Article
Materials Science, Multidisciplinary
Evgeny A. Mashkovich, Kirill A. Grishunin, Anatoly K. Zvezdin, Thomas G. H. Blank, Alexander G. Zavyalov, Paul H. M. van Loosdrecht, Alexandra M. Kalashnikova, Alexey Kimel
Summary: The magnetization dynamics of bismuth-substituted yttrium iron-gallium garnet film were studied using terahertz pump-optical probe spectroscopy. Two magnetic modes were observed with frequencies intersecting at a magnetization compensation point. The dependence of these modes on terahertz pulse polarization, external magnetic field, and temperature were analyzed experimentally. Theoretical descriptions based on symmetry and the Lagrangian formalisms were proposed, explaining the crossing of magnetic modes.
Article
Materials Science, Ceramics
Shao-Ju Shih, Lewi Peter Richardo, Kevin Indrawan Sucipto, Zhi-Meng Wang
Summary: Ce-doped YAG phosphor particles were prepared using the spray drying method, with different acid catalysts affecting particle size, shape, and photoluminescence intensity. The crystallite size, influenced by the heat of combustion of the acid catalysts, was found to correlate with the photoluminescence intensity of the phosphors. Additionally, the precursor properties were discussed in relation to the formation mechanisms of the YAG: Ce powders.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Crystallography
Dmitry V. Bulyga, Diana A. Gavrilova, Sergey K. Evstropiev, Irina A. Arefina, Maxim K. Myagkih, Andrey A. Shelemanov
Summary: This study synthesized fine-dispersed YGdAG:Ce nanopowders with varying degrees of gadolinium substitution for yttrium, and investigated their structure and luminescent properties using various techniques. The results showed that YGdAG:Ce nanopowders with substitution of up to 60% gadolinium and nanocrystals with average sizes of 25-30 nm could be synthesized. The red-shift of cerium luminescence band was observed with increasing Gd content. The CIE diagram analysis suggested that 30-40% substitution of yttrium by gadolinium is optimal for fabricating a white light source based on LED with an emission wavelength of 470 nm.
Article
Chemistry, Multidisciplinary
Yevgeniy Sgibnev, Artem Shelaev, Dania Kulikova, Alexander Salatov, Peter Tananaev, Georgiy Yankovskii, Alexander Baryshev
Summary: This study demonstrated and compared the femtosecond laser crystallization of Bi/YIG films synthesized by metal-organic decomposition with conventional thermal annealing method. The specific Faraday rotation properties of the crystallized films were found to be similar between the two methods, with potential advantages of the laser approach in multilayered structures.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Materials Science, Ceramics
S. Kuznetsov, V. S. Sedov, A. K. Martyanov, S. Ch Batygov, D. S. Vakalov, S. S. Savin, V. A. Tarala
Summary: The study designed X-ray luminescent diamond composite films with embedded yttrium-aluminum nanoparticles and determined the stability limits of single-phase solid solutions in systems based on yttrium-aluminum and yttrium-scandium-aluminum garnets doped with cerium. The composition-optimized nanoparticles were embedded into a polycrystalline diamond matrix to form a diamond-YAG:Ce composite, showing intense X-ray luminescence from the Ce3+ ions.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Qifan Li, Henian Ni, Chuanjian Wu, Fangyuan Zhang, Xiaona Jiang, Lingfeng Li, Ke Sun, Zhongwen Lan, Ziyu Li, Zhong Yu
Summary: The electromagnetic properties of vacancy-engineered Gd3+-substituted garnet ferrites are reported. Cation vacancies on the dodecahedral sites of the garnet crystal structure are introduced by deficient Gd3+ substitution for the Y3+ ions. The vacancy-engineered samples exhibit improved densification, reduced FMR linewidth, and increased Curie temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Condensed Matter
A. Raja, P. M. Mohammed Gazzali, G. Chandrasekaran
Summary: The study successfully synthesized bismuth-substituted Y3-xBixFe5O12 (0 < x < 1.0) powders using sol-gel auto-combustion method, and systematically investigated their structural, morphological, electrical, and magnetic properties. Bismuth substitution significantly enhanced the magnetic and electrical properties of YIG, making it a potential candidate for microwave and magnetic-optical applications.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Nanoscience & Nanotechnology
Yuanjing Zhang, Qinghui Yang, Xiuting Liu, Ding Zhang, Yiheng Rao, Huaiwu Zhang
Summary: This study focuses on the PMA properties of rare-earth iron garnet thin films, specifically TmBiIG and YBiIG, revealing that TmBiIG films have better PMA and lower damping factor. As the thickness increases, PMA weakens, but remains significant for TmBiIG.
