Article
Chemistry, Multidisciplinary
Xue Bai, Finn Purcell-Milton, Yurii K. Gun'ko
Summary: Cu-Based quantum dots are being explored as a potential replacement for toxic Cd- or Pb-based QDs, with studies focusing on the impact of different reaction conditions on the resulting morphologies and optical properties. By carefully controlling the ZnS shell deposition, researchers have optimized the synthesis of CIZS/ZnS/ZnS QDs and produced highly fluorescent core/shell/shell heterostructured QDs with high PLQYs. Additionally, the successful creation of giant ZnS shell QDs opens up possibilities for further development in this area.
Article
Optics
Shimei Liu, Shulei Li, Yuheng Mao, Zhenxu Lin, Mingcheng Panmai, Guang-Can Li, Lidan Zhou, Sheng Lan
Summary: This study demonstrates the manipulation of exciton dynamics in a heterobilayer by using a Si/Au hybrid nanocavity. The modification of photoluminescence in the embedded heterobilayer is achieved by adjusting the diameter of the Si nanoparticle, which alters the plasmon resonance supported by the nanocavity. The manipulation can be further controlled by shifting the exciton/trion resonance close to or far away from the plasmon resonance through increasing the laser power. The findings highlight the potential applications of dielectric-metal hybrid nanocavities in controlling exciton dynamics and developing new plasmonic devices.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Haorui Dong, Haiyan Zhao, Tongtong Xuan, Wenhao Bai, Tianyu Lin, Yixin Cai, Rong-Jun Xie
Summary: Lead halide perovskite nanocrystals with a perovskite/linear low-density polyethylene (perovskite/LLDPE) core/shell structure were successfully synthesized to achieve high photoluminescence quantum yield (PLQY) and high stability. The improved photoluminescence properties were attributed to the enhanced pressure effect and interaction between ligand and perovskite crystals. The resulting nanocrystals showed high stability under ambient conditions and against UV light, and were used to fabricate white-emitting Mini-LEDs with a super wide color gamut.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Biyun Ren, Bing Chen, Jianxiong Zhao, Yang Guo, Xin Zhang, Xian Chen, Yangyang Du, Zhiqin Deng, Guangyu Zhu, Feng Wang
Summary: Lanthanide-doped ScF3 nanoparticles were synthesized and studied for their thermal enhancement of upconversion, showing a significant increase in emission within a certain temperature range and high temperature sensitivity. The development of new methods may inspire the creation of thermally enhanced upconversion nanoparticles with high emission intensities.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Jiakuan Zhang, Chuyue Li, Jiongzhao Li, Xiaogang Peng
Summary: Size- and shape-controlled CdSe/ZnSe core/shell and CdSe/ZnSe/ZnS core/shell/shell nanocrystals with zinc-blende structure are synthesized. The ligand strain between the inorganic crystal surface and organic ligands plays a key role in ZnSe epitaxy. The lattice strain between the CdSe and ZnSe affects the photoluminescence of CdSe/ZnSe/ZnS core/shell/shell QDs.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Manunya Tepakidareekul, Taro Uematsu, Tsukasa Torimoto, Susumu Kuwabata
Summary: Silver indium sulfide/gallium sulfide (AgInS2/GaSx) core/shell quantum dots (QDs), which possess a narrow band-edge emission and are cadmium-free, have attracted attention. However, their practical application is limited by the insufficient stability of their photoluminescence (PL). In this study, a simple and efficient method using metal-organic frameworks (MOFs) was presented to protect the QDs. The encapsulated QDs maintained their narrow band-edge emission and high stability.
Article
Chemistry, Physical
Hyeong Seop Shim, Minji Ko, Seongkyu Jeong, Seo Yeon Shin, Seung Min Park, Young Rag Do, Jae Kyu Song
Summary: CuInS2 (CIS) quantum dots (QDs) show potential as attractive alternatives to toxic QDs when their quantum yield (QY) becomes comparable. The enhancement of QY in alloyed core/shell structures is attributed to the evolution of electronic structures and suppression of defect states, leading to broad spectral bands and reduced toxicity concerns.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Sui Yang, Wei Bao, Xiaoze Liu, Jeongmin Kim, Rongkuo Zhao, Renmin Ma, Yuan Wang, Xiang Zhang
Summary: Halide perovskites possess remarkable photophysical properties that have led to high-performance lasers, but challenges in emission dynamics and laser size reduction remain. Plasmonic cavities have been used to address these challenges, but limitations still exist due to the trade-off between cavity size reduction and increased losses. The hybrid surface plasmon polaritons (SPPs) coupled with perovskites have shown to significantly reduce loss channels and enhance emission dynamics, paving the way for on-chip ultrafast optoelectronics.
