Article
Nanoscience & Nanotechnology
Jun Du, Kent Christian, Qirong Yang, Chawon Hwang, Eoin McAleer, Richard A. Haber
Summary: The study found that the stability of boron and silicon in boron carbide varies, with boron showing higher stability while silicon is in a metastable state under certain conditions. Dedoping of silicon may result in amorphization and degrade the ballistic performance of boron carbide.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Ceramics
Seema Thakur, Vanita Thakur, Anumeet Kaur, Lakhwant Singh
Summary: The structural and optical properties of bismuth barium titanate glass-ceramics were studied, revealing that an increase in BaTiO3 content led to enhanced network compactness and higher optical band gap energy. The electronic polarizability values indicated that the glass-ceramic samples exhibited covalent character.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Ritesh Verma, Ankush Chauhan, Khalid Mujasam Batoo, Muhammad Hadi, Emad H. Raslan, Rajesh Kumar, Muhammad Farzik Ijaz, Abdulaziz K. Assaifan
Summary: The synthesis of vanadium-doped BCZT ceramic oxides was reported in this paper, confirming the existence of a solubility limit of V in BCZT ceramics. Analysis revealed the influence of crystal structure and formation of oxygen vacancies on the luminescence and electrical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Spectroscopy
Magdalena Gaweda, Piotr Jelen, Maciej Bik, Magdalena Szumera, Zbigniew Olejniczak, Maciej Sitarz
Summary: Vibrational spectroscopy is an indispensable tool for examining silicon oxycarbide-based amorphous materials. In this study, SiOC glasses were modified with phosphate ions, and the structural examination was mainly carried out using infrared and Raman spectroscopy. The obtained results proved the efficient preparation of desired materials with structural parameters similar to the unmodified one.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Multidisciplinary
A. Ali, Jolly Jacob, Khurram Mehboob, Sajad Hussain, Arslan Ashfaq, K. Mahmood, S. Ikram, N. Amin, U. Rehman, Sofia Akbar, Sajid Hussain Siyal
Summary: This study focused on improving the thermoelectric properties of CZTS thin films by engineering secondary phases. By controlling the sulfur concentration, the Seebeck coefficient, electrical conductivity, and power factor were significantly increased. Various characterization techniques confirmed the development of CuS-based secondary phases and the decrease in crystalline size with increasing sulfur content.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Silvia Marola, Silvia Bosia, Alessandro Veltro, Gianluca Fiore, Diego Manfredi, Mariangela Lombardi, Giampiero Amato, Marcello Baricco, Livio Battezzati
Summary: This study utilized two non-destructive techniques, Raman spectroscopy and XRD method, to determine residual stresses in AlSi10Mg alloy samples. The results show that both methods can effectively evaluate the residual stresses of Al and Si in the alloy.
MATERIALS & DESIGN
(2021)
Article
Physics, Multidisciplinary
Thomas B. Shiell, Li Zhu, Brenton A. Cook, Jodie E. Bradby, Dougal G. McCulloch, Timothy A. Strobel
Summary: Bulk, highly oriented, crystalline 4H hexagonal silicon (4H-Si) was successfully synthesized through a metastable crystalline transition pathway by heating the single-crystalline Si-24 allotrope. The resulting 4H-Si crystallites exhibit an orientation relationship with the Si-24 crystals, indicating a structural relationship between the two phases. Optical absorption measurements confirm that 4H-Si has an indirect band gap near 1.2 eV, in agreement with first principles calculations.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
J. Antonowicz, P. Zalden, K. Sokolowski-Tinten, K. Georgarakis, R. Minikayev, A. Pietnoczka, F. Bertram, M. Chaika, M. Chojnacki, P. Dluzewski, K. Fronc, A. L. Greer, C. Jastrznbski, D. Klinger, Ch Lemke, O. M. Magnussen, B. Murphy, K. Perumal, U. Ruett, K. J. Warias, R. Sobierajski
Summary: In this study, ultrafast heating and rapid cooling processes in the devitrification of thin film Cu67Zr33 metallic glass were investigated using ultrashort pulsed laser annealing. X-ray diffraction snapshots were taken during the glass-crystal transformation, revealing the formation of a crystalline ZrO2 layer and the nucleation and growth of fcc-Cu in the amorphous matrix. At low annealing temperatures, the devitrification kinetics of ZrO2 and Cu are correlated, while at high temperatures ZrO2 forms much faster than Cu.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
