Article
Physics, Multidisciplinary
Y. S. Lin, S. Y. Wang, X. Zhang, Y. Feng, Y. P. Pan, H. Ru, J. J. Zhu, B. K. Xiang, K. Liu, C. L. Zheng, L. Y. Wei, M. X. Wang, Z. K. Liu, L. Chen, K. Jiang, Y. F. Guo, Ziqiang Wang, Y. H. Wang
Summary: Vortices are topological defects that can appear in type-II superconductors even in the absence of an external magnetic field. In this study, the researchers used scanning superconducting quantum interference device microscopy to search for quantum anomalous vortices in an iron-chalcogenide superconductor. They found a stochastic distribution of isolated anomalous vortices and antivortices, and observed hysteretic flipping and vectorial rotation of these vortices with the application of a small local magnetic field. These unique properties satisfy the defining criteria of quantum anomalous vortices, suggesting an emergent quantum phase in the superconductor with nontrivial topological band structure.
Article
Chemistry, Multidisciplinary
Robert G. Moore, Qiangsheng Lu, Hoyeon Jeon, Xiong Yao, Tyler Smith, Yun-Yi Pai, Michael Chilcote, Hu Miao, Satoshi Okamoto, An-Ping Li, Seongshik Oh, Matthew Brahlek
Summary: The interface between 2D topological Dirac states and an s-wave superconductor has the potential to support Majorana-bound states for quantum computing. The researchers demonstrate that the Fe(Te,Se)/Bi2Te3 system is highly tunable and can be used to realize Majorana-bound states with improved characteristics important for their applications. By reducing doping and improving spin-momentum locking, the desired spin-momentum-locked topological interface states (TIS) can be achieved.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Xianxin Wu, Xin Liu, Ronny Thomale, Chao-Xing Liu
Summary: In this research, we propose to create Majorana zero modes (MZMs) without heterostructures in the FeTe1-xSex monolayer by applying an in-plane magnetic field and tuning the local chemical potential via electric gating. Our study not only reveals the FeTe1-xSex monolayer as a promising Majorana platform with scalability and electrical tunability, but also provides a general principle to search for realistic realization of high-order topological superconductivity.
NATIONAL SCIENCE REVIEW
(2022)
Article
Chemistry, Multidisciplinary
Xiong Yao, Alessandro R. Mazza, Myung-Geun Han, Hee Taek Yi, Deepti Jain, Matthew Brahlek, Seongshik Oh
Summary: Epitaxial Fe(Te,Se) thin films have been successfully grown on a sixfold antiferromagnetic insulator, MnTe, exhibiting superconductivity with a clear transition around 11 K. The lattice match between Fe(Te,Se) and MnTe allows a hybrid symmetry epitaxy mode, and the Te/Fe flux ratio during deposition is critical for the superconductivity. This discovery opens up new possibilities for combining topological superconductivity with the rich physics of the MnTe-Bi2Te3 family.
Article
Chemistry, Multidisciplinary
Xiong Yao, Matthew Brahlek, Hee Taek Yi, Deepti Jain, Alessandro R. Mazza, Myung-Geun Han, Seongshik Oh
Summary: This study demonstrates a new method for growing a 4-fold compound superconductor on a 6-fold topological insulator, known as hybrid symmetry epitaxy, critical for stabilizing robust superconductivity.
Article
Multidisciplinary Sciences
Mario Scuderi, Ilaria Pallecchi, Antonio Leo, Angela Nigro, Gaia Grimaldi, Carlo Ferdeghini, Corrado Spinella, Marco Guidolin, Antonio Trotta, Valeria Braccini
Summary: The development of superconducting materials for large scale applications focuses on optimizing flux pinning and current carrying capability. By combining high resolution imaging with transport measurements, various microstructural defects in Fe(Se,Te) thin films have been identified to affect pinning properties, establishing correlations between observed features and pinning behaviors.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Da Jiang, Yinping Pan, Shiyuan Wang, Yishi Lin, Connor M. Holland, John R. Kirtley, Xianhui Chen, Jun Zhao, Lei Chen, Shaoyu Yin, Yihua Wang
Summary: The researchers used scanning superconducting quantum interference device microscopy to explore the superfluid density and supercurrent distribution in the iron-chalcogenide high temperature superconductor Fe(Se,Te) (FST), finding that the bulk superconductivity in FST with 10% interstitial Fe was significantly suppressed while the edge still displayed strong superconducting diamagnetism. The temperature dependences of the superfluid density and supercurrent distribution were distinctively different between the edge and the bulk, and magnetic dopants were found to stabilize anti-ferromagnetic spin correlation along the edge, potentially contributing to its robust superconductivity.
