Article
Chemistry, Multidisciplinary
Nandan Ghorai, Soumyadip Bhunia, Subham Burai, Hirendra N. Ghosh, Pradipta Purkayastha, Somen Mondal
Summary: This study synthesized and separated C-Dots with different emission peaks and investigated their carrier dynamics to reveal the origin and control mechanism of their fluorescence properties. These findings are of great significance for the design and development of new architectures based on C-Dots.
Article
Materials Science, Ceramics
Lin-Ying Shi, Dan Zhao, Rui-Juan Zhang, Qing-Xia Yao, Wen Liu
Summary: In this study, a new phosphor Ba3MgSb2O9:Mn was successfully prepared by a high-temperature solid-state synthesis method. The Mn-n(+) ions can replace different sites in the structure, exhibiting different emitting intensities at specific temperature ranges. This phosphor can be used as an optical temperature sensor based on the fluorescence intensity ratio of Mn2+ and Mn4+.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Jeanne Heintz, Francesca Legittimo, Sebastien Bidault
Summary: This article proposes using the high local curvatures at the tips of plasmonic nanocubes to achieve strong coupling at visible frequencies. It highlights a trade-off between coupling strength and emission yield in gold nanocube dimers, while silver nanocube dimers exhibit similar coupling strength but higher emission yield, providing design rules for efficient strongly coupled hybrid nanostructures at room temperature.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
M. Naveen Kumar, Deikrisha Lyngdoh Lyngkhoi, Sudhakar Gaikwad, Jayanta Samanta, Rafiq Ahamed, Snehadrinarayan Khatua, Susnata Pramanik
Summary: This paper describes the multi-coloured and white-light emissions observed from pyrene-based hydrazones. The emissions in solution are dependent on the excitation wavelength due to the suppression of Kasha's rule.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Koushik Mondal, Ashim Pramanik, Tapashree Mondal, Sujit Sankar Panja, Rajat Sarkar, Pathik Kumbhakar
Summary: This study reports the aggregation-induced enhancement (AIE) of photo-luminescence quantum yield (PLQY) in the N,N-dimethylformamide (DMF)-stabilized Au nanocluster (AuNC) system, from 12.5% to 51%. The self-assembling of AuNCs and Förster resonance energy transfer (FRET) technique were utilized to design a white LED (WLED) with CIE coordinates of (0.35, 0.29). The performance of the WLED was further improved by optimizing the components and incorporating nitrogen-doped graphene quantum dots (NGQD).
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Hongyu Zhou, Minglian Li, Na Diao, Shaogui Wu, Jiayang Wang, Peize Wu
Summary: In this study, a technique called removing resonance fluorescence (RRF) is introduced for accurate separation of resonance fluorescence and scattered light spectra in light scattering spectroscopy (RLS). The use of MPA-capped quantum dots (QDs) to detect Hg2+ illustrates the implementation of this method. The study provides a useful tool for expanding the application range of RLS.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Yi-Yu Cai, Lawrence J. Tauzin, Behnaz Ostovar, Stephen Lee, Stephan Link
Summary: This article summarizes recent advances in the study of the light emission mechanism of gold nanoparticles, including the impact of changing excitation wavelength and power on the energy distribution of hot carriers and emission spectral lineshape, as well as the role of interband and intraband transitions in the emission lineshape by varying the particle size.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Applied
Andrea Pinto, Marcelo Echeverri, Berta Gomez-Lor, Laura Rodriguez
Summary: The synthesis of three new gold(I) benzothiadiazole derivatives and their light emitting properties were thoroughly investigated in various solvent conditions. The study found that the emission properties can be significantly enhanced by changing the environment conditions, resulting in near unity fluorescence quantum yields.
Article
Materials Science, Multidisciplinary
Yi-Mei Huang, Tse-Ying Chen, Deng-Gao Chen, Hsuan-Chi Liang, Cheng-Ham Wu, Mandy M. Lee, Tien-Lung Chiu, Jiun-Haw Lee, Yu-Cheng Chiu, Pi-Tai Chou, Man-kit Leung
Summary: 35Cbz4BzCN, a novel universal host with long triplet lifetime, can effectively harvest triplet excitons and achieve high efficiency luminescence in combination with different dopants.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Ryuzi Katoh, Kazunari Takahashi, Kosuke Sugawa
Summary: By studying five commercially available TiO2 photocatalysts, it was found that photoluminescence is a minor channel in the photophysical processes of these materials, and luminescence mainly arises from the bulk of the particles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Zhiyong Zheng, Zhenyang Liu, Yanan Ding, Mingjun Chen, Peiwen Lv, Aiwei Tang, Fenghe Wang, Li Guan, Xu Li, Baolai Liang
Summary: In this study, high-quality carbon dots with a quantum yield of 16.2% were successfully synthesized, and structural engineering was utilized to improve the color purity and performance of carbon dots-based light-emitting diodes (CDs-LEDs). The optimized devices exhibited high monochromaticity with a maximum luminance of 681 cd/m(2).
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Bao-Li Chen, Yan-Mei Sun, Hua Xiang, Mu-Xiong Lin, Jian-Han Li, Yong-Liang Huang
Summary: This study reports a novel complex with high luminescence efficiency and thermostability. X-ray crystallography reveals the stability of the complex after heating at 180 degrees C for half an hour. The results indicate high luminescence quantum yields and long lifetimes at different temperatures.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Linghui Shen, Tong Wei, Yongchao Shi, Xiangyu Wang, Liwei Wu, Jiao Cui, Tianyang Zhang, Hongzhi Yu, Zepeng Li
Summary: In this work, a smart phosphor with both upconversion luminescence and photochromic reaction was synthesized, and dual-controlled processes were achieved. The intensity of upconversion luminescence can be reversibly modulated by alternating light or thermal stimulation. The fatigue resistance of upconversion luminescence switching was also demonstrated. These materials have potential applications in optical storage and high-sensitivity optical switches.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Ruihao Ding, Danqing Liu, Yu Feng, Haoxin Liu, Hongrui Ji, Liangcan He, Shaoqin Liu
Summary: Optical imaging has a wide range of applications in the biomedical field, providing visualization of physiological processes and aiding in disease diagnosis and treatment. Unexcited light source imaging technologies, such as chemiluminescence imaging, bioluminescence imaging and afterglow imaging, have gained attention due to their lack of excitation light interference, high sensitivity, and high signal-to-noise ratio. This review highlights the latest advances in unexcited light source imaging technology for biomedical applications, discussing the design strategies of luminescent probes, their applications in various imaging modalities, and the future prospects of unexcited light source imaging for medical applications.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Physics, Applied
Henk F. Arnoldus
Summary: The radiation energy scattered by a small particle travels from the particle to a detector in the far field along the field lines of the Poynting vector. In the case of scattering off a small conducting sphere, only the induced electric and magnetic dipole moments contribute to the emitted radiation. The flow pattern of this energy exhibits numerous singularities, vortices, and closed-loop flows near the particle, with only the net power flowing inward in the far field.
JOURNAL OF APPLIED PHYSICS
(2023)