Article
Chemistry, Physical
William C. Mackrodt, Francesco S. Gentile, Roberto Dovesi
Summary: This paper reports the energies, charge, and spin distributions of both the vertically excited and fully relaxed GR1 states of the neutral singlet vacancy in diamond. The calculations suggest that both states are excitonic and insulating, with extensive re-distribution of charge and spin density. The paper also provides an explanation for why only the GR1 luminescence is observed and suggests an alternative channel for the recovery of the ground state in photoluminescence studies.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Quantum Science & Technology
Thea A. Vedelaar, Thamir H. Hamoh, Felipe P. Perona Martinez, Mayeul Chipaux, Romana Schirhagl
Summary: This article calibrates and optimizes the entire data processing flow from acquired raw data to extracted T1 using T1 relaxation curves acquired at different concentrations of gadolinium ions. The comparison is made between integrating the signal through an optimized window and fitting a known function on it. Furthermore, the three most commonly used fit models, single, bi, and stretched exponential, are compared.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Runrun Li, Thea Vedelaar, Aldona Mzyk, Aryan Morita, Sandeep Kumar Padamati, Romana Schirhagl
Summary: In this study, diamond magnetometry was used for the first time to track the degradation of degradable polymers. By measuring the fluorescent defect in nanodiamonds and its magnetic surrounding, the degradation process can be followed in real time with unprecedented sensitivity. This method can be applied to different types of polymers.
Article
Chemistry, Multidisciplinary
Runrun Li, Thea Vedelaar, Aldona Mzyk, Aryan Morita, Sandeep Kumar Padamati, Romana Schirhagl
Summary: In this study, diamond magnetometry was used for the first time to track the degradation of degradable polymers with nanoscale precision. The method is based on the optical properties of a fluorescent defect in nanodiamonds, which changes according to their magnetic surroundings. By using T1 measurements, which are sensitive to magnetic noise, the degradation of the polymer can be followed in real time. The mobility of nanodiamonds also increased, allowing estimation of polymer viscosity. The degradation rates obtained using this approach were in good agreement with data from other testing methods.
Article
Materials Science, Multidisciplinary
Russell A. Maier, Kevin F. Garrity, Andrew Ozarowski, Matthew P. Donohue, Giannantonio Cibin, Igor Levin
Summary: In the study of Mn ion substitution behavior in CaTiO3 ceramics, it was found that Mn can occupy both Ca and Ti sites. Comparing with SrTiO3 and BaTiO3, Mn in CaTiO3 prefers A-site substitution.
Review
Chemistry, Multidisciplinary
Yingke Wu, Tanja Weil
Summary: Nanodiamond (ND) quantum sensing technology has great potential for ultrasensitive diagnosis and probing subcellular parameters at ambient conditions, enabling the detection of local temperature, magnetic fields, electric fields, or strain. It has significant implications for addressing current challenges in biology and medicine.
Article
Chemistry, Multidisciplinary
Giulia Petrini, Giulia Tomagra, Ettore Bernardi, Ekaterina Moreva, Paolo Traina, Andrea Marcantoni, Federico Picollo, Klaudia Kvakova, Petr Cigler, Ivo Pietro Degiovanni, Valentina Carabelli, Marco Genovese
Summary: Temperature is a crucial parameter in regulating intracellular processes. Researchers have developed a nanoscale thermometer based on optically detected magnetic resonance in nanodiamonds to detect temperature variations associated with neuronal firing. This breakthrough provides a tool for studying localized temperature gradients under physiological and pathological conditions.
Article
Chemistry, Multidisciplinary
Burhannudin Sutisna, Stoffel D. Janssens, Alessandro Giussani, David Vazquez-Cortes, Eliot Fried
Summary: Polymer-nanodiamond composites offer a promising solution for multifunctional hybrid materials, integrating the flexibility of polymers and unique properties of nanodiamonds. By utilizing colloidal coassembly between poly(isoprene-b-styrene-b-2-vinyl pyridine) block copolymers and nanodiamonds, researchers successfully achieved a uniform sub-50 nm nanodiamond distribution in nanocomposite films. This method holds potential for developing hierarchically ordered nanocomposites with diverse applications, from biotechnology to quantum devices.