Article
Chemistry, Multidisciplinary
Susumu Fujii, Shenghan Gao, Cedric Tassel, Tong Zhu, Thibault Broux, Koji Okada, Yuto Miyahara, Akihide Kuwabara, Hiroshi Kageyama
Summary: The role of anions in antiperovskites was investigated through theoretical and experimental studies, revealing that replacing polarizable H- anions with ionic F- anions in the M(3)FCh family does not slow down ion diffusion. It was found that the low-frequency rotational modes of the octahedron in cubic M(3)FCh facilitate fast ionic diffusion, showing a correlation between tolerance factor and ionic transport. The cubic iodine-doped Li3FSe exhibited a room-temperature ionic conductivity of 5 x 10(-5) S/cm with a bulk activation energy of 0.18 eV.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Phillip Dang, Guru Khalsa, Celesta S. Chang, D. Scott Katzer, Neeraj Nepal, Brian P. Downey, Virginia D. Wheeler, Alexey Sus, Andy Xie, Edward Beam, Yu Cao, Cathy Lee, David A. Muller, Huili Grace Xing, David J. Meyer, Debdeep Jena
Summary: Researchers have successfully observed the integer quantum Hall effect in a two-dimensional electron gas by combining high critical temperature nitride superconductors with nitride semiconductor heterostructures of metal polarity.
Article
Physics, Multidisciplinary
He Zhao, Hong Li, Lianyang Dong, Binjie Xu, John Schneeloch, Ruidan Zhong, Minghu Fang, Genda Gu, John Harter, Stephen D. Wilson, Ziqiang Wang, Ilija Zeljkovic
Summary: The study investigates the electronic nematic transition in FeTe1-xSex using spectroscopic-imaging scanning tunnelling microscopy, revealing nanoscale electronic nematicity near the critical Se composition. It also demonstrates the impact of anisotropic strain on superconductivity in this regime, showing the tendency of FeTe1-xSex to form puddles hosting static nematic order near x approximately 0.45.
Article
Chemistry, Physical
Armando Galluzzi, Krastyo Buchkov, Vihren Tomov, Elena Nazarova, Antonio Leo, Gaia Grimaldi, Massimiliano Polichetti
Summary: The magnetization of an Fe(Se, Te) single crystal was measured as a function of temperature and dc magnetic field, revealing the sample's critical temperature and magnetic background. Analysis of the superconducting hysteresis loops showed the presence of a second magnetization peak phenomenon. Investigation of different pinning centers in the sample indicated the existence of collective pinning theory, with calculations of pinning force density performed to evaluate the sample's potential for high-current and high-power applications.
Article
Chemistry, Physical
Dylan Bardgett, Renae N. Gannon, Danielle M. Hamann, Dennice M. Roberts, Sage R. Bauers, Ping Lu, David C. Johnson
Summary: The study investigated the phase formation sequence and crystal growth of binary Fe-Se compounds through preparing a series of Fe-Se ultrathin diffusion couples. It was found that the phase formation sequence at higher temperatures is governed by Se loss in the annealing process, consistent with what would be expected from the phase diagram. Additionally, films rich in Fe were crystallized during deposition providing a means to crystallographically aligned, iron-rich beta-FeSe for future research.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yu Li, Dingyu Shen, Andreas Kreisel, Cheng Chen, Tianheng Wei, Xiaotong Xu, Jian Wang
Summary: In this study, we measured the quasiparticle interference in monolayer Fe(Se,Te)/SrTiO3(001) and observed the anisotropic structure of the large superconducting gap and the sign change of the superconducting gap on different electron pockets. The results are consistent with the bonding-antibonding s +/--wave pairing symmetry driven by spin fluctuations in conjunction with spin-orbit coupling.