Article
Chemistry, Inorganic & Nuclear
Sergey V. Kuznetsov, Vadim S. Sedov, Artem K. Martyanov, Dmitrii S. Vakalov, Ludmila V. Tarala, Ivan A. Tiazhelov, Kirill N. Boldyrev
Summary: By preparing a concentration series of Y3Al5O12:Ce solid solutions, the composition with the highest X-ray luminescence intensity was identified. Luminescent diamond-Y3Al5O12:Ce composite films were synthesized using microwave plasma-assisted chemical vapor deposition (CVD) in methane-hydrogen gas mixtures based on the optimal composition. The luminescence intensity of the composite films could be fine-tuned by varying the amounts of embedded Y3Al5O12:Ce powders.
Article
Nanoscience & Nanotechnology
Seung Hwan Kim, Beomsu Park, Ji Woon Park, Seunghyun Oh, Kwanglim Oh, Han-Youl Ryu, Kyong Hon Kim
Summary: The optical and magneto-optic properties of praseodymium-doped bismuth-substituted yttrium iron garnet (Pr, Bi:YIG) films on fused silica glass substrates were studied using the metal-organic-decomposition (MOD) method. The maximum Faraday rotation angle of the Pr, Bi:YIG film was found to be 0.09 and 0.046 deg/mu m at the wavelengths of 1310 and 1550 nm, respectively, after annealing at 750 degrees C. Compared to the plain Bi:YIG film, the Pr, Bi:YIG film showed more than 50% improvement in Faraday rotation at the 1310 nm wavelength. The absorption coefficient of the Pr, Bi:YIG film was comparable to that of the Bi:YIG film. Therefore, the MOD-prepared Pr, Bi:YIG film has potential applications in magneto-optical devices such as optical isolators and circulators.
Article
Nanoscience & Nanotechnology
M. N. Smirnova, I. S. Glazkova, C. E. Nikiforova, M. A. Kop'eva, A. A. Eliseev, E. A. Gorbachev, V. A. Ketsko
Summary: Nanocrystalline Ce-substituted yttrium iron-gallium garnet Y2.5Ce0.5(Fe0.5Ga0.5)(5)O-12 was obtained through a metal-organic gel combustion method, followed by calcining at 700 degrees C in vacuum and additional heat treatment in air, which increased the sample's crystallinity. The element composition and phase purity were confirmed using X-ray fluorescence spectroscopy and X-ray powder diffraction, respectively, while Mossbauer spectroscopy on Fe-57 nuclei indicated the presence of only Fe3+ ions in the sample, indirectly suggesting the absence of tetravalent cerium impurity.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2021)
Article
Ophthalmology
Praveen Thokala, Aastha Singh, Vijay Kumar Singh, Varsha M. Rathi, Sayan Basu, Vivek Singh, Sheila MacNeil, Virender Singh Sangwan
Summary: The global uptake of simple limbal epithelial transplantation (SLET) was reported and compared with the economic, clinical, and social outcomes of cultured limbal epithelial transplantation (CLET). The anatomical success of SLET was similar to CLET for adults but better for children. Economic analysis showed that SLET provided cost-savings compared to CLET.
BRITISH JOURNAL OF OPHTHALMOLOGY
(2022)
Article
Ophthalmology
Pragnya R. Donthineni, Shobhit Varma, Abhinav Kethiri, Swapna Shanbhag, Dilip K. Mishra, Vivek Singh, Sayan Basu
Summary: This study describes the histopathological characteristics of limbal stem cell deficiency (LSCD) due to chronic vernal keratoconjunctivitis (VKC). Distinctive features such as epithelial downgrowth, eosinophilic infiltration, and epithelial solid and cystic implants were observed in the VKC group. The chronic inflammatory score was higher in VKC than in chemical burns (CB) group.
Review
Ophthalmology
Vivek Mahendrapratap Singh, Muralidhar Ramappa, Somasheila I. Murthy, Audrey Talley Rostov
Summary: This paper provides a broad overview of important considerations for toric intraocular lenses, including patient selection, biometry, understanding lens design and science, surgical techniques, and postoperative complication management.
INDIAN JOURNAL OF OPHTHALMOLOGY
(2022)
Review
Ophthalmology
Fatemeh Tavakkoli, Taher K. Eleiwa, Abdelrahman M. Elhusseiny, Mukesh Damala, Amit K. Rai, Kasra Cheraqpour, Mohammad H. Ansari, Mohammad Doroudian, Saeed H. Keshel, Mohammad Soleimani, Ali R. Djalilian, Virender S. Sangwan, Vivek Singh
Summary: The limbal stem cells niche is a microenvironment that provides and regulates the limbal epithelial stem cells. Disturbing this environment can lead to ocular surface aberrations. It is important to explore therapeutic strategies for restoring the functions of the limbal stem cells niche, especially due to the shortage of donor tissue for corneal transplantation.