Article
Materials Science, Ceramics
Vijay Singh, Jung-Kul Lee, Aman Prasad, A. S. Rao
Summary: In this study, a series of CaYAl3O7 phosphors doped with different concentrations of Pb2+ were synthesized using an auto solution combustion route. The structure, luminescence, and electron paramagnetic resonance (EPR) spectra of the phosphors were analyzed. XRD patterns confirmed the formation of tetragonal phase CaYAl3O7 with a crystallite size ranging from 37 to 42 nm. SEM images revealed the surface morphology of the prepared samples. The emission spectra showed a wide emission band centered at 362 nm under 270 nm excitation for the phosphors. The EPR spectra of both undoped and Pb2+-doped CaYAl3O7 phosphors exhibited distinct defect centers, namely F+ -centers, with different g-values.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Applied
Maciej J. Glowacki, Mateusz Ficek, Miroslaw Sawczak, Anna Wcislo, Robert Bogdanowicz
Summary: This study proposes the use of fluorescent nanodiamonds as stable markers for investigating comestible liquids. By manipulating the composition and pH value of cocktails, the surface chemistry and stability of nanodiamonds can be altered. Nanodiamonds can be applied in monitoring the condition of foodstuffs and detecting toxins and pathogens.
Article
Chemistry, Analytical
Asma Akther, Ella P. Walsh, Philipp Reineck, Brant C. Gibson, Takeshi Ohshima, Hiroshi Abe, Gawain McColl, Nicole L. Jenkins, Liam T. Hall, David A. Simpson, Amgad R. Rezk, Leslie Y. Yeo
Summary: Diamond nanoparticles, particularly the NV centers, possess unique magneto-optic properties making them attractive for quantum sensing applications, but their performance in solution is often limited by poor signal-to-noise ratios and distribution inhomogeneities. Concentrating these nanoparticles through intense microcentrifugation in an acoustomicrofluidic device significantly improves the acquisition time due to the high density and acoustic contrast of diamond nanoparticles. This study reveals the surprising ability of diamond nanoparticles to concentrate under SAW microcentrifugation flow, highlighting their potential for enhanced sensing performance.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Xinran Li, Shuohan Li, Jian Xu, Lanxin Wang, Kaiwei Liang, Huihui Zhang, Xuelian Yu, Zhongwei Liu
Summary: This study successfully improved the efficiency of photocatalytic conversion of CO2 by modifying nanodiamond on the surface of graphitic carbon nitride, enhancing light absorption capacity and electron transport pathways, resulting in significantly improved CO2 photocatalytic performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Fabien Pascale, Klaus Doll, Alexander Platonenko, Michel Rerat, Roberto Dovesi
Summary: In recent papers on first row transition metal fluorides and oxides, little attention is paid to spin density, a crucial factor for determining the superexchange mechanism and the energy difference between ferro- and antiferromagnetic states. Spin density maps for 5 compounds in the KMF3 family illustrate the occupation of d orbitals, in contrast to the majority of papers on these systems. Using an all-electron scheme and Gaussian-type basis set, calculations show a clear interpretation of spin density in terms of d orbital shapes as seen in textbooks.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Ceramics
Yayan Xu, Haiyong Gan, Zhanling Lu, Renguang Ye, Tanghan Chen, Junjie Zhang, Ying Tian, Shiqing Xu
Summary: The study introduces a novel method to incorporate nanodiamond with increased negative-charged nitrogen-vacancy content to 75.48% into tellurite germanate glass, resulting in a stable structure with enhanced fluorescence intensity. This robust nanodiamond in glass system holds promise for nanoparticle sensing and quantum metrology.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Review
Chemistry, Physical
Stepan S. Batsanov, Sergey M. Gavrilkin, Dmitry A. Dan'kin, Andrei S. Batsanov, Alexander V. Kurakov, Tatiana B. Shatalova, Inna M. Kulikova
Summary: This review explores the interaction between DND and water, as well as the unique physico-chemical and biological properties of colloids with low DND content. These colloids exhibit a large dielectric permittivity with temperature dependence, and quasi-periodic fluctuations during evaporation or dilution. The study also reveals the formation of cottonwool-like fibers comprising living micro-organisms and DND particles through the interaction of DND with water and air.