Article
Nanoscience & Nanotechnology
Yee Hui Robin Chang, Junke Jiang, Heng Yen Khong, Ismail Saad, Soo See Chai, Mohd Muzamir Mahat, Shuxia Tao
Summary: Transition metal chalcogenides have gained attention for their renewable energy conversion capability, but the mechanical flexibility of most existing TMCs limits their practical applications. This study utilized evolutionary algorithms and ab initio calculations to identify stable, ductile phases of AgxSe1-x and AgxTe1-x compounds, revealing new monolayer structures with potential in optoelectronics. The findings suggest strong stability and high conversion efficiency, with strategies to enhance power factor and thermoelectric properties, indicating potential for hybrid photovoltaic and thermoelectric devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Fariba Moshtaghi, Mardali Yousefpour, Ali Habibolahzadeh
Summary: Polyaniline-Bi-Sb-Te-Se thin films were fabricated on aluminum substrate using electrodeposition and electrochemical reaction method. The structure and morphology of the films were analyzed by FTIR, XRD, FE-SEM, and EDS. The electrical and thermoelectric properties of the films were evaluated, and it was found that the chemical composition and applied potential greatly influenced the thermoelectric properties. Furthermore, a slight change in the chemical compound improved the thermoelectric properties by approximately 65%.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Kazuhiro Kajikawa, Yuna Fujiwara, Miyabi Miezaki, Satoshi Awaji, Arnaud Badel, Kohki Takahashi, Tatsunori Okada, Toru Abe, Shinji Fujita, Shogo Muto, Koki Tsuchiya, Yasuhiro Iijima, Masanori Daibo
Summary: This study experimentally evaluates AC losses in a high temperature superconducting (HTS) coil. Double-pancake (DP) coils are wound using rare-earth-based coated conductors without insulation to improve thermal stability. The contact resistances between the DP coils are observed in DC operations before measuring the AC losses. The total losses, including Joule losses in the joints between the DP coils, are measured by integrating the resistive components extracted from the terminal voltages in the HTS coil and the applied transport currents observed using a pickup coil.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
Daichi Kobayashi, Tatsunori Okada, Satoshi Awaji
Summary: This study investigated the temperature, magnetic field, and angular dependence of the critical current density, J(c)(T, B, theta), of (Bi, Pb)(2)Sr2Ca2Cu3Oy (Bi2223) core composed of commercial Bi2223 tapes. The researchers found that the flux pinning curves exhibited a temperature-scaling relation at high temperature but not at low temperature. Additionally, a broad peak in J(c)(theta) was observed in a specific direction, which was attributed to the intrinsic pinning caused by a c-axis misalignment. By considering the c-axis misalignment, the researchers were able to accurately reproduce the J(c)(T, B, theta) behavior. These findings contribute to a better understanding of the characteristics of J(c)(T, B, theta) and can be explained by a model that considers the temperature-scaling law, c-axis misalignment, and intrinsic pinning.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
Shintaro Adachi, Ataru Ichinose, Fumiko Kimura, Shigeru Horii
Summary: This study examined the twinned microstructures of a magnetically biaxial aligned grain of DyBa2Cu3Oy using transmission electron microscopy (TEM). Planar views of the grain were obtained more easily through the use of biaxial aligned grain. The study revealed an inhomogeneous abundance ratio of two different types of domains, which suggested the presence of triaxial magnetic anisotropy at the grain level and its contribution to the biaxial alignment of RE123 grains under MRFs.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Physics, Applied
Tomoya Horide, Hiromu Katagiri, Ataru Ichinose, Kaname Matsumoto
Summary: The incorporation of different materials can control the phase formation and nanostructure of Fe(Te,Se) films, thus affecting their superconducting properties. Adding SrTiO3 to the films resulted in c-axis oriented structures and the formation of nanocomposite structures with increasing SrTiO3 content.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Mitsuhiro Muta, Suguru Nishikawa, Ataru Ichinose, Yukio Sato, Makoto Arita, Yoshifumi Ikoma, Masashi Mukaida
Summary: Preferred orientation and optical responses were investigated for BaBiO3 films grown by pulsed laser deposition. The films exhibited monoclinic symmetry I2/m and a (110) preferred orientation. The estimated optical bandgaps were around 2.3 eV for direct transition and 2.1 eV for indirect transition. The decay time of photoconductivity was found to be approximately 0.48 sec. The relationship between ultraviolet light-induced photoconductivity and film crystallinity was clarified, with high-quality crystalline BaBiO3 films exhibiting lower photoconductivity, contrary to TiO2 films.
