Article
Chemistry, Inorganic & Nuclear
Qianrui Li, Xinle Tian, Jingping Yuan, Di Zhao, Yige Wang, Huanrong Li
Summary: A series of Ag-zeolite luminescent composites were synthesized and their luminescent properties were found to be affected by the zeolite particle size for the first time. The nucleation of silver nanoclusters (AgNCs) was found to be slower in larger zeolites, resulting in smaller nuclearity of AgNCs and significant blue shift in the luminescent color. The composites showed excellent selectivity and sensitivity for discriminative luminescence detection of triethylamine and ethylamine, and also exhibited reversible luminescence response after sensing HAc gas, suggesting potential applications in volatile organic amine detection and information encryption.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yaowei Peng, Xiaoyu Huang, Fu Wang
Summary: Bi-metallic gold/silver nanoclusters with large Stokes shifts were synthesized using a one-pot method. The silver effect in the gold/silver nanoclusters results in strong NIR fluorescence, making it suitable for use as a two-photon fluorescent contrast agent for in vivo bioimaging.
CHEMICAL COMMUNICATIONS
(2021)
Review
Chemistry, Inorganic & Nuclear
Lixuan Dai, Qian Zhang, Qingqing Ma, Weiying Lin
Summary: This review focuses on the application and development of dicyanoisophorone-based fluorescent probes. It covers the historical development, synthetic methods, optical properties, and sensing mechanisms of DCI fluorophores. It also discusses the design strategies and applications for detecting different analytes and provides future perspectives and challenges.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Nicolas A. Grosso-Giordano, Christian Schroeder, Le Xu, Andrew Solovyov, David W. Small, Hubert Koller, Stacey I. Zones, Alexander Katz
Summary: This study investigates the interaction between a molecule and a pore mouth by characterizing the conformation of a macrocyclic calix[4]arene-Ti-IV complex grafted on the external surface of a zeotype. The unique conformation of the complex is detected when grafted at crystallographically equivalent locations, revealing how the surrounding environment controls this confinement. Overall, the study provides insights into the essential intermediate for adsorption processes and demonstrates the sensitivity of the confinement control.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Jianzhong Yu, Song Ye, Yanling Shi, Huazhen Liao, Deping Wang
Summary: In this research, LTA zeolites were synthesized via hydrothermal method and Ag+ ions were introduced to form luminescent Ag-3(n+) nanoclusters under specific heat treatment conditions. The influence of Ag(+) loading and heat treatment on the structure of LTA zeolite was studied using XRD, SEM, and TEM measurements. The emission peak shift and decrease in intensity of Ag-3(n+) nanocluster under exposure to air were attributed to the interaction between nanoclusters and oxidation of silver atoms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Yan-Cai Gao, Chong Wang, Chun-Xia Zhang, Hong-Wei Li, Yuqing Wu
Summary: A controlled method for preparing Au-PtNCs with strong red and NIR emission has been established, which can be used as a novel ratiometric probe for Ag(I). This study provides a new approach for determining Ag(I) with high selectivity and potential application in serum.
Article
Chemistry, Multidisciplinary
Wataru Ishii, Shohei Katao, Yoshiko Nishikawa, Yasuo Okajima, Atsuya Hatori, Masahiro Ehara, Tsuyoshi Kawai, Takuya Nakashima
Summary: Photoirradiation of a pyridine solution of Ag-29 nanoclusters with red photoluminescence at 680 nm activated intense photoluminescence in the near infrared (NIR) region, with a quantum yield of 33% at 770 nm. The use of Au-doped silver nanoclusters further increased the quantum yield to over 45% at 800 nm. Photoirradiation is believed to alter the charge localization in nanoclusters, leading to the formation of sites emitting near infrared light.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Zhiyu Yang, Yifei Zhao, Yayun Zhou, Jianwei Qiao, Yu-Chun Chuang, Maxim S. Molokeev, Zhiguo Xia
Summary: This study successfully designed Eu2+-activated SrY2O4 red phosphor with high photoluminescence quantum efficiency and achieved NIR emission. Tunable emission wavelength can be obtained by doping and modifying the local environment within the phosphor.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Youming Zhang, Jingsheng Miao, Jinfan Xiong, Kai Li, Chuluo Yang
Summary: This research developed dinuclear platinum(II) complexes using N-deprotonated alpha-carboline as bridging ligands for efficient red to NIR emission in doped thin films. The red OLEDs demonstrated high maximum external quantum efficiency (EQE), while the NIR OLEDs showed unprecedented EQE and radiance, with both red and NIR devices exhibiting very small efficiency roll-off at high brightness and appealing operational lifetimes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Mario Gallego, Avelino Corma, Mercedes Boronat
Summary: The reactivity towards O-2 dissociation of Cu-5 and Cu-7 clusters confined within the CHA zeolite cavities is investigated, and it is found that the Si/Al ratio in the zeolite support can finely tune the stability and oxidation properties of Cu-based catalysts.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Hao Xiong, Huiqiu Wang, Xiao Chen, Fei Wei
Summary: Zeolites are nanoporous materials that can selectively adsorb or transform targeted molecules. Understanding the interactions between molecules in zeolites is crucial for designing novel materials and applications. The in situ iDPC-STEM imaging technique provides a method for probing atomic structures and observing adsorption-desorption behaviors of single molecules in zeolites.
