Article
Chemistry, Multidisciplinary
Bowen Shen, Cuihua Dai, Di Hu, Xiaoyang Yu, Xiaojun Tan, Jie Sun, Jun Jiang, Anquan Jiang
Summary: Single LiNbO3 crystals are widely used in various devices due to their excellent electro-optic and piezoelectric properties. However, their nanofabrication still faces challenges. This study explores different etching methods to achieve high etching rates and improved sidewall angles. Different etching conditions provide multiple processing paths for the versatile application of LiNbO3.
Article
Chemistry, Multidisciplinary
Marcus J. Giansiracusa, Michele Vonci, Yasmin L. Whyatt, Carys Williams, Kevin Mason, David Parker, Eric J. L. McInnes, Nicholas F. Chilton
Summary: EPR spectroscopy is used to show that a t-butyl-pyridyl-functionalised Er-III DOTA derivative coordinates water, while its methylphosphinate analogue does not.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Hyun-Joong Kim, Soong-Geun Je, Kyoung-Woong Moon, Won-Chang Choi, Seungmo Yang, Changsoo Kim, Bao Xuan Tran, Chanyong Hwang, Jung-Il Hong
Summary: Research has shown the programmable exchange-coupled DW motion in antiferromagnet/ferromagnet system, where the role of an external in-plane field is replaced by the exchange bias field from the antiferromagnetic layer, enabling external field-free modulations of DW motions. Furthermore, the direction of the exchange bias field can be reconfigured by simply injecting spin currents through the device, enabling electrical and programmable operations of the device.
Article
Polymer Science
Hao Liu, Runmin Tian, Chunxu Liu, Jinghan Zhang, Mingwei Tian, Xin Ning, Xingyou Hu, Hang Wang
Summary: In this study, a novel method called direct electrostatic deposition was used to prepare a proton exchange membrane (PEM). This method allows precise control over the thickness and size of the PEM. By directly spraying a Nafion solution containing amino modified SiO2 nanoparticles onto a metal collector, a hybrid membrane with a thickness of 30 μm was fabricated. The direct electrostatic deposition method showed potential benefits for the preparation of ultrathin PEMs, as evidenced by the higher power density achieved by the DMFC assembled with the prepared ultrathin membrane.
Article
Materials Science, Multidisciplinary
E. D. Savelyev, A. R. Akhmatkhanov, E. D. Greshnyakov, A. S. Abramov, H. Tronche, F. Doutre, T. Lunghi, P. Baldi, M. M. Neradovskiy, V. Ya Shur
Summary: The study focuses on the domain growth in congruent LiNbO3 crystals with planar soft proton exchanged waveguides (CLN SPE). Confocal Raman microscopy was used to measure the spatial distribution of H ions, revealing the growth of elongated irregular shape domains and subsequent slow domain widening. Domain approaching resulted in a change in the growth directions, while domain widening indicated the formation of submicron domains with depth of tens of microns in front of the domain walls. The low threshold field is attributed to the surface composition gradient, and the suppression of hexagonal domain growth is related to the existence of the surface dielectric layer.
Article
Chemistry, Physical
Houpeng Wang, Zhaoxiang Xu, Wei Lin, Xue Yang, Xianrui Gu, Wei Zhu, Zhongbin Zhuang
Summary: The impeded mass transfer rate by gas bubbles generated on-site significantly reduces the energy conversion efficiency of the proton exchange membrane water electrolyzer. This study demonstrates that a surfactant-assistant method can accelerate the detachment of nano/micro-bubbles and the mass transfer rate, leading to an increase in overall efficiency. One specific surfactant, potassium perfluorobutyl sulfonate, shows significant promotion of activity and stability for hydrogen evolution reaction and oxygen evolution reaction in acidic medium, especially at high current density region.
Article
Materials Science, Multidisciplinary
Duk-Hyun Choe, Sunghyun Kim, Taehwan Moon, Sanghyun Jo, Hagyoul Bae, Seung-Geol Nam, Yun Seong Lee, Jinseong Heo
Summary: A new topological class of domain walls in orthorhombic HfO2 was discovered, revealing an atomic-scale mechanism of polarization switching with unexpectedly low energy barriers of domain wall motion. This challenges previous beliefs and provides a strategy to reduce coercive fields in HfO2-based ferroelectric devices.