Article
Engineering, Electrical & Electronic
K. Takahashi, A. Badel, T. Okada, S. Awaji, H. Miyazaki, S. Hanai, S. Ioka
Summary: This article describes the plan to upgrade the 25T cryogen-free superconducting magnet to a 30T magnet at the High Field Laboratory for Superconducting Materials, Tohoku University. A robust coil concept with REBCO coils was adopted and tested for its effectiveness through stress tests and performance evaluation.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
T. Abe, A. Badel, T. Okada, S. Awaji, F. Fujita, T. Koki, Y. Iijima, M. Daibo
Summary: REBa2Cu3O7-delta (RE: rare earth/Y) coated conductors have good critical current characteristics under high magnetic fields. However, performance inhomogeneity along their length may cause damaging hotspots. One possible solution is the use of the two-tape bundle co-winding method for current redistribution in case of local defects.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
Yutaro Doi, Ryo Teranishi, Tomohiro Miyajima, Akiyoshi Matsumoto, Valery Petrykin, Sergey Lee, Tatsunori Okada, Satoshi Awaji
Summary: This study investigates the effect of heat-treatment temperature and precursor film thickness on the crystallinity and joint rate of GdBCO coated conductors. The results show that heat treatment at around 800 degrees C with a thicker precursor film improves the crystallization of GdBCO and leads to a higher joint rate.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Physics, Applied
Tatsunori Okada, Daichi Kobayashi, Kohei Sakai, Satoshi Awaji, Masashi Kikuchi, Takeshi Kato
Summary: We investigated the stress-strain relation and the applied strain dependence of the critical current I-c(epsilon(app)) of high-strength Bi2Sr2Ca2Cu3O10+delta (Bi2223) R&D tapes reinforced by similar to 100 mu m thick Ni-based alloy sheets with various pre-tensions F-pre applied during the lamination process. We confirmed that the thickening of Ni-alloy laminations is useful for enhancing Young's modulus compared with commercial tapes (similar or equal to 30 mu m thick laminations). I-c(epsilon(app)) decreases gradually and reversibly with applied strains epsilon(app) and then degrades irreversibly with larger tensile and compressive strains. The reversible strain regime tends to shift toward the tensile side with larger F-pre, indicating that application of large Fpre is effective in improving the reversible tensile strain limit. The observed I-c(epsilon(app)) can be reproduced well by model considering epsilon(app)-linear critical current density, cross-sectional strain distribution, and Weibull-type distribution of filament damage. We clarified that different irreversible I-c(epsilon(app)) degradations with large tensile and compressive strains can be understood by differences in the dimensions and number of cracks and ruptures (tensile strains) and bucklings (compressive strains).