EUROPEAN JOURNAL OF OPHTHALMOLOGY
(2023)
Review
Ophthalmology
Minal Thacker, Vivek Singh, Sayan Basu, Swati Singh
Summary: Dry eye disease (DED) is a common health problem that affects millions of people. Current treatments include eye drops and anti-inflammatory agents, but they have limitations. This review discusses the potential of biomaterials such as nanosystems, hydrogels, and contact lenses as drug delivery systems for DED. Animal studies have shown promising results, but human trials are still needed. Long-term studies evaluating their safety and effectiveness would help in their transition to clinical use.
EXPERIMENTAL EYE RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
W. A. S. Aldulaimi, M. B. Okatan, K. Sendur, M. C. Onbasli, I. B. Misirlioglu
Summary: The chirality reversal of vortex states in ferromagnetic nanodiscs can be achieved through pulsed electric fields, and the energetics of the reversal process are analyzed. The chirality reversal in the nanodiscs strongly depends on their thickness due to the anisotropy of demagnetizing fields. Chiral switching of magnetic moments in thin discs can lead to a transient vortex-antivortex lattice not observed in thicker discs.
Article
Cell Biology
Mukesh Damala, Abhishek Sahoo, Naveen Pakalapati, Vivek Singh, Sayan Basu
Summary: Corneal opacification or scarring is a major cause of blindness worldwide. Human limbus-derived stromal/mesenchymal stem cells (hLMSCs) have the potential to clear corneal scarring. The results of the study show that En+ and En- hLMSCs are not harmful to the recipient and potentially restore the transparency of debrided or scarred corneas, suggesting that hLMSCs could be clinically useful.
Article
Physics, Applied
Yuki Yoshihara, Kazushi Ishiyama, Toshiaki Watanabe, Pang Boey Lim, Mitsuteru Inoue, Caroline A. Ross, Taichi Goto
Summary: This study successfully achieved epitaxial growth of Ce:YIG on YAG and characterized its magnetic properties, optical response, and structural properties. This is of great significance for the integration of MO garnets and laser crystals.
APPLIED PHYSICS LETTERS
(2023)
Meeting Abstract
Ophthalmology
Madhuri Amulya Koduri, Deeksha Prasad, Abhinav Reddy Kethiri, Swapna S. Shanbhag, Sayan Basu, Vivek Singh
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2022)
Review
Ophthalmology
Mohd Salman, Anshuman Verma, Vijay Kumar Singh, Jilu Jaffet, Sunita Chaurasia, Deepak Kumar Sahel, Muralidhar Ramappa, Vivek Singh
Summary: Corneal dystrophies are genetic disorders that cause progressive corneal opacification and blindness. Gene therapy, including gene supplementation, gene silencing, and gene editing, shows potential as an alternative treatment for corneal dystrophies. However, there are limitations and challenges associated with CRISPR-based corneal treatment management.
ASIA-PACIFIC JOURNAL OF OPHTHALMOLOGY
(2022)
Article
Materials Science, Biomaterials
Deepak Kumar Sahel, Mohd Salman, Mohd Azhar, Sangam Giri Goswami, Vivek Singh, Manu Dalela, Sujata Mohanty, Anupama Mittal, Sivaprakash Ramalingam, Deepak Chitkara
Summary: In this study, cationic lipopolymeric nanoplexes were prepared and successfully used for intracellular delivery and localization of gene-editing endonucleases, showing good complexation efficiency and stability.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Meeting Abstract
Cell & Tissue Engineering
Falguni Pati, Shibu Chameettachal, Deeksha Prasad, Yash Parekh, Sayan Basu, Vivek Singh, Kiran Kumar Bokara
TISSUE ENGINEERING PART A
(2022)
Article
Physics, Multidisciplinary
Kamran Ullah, Emre Koese, Rawana Yagan, Mehmet C. Onbasli, Ozgur E. Mustecaplioglu
Summary: This study investigates steady state entanglement between two nitrogen-vacancy (NV) center defects in a diamond host on an ultrathin yttrium iron garnet (YIG) strip. The effects of dephasing and dissipative interactions between the qubits and spin waves in the YIG are studied, and it is shown that the magnon's dephasing effect can be eliminated. The entanglement dynamics of the qubits in a displaced thermal bath are analyzed, and the optimum parameters for achieving SSE are determined. In addition, the study explores the steady state coherence and explains the physical mechanism behind the delayed SSE.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Pathology
Dilip Kumar Mishra, Shikha Taneja, Vivek Singh, Uppala Veena, Swathi Kaliki
Summary: Based on histopathology, invasive squamous cell carcinoma is the most common form of OSSN in the Asian Indian population, with a higher prevalence in males and most commonly occurring in the age group of 41-60 years.
INDIAN JOURNAL OF PATHOLOGY AND MICROBIOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Arash Mousavi Cheghabouri, Ferhat Katmis, Mehmet C. Onbasli
Summary: A design of skyrmion-based logic inverter gate is presented and its full operation is analyzed using micromagnetic modeling. The gate exhibits low power consumption, wide bandwidth, and cascadability, and further reduction in power consumption is possible by using magnetic insulators.
