Article
Materials Science, Ceramics
A. Sivakumar, S. Ramya, S. Sahaya Jude Dhas, Abdulrahman Almansour, Raju Suresh Kumar, Natarajan Arumugam, Magesh Murugesan, S. A. Martin Britto Dhas
Summary: Recent research has shown that shock wave loaded cerium oxide nano-crystalline materials exhibit excellent crystallographic and electronic phase stability, making them suitable for applications such as medical glassware, spaceship windows, and technological coatings.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
A. Sivakumar, S. Sahaya Jude Dhas, Raju Suresh Kumar, Abdulrahman Almansour, Natarajan Arumugam, Magesh Murugesan, S. A. Martin Britto Dhas
Summary: In this study, the stability of the crystallographic and magnetic phases of zirconium oxide nanoparticles (ZrO2 NPs) under shock conditions was investigated using X-ray diffraction, diffuse reflectance spectroscopy, and vibrational sample magnetometer. The results showed that the crystallographic structure remained intact, while the magnetic states underwent reversible phase transitions. This reversible behavior suggests the potential application of ZrO2 NPs in magnetic sensors and spintronics.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Inorganic & Nuclear
E. Delhi Dona, A. Sivakumar, S. Sahaya Jude Dhas, P. Sivaprakash, S. Arumugam, S. A. Martin Britto Dhas
Summary: This research investigates the crystallographic and magnetic phase stability of Corundum-type Cr2O3 nanoparticles under shock wave loaded conditions. The results show that Cr2O3 NPs exhibit excellent shock-resistant behavior and could be considered for aerospace device fabrication due to their outstanding structural stability against shock waves.
SOLID STATE SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
V Mowlika, C. S. Naveen, A. R. Phani, A. Sivakumar, S. A. Martin Britto Dhas, R. Robert
Summary: The systematic study explored the impact of shock waves on prepared cobalt ferrite nanoparticles, analyzing the results using X-ray diffraction, spectroscopic, and microscopic techniques. Evaluation of the crystallographic phase and molecular finger-print was carried out using XRD and Raman spectroscopy, while morphological characteristics were examined through SEM. The magnetic behavior performance was monitored using VSM, revealing the potential to reconfigure the magnetic properties of CoF NPs for soft magnetic applications without altering the original crystalline phase.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
A. Sivakumar, S. Sahaya Jude Dhas, Abdulrahman Almansour, Raju Suresh Kumar, Natarajan Arumugam, S. Prabhu, Kundan Sivashanmugan, R. Ramesh, S. A. Martin Britto Dhas
Summary: The study found that shock wave loaded CoFe2O4 nanoparticles exhibit high specific capacitance and homogenous particle size distribution, making them suitable for energy storage applications.
SURFACES AND INTERFACES
(2021)
Article
Polymer Science
A. Sivakumar, S. Kalaiarasi, S. Sahaya Jude Dhas, P. Sivaprakash, S. Arumugam, M. Jose, S. A. Martin Britto Dhas
Summary: This research experimentally evaluated the shock wave resistant properties of anatase and rutile phase TiO2 nanoparticles, finding that rutile TiO2 NPs are more suitable for aerospace and defense industrial applications due to their superior shock resistant properties compared to anatase TiO2 NPs.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. Sivakumar, S. Sahaya Jude Dhas, Abdulrahman Almansour, Raju Suresh Kumar, Natarajan Arumugam, Karthikeyan Perumal, S. A. Martin Britto Dhas
Summary: This study investigates the impact of dynamic shock waves on barium carbonate nanoparticles, showing that the sample can maintain its original crystal structure even under high-shock conditions. It exhibits higher shock resistance compared to other industrial nanocrystalline materials such as TiO2 and Co3O4. Due to its outstanding structural stability, barium carbonate has the potential to be used in manufacturing electronic devices, optical glasses, and aerospace applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Ceramics
Rachida Lamouri, Ki Hyeon Kim
Summary: In this study, MnFe2O4 nanoparticles were synthesized through a facile solvothermal method and then enveloped with iron oxide nanoparticles using ethanol and ethylene glycol as solvents. The resulting nanoparticles showed a homogeneous distribution of spherical particles with an average size of 12 to 16 nm. The encapsulation process did not affect the particle distribution, with a very thin layer of Fe3O4 on the shell structure. The core@shell structure exhibited improved magnetic properties compared to pure MnFe2O4, as confirmed by magnetization and electron spin resonance. The heating efficiency, evaluated in terms of specific loss power, was significantly increased in the core@shell structure.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Luu Huu Nguyen, Le The Tam, Nguyen Hoai Nam, Do Khanh Tung, Nguyen Xuan Truong, Dinh Van Tuan, Nguyen Van Quynh, Nguyen Le Minh Tri, Pham Thanh Phong, Pham Hong Nam