Article
Chemistry, Physical
Houpeng Wang, Zhaoxiang Xu, Wei Lin, Xue Yang, Xianrui Gu, Wei Zhu, Zhongbin Zhuang
Summary: In this study, a surfactant-assisted method is reported to accelerate the detachment of nano/micro-bubbles and promote the mass transfer rate by reducing surface tension, leading to an increase in energy conversion efficiency of the proton exchange membrane water electrolyzer (PEMWE). Among the studied surfactants, only potassium perfluorobutyl sulfonate (PPFBS) showed significant activity and stability enhancement for both hydrogen and oxygen evolution reactions (HER and OER) in the acidic medium at high current density. The addition of PPFBS reduced the HER overpotential by 22% at 0.1 A·cm(-2) and increased the current density by 31% at -0.4 V.
Article
Chemistry, Multidisciplinary
Yanran Zhu, Qian Chen, Yue Zhou, Xingya Li, Liang Ge, Tongwen Xu
Summary: Acid recycling through cation exchange membranes (CEMs) has gained significant attention in traditional and advanced manufacturing industries due to its economic and environmental benefits. However, current polymeric CEMs lack bi-functional sites and only have constant ion channels. In this study, a series of dibenzo-18-crown-6 (DB18C6) functionalized sulfonated poly(biphenyl alkylene) membranes were developed. These membranes formed ordered ion channels through electrostatic interactions, resulting in a low-swelling synergistic hydrophilic network. The prepared membranes exhibited high proton permeation rates and a high selectivity for H+/Fe2+ transport, surpassing previously reported membranes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Juan Li, Jing Wang, Zhenzhen Wu, Shanshan Tao, Donglin Jiang
Summary: The research presents a strategy for designing porous polybenzimidazole frameworks to address issues related to phosphoric acid proton carrier leakage and slow proton transport. The materials exhibit ultrafast and stable proton conduction, suitable for low proton carrier content and activation energy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Inorganic & Nuclear
Jing Xi, Peipei Cen, Yan Guo, Yuzhu Li, Yuanyuan Qin, Yi-Quan Zhang, Weiming Song, Xiangyu Liu
Summary: The reversible single-crystal-to-single-crystal conversion of PBP Dy(III) complexes has been achieved, providing insights into the magnetic switches with fascinating transformation processes.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Zhen Liu, Xiandong Zhou, Biao Feng, Bai-Xiang Xu
Summary: This study shows that large flexoelectricity in thin films can result in exotic in-plane superdomains, and the tip-induced flexoelectric field can tune the polarization nucleation during cooling. This research provides a new approach to create and manipulate desired superstructures, offering a framework for developing engineering techniques in conjunction with phase-field modeling.
Article
Polymer Science
Osung Kwon, JaeHyoung Park
Summary: This study used electrostatic force microscopy (EFM) to investigate the impact of ionic channel distribution on the proton conductivity of Nafion-sulfonated silica (SSA) composite membranes. The results showed that Nafion-SSA had twice the average local ionic channel density compared to pristine Nafion, and the distribution of the ionic channel density was non-uniform. Additionally, local agglomerations were observed in approximately 10% of the scanned area, attributed to the presence of SSA. These findings are significant for the quantitative assessment of proton exchange membranes (PEMs).
Article
Multidisciplinary Sciences
Valentin Duruisseaux, Joshua W. Burby, Qi Tang
Summary: This study examines the different mechanisms of action and indications of headgear-activator (vBHGA) and twin-block appliances in treating malocclusion, as well as their impact on a patient's facial height, overbite, and growth. However, the article lacks information on patient selection criteria and the use of a clip-overbite plate with an inclined plane worn with fixed appliances, which should be further elaborated.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
I. A. Kipenko, A. R. Akhmatkhanov, A. A. Esin, V. Ya Shur
Summary: Barkhausen pulses in ferroelectrics are sharp peaks in switching current during polarization reversal. In lithium niobate crystals, BPs play a dominant role during polarization reversal with up to 0.7 of the switched charge. Analyzing main merging events provides important information about domain kinetics, demonstrated through recording switching current and in situ domain imaging.