E. Zielony, R. Szymon, A. Wierzbicka, A. Reszka, M. Sobanska, W. Pervez, Z. R. Zytkiewicz
Summary: In this study, Raman scattering and X-ray diffraction techniques were used to investigate strain and lattice vibration mechanisms in self-assembled GaN-AlxGa1-xN nanowire structures. The analysis of Raman spectra and XRD data provided insights into the chemical composition, strain, and lattice vibration mechanisms in these nanowires.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
S. Kabadou, J. Horcheni, F. Mselmi, A. Kabadou, E. Dhahri, L. Bessais
Summary: The polycrystalline ZrTe3O8:2%Er, 3%Mn material was prepared using solid-state reaction technique, and it exhibited a cubic phase structure with two types of polyhedrons. The Raman spectrum revealed the asymmetric stretching vibration of the Te-O-2-Zr bridges, and the magnetic results showed weak ferromagnetic behavior at low temperature. Additionally, the ZrTe3O8:2%Er, 3%Mn material showed significant emission in the visible and near-infrared range when excited at 490 nm, making it suitable for W-LED applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Vikas, M. S. Dahiya, Ashima Hooda, Satish Khasa
Summary: Transition Metal Ion (TMI) doped barium-boro-bismuthate glasses were synthesized using melt quench technique. The physical and structural behavior of the synthesized and annealed compositions were analyzed. The results showed that the density of the glass samples increased with the increase in MoO3 concentration, while the concentration of Non-Bridging Oxygen (NBO) decreased. The microstructure analysis using FESEM/EDX technique confirmed the crystalline growth in the annealed samples.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
Moustafa Ahmed, Yas M. Al-Hadeethi, Arwa T. Kutbee, Essam R. Shaaban
Summary: Thin films of semiconductor Se80Ge20-xAgx (x=0, 3, 6, 9, 12 and 15 at.%) were deposited by thermal evaporation technology, and the influence of Ag ratio on their photoelectric parameters was studied. The results showed that annealing transformed the films into polycrystalline state, and the crystallization temperature and kinetics were analyzed. Additionally, bandgap energy of the films could be controlled by altering the annealing conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Wanja Gschwind, Brian D. McCarthy, Nina F. Suremann, Sascha Ott
Summary: Water has a significant impact on the vapor-assisted conversion synthesis of UiO-67 MOF thin films on Au-coated Si substrates. While it affects the vapor phase composition, it does not significantly influence acetic acid equilibration rate. The presence of some water is necessary for the formation of zirconium clusters, but excessive water leads to poorly crystalline materials.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Umang Berwal, Vinod Singh, Rinku Sharma
Summary: This study investigates the optical and structural properties of pyrochlore oxide Gd2-xTbxTi2O7, and finds that the doping of rare-earth element leads to structural distortion and the production of defects. With increasing doping concentration, the particle size and spectral characteristics of the compounds change accordingly.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Housei Akazawa
Summary: This report introduces a method to evaluate the crystallographic orientation and crystallinity of HAp thin films using Raman scattering spectroscopy. By analyzing the Raman spectra, the presence or absence of certain signals can indicate the orientation of HAp crystals. Another approach involves evaluating crystallinity based on the line width of specific Raman signals.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Sandro Spagnolo, Eric S. Muckley, Ilia N. Ivanov, Tibor Hianik
Summary: The study demonstrated the detection of proteolysis of beta-casein by trypsin using a multiharmonic quartz crystal microbalance (QCM) biosensor. Increasing trypsin concentration led to removal of the casein layer, correlating with an increase in QCM resonant frequency. The study also investigated the kinetics of beta-casein proteolysis by trypsin and estimated the Michaelis-Menten constant and the limit of detection using an inverse Michaelis-Menten model.