Article
Chemistry, Multidisciplinary
Lukasz Baran, Malgorzata Borowko, Wojciech Rzysko, Jakub Smolka
Summary: We use Monte Carlo simulations to investigate the behavior of Janus spheres composed of attractive and repulsive parts confined between two parallel solid surfaces. The adsorption isotherms and the impact of density on morphology are determined. Unique structures such as bilayer and three-layer structures at different distances from the walls are observed. The positional and orientational ordering in these layers are affected by selected parameters, with highly ordered hexagonal lattices formed in some cases.
Article
Chemistry, Physical
Yue Su, Lifang Yuan, Bo Wang, Sijian Wu, Yahong Jin
Summary: This work presents the synthesis of lead-free all-inorganic Mn2+-based perovskite-like single crystals using a designed nonstoichiometric precursor ratio. The special crystal structure enables efficient blue light excitation and red emission from Mn2+, allowing for a good match with commercial blue LED chips and efficient sensitization for Ln3+ emitters. Additionally, the incorporation of Yb3+, Er3+, and Ho3+ enables multiple NIR emissions in CsMnCl3 single crystals. Notably, the Ln3+ NIR emissions exhibit robust thermal-quenching resistance above room temperature, showing (near-) zero thermal-quenching and even anti-thermal quenching.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Huiru Jing, Wenyan Dan, Jiaxing Zhu, Yun Ling, Yu Jia, Yongtai Yang, Xiaofeng Liu, Zhenxia Chen, Yaming Zhou
Summary: A series of isostructural lanthanide phosphonocarboxylate frameworks were synthesized and characterized, exhibiting efficient luminescence emission and fine color tuning. By incorporating different metal ions, the emission properties of the compounds can be significantly enhanced and tuned. This study demonstrates the potential applications of these lanthanide phosphonocarboxylate frameworks in dual emissions of visible and near-infrared light.
DALTON TRANSACTIONS
(2021)
Review
Chemistry, Inorganic & Nuclear
Ya-Lin Qi, Yun-Zhan Li, Ming-Jun Tan, Fang-Fang Yuan, Niren Murthy, Yong-Tao Duan, Hai-Liang Zhu, Sheng-Yu Yang
Summary: In recent years, there has been great interest in the development of organic near-infrared (NIR) ratiometric fluorescent probes. Traditional intensity-based probes lack an internal standard method, resulting in unreliable and inaccurate detection signals as well as an inability to achieve quantitative determination of analytes. Smart dual emission probes with built-in correction ability have overcome the limitations of single channel fluorescent probes and enable reliable quantitative image analysis. Moreover, fluorescent chemosensors in the NIR window offer advantages such as high signal-to-noise ratio, low tissue damage, and deep tissue penetration. The combination of the advantages of ratiometric fluorescent probes and single-intensity-based NIR probes in NIR ratiometric fluorescent probes has led to their widespread application in biomedical research and clinical practice. This review provides a systematic summary of the recent advances (2020-2022) in this field, discussing the design strategies, sensing mechanisms, and bioapplications of these intelligent fluorescent probes. The challenges and prospects in this promising field are also addressed, with the anticipation that this work will inspire the development of organic NIR ratiometric fluorescent probes.