Article
Physics, Atomic, Molecular & Chemical
S. B. Orlinskii, V. A. Soltamov, G. V. Mamin, O. G. Poluektov, J. Schmidt, P. G. Baranov
Summary: High-frequency ENDOR experiments were conducted to determine the hyperfine interaction between unpaired electrons and nuclear spins, translating into spin density of electronic wave functions. Studies on spatial distribution of wave functions for different crystals and nanostructures were presented. Observations include changes in electronic wave functions and direct reconstructions of shallow electronic centers and self-trapped excitons in certain materials. Additionally, limitations in modeling and successful dynamic nuclear polarization were discussed.
APPLIED MAGNETIC RESONANCE
(2022)
Article
Chemistry, Physical
Alexander Voznyakovskii, Aleksei Vozniakovskii, Sergey Kidalov
Summary: A phenomenological model for the synthesis of FLG nanosheets by the SHS method from starch, lignin, and other biopolymers is considered. The model suggests that carbonization of biopolymers under the SHS process conditions is chosen as the basic method of synthesis, with chemical reactions proceeding according to a specific mechanism of nonisothermal branched-chain processes. This model can explain the production of FLG nanosheets with linear dimensions of tens of microns and a thickness of several graphene layers.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2022)
Article
Chemistry, Physical
Aleksei Vozniakovskii, Alexandr Voznyakovskii, Sergey Kidalov, Evgeny Ovchinnikov, Ekaterina Kalashnikova
Summary: The use of hybrid materials can significantly enhance the thermal conductivity of nanofluids without changing the dynamic viscosity, while also lowering the freezing points of water and ethylene glycol.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2022)
Article
Physics, Multidisciplinary
K. V. Likhachev, I. D. Breev, S. V. Kidalov, P. G. Baranov, S. S. Nagalyuk, A. V. Ankudinov, A. N. Anisimov
Summary: We have fabricated a quantum magnetic field sensor based on silicon vacancy centers in 6H-SiC using atomic force microscopy technique. The quantum sensing relies on optically detected magnetic resonance. By attaching a single 6H-SiC nanoparticle to the tip of the atomic force microscopy cantilever, we have demonstrated the feasibility of quantum scanning microscopy in physiological and conductive environments.
Article
Nanoscience & Nanotechnology
A. I. Shames, G. G. Zegrya, D. M. Samosvat, V. Yu Osipov, A. Ya Vul
Summary: The experiments showed that the EPR spectra undergo qualitative changes as the size of diamond particles decreases. This is due to the indirect exchange interaction between localized electrons on bulk impurity centers and electrons on surface centers, resulting in resonant energy transfer and affecting the characteristic structure of the EPR spectra.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Chemistry, Physical
Sergey Kidalov, Alexander Voznyakovskii, Aleksei Vozniakovskii, Sofia Titova, Yvgenii Auchynnikau
Summary: The effect of particles of few-layer graphene (FLG) synthesized by self-propagating high-temperature synthesis (SHS) on the complex of strength and thermo physical properties of polymer composite products obtained by digital light processing (DLP) 3D printing were studied. It was found that the thermophysical and strength parameters of polymers were improved by FLG modification compared to unmodified base resin. This improvement was attributed to the low defectiveness and homogeneous distribution of FLG in the polymer structure. The hardness could be increased by 120%, bending strength by 102%, Charpy impact strength by 205%, and thermal conductivity at 25 degrees C by 572% with a concentration of few-layer graphene not exceeding 2 wt.%.
Article
Chemistry, Physical
Vasily T. Lebedev, Fedor M. Shakhov, Alexandr Ya. Vul, Arcady A. Zakharov, Vladimir G. Zinoviev, Vera A. Orlova, Eduard V. Fomin
Summary: Powder diamonds with integrated europium atoms were synthesized at high pressure and temperature. The concentration of Eu atoms in these diamonds was found to be two orders of magnitude higher than in natural and synthetic diamonds. The formation of high-quality diamond monocrystals containing Eu and a substantial amount of nitrogen was confirmed through various techniques.