Article
Multidisciplinary Sciences
R. Seth Wood, Bryan C. Chakoumakos, Allison M. Fortner, Kat Gillies-Rector, Matthias D. Frontzek, Ilia N. Ivanov, Linda C. Kah, Brian Kennedy, Brenda M. Pracheil
Summary: This study used neutron diffraction and Raman spectroscopy to identify and quantify the mineralogical compositions of Chinook salmon otolith pairs. The study found that the mineralogical compositions often differed between otoliths in a pair, and accurate identification of calcium carbonate polymorphs was rarely possible by visual inspection alone.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Marek Tatarko, Ilia N. Ivanov, Tibor Hianik
Summary: In this study, the regulatory effects of plasmin and trypsin in the presence of their inhibitor, alpha(2)-antiplasmin, were monitored using the research quartz crystal microbalance (RQCM). The results showed that alpha(2)-antiplasmin could fully inhibit the activity of both proteases. Additionally, it was observed that autolysis and degradation decreased the activity of plasmin in freshly activated samples. The half-life of plasmin was determined to be 2.48 ± 0.28 days.
Article
Nanoscience & Nanotechnology
David A. Garfinkel, Vasudevan Iyer, Robyn Seils, Grace Pakeltis, Marc R. Bourgeois, Andrew W. Rossi, Clay Klein, Benjamin J. Lawrie, David J. Masiello, Philip D. Rack
Summary: Trimer meta-atoms composed of three gold rods were fabricated and their near-field plasmonic responses were characterized. The magnetic and electric modes of the trimer structure could be tuned by changing the length of the rods. The study also found that the intensity of the electric mode increased more than expected, while the magnetic mode showed the expected tilt dependence. This research opens up new possibilities for studying the nanoscale excited-state of other magnetic meta-atom structures.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
David A. Garfinkel, Nan Tang, Grace Pakeltis, Reece Emery, Ilia N. Ivanov, Dustin A. Gilbert, Philip D. Rack
Summary: The magnetic and optical properties of AuxCo1-x thin films and nanoparticles can be tuned by controlling their chemical composition and morphology. Annealing leads to phase separation and enhances the magnetic properties. The optical properties are greatly influenced by the chemical morphology, where phase separation enhances the quality factor and optical absorption.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Eric S. Muckley, Rama Vasudevan, Bobby G. Sumpter, Rigoberto C. Advincula, Ilia N. Ivanov
Summary: In this study, we have developed an integrated machine-intelligent experimental system that allows simultaneous testing of the electrical, optical, gravimetric, and viscoelastic properties of materials under a programmable dynamic environment. The system is controlled by specially designed software that enables on-the-fly extensive data analysis, real-time iterative feedback, and rapid visualization of experimental results. This system provides a viable platform for AI-centered material characterization and has the potential to accelerate the discovery of multifunctional materials when coupled with an AI-controlled synthesis system.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jason D. Fowlkes, Robert Winkler, Philip D. Rack, Harald Plank
Summary: This article presents an electron dose compensation strategy, called DBEA, to address the structural artifact issue caused by temperature gradient in 3D nanoprinting using focused electron beam-induced deposition. By modulating the electron dose, the deviations caused by temperature variations can be corrected, thus improving the printing accuracy.
Article
Engineering, Chemical
Syed Z. Islam, Md Arifuzzaman, Gernot Rother, Vera Bocharova, Robert L. Sacci, Jacek Jakowski, Jingsong Huang, Ilia Nicolaevich Ivanov, Ramesh R. Bhave, Tomonori Saito, David S. Sholl
Summary: This study presents a scalable and energy-efficient hollow fiber membrane contactor (HFMC)-based process for CO2 capture using a green solvent. The use of deep eutectic solvent (DES) in HFMC allows for effective interaction between DES and CO2, overcoming drawbacks of direct absorption in DES. The research evaluates the performance of commercial low-cost polymer hollow fiber membranes in CO2 capture with DES and provides insights into the CO2 separation mechanism.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
John Lasseter, Philip D. D. Rack, Steven J. J. Randolph
Summary: This study demonstrates the selective growth of high-purity gold films onto nanoscale 3D architectures using the Me2Au (acac) precursor and pulsed laser pyrolytic chemical vapor deposition. The high thermal resistance of the nanoscale geometries enables selective deposition. The effects of laser irradiance, pulse width, and precursor pressure on the growth rate were explored, and feature-targeting resolutions of approximately 100 and 5 μm were achieved using diode lasers coupled to multimode (915 nm) and single mode (785 nm) fiber optics, respectively. Finite element thermal modeling was used to rationalize the experimental results.
