Article
Engineering, Civil
Xiao-Jun Yao, Yu-Chun Lv, Dong-Sheng Wang
Summary: Accurate identification of modal properties is crucial for structural health monitoring systems. This study proposes a new method for low-energy mode identification by gradually enlarging the relative energy level of low-energy modes. The effectiveness of this method is verified through simulations and experimental data.
Article
Construction & Building Technology
Jinhua Hu, Yingdong He, Qiquan Wang, Boyang Wang, Xiaoli Hao, Nianping Li, Wei Yin, Lifang Liu
Summary: This study compared occupant thermal needs under different heating modes and explored the correlation among ambient environments, occupant responses, and occupant thermal needs. The results showed that the natural ventilation and fee-charged heating modes had similar cool indoor environments, while the fee-free heating mode had a warm indoor environment. Occupants exhibited different adaptive behaviors under different heating modes, and their needed temperatures were similar across modes. The fee-charged heating mode effectively reduced AC-use behaviors and saved energy.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Mathematics, Applied
S. A. Shcherbinin, K. A. Krylova, G. M. Chechin, E. G. Soboleva, S. Dmitriev
Summary: Nonlinear lattices can support delocalized nonlinear vibrational modes (DNVMs) that are exact solutions to the dynamical equations of motion regardless of the lattice point interaction type and amplitude. By considering the space symmetry group of the fcc lattice, all one-component DNVMs can be derived and used to assess the accuracy of interatomic potentials through ab initio and molecular dynamics simulations. The presented family of exact solutions can estimate the accuracy of interatomic potentials for fcc metals at large displacements of atoms.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Thermodynamics
Xing Xiang, Sylvain Patinet, Sebastian Volz, Yanguang Zhou
Summary: Quasilocalized vibrational modes (QVMs) in glassy solids, although known to populate the low-frequency spectrum, have not been well explored in terms of their thermal transport properties. This study demonstrates that the modal thermal conductivity of QVMs is comparable to that of delocalized vibrational modes, indicating that QVMs can be efficient heat carriers. The high thermal exchange performance of QVMs is attributed to the mutual coherence between QVMs and other modes. These findings provide new insights into the thermal transport behavior of QVMs in glassy solids.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Electrical & Electronic
Yue-Ting Tsai, Yu-Hsun Wu, Chu-Chun Wu, Shun-Tung Yen, Gray Lin, Sheng-Di Lin
Summary: This work reveals the operating mechanism and laser modes of semiconductor-based plasmonic crystal lasers (PCLs), emphasizing the essential role of waveguide mode coupling with the surface plasmonic mode. Both simulation and experimental data show that the cooperation of dielectric layers and metallic nano-pillar array provides the required high-quality factor resonant mode. Properly designing the coupling strength is crucial for the functionality of these intriguing devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Mechanical
D. S. Ryabov, G. M. Chechin, E. K. Naumov, Yu. V. Bebikhov, E. A. Korznikova, S. V. Dmitriev
Summary: This paper analyzes all possible one-component delocalized nonlinear vibrational modes (DNVMs) in a square lattice. The DNVMs are obtained solely based on the symmetry of the lattice, thus existing regardless of the particle interactions. The interactions between nearest and next nearest neighbors are described using the beta-FPUT potential. Frequency, kinetic and potential energies of each DNVM are described as functions of amplitude. The paper also presents mechanical stresses caused by DNVMs and the effect of DNVMs on the lattice's stiffness constants. DNVMs with higher vibration frequencies have a stronger impact on the lattice's mechanical properties. Analytical analysis of DNVMs is provided. It is discovered that two out of the sixteen one-component DNVMs can have frequencies above the phonon band across their entire amplitude range. These DNVMs can be used to construct discrete breathers by applying localizing functions. The modulational instability of these two DNVMs leads to the formation of chaotic DBs. The presented results contribute to a better understanding of the nonlinear dynamics of a square lattice by analyzing the properties of a class of delocalized exact solutions and demonstrating their connection with discrete breathers.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Electrical & Electronic
S. Packiaraj, L. Kousalya, A. Pushpaveni, S. Poornima, H. Puschmann, S. Govindarajan
Summary: Molecules with functional groups like amine and carboxyl can promote co-crystal growth, but large differences in pKa values may lead to the formation of salts instead of true co-crystals. A salt with enhanced antioxidant activity was prepared by crystallizing pyrazine-2-carboxylic acid with aminoguanidine, showing the crucial role of the hydrazinic moiety in the aminoguanidinium salt.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Vojtech Chlan, Martin Adamec, Helena Stepankova, Victor G. Thomas, Filip Kadlec
Summary: The behavior of individual molecules of normal and heavy water in beryl single crystals was studied using H-1 and H-2 nuclear magnetic resonance spectroscopy. It was found that water molecules embedded in the beryl voids have a different orientation than previously assumed. This difference is attributed to the molecules attaching to the oxygen atoms in the beryl structural voids through a hydrogen bond. The molecules in the beryl voids exhibit rapid librations around the hydrogen bond axis and less frequent orientational jumps among the possible binding sites.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Thermodynamics
A. Mocciaro, M. S. Conconi, N. M. Rendtorff, A. N. Scian
Summary: The study investigated the effect of adding monoaluminum phosphate on the thermochemical process of kaolinitic clay, finding that it impacts some physical properties of the resulting ceramics without significant changes in macroscopic properties.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Physical
Hunter La Force, Elfi Kraka
Summary: We investigated the bonding characteristics of 18 Ruthenium(II) polypyridyl complexes with the general formula [Ru(tpy)(L)-(Guo)]+, consisting of a tridentate 2,2′:6′,2″-terpyridine ligand (tpy) and various bidentate ancillary ligands L, which can form monofunctional adducts with guanine derivatives such as guanosine (Guo). The basis of our work is inspired by the research conducted by Simovic et al. (2019). These complexes are believed to covalently bond with guanine at the N7 position. This study highlights the significance of our local mode analysis in characterizing the strength of chemical interactions for both experimentalists and theoreticians.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Haotian Qiu, Fuming Li, Congcong Jin, Juanjuan Lu, Zhihua Yang, Shilie Pan, Miriding Mutailipu
Summary: A new metal-free monofluorophosphate with large birefringence and wide band gap was synthesized using the fluoridation strategy and hydrogen bond interaction.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Md Sherajul Islam, Ashraful Hossain Howlader, Rongkun Zheng, Catherine Stampfl, Jeongwon Park, Akihiro Hashimoto
Summary: This study explored the impact of B-10 isotopes and boron or nitrogen vacancies on the vibrational properties of boron nitride nanotubes. The results showed a blue shift of the Raman-active A(1) phonon peak with increasing isotope densities. The presence of mixed or independent B and N vacancies resulted in the emergence of a new low-frequency peak and the annihilation of the A(1) peak in the phonon density of states.