Summary: In this study, MnFe2O4 doped Gd (MnGdxFe2-xO4 with x = 0, 0.125, 0.25, and 0.5) magnetic nanoparticles were successfully synthesized, and the effect of Gd content on the structural, optical, and magnetic properties was investigated. The replacement of Fe3+ ions with Gd3+ ions resulted in a change in crystallite size and band gap. The saturation magnetization and magnetic anisotropy decreased with increasing Gd3+ ion concentration. The substantial reliance of magnetic anisotropy on the doping concentration was demonstrated.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
A. Sivakumar, S. Sahaya Jude Dhas, P. Sivaprakash, Abdulrahman Almansour, Raju Suresh Kumar, Natarajan Arumugam, Karthikeyan Perumal, S. Arumugam, S. A. Martin Britto Dhas
Summary: The study investigated the Raman spectroscopic and electrochemical measurements of manganese ferrite nanoparticles under dynamic shock conditions, revealing the stability of the crystal structure, electro-chemical properties, and electrical conductivity changes. However, there were no crystallographic phase transitions or mixed spinel states observed in the test samples under shock conditions.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Mechanics
Meixiang Huang, Yuanjin Wang, Zhiqiang Shao
Summary: In this paper, we constructively solve the piston problem for a modified Chaplygin gas in the one-dimensional isentropic Euler equations. We rigorously prove the global existence and uniqueness of a shock wave that separates constant states ahead of the piston when it advances into the gas. The results differ significantly from those for a pure Chaplygin gas or a generalized Chaplygin gas.
Article
Chemistry, Physical
Lei Gong, Guangbo Chen, Juncheng Lv, Ming Lu, Junkai Zhang, Xiaoxin Wu, Jingshu Wang
Summary: The study demonstrates that external pressure can modulate the structure-function relationship of MnFe2O4 nanoparticles, significantly affecting lattice contraction and conductivity.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
S. K. Shaw, J. Kailashiya, Santosh K. Gupta, C. L. Prajapat, Sher Singh Meena, D. Dash, P. Maiti, N. K. Prasad
Summary: Magnetic nanoparticles (MNPs) have shown great potential in thermo-therapeutic modalities such as magnetic fluid hyperthermia (MFH) and photo-thermal therapy (PTT). In this study, MnFe2O4 nano-flowers were synthesized and utilized as nano-heat generators for MFH and PTT. The material exhibited effective heating under alternating magnetic field (AMF) and impressive heating ability under near infra-red (NIR) irradiation. The results indicated that MnFe2O4 nano-flowers had higher intrinsic loss power compared to commercially available ferro-fluids and showed significant cell death during photo-thermal treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Astronomy & Astrophysics
Thibaud Richard, Pierre Lesaffre, Edith Falgarone, Andrew Lehmann
Summary: This study systematically investigates the physical nature of intense dissipation regions in decaying isothermal magnetohydrodynamical turbulence. The results reveal that these regions mainly correspond to sheets and can be categorized as fast and slow shocks or Alfven discontinuities. The study also finds that the initial conditions and the magnetic Prandtl number have different impacts on the distributions and heating rates within these structures. Additionally, the study shows a strong correlation between the entrance characteristics of the structures.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Green & Sustainable Science & Technology
Nguyen Van Quang, Pham Thi Lan Huong, Nguyen Tu, Nguyen Thi Huyen, Nguyen Tri Tuan, Manh Trung Tran, Anh-Tuan Le
Summary: Manganese ferrite nanoparticles were synthesized using a coprecipitation method, with annealing conditions affecting crystalline quality and magnetic properties differently. Annealing in argon significantly improved crystalline quality and saturation magnetization, leading to higher efficiency under sunlight irradiation in the presence of hydrogen peroxide.
Article
Chemistry, Organic
R. Dhanjayan, S. Suresh, S. Srinivasan, S. Sahaya Jude Dhas
Summary: An organic nonlinear optical crystal, L-histidinium-4-nitrophenolate 4-nitrophenol (LHPNP), was successfully grown using the slow evaporation method. The crystal exhibited excellent thermal stability and second harmonic generation (SHG) efficiency. Spectral measurements and hardness tests confirmed its monoclinic crystal structure and non-centrosymmetric space group. Dielectric studies revealed good electrical properties.
POLYCYCLIC AROMATIC COMPOUNDS
(2023)
Article
Chemistry, Applied
Baskaran Palanivel, Md Shahadat Hossain, Romulo R. Macadangdang Jr, S. Sahaya Jude Dhas, Abdullah M. Al-Enizi, Mohd Ubaidullah, Woo Kyoung Kim, Sreedevi Gedi, S. Ignatius Arockiam
Summary: In this study, a hydrothermally prepared rGO/Gd@ZnO nanocomposite was reported for photocatalytic dye degradation. The prepared nanoparticles were characterized and the results showed that the composite catalyst exhibited high degradation efficiency and stability.
