt and oil content produced water, which showed significant improvements in water flux, TOC rejection, TDS reduction, and anti-fouling property. The ZnO ALD membrane has great potential for purifying produced water.
Review
Engineering, Chemical
Sen Xiong, Xiaofeng Qian, Zhaoxiang Zhong, Yong Wang
Summary: Membrane separation plays a crucial role in providing clean water and resources, and atomic layer deposition (ALD) is an effective strategy to enhance membrane performance. ALD improves the hydrophilicity and fouling resistance of membranes, while integrating new functionalities into membrane separation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Analytical
Ch E. Duellmann, E. Artes, A. Dragoun, R. Haas, E. Jaeger, B. Kindler, B. Lommel, K-M Mangold, C-C Meyer, C. Mokry, F. Munnik, M. Rapps, D. Renisch, J. Runke, A. Seibert, M. Stoeckl, P. Thoerle-Pospiech, C. Trautmann, N. Trautmann, A. Yakushev
Summary: This article discusses the production of heavy elements through actinide-target based nuclear fusion reactions with intense heavy-ion beams. It emphasizes the need for improved target properties and the importance of analyzing target changes in the beam.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Christian Nweze, Tomke E. Glier, Mika Rerrer, Sarah Scheitz, Yalan Huang, Robert Zierold, Robert Blick, Wolfgang J. Parak, Nils Huse, Michael Ruebhausen
Summary: In this study, the plasmonic gold nanoparticles injecting hot carriers into the topological insulator interface of Bi2Se3 nanoribbons were investigated using resonant Raman spectroscopy. The impact of individual gold particles with different sizes on the topological surface states and the phonon modes were resolved. The findings suggest the possibility of locally controlling the electronic properties of the topological insulator by metal nanoparticles through hot carrier injection.
Article
Instruments & Instrumentation
C. Mejia, G. S. Vignoli Muniz, M. Bender, D. Severin, C. Trautmann, B. Auge, A. N. Agnihotri, P. Boduch, A. Domaracka, H. Rothard
Summary: This study investigates the physical and chemical modifications of thymine under ion irradiation in cryogenic conditions. The degradation of thymine was monitored using FTIR spectroscopy, and the destruction cross-section was determined. New molecular species formed under irradiation were also identified.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Physics, Applied
Marc Wenskat, Getnet Kacha Deyu, Isabel Gonzalez Diaz-Palacio, Robert H. Blick, Robert Zierold, Wolfgang Hillert
Summary: Surface modification of SRF cavities is crucial for advancing future accelerators, and one effective method is depositing multilayer superconducting and insulating materials on the inner surface. In this study, we successfully coated an SRF cavity with low-temperature insulating Al2O3 -1 and observed an improvement in surface resistance above 30 MV m(-1), likely due to enhanced oxygen diffusion during the deposition process. Our results demonstrate the suitability of ALD for providing conformal coating and modifying the properties of such devices.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mohan Li, Nils Ulrich, Ina Schubert, Wilfried Sigle, Michael Florian Peter Wagner, Christina Trautmann, Maria Eugenia Toimil-Molares
Summary: This study reports on the catalytic performance of highly interconnected networks of gold nanowires with customized diameters between 80 and 170 nm. The networks were synthesized through electrodeposition in etched ion-track polymer templates, with optimized conditions for enhanced wire crystallinity and network homogeneity. These self-supporting nanowire networks exhibited an increased electrochemically active surface area as the wire diameter increased. The networks demonstrated remarkable stability during 200 CV cycles of methanol oxidation reactions, with a peak current density up to 200 times higher than that of a flat reference electrode, and only a 5% drop in peak current density. The gold nanowire networks proved to be excellent model systems for studying porous catalyst performance and promising nanosystems for direct alcohol fuel cell catalyst applications.
Article
Electrochemistry
Jia Luo, Mu Lan, Michael Wagner, Nils Ulrich, Peter Kopold, Ioannis Tzifas, Hongyan Wang, Christina Trautmann, Maria Eugenia Toimil-Molares
Summary: We transformed free-standing Cu nanowire arrays into metal-organic frameworks KHUST-1 through electrochemical oxidation. The formation of HKUST-1 particles was confirmed through the binding of Cu2+ ions and benzene tricarboxylic acid ligands in the electrolyte solution. The morphology and crystallinity of the samples at different transformation stages were investigated, and the formation of octahedral structures of several mu m in size was observed.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
V. Velthaus, C. Trautmann, M. Bender
Summary: Ion-induced desorption in heavy ion accelerator facilities is limited by beam intensity and life time. The effects of surface conditions and bulk materials on gas desorption were investigated by irradiating oxygen-free copper, tungsten, and aluminum samples with 4.8 MeV/u Ca and Au ions. Various pretreatments of milling, lapping, polishing, and etching were applied to the surfaces, while the bulk material was conditioned by thermal annealing. Desorption yields of H2, H2O, CO, and CO2 were presented for all tested samples. Diamond milling and polishing reduced ion-induced desorption to some extent, but the most significant effects were achieved through ex-situ thermal annealing at 400 degrees C for about 4 hours under ultra-high vacuum conditions. The decreased desorption persisted even after 9 months of storage in atmosphere, indicating the importance of optimizing both surface properties and bulk material treatment for mitigating desorption stimulated by high energy ion exposure. Storage of annealed samples in argon was found to be more favorable than storage in atmosphere.