Article
Optics
Anne-Lise Viotti, Robert Lindberg, Andrius Zukauskas, Rimantas Budriunas, Dainius Kucinskas, Tomas Stanislauskas, Fredrik Laurell, Valdas Pasiskevicius
Article
Nanoscience & Nanotechnology
Sabine M. Neumayer, Anton V. Ievlev, Liam Collins, Rama Vasudevan, Mohammad A. Baghban, Olga Ovchinnikova, Stephen Jesse, Katia Gallo, Brian J. Rodriguez, Sergei V. Kalinin
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Nanoscience & Nanotechnology
Rusul M. Al-Shammari, Mohammad Amin Baghban, Nebras Al-attar, Aoife Gowen, Katia Gallo, James H. Rice, Brian J. Rodriguez
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Multidisciplinary Sciences
Ottavia Jedrkiewicz, Alessandra Gatti, Enrico Brambilla, Martin Levenius, Gintaras Tamosauskas, Katia Gallo
SCIENTIFIC REPORTS
(2018)
Article
Optics
Cristine C. Kores, Patrick Mutter, Hoda Kianirad, Carlota Canalias, Fredrik Laurell
Article
Optics
Jingyi Tian, Fredrik Laurell, Valdas Pasiskevicius, Min Qiu, Hoon Jang
Article
Physics, Applied
Hoda Kianirad, Gustav Lindgren, Alexandra Pena, Andrius Zukauskas, Bertrand Menaert, Fredrik Laurell, Benoit Boulanger, Carlota Canalias
APPLIED PHYSICS LETTERS
(2019)
Article
Engineering, Electrical & Electronic
Cristine Calil Kores, Nur Ismail, Edward H. Bernhardi, Fredrik Laurell, Markus Pollnau
IEEE PHOTONICS JOURNAL
(2019)
Article
Physics, Applied
Stephan Steinhauer, Lily Yang, Samuel Gyger, Thomas Lettner, Carlos Errando-Herranz, Klaus D. Jons, Mohammad Amin Baghban, Katia Gallo, Julien Zichi, Val Zwiller
APPLIED PHYSICS LETTERS
(2020)
Article
Optics
Nicklas Bjarnhall Prytz, Daniel Qvarngard, Antti Harkonen, Mircea Guina, Katia Gallo
Article
Chemistry, Multidisciplinary
Pedro Soubelet, Julian Klein, Jakob Wierzbowski, Riccardo Silvioli, Florian Sigger, Andreas Stier, Katia Gallo, Jonathan J. Finley
Summary: This study investigates the optical properties of monolayer thick MoSe2 straddling domain wall boundaries in LiNbO3, revealing the presence of extremely large in-plane electric fields at the interface and their effects on excitons, leading to dissociation and routing of free charges and trions. The observed spatial luminescence modulation is explained using realistic material parameters through drift-diffusion and continuity equations modeling, showing excellent qualitative agreement with experimental observations.
Article
Nanoscience & Nanotechnology
Alessandro Prencipe, Mohammad Amin Baghban, Katia Gallo
Summary: Phase-shifted Bragg grating filters implemented in thin film lithium niobate demonstrate narrowband operation at telecom wavelengths with high extinction ratios. By leveraging the strong electro-optic effect in lithium niobate, combined with tight light confinement of nanophotonic wires and optimized grating structures, electric tunability in peak wavelength and transmission is achieved. These results pave the way for reconfigurable narrowband photonic filters with a small footprint and low consumption, suitable for on-chip quantum and nonlinear optics, optical sensing, and microwave photonics.
Article
Chemistry, Multidisciplinary
Maryam Sanaee, Elin Sandberg, K. Goran Ronquist, Jane M. Morrell, Jerker Widengren, Katia Gallo
Summary: Exosomes and exosome-like nanovesicles have the potential to serve as drug delivery carriers due to their targeting functionality and low immunogenicity. However, accurate methods to load them and characterize their contents are challenging due to their small size, polydispersity, and aggregation in solution. In this study, a methodology based on burst analysis of dual-color confocal fluorescence microscopy experiments is developed to quantitatively characterize these nanovesicles and their fluorescently-labeled cargo. Successful loading of nanovesicles derived from animal extracellular vesicles and human red blood cell detergent-resistant membranes is demonstrated, and size statistics and loading yields are quantified using dual-color coincident fluorescence burst analysis.
Article
Chemistry, Multidisciplinary
Alessandro Prencipe, Samuel Gyger, Mohammad Amin Baghban, Julien Zichi, Katharina D. Zeuner, Thomas Lettner, Lucas Schweickert, Stephan Steinhauer, Ali W. Elshaari, Katia Gallo, Val Zwiller
Summary: This study reports on the implementation of superconducting nanowire single-photon detectors on thin film lithium niobate ridge nano-waveguides, which shows great potential for on-chip quantum optics experiments.
Article
Chemistry, Multidisciplinary
Rusul M. Al-Shammari, Nebras Al-Attar, Michele Manzo, Katia Gallo, Brian J. Rodriguez, James H. Rice