JOURNAL OF RARE EARTHS
(2023)
Article
Materials Science, Multidisciplinary
A. Sivakumar, S. Sahaya Jude Dhas, Lidong Dai, V. Mowlika, P. Sivaprakash, Raju Suresh Kumar, Abdulrahman I. Almansour, S. Arumugam, Ikhyun Kim, S. A. Martin Britto Dhas
Summary: Most materials undergo phase transitions or lattice deformations under shock-loaded conditions, which greatly affects the efficiency of second harmonic generation in nonlinear optical materials. This study focuses on investigating the crystallographic phase stability of L-Valine powder samples under shock-loaded conditions. X-ray diffraction, optical spectroscopy, and microscopic studies were used to characterize shock-exposed and virgin samples. The results confirmed that the title sample exhibited high shock resistance, and the diffraction results were compared with potassium dihydrogen phosphate (KDP) for validation.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
A. Sivakumar, S. Sahaya Jude Dhas, Lidong Dai, J. Thirupathy, K. Sethuraman, Raju Suresh Kumar, Abdulrahman I. Almansour, N. Vijayan, S. A. Martin Britto Dhas
Summary: Experimentation under dynamic shocked conditions has become a popular method for identifying functional materials with altered long-range order. In this study, the dynamic impact of shock waves on single crystals of sulfamic acid was investigated. X-ray diffraction and Raman spectroscopy were used for analysis. The results showed sequential ordered-disordered-ordered phase transitions with increasing number of shock pulses. The observed switchable phase transitions between order and disorder states may have potential applications in molecular electronic devices.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
A. Steephenraj, Chinnasami Sidden, Rajesh Paulraj, S. Sahaya Jude Dhas
Summary: In this study, a single crystal of 2-methyimidazolium hydrogen oxalate dihydrate (2MIO) was successfully grown using the solution growth technique. The crystal's lattice parameters were determined by single-crystal X-ray diffraction analysis. The crystal was characterized for its crystalline phase, composition, and nonlinear optical efficiency. The results showed that the 2MIO crystal had good transmittance and a lower cut-off wavelength of 280 nm. Thermal measurements, Z-scan study, and quantum chemical calculations were performed to investigate the decomposition, nonlinear optical properties, and molecular characteristics of 2MIO. The computational studies revealed that the first-order hyperpolarizability of 2MIO was 4.95 times higher than that of standard urea.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
S. Janet Priyavathani, S. Stella Mary, S. Sahaya Jude Dhas, P. Gandhimathi, S. Usharani
Summary: In this study, an amino acid-based single crystal of doped L-Methionine Succinic Acid (LMS) was grown by slow evaporation method at room temperature, and its physio-chemical properties were reported. The crystallographic structure and lattice parameters of the grown crystal were studied using the Single Crystal XRD method. The UV-Visible Spectral analysis confirmed that the LMS crystal is suitable for various optical applications due to its wide optical transmittance window in the visible region. The presence of functional groups was estimated using the FTIR technique. The VSM study revealed that the LMS crystal belongs to the category of soft magnetic materials.
CHEMICAL PHYSICS IMPACT
(2023)
Article
Crystallography
Sivakumar Aswathppa, Sahaya Jude Dhas Sathiyadhas, V. Muthuvel, Lidong Dai, Martin Britto Dhas Sathiyadhas Amalapushpam
Summary: This article compares the long-range order crystalline perfection of crystals grown by the unidirectional growth technique in different planes. The results show that uni-indexed crystals have a high degree of crystalline perfection, bi-indexed crystals have some degree of perfection, while tri-indexed crystals have higher lattice disorders. Uni-indexed crystals grown on planes such as (100), (010), and (001) are the best choice for growing highly crystalline materials, and the slow evaporation technique is suitable for obtaining tri-indexed crystals with good crystallinity.