Article
Nanoscience & Nanotechnology
Nils Ulrich, Michelle Schaefer, Melina Roemer, Sascha Dominic Straub, Siyuan Zhang, Joachim Broetz, Christina Trautmann, Christina Scheu, Bastian J. M. Etzold, Maria Eugenia Toimil-Molares
Summary: Three-dimensional and highly interconnected copper nanowire networks were prepared by electro-deposition in etched ion track polymer templates and used as catalysts for electrochemical CO2 reduction in an aqueous electrolyte to produce hydrocarbons and alcohols. The specific surface area of the nanowire networks could be adjusted by controlling the wire length, diameter, and number density, ranging from 70 cm2 to 300 cm2 per cm2 sample area. The conversion efficiency and selectivity of CO2 reduction were studied as a function of the applied potential, and the stability of the nanowire networks during CO2 reduction was confirmed.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Lucjan Grzegorzewski, Robert Zierold, Robert H. Blick
Summary: In this study, a novel coupling-based sensor operating at 20 GHz was designed to increase the sensitivity for detecting nanoscale objects. The sensor's geometry was fine-tuned for an optimal coupling coefficient, and its performance was compared with that of conventional sensors. The exceptional sensitivity of the sensor was demonstrated through the in-flow detection of 200 nm-sized polystyrene beads, achieving a high signal-to-noise ratio.
IEEE SENSORS JOURNAL
(2023)
Correction
Physics, Applied
Isabel Gonzalez Diaz-Palacio, Marc Wenskat, Getnet Kacha Deyu, Wolfgang Hillert, Robert H. Blick, Robert Zierold
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Isabel Gonzalez Diaz-Palacio, Marc Wenskat, Getnet Kacha Deyu, Wolfgang Hillert, Robert H. Blick, Robert Zierold
Summary: In this study, NbTiN thin films were grown by plasma-enhanced atomic layer deposition (PEALD) on AlN in a supercycle approach, and two different post-deposition thermal treatments were applied to improve the film quality. The optimized films achieved a highest superconducting critical temperature (Tc) of 15.9 K and a lower critical field (Hc1) of 213 mT, which surpasses the intrinsic limit of bulk Nb. These findings provide a promising starting point for the development of tailored thin films based SRF cavities.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Carl-Christian Meyer, Ernst Artes, Markus Bender, Joachim Broetz, Christoph E. Duellmann, Constantin Haese, Egon Jaeger, Birgit Kindler, Bettina Lommel, Marton Major, Maximilian Rapps, Dennis Renisch, Christina Trautmann, Alexander Yakushev
Summary: The maximum thickness and irradiation stability of current generation actinide targets have hindered progress in the discovery and study of new superheavy elements. This study successfully produced lanthanide targets using anhydrous electrochemical routes and conducted irradiation tests.
Article
Chemistry, Multidisciplinary
Carina Hedrich, Anna R. Burson, Silvia Gonzalez-Garcia, Victor Vega, Victor M. Prida, Abel Santos, Robert H. Blick, Robert Zierold
Summary: Photonic crystals are important for photocatalytic applications, as they can enhance the photocatalytic activity by adjusting the position of the photonic stopband. Coating photocatalysts onto designed photonic crystals utilizing the slow photon effect can improve the degradation efficiency of organic dyes. Additionally, an ultra-thin alumina coating can reduce the degradation of photocatalysts.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
Stefanie Haugg, Marina Creydt, Robert Zierold, Markus Fischer, Robert H. H. Blick
Summary: Top-down proteomics involves the characterization of intact biomolecules through MALDI-TOF mass analysis, allowing for the detection of protein-level modifications. In this study, we modified the MCP detector to amplify the signal from ionized proteins, resulting in increased detection efficiency of high-mass biomolecules. Experimental results showed that the signal intensity of BSA and IgG ions was amplified by a factor of 24.3 and 10.7, respectively, using the booster-MCP detector.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
T. Fiuza, M. Sarkar, J. C. Riedl, M. Beaughon, B. E. Torres Bautista, K. Bhattacharya, F. Cousin, E. Barruet, G. Demouchy, J. Depeyrot, E. Dubois, F. Gelebart, V. Geertsen, G. Meriguet, L. Michot, S. Nakamae, R. Perzynski, V. Peyre
Summary: This study investigates the dispersion properties of charged maghemite nanoparticles in ethylammonium nitrate ionic liquid using various experimental techniques. The nature of ionic species at the nanoparticle/ionic liquid interface has a significant influence on the spatial organization of ions and the colloidal stability of the dispersions. The interactions between nanoparticles and the ionic liquid are characterized by the second virial coefficient and the dynamical effective charge of the nanoparticles. The alkaline counterions impact the macroscopic properties of the dispersion by tuning interparticle and particle/solvent interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)