Article
Engineering, Electrical & Electronic
Cenqin Jin, Nikita A. Shevchenko, Zhe Li, Sergei Popov, Yunfei Chen, Tianhua Xu
Summary: The paper investigates the impact of Equalization Enhanced Phase Noise (EEPN) on multi-channel optical communication systems, analyzes the nonlinear interaction between the signal and EEPN, and validates the analytical approach through numerical simulations and split-step Fourier simulations.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Applied
Bingxue Hu, Da-Wen Sun, Hongbin Pu, Zhibin Huang
Summary: A large-area, high-sensitivity, stable and uniform Au@Ag nanorods-CMC substrate was successfully developed for SERS detection of pesticide residues in fruits. The substrate retained more than 80% SERS performance after 9 months of storage, demonstrating its advantages of facile preparation, good uniformity, strong reproducibility, and long-term stability.
Article
Environmental Sciences
Josy A. Osajima, Alexandro S. Sa, Luzia M. C. Honorio, Pollyana Trigueiro, Lucas I. F. Pinto, Joziel A. Oliveira, Marcelo B. Furtini, Roosevelt D. S. Bezerra, Ana C. S. Alcantara, Edson C. Silva-Filho
Summary: This study investigated the synergistic effect of silver and gold bimetallic nanoparticles deposited on palygorskite in the presence of TiO2 for efficient photodegradation of bentazone herbicide. The best photodegradation system was found to be Au@Ag-Pal+TiO2, which showed continued effectiveness after the third cycle. The photodegradation process of bentazone exhibited toxicity against Artemia salina.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Juntao Zhang, Yaozhi Huang, Wei Liu, Lvqin Xie, Benmei Wei, Chengzhi Xu, Yuling Xu, Mingming Zheng, Haibo Wang
Summary: Trehalose has a promoting effect on the self-assembly and conformational stability of collagen, without affecting the microstructure of collagen fibrils. It also increases the thermal stability of collagen and has no effect on the cytocompatibility of collagen materials.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Lu Dai, Zhiran Wang, Yufeng Huo, Yuling Huang, Guiwen Wang, Lizhu Fan, Peng Chen, Guang Han, Xu Lu, Bin Zhang, Xiaoyuan Zhou, Guoyu Wang
Summary: The high-temperature disordered phase of Cu3SbSe3 can be extended to lower temperatures by alloying with Ag, which effectively suppresses the lattice thermal conductivity and increases the Seebeck coefficient at high temperatures. Ag-alloying has a significant impact on the thermal and electrical properties of Cu3SbSe3.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Yanqiang Li, Xuan Liu, Sensen Xue, Anmin Liu, Shizheng Wen, Siru Chen
Summary: Designing electrocatalysts with strong metal-support interaction can enhance their catalytic performance. In this work, heteroatoms doped carbon with CoPt alloy and isolated Co single atoms (CoPt-CoSA@NSC) were synthesized using a CoPt bimetallic metal-organic framework as a precursor. The presence of CoSA on the carbon substrate promotes electron transfer between CoPt and the support, leading to improved catalytic activity and stability. CoPt-CoSA@NSC also shows great potential as a cathode electrocatalyst for Zn-air battery.
Article
Materials Science, Multidisciplinary
Mengyuan Zhu, Yi Wang, Yanfei Wu, Jialong Liu, Jingyan Zhang, He Huang, Xinqi Zheng, Jianxin Shen, Ruijie Zhao, Wenda Zhou, Shouguo Wang
Summary: The study investigates the effect of magnetic fields and thermal fields on methanol oxidation reactions in magnetic nanoparticles, showing that magnetic fields can significantly enhance catalytic performance, while thermal fields also have an impact on the reaction. First-principle calculations indicate that magnetic fields can facilitate the dehydrogenation of methanol and water.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Optics
S. Palmer, A. Boes, G. Ren, T. G. Nguyen, S. J. Tempone-Wiltshire, N. Longhurst, P. M. Farrell, A. Steiner, Ch. D. Marciniak, T. Monz, A. Mitchell, R. E. Scholten
Summary: We introduce a novel approach to achieve high bandwidth laser frequency modulation using a lithium niobate chip as an intracavity electro-optic modulator. The integration of the modulator with the cateye output coupler provides a unique solution for high bandwidth frequency stabilization and linewidth narrowing.