Article
Chemistry, Physical
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Zhenqiang Huang, Xun Hou
Summary: This study investigates the effects of surface ligands with different chain lengths on the electron transfer process in quantum dots, revealing that shorter-chain ligands can improve the efficiency of electron transfer.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Inorganic & Nuclear
Rahul Singh, Syed Akhil, V. G. Vasavi Dutt, Nimai Mishra
Summary: This study investigates the impact of shell thickness on photoinduced electron transfer and photoinduced hole transfer in green-emitting graded alloy core/shell giant quantum dots. It was found that g-QDs with a diameter of approximately 7.14 nm show substantial improvement in charge transfer compared to larger g-QDs, with higher PET and PHT rates.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Da Huang, He Wang, Wei Zhao, Rucheng Dai, Zhongping Wang, Zengming Zhang
Summary: Time-resolved photoluminescence experiments were conducted on MnS/ZnS core/shell quantum dots under high pressure and low temperature conditions. Different emission components were observed and discussed, with exciton emission showing a blue shift with increasing pressure. Furthermore, an enhancement in (MnT1)-T-4((4)G) emission was observed as temperature increased, which was attributed to enhanced energy/charge transfer processes from exciton and ultrafast defects states to Mn ions. This study provides insights into the electronic structure and energy/charge transfer processes of this type of material.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Biochemical Research Methods
Olga A. Goryacheva, K. David Wegner, Aleksandr M. Sobolev, Ines Haeusler, Nikolai Gaponik, Irina Y. Goryacheva, Ute Resch-Genger
Summary: Light-emitting nanoparticles, known as quantum dots (QDs), have great potential for biosensing and bioimaging applications. However, their use in biological systems requires them to be water-dispersible without affecting their optical properties. In this study, researchers developed a new surface silanization method to preserve the optical properties of QDs and successfully prepared water-dispersible QDs.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jing-Yin Xu, Xin Tong, Lucas V. Besteiro, Xin Li, Chenxia Hu, Ruitong Liu, Ali Imran Channa, Haiguang Zhao, Federico Rosei, Alexander O. Govorov, Qiang Wang, Zhiming M. Wang
Summary: By synthesizing a new type of CuInTeSe/CdS g-QDs and regulating their optoelectronic properties through controlling the shell thickness, the research has demonstrated improved photoresponse and stability, laying a foundation for future QD-based optoelectronic technologies.
Article
Chemistry, Physical
Sheng-Ruei Jhang, Hsun-Yen Lin, Yin -Song Liao, Jyh-Pin Chou, Jyh Ming Wu
Summary: This study demonstrates the hydrothermal treatment of core-shell polytetrafluoroethylene (PTFE) nanoparticles decorated with TiO2 (h-PTFE@TiO2). The material exhibits enhanced photocatalytic effect due to the strain-induced local dipole enhancement of the space-charge piezopotential. The h-PTFE@TiO2 nanoparticles show exceptionally high catalytic activity in organic dye degradation.
Article
Chemistry, Analytical
Jing Guo, Xingxu Yan, Mingjie Xu, Govinda Ghimire, Xiaoqing Pan, Jin He
Summary: An effective method has been developed to tune the intensity of surface-enhanced Raman scattering (SERS) of non-electroactive molecules by electrochemical means, involving the formation of nanostructures between Au@Ag core-shell nanoparticles and a gold nanoelectrode. The tuning is achieved by transforming the chemical composition of the thin Ag shell from metallic Ag to insulating AgCl, instead of introducing molecular changes by the electrode potential. The electrode potential can also tune the electromagnetic enhancement (EME) and specific Raman bands associated with Ag-molecule interaction in the Au@Ag nanostructures.
ANALYTICAL CHEMISTRY
(2021)
Article
Energy & Fuels
Onkar S. Shinde, Adinath M. Funde, Shital V. Kahane, Mohit Agarwal, Sandesh R. Jadkar, Shailaja R. Mahamuni, Rajiv O. Dusane, Subhash V. Ghaisas
Article
Optics
Shital V. Kahane, V. Sudarsan, Shailaja Mahamuni
JOURNAL OF LUMINESCENCE
(2017)
Article
Chemistry, Physical
Shital V. Kahane, R. Sasikala, B. Vishwanadh, V. Sudarsan, Shailaja Mahamuni
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Proceedings Paper
Physics, Applied
Shital V. Kahane, R. Sasikala, V. Sudarsan, Shailaja Mahamuni
SOLID STATE PHYSICS: PROCEEDINGS OF THE 58TH DAE SOLID STATE PHYSICS SYMPOSIUM 2013, PTS A & B
(2014)
Article
Nanoscience & Nanotechnology
Shital V. Kahane, Darshana Y. Inamdar, Shailaja Mahamuni
JOURNAL OF NANO- AND ELECTRONIC PHYSICS
(2011)
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)