Article
Chemistry, Inorganic & Nuclear
Janice L. L. Musfeldt, Zhenxian Liu, Diego Lopez-Alcala, Yan Duan, Alejandro Gaita-Arino, Jose J. Baldovi, Eugenio Coronado
Summary: This study combined diamond anvil cell techniques with synchrotron-based far infrared spectroscopy and first-principles calculations to investigate the vibrational response of Na-9[Ho(W5O18)(2)]middot35H(2)O under compression. The results showed that pressure can control the spectral sparsity and vibronic decoherence pathways by altering the coupling between the vibration modes and the energy levels of Ho3+ ions.
Article
Chemistry, Physical
Lu Yu, Luna Liang, Ishan Bajaj, Kendhl Seabright, David J. Keffer, Ilia N. Ivanov, Hao Chen, Sheng Dai, Arthur J. Ragauskas, Christos T. Maravelias, David P. Harper
Summary: This study utilized a one-step KOH activation method to produce ultra-high mesoporous activated carbons with a surface area of 3207 m2 g-1 and a mesopore ratio of 76%. These activated carbons were used for supercapacitors and methylene blue adsorption, showing promising results in terms of capacitance and adsorption capacity. By adjusting the process conditions, the mesopore ratio of the activated carbons could be controlled. A two-step method was also explored, resulting in different properties but with potential advantages in electrochemical performance. Techno-economic analysis demonstrated the economic viability of the one-step activation-based process.
Article
Education, Special
Jason D. Fowlkes, Robert Winkler, Philip D. Rack, Harald Plank
Summary: 3D nanoprinting using focused electron beam-induced deposition is susceptible to structural distortions caused by temperature gradients. In this study, an electron dose compensation strategy called the Decelerating Beam Exposure Algorithm (DBEA) is proposed to correct for nanowire bending during computer-aided design. The DBEA utilizes an analytical solution derived from 3D nanoprinting simulations to offset undesired heating effects. This compensation strategy has the potential to improve the fidelity of 3D nanoscale printing.
RESEARCH IN AUTISM SPECTRUM DISORDERS
(2023)
Article
Chemistry, Multidisciplinary
Jason D. Fowlkes, Robert Winkler, Philip D. Rack, Harald Plank
Summary: 3D nanoprinting using focused electron beam-induced deposition often results in structural artifacts caused by temperature gradients during the deposition process. Researchers have developed an electron dose compensation strategy to correct for these artifacts and improve the precision of 3D nanoprinting.
Article
Multidisciplinary Sciences
Marti Checa, Addis S. Fuhr, Changhyo Sun, Rama Vasudevan, Maxim Ziatdinov, Ilia Ivanov, Seok Joon Yun, Kai Xiao, Alp Sehirlioglu, Yunseok Kim, Pankaj Sharma, Kyle P. Kelley, Neus Domingo, Stephen Jesse, Liam Collins
Summary: Unraveling local dynamic charge processes is essential for progress in various fields. Researchers have developed high-speed sparse scanning Kelvin probe force microscopy, enabling sub-second imaging of nanoscale charge dynamics and enhancing understanding of material heterogeneities.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Timothy G. Lach, Chinthaka M. Silva, Yufan Zhou, Walker L. Boldman, Philip D. Rack, William J. Weber, Yanwen Zhang
Summary: This study investigates the behavior of two sets of near-equiatomic CoCrCuFeNi thin films under irradiation in different environments. The results demonstrate the influence of composition and environmental exposure on the stability of high entropy alloys under radiation, providing insights into controlling these behaviors.
NPJ MATERIALS DEGRADATION
(2022)