COORDINATION CHEMISTRY REVIEWS
(2023)
Review
Physics, Applied
Minoru Fujii, Hiroshi Sugimoto, Shinya Kano
Summary: This article discusses the development of heavily doped boron and phosphorus core/shell silicon quantum dots, which exhibit significantly different physical and chemical properties compared to undoped quantum dots due to the presence of an amorphous shell. These doped silicon quantum dots can be dispersed in polar solvents such as water and alcohol without the need for organic ligands, and they exhibit stable luminescence in water.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Ceramics
Zixin Wang, Hui Lin, Dawei Zhang, Ruijin Hong, Yanna Tian, Jie Chen, Shengming Zhou
Summary: Ba0.75Al11O17.25 was chosen as the host material for Eu2+ and Mn2+ co-doping, resulting in tunable emission from cyan to green. The phosphor exhibits zero-thermal quenching, high optical transmittance, and thermal conductivity, and when combined with a LED chip, maintains stable luminous efficacy despite thermal effects. This research may lead to new phosphor materials for solid-state lighting applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Saskia Fiedler, P. Elli Stamatopoulou, Artyom Assadillayev, Christian Wolff, Hiroshi Sugimoto, Minoru Fujii, N. Asger Mortensen, Soren Raza, Christos Tserkezis
Summary: Cathodoluminescence spectroscopy in an electron microscope is a versatile tool for analyzing the optical response of plasmonic and dielectric nanostructures. However, the transition radiation produced by electron impact is often neglected. This study demonstrates that transition radiation can generate distinct resonances that interfere constructively or destructively depending on the electron beam's time-of-flight inside the nanosphere, leading to distorted spectra and potentially erroneous modal assignment.
Article
Chemistry, Multidisciplinary
Tatsuki Hinamoto, Yea-Shine Lee, Sina Abedini Dereshgi, Jennifer G. DiStefano, Roberto dos Reis, Hiroshi Sugimoto, Koray Aydin, Minoru Fujii, Vinayak P. Dravid
Summary: Heterostructures of transition metal dichalcogenides and optical cavities have great potential in quantum optics and electronics. In this study, Si@MoS2 core-shells were synthesized and MD mode splitting was experimentally demonstrated, showing evidence for resonance coupling. Additionally, higher-order systems with tunable properties were demonstrated through a dimer system of Si@MoS2.
Article
Materials Science, Multidisciplinary
Hidemasa Negoro, Hiroshi Sugimoto, Tatsuki Hinamoto, Minoru Fujii
Summary: A solution-based bottom-up process is developed to produce one- and two-dimensional arrays of densely packed spherical nanoparticles (NPs) of crystalline silicon (Si), which have the lowest order Mie resonance in the visible range. The arrays are formed using a template-assisted self-assembly method and transferred to an arbitrary substrate. The proper formation of Si NP arrays is demonstrated through polarization-resolved scattering spectra measurements and numerical simulations. The results show strong modification of scattering spectra due to near-field coupling of the electric dipole (ED) modes and the Kerker effect.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Mark K. Svendsen, Hiroshi Sugimoto, Artyom Assadillayev, Daisuke Shima, Minoru Fujii, Kristian S. Thygesen, Soren Raza
Summary: Controlling ultraviolet light at the nanoscale using optical Mie resonances is highly promising. Through first principles calculations and Mie theory evaluation, boron phosphide is identified as a potential material. Experimental results demonstrate that boron phosphide nanoparticles support Mie resonances at visible and ultraviolet wavelengths, and a laser reshaping method is proposed.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Masato Adachi, Hiroshi Sugimoto, Yuya Nishimura, Kenta Morita, Chiaki Ogino, Minoru Fujii
Summary: Inorganic nanoparticles with multiple functions are developed as metal-free nanoprobes capable of scattering/fluorescence dual-mode imaging. They are composed of a silicon nanosphere core and a fluorophore doped silica shell, exhibiting efficient Mie scattering and modified fluorescence spectra. The developed nanoparticles work as scattering/fluorescence dual-mode imaging nanoprobes in the in vitro study of human cancer cells.