Article
Chemistry, Multidisciplinary
Roman A. Babunts, Yulia A. Uspenskaya, Nikolai G. Romanov, Sergei B. Orlinskii, Georgy V. Mamin, Elena V. Shornikova, Dmitri R. Yakovlev, Manfred Bayer, Furkan Isik, Sushant Shendre, Savas Delikanli, Hilmi Volkan Demir, Pavel G. Baranov
Summary: Semiconductor colloidal nanoplatelets based on CdSe with magnetic Mn2+ ions show modified magneto-optical and spin-dependent properties. High-frequency electron paramagnetic resonance techniques were used to study the spin structure and dynamics of Mn2+ ions in core/shell CdSe/(Cd,Mn)S nanoplatelets. Two sets of resonances were observed, indicating different spin dynamics between surface and inner Mn2+ ions. The interaction between surface Mn2+ ions and 1H nuclei was measured using electron nuclear double resonance, providing information on the distances between Mn2+ ions and 1H nuclei.
Article
Chemistry, Physical
Irina N. Gracheva, Fadis F. Murzakhanov, Georgy V. Mamin, Margarita A. Sadovnikova, Bulat F. Gabbasov, Evgeniy N. Mokhov, Marat R. Gafurov
Summary: We have experimentally studied the spin Hamiltonian of the negatively charged boron vacancy defects (VB-) in hexagonal boron nitride (hBN) and determined the symmetry, anisotropy, and principal values of the hyperfine interaction (HFI) and nuclear quadrupole interaction (NQI). We have found that approximately 84% of the spin density of the VB- electron spin is localized on the three nearest nitrogen atoms, providing valuable spectroscopic data and experimental evidence for the VB- spin localization in a single two-dimensional BN layer.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Irina N. Gracheva, Fadis F. Murzakhanov, Georgy V. Mamin, Margarita A. Sadovnikova, Bulat F. Gabbasov, Evgeniy N. Mokhov, Marat R. Gafurov
Summary: The concept of optically addressable spin states of defects in wide band gap materials has been successfully applied in the development of quantum technologies. By studying the negatively charged boron vacancy defects (VB-) in hexagonal boron nitride (hBN), which has a van der Waals structure, the spin Hamiltonian and interactions with nearby nitrogen atoms have been experimentally explored. The results show a high localization of the VB- electron spin on the three nearest nitrogen atoms. These findings provide valuable spectroscopic data and demonstrate the spin localization in atomic-thin layers.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Physics, Multidisciplinary
R. A. Babunts, Yu A. Uspenskaya, A. S. Gurin, A. P. Bundakova, G. Mamin, A. N. Anisimov, E. N. Mokhov, P. G. Baranov
Summary: In this study, the frequencies of electron-nuclear interactions with C-13 and Si-29 nuclei on remote coordination spheres were determined in neutral V-Si-V-C divacancies in a silicon carbide crystal enriched with the C-13 isotope. High-frequency electron-nuclear double resonance and optically detected magnetic resonance techniques were used. Oscillations of electron spin density on Si-29 and C-13 nuclei were observed, and nuclear magnetic resonance transitions at Larmor and close-to-Larmor frequencies of C-13 and Si-29 led to significant changes in spin sublevels.
Article
Materials Science, Ceramics
Fadis F. Murzakhanov, Anna A. Forysenkova, Inna Fadeeva, Georgy Mamin, Marat R. Gafurov
Summary: In this study, powders of beta-tricalcium phosphate doped with manganese are comprehensively analyzed using electron paramagnetic resonance and electron-nuclear double resonance techniques. The positions of manganese in the crystal lattice and the origin of the hyperfine structures are explained. These results provide a fundamental background for the study of structurally disordered matrices with high spin impurities.
CERAMICS-SWITZERLAND
(2022)
Article
Physics, Condensed Matter
A. N. Anisimov, I. D. Breev, K. Likhachev, O. P. Kazarova, S. S. Nagalyuk, P. G. Baranov, B. Ya Ber, D. Yu Kazantcev, M. P. Scheglov, E. N. Mokhov
Summary: This study comprehensively analyzed the process of bulk AlN crystal formation on SiC substrates using various testing methods. The presence of silicon on the surface of the grown AlN crystals and at the SiC/AlN phase boundary was detected. Based on this discovery, a new model for the growth of high-quality bulk AlN crystals on SiC substrates through the formation of a layer of liquid silicon was proposed. The application of this model will facilitate the growth of large, high-quality AlN crystals.
