Article
Chemistry, Physical
Olga A. Mass, Shibani Basu, Lance K. Patten, Ewald A. Terpetschnig, Alexander I. Krivoshey, Anatoliy L. Tatarets, Ryan D. Pensack, Bernard Yurke, William B. Knowlton, Jeunghoon Lee
Summary: While only one enantiomer of chiral biomolecules performs a biological function, access to both enantiomers has technological advantages. By attaching dyes to a DNA structure, researchers discovered that it is possible to achieve strongly coupled molecular excitons of opposite chirality in solution and achieve exciton chirality inversion by adjusting the length of the linker.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Multidisciplinary Sciences
Di Jia, Murugappan Muthukumar
Summary: Uniformly charged polyelectrolyte molecules usually disperse uniformly in aqueous electrolyte solutions. However, we report a phenomenon where an aqueous solution of positively charged poly(L-lysine) (PLL) exhibits precipitation of similarly charged macromolecules at low ionic strength and a homogeneous solution at very high ionic strength, with a stable mesomorphic state of spherical aggregates as an interlude between these two limits. This unusual behavior is triggered by the presence of a monovalent small organic anion, acrylate, in the electrolyte solution. The findings suggest the importance of dipole-directed assembly and the anti-polyelectrolyte effect in understanding more complex situations such as coacervation and biomolecular condensates.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Analytical
Basina Veera Naveen Kumar, Kankanala Venkata Rao, Esub Basha Shaik, Yerramala Nirmal Rajeev, Kokkirapati Ramachandra Rao, Sandhya Cole
Summary: Bismuth ion (Bi3+) sensitized, europium ion (Eu3+) activated La2Zr2O7 nanophosphors were successfully prepared by a simple wet chemical method. The resulting nanophosphors exhibited color-tunable luminescence properties.
Article
Chemistry, Multidisciplinary
Shuang-Yin Zhu, Dan Zhao, Shao-Jie Dai, Rui-Juan Zhang, Lin-Ying Shi
Summary: This paper synthesized a series of red phosphors NaMg(PO3)(3):xMn(2+) with Mn2+ oxidation state, which exhibited red luminescence suitable for LED backlight display applications. The single oxidation state of Mn2+ was confirmed by XRD, XPS, and PL, and a self-reduction process was suspected to prevent Mn2+ oxidation.
Article
Chemistry, Physical
Olga A. Mass, Christopher K. Wilson, German Barcenas, Ewald A. Terpetschnig, Olena M. Obukhova, Olga S. Kolosova, Anatoliy L. Tatarets, Lan Li, Bernard Yurke, William B. Knowlton, Ryan D. Pensack, Jeunghoon Lee
Summary: This study investigates the influence of dye hydrophobicity on the strength of excitonic coupling in squaraine aggregates templated by DNA Holliday Junction. It shows a strong correlation between squaraine hydrophobicity and the strength of excitonic coupling, with dimers of dichloroindolenine squaraine exhibiting the strongest coupling strength. The research provides insights into how dye structures affect excitonic coupling in dye aggregates templated by DNA, offering guidance for the design of exciton-based materials and devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Analytical
Jun Li, Yingcai Hu, Zuhao Li, Wei Liu, Ting Deng, Jishan Li
Summary: A novel photoactivatable red chemiluminescent AIEgen probe (ACL) was developed, utilizing the combination of a red-emission AIEgen fluorophore and Schaap's dioxetane precursor, allowing for red chemiluminescence through intramolecular chemiluminescence resonance energy transfer. The probe was evaluated in both a clean buffer environment and in living cells and mouse models, demonstrating its potential for in vitro and in vivo hydrazine measurement.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Oleg Dimitriev, Yuri Slominskii
Summary: This study investigates the influence of the thermal properties of the medium on the phenomenon of single-photon hot-band absorption-assisted anti-Stokes photoluminescence (ASPL). The experiments demonstrate a clear correlation between the thermal conductivity and specific heat capacity of the solvent and the quantum yield of ASPL. The findings suggest that selecting a solvent with appropriate thermal properties can help to control the efficiency of one-photon energy upconversion.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Xiongbo Ma, Takatoshi Seto, Yuhua Wang
Summary: This study reports a new phosphor Y2SrAl4SiO12:Ce3+, Cr3+ that exhibits a deep-red emission in the wavelength range of 500-800 nm. By applying this phosphor as an energy down-conversion film on the surface of silicon solar cells, the relative PCE increased by 2.018%. These results highlight the potential of Y2SrAl4SiO12:Ce3+, Cr3+ as an excellent deep-red garnet structured phosphor for enhancing the PCE of solar cells.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Xiongbo Ma, Takatoshi Seto, Yuhua Wang
