Article
Nanoscience & Nanotechnology
Yi-Ting Tsai, Natalia Majewska, Mikolaj Kaminski, Bi-Hsuan Lin, Sebastian Mahlik, Mu-Huai Fang
Summary: This study investigates the distribution of multivalent chromium ions in doped inorganic materials using various techniques. The results reveal the aggregation of Cr6+ ions within the sample and the even distribution of Cr3+ ions, and provide an analysis of the electron-lattice interactions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Yi Xiang, Shanshan Zheng, Shanshan Yuan, Jing Wang, Yihan Wu, Xiaohui Zhu
Summary: In this study, photoswitchable upconversion nanoparticles (UCNPs) that can release orthogonal emissions under two near-infrared light excitations were reported. The accuracy of upconversion luminescence signals under different excitation lights was verified using Pearson's correlation analysis. A near-infrared mediated bioimaging nanoplatform was designed to generate reactive oxygen species (ROS) and track the location of upconversion photosensitizers simultaneously. The study not only depicts the migration pathway of upconversion photosensitizers but also demonstrates the organelle escape of these nanoparticles via photochemical internalization (PCI) process.
Article
Materials Science, Ceramics
Ping Li, Liuyong Zhao, Song Wang, Xiaohui Zhang, Huaiyuan Jiang, Ruizhen Liu, Nengchuang Zhao, Jian Cheng, Caili Xu, He Zhao, Renliang Lyu
Summary: This study successfully synthesized rare-earth ions doped upconversion luminescent microparticles using the impinging stream method, optimizing the conditions to achieve high yield and good monodispersity of the particles.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Biophysics
Mingming Yin, Chuwei Liu, Rui Ge, Yu Fang, Jie Wei, Xi Chen, Quansheng Chen, Xiaomei Chen
Summary: In this study, a near-infrared-responsive photoelectrochemical sensing platform was developed for ultrasensitive detection of E. coli O157:H7. By assembling different nanomaterials, the sensor achieved specific capture and determination of E. coli with the recognition element of an antimicrobial peptide.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Materials Science, Ceramics
Xin Li, Jiangkun Cao, Mokang Huang, Mingying Peng
Summary: Bismuth (Bi) doped glasses and fibers have gained attention for their broad and long lived near infrared (NIR) emission. Codoping rare earth ions is a feasible way to modulate the NIR emission properties of Bi, but limited success have been achieved. By investigating nonactive rare earth (RE) codoped aluminoborate glasses, it is found that the addition of nonactive RE ions changes the glass structure and optical basicity, altering the optical properties of Bi.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Yu Miao, Cui Kaimin, Tian Qihang, He Guangyuan, Xie Jun, Zhang Jihong
Summary: Nd3+ and Er3+ ions doped chalcohalide glass samples were prepared via melt-quenching method and heat treated for different durations. The effect of heat treatment on the luminescence and lifetime of Nd3+ and Er3+ ions was investigated. It was found that Ga2S3 nano-crystals formed in the glass matrix after 10 hours of heat treatment, which led to changes in the luminescence and lifetime of Nd3+ and Er3+ ions. This research provides insights into the crystallization mechanism and processes of rare earth doped chalcohalide glass.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2022)
Article
Chemistry, Applied
Wei Xu, Xin Zhu, Di Zhao, Longjiang Zheng, Fengkai Shang, Zhiguo Zhang
Summary: This study presents a luminescence ratiometric thermometry technique that achieves high sensitivity and low measurement uncertainty by using a mixture of phosphors and optimizing the dopant concentration of rare earth ions, showing great potential in temperature measurement.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Physical
Ligan Ma, Fumin Lu, Qingqing Yu, Peican Dai, Fangfang Hu, Hai Guo, Rongfei Wei
Summary: In this study, novel Y2-XScXGa1-ySbO7:yCr3+ phosphors were successfully prepared for near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs). The optimization of the phosphor's luminescence performance led to improved NIR output power and photoelectric conversion efficiency. Additionally, a dual-mode luminescent thermometry based on the broadening of full width at half-maximum (FWHM) and the rapid attenuation of fluorescent lifetime (FL) was constructed. These findings demonstrate the potential application prospects of Y2-XScXGaSbO7:Cr3+ in NIR pc-LEDs and optical thermometry.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Sasank Pattnaik, Manisha Mondal, Lakshmi Mukhopadhyay, Susmita Basak, Vineet Kumar Rai, Rajiv Giri, Vijay Singh
Summary: Er3+-Yb3+ co-doped NaGd(MoO4)(2) phosphors with different concentrations of Er3+ and Yb3+ ions were successfully synthesized via a high-temperature solid-state reaction method. The prepared phosphor showed intense green upconversion emission even at low pump power and demonstrated good thermometric properties using the Stark sublevels of Er3+ ions. The phosphor can act as a temperature probe with reliable sensing ability and excellent thermal stability.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Peipei Dang, Guodong Zhang, Wei Yang, Hongzhou Lian, Guogang Li, Jun Lin
Summary: Combining rare-earth ions with halide perovskites can produce interesting optical properties in the visible and NIR regions. In this study, RE3+ ions (RE: Nd, Ho, Er, Tm) were successfully introduced into Cs4Cd1-wMnwBi2Cl12 quadruple perovskites through a hydrothermal method. The materials exhibited characteristic emission of RE3+ in the red and NIR regions via constructing a Mn2+ energy bridge. The energy transfer processes and mechanism were confirmed, and an evolution process from direct to indirect band gaps was verified.