Article
Spectroscopy
Jose Barbosa Silva, Gabriel Costa, Mauricelio Bezerra da Silva, Stefane Nunes Costa, Regina Claudia Rodrigues dos Santos, Francisco Adilson Matos Sales, Antoninho Valentini, Ewerton Wagner Santos Caetano, Valder Nogueira Freire
Summary: The study shows the importance of dispersion-corrected solid-state calculations for describing the vibrational properties of molecular crystals, rather than considering only a single isolated molecule. The GABA monoclinic polymorph reveals valuable information about its vibrational characteristics.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Multidisciplinary Sciences
Ruishi Qi, Ruochen Shi, Yuehui Li, Yuanwei Sun, Mei Wu, Ning Li, Jinlong Du, Kaihui Liu, Chunlin Chen, Ji Chen, Feng Wang, Dapeng Yu, En-Ge Wang, Peng Gao
Summary: Four-dimensional electron energy-loss spectroscopy measurements reveal localized modes at heterointerfaces that impact thermal conductance and electron mobility. Experimental challenges stem from the need to achieve combined spatial, momentum, and spectral resolutions to probe these modes effectively.
Article
Chemistry, Physical
Hui-Chi Lin, Ming-Song Zhang, Wei-Ching Chuang
Summary: This study introduces a gelator-doped liquid crystal smart window with bistable and dynamic modes. The window allows control of transmittance through low voltage and switching between scattering and transparent states using pulse voltage and temperature manipulation.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Chemistry, Analytical
T. H. Kauffmann, M. D. Fontana
SENSORS AND ACTUATORS B-CHEMICAL
(2015)
Article
Physics, Condensed Matter
Rawdha Dekhili, Thomas H. Kauffmann, Hassen Aroui, Marc D. Fontana
SOLID STATE COMMUNICATIONS
(2018)
Article
Instruments & Instrumentation
Ivana Durickovic, Laura Thiebaud, Patrice Bourson, Thomas Kauffmann, Mario Marchetti
APPLIED SPECTROSCOPY
(2013)
Article
Spectroscopy
Kawther Ben Mabrouk, Thomas H. Kauffmann, Hassen Aroui, Marc D. Fontana
JOURNAL OF RAMAN SPECTROSCOPY
(2013)
Review
Chemistry, Analytical
Thomas H. Kauffmann, Marc D. Fontana
SENSORS AND ACTUATORS B-CHEMICAL
(2012)
Article
Spectroscopy
Thomas H. Kauffmann, Ninel Kokanyan, Marc D. Fontana
JOURNAL OF RAMAN SPECTROSCOPY
(2019)
Article
Physics, Condensed Matter
Marc D. Fontana, Ninel Kokanyan, Thomas H. Kauffmann
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Crystallography
V Ottapilakkal, A. Juyal, S. Sundaram, P. Vuong, A. Mballo, L. Beck, G. Nunn, Y. Su, A. Loiseau, F. Fossard, J. S. Merot, D. Chapron, T. H. Kauffmann, J. P. Salvestrini, P. L. Voss, W. A. de Heer, C. Berger, A. Ougazzaden
Summary: The growth of thin hexagonal boron nitride (hBN) films on monolayer graphene using metal-organic vapor phase epitaxy (MOVPE) has been achieved. The BN film has continuous coverage on the graphene surface and shows smooth morphology. This technique shows potential for large-scale production of fully coated hBN-graphene and high-temperature applications.
JOURNAL OF CRYSTAL GROWTH
(2023)
Proceedings Paper
Optics
N. Kokanyan, E. Kokanyan, N. Babajanyan, T. Kauffmann, M. D. Fontana
REFLECTION, SCATTERING, AND DIFFRACTION FROM SURFACES VI
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
K. Ben Mabrouk, T. H. Kauffmann, M. D. Fontana
SENSORS & THEIR APPLICATIONS XVII
(2013)