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Tomoya Horide, Ataru Ichinose, Masashi Tanaka, Kaname Matsumoto
Summary: The control of nanostructure is crucial in both fundamental and technological aspects, as it determines various properties of superconductors such as vortex pinning. Although the nanostructure control in superconducting oxides is well-established, it remains challenging in iron-based superconductors due to the possibility of anionic substitution and non-stoichiometric anion. In this study, compositional inhomogeneity originating from phase separation was observed in Fe(Te,Se) films prepared through pulsed laser deposition. The compositional inhomogeneity was absent in films deposited at lower temperature, while high-temperature deposited films showed an anion distribution with the size of about 8 nm due to phase separation. The obtained structure is expected to function as an effective pinning center in high magnetic fields after further optimization, demonstrating a novel method of nanostructure control in Fe(Te,Se) different from nanocomposite formation in oxides.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Junyi Luo, Tatsunori Okada, Satoshi Awaji, Cong Liu, Yanwei Ma
Summary: We investigated the magnetic and angular dependence of the critical current Ic(B, theta) in Ba1-xKxFe2As2 (Ba122) tapes with 7 filaments sheathed in Cu/Ag. The results showed hysteresis behaviors of Ic(B, theta) below 8T, which depended on the direction of B and the rotation of theta. Analysis revealed that Ic(up)(B) displayed a non-monotonic dependence on B, which could be explained by flux pinning. Calculations based on a spherical pin model successfully reproduced the measured Ic(B > 8T, theta) and I-c(avg)(B, theta). This suggests that controlling spherical pins may improve the characteristics of Ic(T, B, theta) in Cu/Ag-sheathed Ba122 tapes.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
A. Badel, K. Takahashi, A. Zampa, T. Okada, G. Nishijima, T. Uto, H. Takewa, S. Hanai, S. Ioka, J. Inagaki, S. Awaji
Summary: In this article, we propose a robust REBCO HTS insert coil concept for upgrading a superconducting magnet. The concept includes a two-tape bundle to mitigate tape degradation risks and edge impregnation for enhanced mechanical stiffness and conduction-cooling capability. A dump resistor is used for thermal runaway protection, with an early detection concept. The concept has been successfully tested on small scale prototypes and implemented on a large-size insert coil.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
Tatsuhiko Yoshihara, Genki Honda, Tatsuoki Nagaishi, Shinichi Kobayashi, Kiyoshi Kanie, Tatsunori Okada, Satoshi Awaji
Summary: REBCO films with BaMO3 artificial pinning centers were fabricated using a low-cost fluorine-free metal organic decomposition (FF-MOD) method. The size of BMO formation can be maintained on the nanometer order by adding preformed BMO nanoparticles, acting as effective pinning centers at low temperatures and magnetic fields. A polycrystallization sintering process enables the formation of polycrystalline REBCO films prior to REBCO orientation. By utilizing preformed BMO nanoparticles and a polycrystallization sintering process, BMO doped GdBCO over 100 m-long tapes with a thickness of more than 3 μm can be achieved, which is the first report of 120-meter-long artificial pinned REBCO tapes with I-c exceeding 200 A/4 mm width at 77 K, self-field made by the FF-MOD method.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
K. Takahashi, A. Badel, A. Zampa, T. Okada, S. Awaji, G. Nishijima, T. Uto, H. Takewa, S. Hanai, S. Ioka, J. Inagaki
Summary: For the next generation of high field cryogen-free superconducting user magnets, a robust coil concept is adopted, with two tapes co-wound in a face-to-back configuration, a fluorine-coated polyimide tape as the inter-bundle insulation, and thin FRP plates glued on the coil edges. The electromagnetic and current-voltage properties of 20-stacked REBCO pancake coils wound with Fujikura EuBCO tapes using the robust coil concept were investigated under a background field of 14 T and at a temperature of 4.2 K. The coil structure showed no anomalous behavior up to 25 T, indicating its advantage against large electromagnetic stress.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Physics, Applied
Wenjie Li, Sunseng Pyon, Akiyoshi Yagi, Cheng Yu, Ryosuke Sakagami, Ataru Ichinose, Satoru Okayasu, Tsuyoshi Tamegai
Summary: Various peak effects induced by particle irradiations were investigated in 2H-NbSe2 single crystals. The peak effect induced by order-disorder transition of vortices was magnified by 3 MeV proton irradiation, while the peak effect in NbSe2 with splayed columnar defects showed a shift towards low fields with increasing splayed angle. Numerical calculations confirmed the mechanism behind the peak effect, and field dependence analysis revealed the formation of non-uniform J(c) flow. Coexistence of different peak effects was observed in symmetric splayed CD samples generated by Xe and Au ions, and a broad anomalous peak effect similar to iron-based superconductors was observed in Au-irradiated samples with small splay angle, which was suppressed by an externally applied magnetic field parallel to one of the splayed CDs.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)