CHEMISTRY OF MATERIALS
(2023)
Review
Optics
Fangyi Zhao, Zhen Song, Quanlin Liu
Summary: This review discusses the effect of crystal field on the luminescence of Cr3+/Cr4+ and outlines the research progress of Cr3+/Cr4+-doped NIR luminescent materials. It summarizes the luminescence properties of these materials and lists strategies for tuning emission wavelength, broadening emission band, enhancing NIR luminescence efficiency, and improving thermal stability. Finally, it presents the current challenges and future prospects in the research of Cr3+/Cr4+-doped NIR luminescent materials.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
A-Ra Hong, Ji-Hoon Kyhm, Gumin Kang, Ho Seong Jang
Summary: In this study, rare-earth ion-doped upconversion nanophosphors capable of full-color tunability were reported. These nanophosphors emit blue, green, and red light under different wavelengths, achieving a wide color gamut with rich colors.
Article
Chemistry, Inorganic & Nuclear
Xiao-Min Zhang, Jiao Yin, Hong-Ling Gao, Jian-Zhong Cui
Summary: Five new multi-nuclear rare earth complexes were synthesized using a Schiff base ligand and co-ligand Hdbm. Among them, Complex 2 exhibits single-molecule magnet behavior, while Complex 1, 3, 4, and 5 emit characteristic emission peaks of NdIII ions, HoIII ions, ErIII ions, and YbIII ions, respectively.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Haibo Xu, Gongxun Bai, Kun He, Shixu Tao, Zhanling Lu, Yang Zhang, Shiqing Xu
Summary: This study successfully synthesizes NIR phosphor LaGaO3: Nd/Cr with excellent temperature sensing performance and anti-thermal quenching performance. The prepared NIR pc-LED shows good performance in terms of photoelectric conversion efficiency and NIR output power. By using the prepared NIR pc-LED as a light source, the distribution of blood vessels and bones in human palms can be observed.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Jun Du, Jinliang Liu, Ying Chen, Yuefeng Zhao, Yuhao Li, Yuqing Miao
Summary: A fast and facile preparation strategy for bismuth-based upconversion nanomaterials has been reported, which improves the crystallinity and upconversion luminescence intensity. The temperature measurement range has also been extended by optimizing the doping ratio and adjusting the synthetic solvent strategy. This method provides a feasible strategy for the construction of novel fluorescent temperature probes.
Article
Optics
Maho Takematsu, Masakazu Umezawa, Toshihiro Sera, Yuichi Kitagawa, Hiroyuki Kurahashi, Shuta Yamada, Kyohei Okubo, Masao Kamimura, Hideo Yokota, Kohei Soga
Summary: This study evaluated the influence of the difference in refractive index between the sample body and the surroundings on fluorescence CT results. It was found that refraction can cause the brightest fluorescent point to deviate from the correct point. The speculated position can be determined by immersing the body in an RI matching liquid.
Article
Chemistry, Multidisciplinary
Thi Kim Dung Doan, Masakazu Umezawa, Hisanori Kobayashi, Atsushi Oshima, Kazuno Ikeda, Kyohei Okubo, Masao Kamimura, Kohei Soga
Summary: Fluorescence imaging in the over-thousand nanometer NIR wavelength region is a new technique for real-time bioimaging. The investigation showed that the OTN-NIR probe based on DSPE-PEG micelles is unstable in albumin and PBS solutions, but remains stable in water and saline.
Article
Biochemistry & Molecular Biology
Kenta Yokoi, Kohei Yamaguchi, Masakazu Umezawa, Koji Tsuchiya, Shin Aoki
Summary: The study investigates the mechanisms of paraptosis induction in cancer cells by describing the effects of an inhibitor and two substances. The findings suggest that paraptosis can be triggered through membrane fusion between mitochondria and the endoplasmic reticulum, calcium influx from the ER to mitochondria, and a decrease in mitochondrial membrane potential.