CRYSTAL RESEARCH AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
A. Sivakumar, A. Saranraj, S. Sahaya Jude Dhas, T. Vasanthi, V. N. Vijayakumar, P. Sivaprakash, V. Pushpanathan, S. Arumugam, Lidong Dai, S. A. Martin Britto Dhas
Summary: Recent reports have shown outstanding results in shock wave experiments on non-linear optical (NLO) crystals, with suitable candidates being studied for industrial applications. In this particular experiment, tri-glycine sulfate (TGS) was chosen for investigating the structural properties under shock wave loaded conditions using X-ray diffraction and Raman spectroscopic measurements. The results demonstrate that the test sample does not undergo crystallographic phase transition but shows additional shoulder peaks and changes in Raman bands due to the re-orientational effect of glycine molecules.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
A. Sivakumar, P. Eniya, S. Sahaya Jude Dhas, Lidong Dai, Raju Suresh Kumar, Abdulrahman I. Almansour, A. Sakthisabarimoorthi, J. Kalyana Sundar, S. A. Martin Britto Dhas
Summary: In this study, shock wave recovery experiments were conducted on poly-crystalline lithium sulfate monohydrate crystals (Li2SO4.H2O) under 50 and 100 shock pulses loaded conditions. The results were compared to single crystal Li2SO4.H2O. The poly-crystalline samples did not undergo crystallographic phase transitions or shock wave assisted dehydration. However, structural deformation and distortions were observed in the mother crystal structure under shock loaded conditions. The saturation magnetization of Li2SO4.H2O was significantly reduced in the shocked state.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
M. Lawrence, P. Rajesh, M. Vimala, R. Girija, S. Sahaya Jude Dhas
Summary: This work presents an integrated experimental and theoretical study on the molecular structure and vibrational spectra of N-allyl-N-ethylformamide (NAEF). Density functional theory (DFT) calculations were performed to obtain the geometrical parameters and electronic properties of NAEF. The non-linear optical properties and vibrational assignments were analyzed, and thermodynamic functions were computed at different temperatures. NMR spectroscopy and quantum computational chemistry methods were used to understand the structures of NAEF. Furthermore, techniques such as topological analysis and drug-likeness were employed to determine the structure and other properties of NAEF. The molecular docking study identified the residues with the highest docking score and the most non-covalent interactions.
Article
Engineering, Electrical & Electronic
C. John Clement Singh, J. Samuel, C. S. Biju, S. Sahaya Jude Dhas, S. Usharani
Summary: In this study, Sn-doped ZnO nanorods with different Sn concentrations were prepared, and their properties were investigated using XPS and Raman measurements. The results show that Sn is effectively incorporated into the ZnO lattice in the 5% Sn-doped ZnO nanorods. Photoluminescence measurement reveals that the 5% Sn-doped ZnO nanorods exhibit higher emission intensity in the UV-visible regime, and they also demonstrate good UV-blocking performance in both the UVA and UVB bands. Additionally, the material shows positive antibacterial effect against S. aureus.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Physical
V. Pushpanathan, S. Sahaya Jude Dhas, D. Suresh Kumar
Summary: The tetraiminediphenol macrocyclic complexes of Co(II), Ni(II), Cu(II), Zn(II) were synthesized by condensation of 2,6-diformyl-4-methylphenol and 1,2-diaminobenzene with hydrated metal(II) nitrates as templates. The synthesized complexes were characterized by various analytical techniques and found to be stable and crystalline in nature. The effects of metal ions on the surface morphology of the complexes were analyzed using scanning electron microscopy.
CHEMICAL PHYSICS IMPACT
(2023)
Article
Materials Science, Multidisciplinary
Sivakumar Aswathappa, Lidong Dai, Sahaya Jude Dhas Sathiyadhas, Martin Britto Dhas Sathiyadhas Amalapushpam, Muthuvel Vijayan, Ikhyun Kim, Raju Suresh Kumar, Abdulrahman I. Almansour
Summary: This study investigated the acoustic shock wave response and structural characteristics of amorphous carbon nanoparticles under extreme conditions. It was found that short-range amorphous pockets transformed into spatially short-range ordered graphitic domains after shock, while the saturation magnetization decreased.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
A. Sivakumar, P. Eniya, S. Sahaya Jude Dhas, Lidong Dai, P. Sivaprakash, Raju Suresh Kumar, Abdulrahman I. Almansour, J. Kalyana Sundar, Ikhyun Kim, S. A. Martin Britto Dhas
Summary: In this study, the crystallographic structural stability of poly-crystalline lead nitrate samples at shocked conditions is reported and compared with single-crystalline lead nitrate crystal. The results show that the poly-crystalline samples retain the original crystallographic structure even under shock wave conditions, while single crystals undergo crystalline to amorphous phase transition. This study highlights the higher structural stability of poly-crystalline samples.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mahsa Saberian, Alireza Nezamzadeh-Ejhieh
Summary: CuO was successfully supported on clinoptilolite nanoparticles (NCP) via ion exchange and calcination, forming CuO-NCP photocatalysts. CuO-NCP exhibited enhanced photocatalytic activity towards tetracycline (TC), and the best degradation performance was achieved under optimal conditions (25 ppm TC solution, pH 4.8, and 0.5 g/L catalyst).
SOLID STATE SCIENCES
(2024)