Article
Physics, Multidisciplinary
Harpreet Singh, Mario Alex Hollberg, Andrey N. Anisimov, Pavel G. Baranov, Dieter Suter
Summary: This paper investigates the multi-photon transitions of silicon vacancy driven by a strong RF field in a low magnetic field. By measuring continuous-wave optically detected magnetic resonance spectra and observing the Rabi oscillations and free induction decays, the authors identify the multiple RF photon transitions of different types of silicon vacancy.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Condensed Matter
A. Jbeli, N. Zeiri, N. Yahyaoui, P. Baser, M. Said
Summary: The electronic and optical properties of CdSe/ZnSe semiconductor core/shell quantum dots with hydrogenic donor impurity were investigated theoretically. The perturbation and variational methods were used to calculate the binding energy, photoionization cross-section, polarizability, and diamagnetic susceptibility of the excited impurity under various conditions. A significant stark shift in the binding energy was observed under the influence of an external electric field.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Rahat Batool, Tariq Mahmood, Sajid Mahmood, Abdul Aziz Bhatti
Summary: This study investigates the effects of alkali metal doping (Na, K, Cs) on MAPbI3 through compositional engineering. The results show that doping Na, K, and Cs can improve the phase stability, thermodynamic stability, and optical absorption of MAPbI3.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
N. A. N. M. Nor, M. A. H. Razali, W. H. A. W. K. Annuar, N. N. Alam, F. N. Sazman, N. H. M. Zaki, A. S. Kamisan, A. I. Kamisan, M. H. Samat, A. M. M. Ali, O. H. Hassan, B. U. Haq, M. Z. A. Yahya, M. F. M. Taib
Summary: This study investigates the potential of quaternary chalcogenides semiconductors as thin film solar cell absorbers using density functional theory (DFT) and density functional theory plus Hubbard U (DFT + U) approach. The results show that by applying Hubbard U terms, the electronic band gaps can be accurately predicted, providing valuable insights for finding cost-effective new thin film solar cell materials.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yang Gao, Shu-Ming Chen, Shuo Cao, Shang-Zhou Zhang, Philippe Djemia, Qing-Miao Hu
Summary: This study investigates the phase stability, elastic modulus, and hardness of ternary nitride Ti1-xAlxN. It is found that the hardness increases with the Al content x. The cubic B1 structure is more stable for x < about 0.75, while the hexagonal structure (B4) is more stable for x > about 0.75. The composition dependent hardness and phase decomposition contribute to the convex shaped hardness curve of Ti1-xAlxN.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Fengqi Wang, Qinyan Ye, Xulin He, Kun Luo, Xiaolong Ran, Xingping Zheng, Cheng Liao, Ru Li
Summary: This report uses rigorous calculations based on density functional theory to study the piezoelectric and elastic properties of wurtzite aluminum nitride (w-AlN) with single- and co-alloying by Hf (or Zr) and Sc. The research finds that the (HfSc)0.375Al0.625N and (ZrSc)0.375Al0.625N with stable wurtzite phase have a large piezoelectric coefficient d33 of 49.18 pC/N and 47.00 pC/N, respectively. However, the piezoelectric voltage constant g33 and electromechanical coupling constant k233 of HfAlN, ZrAlN, HfScAlN, and ZrScAlN are smaller than that of ScAlN, which is attributed to the large dielectric constant epsilon 33 of Hf (or Zr) alloying samples. Furthermore, the calculations of internal parameter u and bond angle alpha elucidate the brittle-to-ductile transformation in alloying w-AlN crystal structure. Electronic structure calculations show that the bandgap decreases almost linearly with the increase of alloying concentration, and the Hf (or Zr) alloying compounds become n-type semiconductors due to the existing high-charge states.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
S. R. Athul, K. Arun, S. Swathi, U. D. Remya, Andrea Dzubinska, Marian Reiffers, Nagalakshmi Ramamoorthi
Summary: The magnetic and magnetocaloric characteristics of Ho6FeSb2 have been studied. The compound exhibits two second-order ferromagnetic transitions, enabling hysteresis-free magnetocaloric effect across a wide temperature range. The alloy has high relative cooling power and magnetoresistance, making it suitable for hysteresis-free magnetocaloric applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A polycrystalline double perovskite La2CoMnO6 sample was prepared and its structural, dielectric and magnetic properties were investigated. The sample exhibited complex structures and magnetic behavior, and showed good conductivity and dielectric performance. Its multi-domain magnetic structure suggests its suitability for memory device applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Shubha Dubey, Jisha A. Abraham, Kumud Dubey, Vineet Sahu, Anchit Modi, G. Pagare, N. K. Gaur