Article
Chemistry, Physical
Xiaolong Zhang, Lei Chen, Yang Liu, Qian Duan
Summary: Composite nanostructure materials, such as rGO/CoPt/Ag, demonstrate improved catalytic performance due to their unique structural advantages and synergistic effects among components. The rGO/CoPt/Ag nanocomposite exhibits a higher kinetic rate constant for 4-nitrophenol reduction compared to CoPt nanoparticles and rGO/CoPt, making it a promising catalyst for various catalytic applications.
Article
Chemistry, Physical
Xuanchi Zhou, Haifan Li, Fanqi Meng, Wei Mao, Jiaou Wang, Yong Jiang, Katsuyuki Fukutani, Markus Wilde, Bunshi Fugetsu, Ichiro Sakata, Nuofu Chen, Jikun Chen
Summary: This study demonstrates the root cause of hydrogen-induced multiple electronic phase transitions by H-1 quantification using nuclear reaction analysis. Low hydrogenation temperature is crucial in achieving a large hydrogen concentration, while elevating the temperature surprisingly leads to the formation of more stable metallic states.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Optics
Ya Zhang, Chathura P. Bandutunga, Terry G. McRae, Malcolm B. Gray, Jong H. Chow
Summary: A passive, all-optical fiber frequency reference system is demonstrated using a digitally enhanced homodyne interferometric phase readout. The system achieves a frequency stability of 0.1 Hz/root Hz above 100 Hz, which is five times above the thermo-dynamic noise limit.
Article
Engineering, Environmental
Mengyue Zhang, Jun Dong, Minglu Sun, Chen Sun, Yujiao Han, Yanyang Mo, Weihong Zhang
Summary: This study focuses on elucidating the mechanism of manganese dioxide (MnO2) alleviation by phase transfer catalyst (PTC) and conducting experiments to evaluate the effectiveness. The results showed that PTC addition decreased the suspended MnO2 content and total manganese in the media. Additionally, PTC promoted the generation of dissolved Mn(II) and Mn(III), which benefited trichloroethylene degradation.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Physical
Yohanes Hutabalian, Sinn-wen Chen
Summary: This study investigates the phase equilibria information of the Ag-Se-Te ternary system, focusing on the reaction couples of Ag/Se, Ag2Te/Se, and Ag/Se-30at%Te at 350 degrees C. The results show no ternary compounds present and the formation of different phases in each reaction couple. The reaction paths and mass balances are well explained using the determined isothermal section of the system.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yongjun Ji, Xiaoli Chen, Shaomian Liu, Shaojia Song, Wenqing Xu, Ruihuan Jiang, Wenxing Chen, Huifang Li, Tingyu Zhu, Zhenxing Li, Ziyi Zhong, Dingsheng Wang, Guangwen Xu, Fabing Su
Summary: Developing efficient catalysts for CO-SCR is crucial for commercializing this technology. This study demonstrates that atomically dispersed Ag supported on ordered mesoporous WO3 can serve as a highly active catalyst for CO-SCR. By altering the amount of the Ag precursor, the local environment of the Ag atom coordinated with the O atom can be tailored.
Article
Materials Science, Multidisciplinary
Rui Wang, Congzheng Ji, Liangjun Lu, Linjie Zhou, Fengang Zheng
Summary: The PCM Ge2Sb2Se4Te1 film doped by Ag (AGSST) was prepared using the PLD method, and its crystal structure, chemical bonding, and film complex refractive index were studied. AGSST underwent a phase transition after annealing. The crystalline AGSST exhibited a significantly lower extinction coefficient in the communication C-band (1550 nm), with a high figure of merit (FOM) of 7.48, surpassing that of undoped GSST. This outcome provides potential chalcogenide PCMs for the development of programmable nonvolatile photonics.