Summary: This Letter reports a new phosphor Y2SrAl4SiO12:Ce3+, Cr3+ that can effectively enhance the power conversion efficiency (PCE) of crystalline silicon solar cells. By applying the energy down-conversion (EDC) film prepared from Y2SrAl4SiO12:Ce3+, Cr3+ on the surface of the solar cells, the relative PCE increases by 2.018%. These results indicate that Y2SrAl4SiO12:Ce3+, Cr3+ is an excellent deep-red garnet structured phosphor and has a positive effect on the enhancement of the PCE of solar cells.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Xiongbo Ma, Takatoshi Seto, Yuhua Wang
Summary: The power conversion efficiency (PCE) of crystalline silicon solar cells has reached a bottleneck and improving it is currently a significant research topic. This study introduces a new phosphor, Y2SrAl4SiO12:Ce3+, Cr3+, which exhibits deep-red emission in the 500-800 nm range under excitation in the wavelength range of 320-650 nm. The luminescence intensity of Cr3+ is enhanced due to energy transfer from Ce3+ to Cr3+, matching well with the spectrum of silicon solar cells. The application of Y2SrAl4SiO12:Ce3+, Cr3+ energy down-conversion (EDC) films on the surface of silicon solar cells increases the relative PCE by 2.018%.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Amruta Gaikwad, Yatish R. Parauha, S. J. Dhoble, K. V. Dabre
Summary: Recently, Ba3Bi2(PO4)(4) host material doped with rare earth ions showed efficient and thermally stable photoluminescence properties. The phosphors were prepared by conventional solid-state reaction method and characterized by XRD, FTIR, and PL techniques. The results showed that the doped and co-doped phosphors had effective excitation in the near UV and blue region. The spectral tuning and color variation were achieved by doping with Dy3+, Eu3+, and La3+ ions, making it a suitable candidate for phosphor converted-LED applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
LianJie Li, JunYu Chen, XiuSha Peng, ShuJun Xu, RongFei Wei, Hai Guo
Summary: White light-emitting diodes (W-LEDs) play an important role in human life. However, the lack of red-light emission phosphors in packaged W-LEDs results in high color temperature and low color rendering index. In this study, red luminescent Bi3+ and Eu3+ doped Lu2WO6 phosphors were manufactured and investigated for their structural and luminescent properties. The results show that Lu2WO6:Bi3+, Eu3+ samples have promising applications in solid-state lighting, with favorable thermal stability and efficient energy transfer processes.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Myung-Ho Choi, Tae Hwan Moon, Yunseung Kuk, Kang Min Ok
Summary: Reported here is the green and red photoluminescence of two manganese bromide complexes derived from different secondary interactions of aminomethylpyridine isomers. The two positional isomers, 4-amino-3-methylpyridine and 3-amino-5-methylpyridine, produce protonated forms under acidic conditions, forming different hydrogen bonding networks and resulting in different coordination environments. Single-crystal structure analysis revealed different manganese halide units emitting light in the green and red regions.
INORGANIC CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Necda Cam, Umit Akinci
Summary: The effect of dipolar interaction strength on the dynamical hysteresis behavior of the nanodisk system was systematically investigated. Different hysteresis characteristics were observed for the in-plane and out-of-plane magnetization components.
Article
Engineering, Multidisciplinary
Lingyue Shen, Ping Lin, Zhiliang Xu, Shixin Xu
Summary: This study presents a phase-field model for simulating the behavior of multicellular systems in a bounded spatial domain under flow conditions. The model incorporates a multi-dimensional Lennard-Jones potential to account for intercellular repulsion and adhesion. A second-order accurate C0 finite element method is used to solve the governing equations while preserving energy law. The validity of the model is established through numerical tests and experimental data from cell stretch tests, and the impact of varying adhesion properties in red blood cells is investigated. Overall, this work provides a thermodynamically consistent and computationally efficient framework for simulating cell-cell and cell-wall interactions under flow conditions.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