Summary: This study investigates the optoelectronic, thermodynamic, thermoelectric, and mechanical stability properties of RhTiP Half Heusler semiconductors. The results show that RhTiP is a non-magnetic material with confirmed mechanical stability. It is found to be an indirect-bandgap semiconductor with a good Seebeck coefficient. This study suggests that RhTiP has promising applications in the thermoelectric and optoelectronic fields.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Xun Xie, Jiong-Ju Hao, Hong-Wei Yang
Summary: This work presents a multilayer film structure that uses optical resonance to prepare highly efficient and saturated red, green, and blue transmittance colors. Numerical simulations and analysis show that the structure can produce R, G, and B colors with a purity comparable to standard RGB colors, while maintaining efficient transmission efficiency and obtaining a rich variety of structural colors. Additionally, a metallic interlayer is introduced to selectively suppress resonances in the short-wavelength region, improving the purity of the red color. The study also investigates the effect of the incidence angle on color purity and transmission efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yueqiang Zhao
Summary: Solubility property is of great interest in chemical, physical, pharmaceutical, material, and environmental sciences. Understanding the intrinsic reason behind solubility behavior is a fascinating task. The theoretical relation between binary mutual solubility and liquid-liquid interfacial tension has been derived, where the partitioning of solute molecules between two coexisting liquid phases is determined by the transfer free energy per unit segment for a chain-like solute molecule expressed in terms of solute-solvent interfacial tension. This general theory of solubility is in good agreement with experimental results for binary mutual solubility and molar transfer free energy of solute molecules.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Osama K. M. Bashiar, R. E. Kroon, H. C. Swart, R. A. Harris
Summary: ZnO thin films with near-infrared emission were successfully fabricated using pulsed laser deposition under vacuum conditions, without the need for additional gases or implantation methods. The NIR emission was hypothesized to be caused by defects in the ZnO film due to high energy particle impacts on the sample surface.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
O. Stognei, A. Berezutskii, I. Anisimov, A. Deryabin
Summary: The influence of ZrOn matrix stoichiometry on the electrical and magnetoresistive properties of Fe-Zr-O nanocomposites has been studied. It was found that the magnetoresistive effect is not observed in composites with oxygen lack, while composites with oxygen excess show magnetoresistive effect and increased resistivity. Magnetoresistivity in composites with oxygen lack only appears after heat treatment. These results can be explained by the difference in the density of localized states in the oxide matrix of the composites and the ratio between two types of conductivity.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Mehmet Bayirli, Aykut Ilgaz, Orhan Zeybek
Summary: The present study aims to understand the relationship between impedance characteristics and fractal behaviors. By producing neat and carbon nanotube doped composite specimens, the researchers investigated the electrical properties and surface heteromorphology using Nyquist plots and fractal analysis.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
M. I. Khan, Saddam Hussain, Muhamad Saleem, Fatimah Mohammed Alzahrani, Muhammad Siddique, M. S. Hassan, Allah Ditta Khalid, Munawar Iqbal
Summary: The sol-gel method was used to deposit Ti-doped MAPbBr3 films on FTO-glass substrates with different doping ratios (0%, 4%, and 6%). XRD analysis confirmed the cubic structure of all films, and the 4% Ti-doped film exhibited a large grain size, low band gap energy, and high refractive index. Solar cells fabricated using the 4% Ti-doped MAPbBr3 film showed improved performance in terms of current density, open circuit voltage, fill factor, and efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