Article
Materials Science, Ceramics
S. A. Hussain, J. V. Vas, Rohit Medwal, Z. Zheng, Y. Wang, S. Handong, J. Y. Pae, V. M. Murukeshan, I. A. Khan, R. S. Rawat
CERAMICS INTERNATIONAL
(2020)
Article
Chemistry, Multidisciplinary
Kandammathe Valiyaveedu Sreekanth, Rohit Medwal, Chandreyee M. Das, Manoj Gupta, Mayank Mishra, Ken-Tye Yong, Rajdeep Singh Rawat, Ranjan Singh
Summary: In this experiment, tunable plasmonic resonances at visible wavelengths were achieved using the chalcogenide semiconductor alloy Sb2Te3, showing different properties of plasmonic resonances based on different nanostructures in this material. Electrically tunable Sb2Te3-based plasmonic devices could potentially be applied in the development of active color filters.
Review
Chemistry, Multidisciplinary
Elizaveta Tyukalova, Joseph Vimal Vas, Reinis Ignatans, Aaron David Mueller, Rohit Medwal, Masaaki Imamura, Hironori Asada, Yasuhiro Fukuma, Rajdeep Singh Rawat, Vasiliki Tileli, Martial Duchamp
Summary: This article discusses the challenges and potential applications of using transmission electron microscopy (TEM) imaging and spectroscopy at low temperatures. The study shows the potential for atomic-resolution imaging at cryogenic temperatures to be generalized to most Li-based materials. Furthermore, real-time TEM imaging in a continuous and variable temperature range has shown promise for studying the evolution of ferroelectric and ferromagnetic domain walls.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Physics, Condensed Matter
R. Maruthi, Sayandeep Ghosh, Mohindar S. Seehra, Deep C. Joshi, Mouli R. Chowdhury, Rohit Medwal, Rajdeep S. Rawat, Bruno Weise, Subhash Thota
Summary: This study presents the magnetic field-temperature phase diagram, exchange constants, and magnetic ground state of antiferromagnetic MnNb2O6 polycrystals. Experimental data agrees with theoretical analysis, providing values for the Neel temperature, critical exponent, magnetic moment, and exchange constants. The study also maps out the H-T phase diagram and estimates the anisotropy energy of the material.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Nanoscience & Nanotechnology
John Rex Mohan, Rohit Medwal, Surbhi Gupta, Kriti Gogia, Joseph Vimal Vas, Rekha Gupta, Angshuman Deka, Rajdeep Singh Rawat, Annapoorni Subramanian, Yasuhiro Fukuma
Summary: The study shows that nonstoichiometric Fe60Pt40 nanoclusters with Pt buffer layer can maintain the hard magnetic phase at high temperatures, providing high perpendicular anisotropy suitable for HDMR technology.
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Applied
Rohit Medwal, Angshuman Deka, Joseph Vimal Vas, Martial Duchamp, Hironori Asada, Surbhi Gupta, Yasuhiro Fukuma, Rajdeep Singh Rawat
Summary: This research demonstrates the growth-induced magneto-crystalline anisotropy in 40 nm epitaxial YIG thin films, enabling directional control over the generation and propagation of magnons. Ferromagnetic resonance measurements reveal the presence of cubic and non-cubic anisotropy in epitaxial YIG thin films.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Condensed Matter
R. K. Dokala, S. Das, B. Weise, R. Medwal, R. S. Rawat, S. Thota
Summary: In this study, a systematic investigation of the magnetic phase diagram, negative magnetization, exchange interactions, and field-induced spin-flop transitions in the distorted perovskite Y1-xCexCrO3 was conducted, revealing the unique characteristics of the Ce-incorporated system.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Condensed Matter
R. Maruthi, Mohindar S. Seehra, Sayandeep Ghosh, Rohit Medwal, Rajdeep S. Rawat, Bruno Weise, Eun Sang Choi, Subhash Thota
Summary: By analyzing the temperature and magnetic field dependence of magnetization in MnTa2O6, the magnetic field-temperature phase diagram, tricritical point, and exchange constants were determined. Experimental results were consistent with theoretical predictions and previous studies, confirming the phase purity of the material.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Chemistry, Multidisciplinary
Kandammathe Valiyaveedu Sreekanth, Rohit Medwal, Yogesh Kumar Srivastava, Manukumara Manjappa, Rajdeep Singh Rawat, Ranjan Singh
Summary: The study demonstrates dynamic color generation using electrically tunable thin film optical coatings consisting of two different phase change materials. These coatings excite Fano resonance through structural phase switching, covering the entire visible spectrum and showing wide applications in tunable displays and active nanophotonic devices.