Article
Biochemical Research Methods
Kohei Yamaguchi, Kenta Yokoi, Masakazu Umezawa, Koji Tsuchiya, Yasuyuki Yamada, Shin Aoki
Summary: In this study, triptycene-peptide hybrids were designed and synthesized, and it was found that certain compounds with conjugated structures induced a new type of cell death called paraptosis in leukemia T-lymphocytes. Mechanistic studies revealed that these compounds induced a series of cellular processes leading to paraptosis.
BIOCONJUGATE CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Kohta Nambu, Taisuke Kitaoka, Koji Morita, Kohei Soga, Tomoharu Tokunaga, Takahisa Yamamoto, Hiroshi Masuda, Hidehiro Yoshida
Summary: In this study, flash joining experiments were conducted using an AC field on 3 mol% Y2O3-stabilized tetragonal ZrO2 polycrystal (Y-TZP) bodies. The necessary conditions for achieving almost complete self-joining of Y-TZP bodies were clarified. By applying an AC field at specific conditions, successful joining with 92% of the flexural strength of the as-sintered Y-TZP body was achieved.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Biomedical
Naoaki Mikami, Ikuo Yonemitsu, Hiroshi Takemura, Mark Kondou, Kouhei Soga, Kazuhiro Suga, Zuisei Kanno, WeiJen Lai, Motohiro Uo, Takashi Ono
Summary: The purpose of this study was to demonstrate the forces and moments exerted on adjacent brackets using improved superelastic Nickel-Titanium alloy wire (ISW) to close and align extraction spaces simultaneously. The results showed that the ISW generated sufficient moments with the addition of V-bends to close the space by bodily movement.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Thi Kim Dung Doan, Masakazu Umezawa, Ikeda Kazuno, Kazunobu Ohnuki, Mizuki Akatsuka, Kyohei Okubo, Masao Kamimura, Masayuki Yamaguchi, Hirofumi Fujii, Kohei Soga
Summary: We developed a small MRI/NIR-II probe for HER2 breast cancer cells. The probe contains PLGA-b-PEG micelles encapsulated with NIR-II and Gd-DOTA conjugated at the border of PLGA/PEG. Herceptin is then conjugated to carboxyl residues of PLGA-b-PEG chains. Through binding assays, we found that the optimal surface ratio of -COOH is 5% for stable probe properties and high antigen-capturing activity.
ACS APPLIED BIO MATERIALS
(2023)
Article
Engineering, Biomedical
Thi Kim Dung Doan, Masakazu Umezawa, Kyohei Okubo, Masao Kamimura, Kohei Soga
Summary: Micelles have been widely used in biomedicine as potential carriers of hydrophobic fluorescent dyes. However, their lack of stability in physiological environments limits their imaging utility. In this study, the stability of micelles was improved by introducing Gd3+ and DOTA, resulting in enhanced fluorescence intensity and stability in physiological environments.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2023)
Article
Biochemical Research Methods
Tomohiro Mitsui, Akino Mori, Toshihiro Takamatsu, Tomohiro Kadota, Konosuke Sato, Ryodai Fukushima, Kyohei Okubo, Masakazu Umezawa, Hiroshi Takemura, Hideo Yokota, Takeshi Kuwata, Takahiro Kinoshita, Hiroaki Ikematsu, Tomonori Yano, Shin Maeda, Kohei Soga
Summary: In this study, near-infrared hyperspectral imaging was used to accurately identify the exposed and unexposed areas of gastric cancer, with a high prediction accuracy. Additionally, areas with tumor thickness greater than 2 mm were more easily identifiable.
JOURNAL OF BIOMEDICAL OPTICS
(2023)
Article
Materials Science, Ceramics
Daichi Morikawa, Kohta Nambu, Koji Morita, Hidehiro Yoshida, Kohei Soga
Summary: The impact of electric field/current on creep deformation in fine-grained 8 mol% Y2O3 stabilized cubic ZrO2 was investigated under direct and alternative current conditions. The acceleration effect caused by electric fields/currents, which cannot be explained by the increase in sample temperature due to Joule heating, is more significant in AC than in DC conditions. The deformation mechanism changes from diffusional creep to grain boundary sliding (GBS) under DC and AC, indicating that the athermal effect of electric field/current enhances GBS and its rate controlling process of cation diffusivity, especially in AC.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Ye Chen, Kyohei Okubo, Konstantinos Slavakis, Yoshitaka Kitamoto
Summary: This study proposes a method for estimating the distribution of magnetic nanoparticle (MNP) clusters from recorded AC magnetization spectra using an experimental-based model, and successfully applies it to biosensing.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)