Article
Nanoscience & Nanotechnology
Tadasha Jena, Md Tarik Hossain, Upasana Nath, Manabendra Sarma, Hiroshi Sugimoto, Minoru Fujii, P. K. Giri
Summary: In this study, it is discovered that intrinsic defects in 2D palladium diselenide (PdSe2) dendrites can serve as hotspots for high surface-enhanced Raman spectroscopy (SERS) enhancement. The vacancy-rich dendritic PdSe2 demonstrates a SERS enhancement factor >10(5) and can detect RhB at a concentration down to 10(-8) M. The topological defects and edge construction in PdSe2 dendrites contribute to the high enhancement in the SERS signal. This research bridges the gap between conventional plasmonic SERS substrates and plasmon-free SERS substrates.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Physics, Applied
Keisuke Moriasa, Hiroaki Hasebe, Hiroshi Sugimoto, Minoru Fujii
Summary: A structure composed of a hexagonal array of Si nanodisks and a reflecting mirror separated by a SiO2 spacer is proposed for a narrow-band perfect absorption platform in the Si sub-bandgap wavelength range. By adjusting the spacer thickness, narrow-band perfect absorption appears despite a small extinction coefficient. The structure can be used as a narrow-band photodetector in the Si sub-bandgap wavelength range and as an intensity-based refractive index sensor in the near-infrared range.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Akira Matsumori, Hiroshi Sugimoto, Minoru Fujii
Summary: A nanoantenna that can direct light to a specific direction is crucial in various applications in nanophotonics. By controlling the interference between electric and magnetic multipolar modes, directional light scattering by a nanoantenna can be achieved. This study demonstrates both theoretically and experimentally that a small perturbation, such as a notch, on a Mie resonant silicon nanosphere (Si NS) can result in a unique structure that exhibits unidirectional transverse light scattering in the visible range. The mechanism and the generation of a large transverse optical force by a notched Si NS are discussed.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Hidemasa Negoro, Hiroshi Sugimoto, Minoru Fujii
Summary: A colloidal suspension of photonic nanostructures with optical magnetism, called an optical metafluid, consists of high-refractive index dielectric nanospheres with magnetic-type Mie resonances in the optical frequency. Under the Kerker conditions, these nanospheres satisfy the electromagnetic duality symmetry condition and preserve the handedness of circularly polarized light. The helicity-preserving metafluid with these nanospheres enhances the local chiral fields and improves the sensitivity of chiral molecular sensing. In this study, we experimentally demonstrate that a solution of crystalline silicon nanospheres can exhibit both dual and anti-dual behaviors.
Article
Chemistry, Multidisciplinary
Hiroaki Hasebe, Hiroshi Sugimoto, Yoshino Katsurayama, Taniyuki Furuyama, Minoru Fujii
Summary: A photochemical reaction using the excited triplet state of a molecule is developed by utilizing a dielectric metasurface coupled with a photosensitizer, which enhances the S-0→T-1 transition via magnetic dipole transition. This method saves energy compared to the conventional S-0→S-1→T-1 transition. By designing a silicon nanodisk array metasurface with toroidal dipole resonances and functionalizing it with ruthenium complexes, the S-0→T-1 transition rate of the complexes is enhanced. Singlet oxygen generation rate is also enhanced when the toroidal dipole resonance of the nanodisk array matches the S-0→T-1 transition wavelength of the complexes.
Article
Materials Science, Multidisciplinary
Daisuke Shima, Hiroshi Sugimoto, Artyom Assadillayev, Soren Raza, Minoru Fujii
Summary: In this study, colloidal nanoparticles of gallium phosphide (GaP) with high refractive index and low extinction coefficient in the visible range were prepared using mechanical milling and pulsed laser melting. The process resulted in spherical GaP nanoparticles with a smooth surface. The scattering spectroscopy revealed distinctive Mie resonances of dipolar and higher-order modes in the visible range, which were achieved by smoothening the surface through the pulsed laser melting process. Electron energy loss spectroscopy confirmed the presence of the magnetic dipole mode at the Mie resonances. Finally, the Purcell enhancement of fluorescence on the nanoparticle surface due to the Mie resonances was demonstrated.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Izzah Machfuudzoh, Tatsuki Hinamoto, F. Javier Garcia de Abajo, Hiroshi Sugimoto, Minoru Fujii, Takumi Sannomiya
Summary: This study fills the research gap in direct imaging of optical modes by demonstrating nanoscale optical-field visualization of self-interference of light extracted from excited modes through experimentally obtained photon maps that directly portray the field distributions of the excited eigenmodes. By selectively choosing specific modes using cathodoluminescence-based scanning transmission electron microscopy with angle-, polarization-, and wavelength-resolved capabilities, the internal field distributions of the whispering-gallery modes reveal the interference between multiple modes and the resulting complex patterns dependent on the detection angle and polarization. The direct visualization of internal fields enables a comprehensive understanding of WGMs and can provide insights for the design of nanophotonic applications.
Article
Materials Science, Multidisciplinary
Hiroki Kasai, Hiroshi Sugimoto, Minoru Fujii
Summary: It is experimentally demonstrated that narrow-band Purcell enhancement for electric and magnetic dipole emitters can be achieved by high-order Mie resonances up to the magnetic and electric octupole modes of a silicon nanosphere antenna. Eu3+ complexes are attached to the surface of a silicon nanosphere with a diameter of 160 to 316 nm, and the photoluminescence and scattering properties are studied. The resonance wavelength of the silicon nanosphere can be tuned by its size, allowing for wide control of the branching ratio of the D-5(0)→F-7(j) (j = 0-4) f-f transitions of Eu3+.
ADVANCED OPTICAL MATERIALS
(2023)