Article
Nanoscience & Nanotechnology
S. Das, S. Ghosh, R. G. Tanguturi, R. Medwal, S. Gupta, R. K. Dokala, R. S. Rawat, S. Das, S. Thota
Summary: By controlling the layer stacking sequence and degree of strain, we can achieve magnetic coupling across interfaces in ferromagnetic bilayers, offering a constructive approach for exploring novel electronic devices.
Article
Physics, Applied
Piyush Agarwal, Yingshu Yang, James Lourembam, Rohit Medwal, Marco Battiato, Ranjan Singh
Summary: A ferromagnetic metal is composed of localized electrons and conduction electrons that are coupled through strong exchange interaction. Non-equilibrium photoexcitation of the ferromagnetic thin films generates a transient spin current, which can be converted into a pulsed charge current and terahertz emission in the presence of a neighboring heavy metal layer. The proposed terahertz spintronic magnetometry tool allows reliable in-plane magnetization detection of ferromagnetic thin films and has technological importance in their characterization.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Condensed Matter
S. Das, R. K. Dokala, B. Weise, R. Medwal, R. S. Rawat, P. K. Mishra, S. Thota
Summary: A study on the crystal structure, magnetic characteristics, and phonon instabilities of Dy1-xCexCrO3 solid-solutions reveals the significant influence of Ce doping on the crystal structure and magnetism.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Applied
Sourabh Manna, Rohit Medwal, Surbhi Gupta, John Rex Mohan, Yasuhiro Fukuma, Rajdeep Singh Rawat
Summary: Ferromagnet/nonmagnet (FM/NM) bilayer-based spin Hall nano-oscillators (SHNOs) have potential for low-power physical reservoir computing systems. However, most studies require an external biasing magnetic field, limiting their practical implementation. This study demonstrates biasing field-free operation of a FM/NM bilayer-based SHNO using magnetic anisotropy control, which can significantly modify the auto-oscillation characteristics and reduce the threshold current for auto-oscillation.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Piyush Agarwal, Yingshu Yang, Rohit Medwal, Hironori Asada, Yasuhiro Fukuma, Marco Battiato, Ranjan Singh
Summary: Femtosecond laser-induced photoexcitation of ferromagnet/heavy metal heterostructures can emit broadband terahertz frequencies. The phenomenon is mainly attributed to the direct photoexcitation of the ferromagnet layer, but it is also influenced by a secondary excitation caused by hot electrons from the heavy metal layer.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
S. Thota, M. S. Seehra, M. R. Chowdhury, H. Singh, S. Ghosh, S. K. Jena, P. Pramanik, T. Sarkar, R. S. Rawat, R. Medwal, B. Weise
Summary: A study on the ferrimagnetic properties of Ni4Nb2O9 reveals that it is caused by two inequivalent Ni2+ ions with different magnetic moments. Experimental results and theoretical analysis of the temperature and magnetic field dependence of the magnetization, ac-magnetic susceptibility, and heat capacity provide new insights into the nature of the ferrimagnetism in Ni4Nb2O9.
