Article
Chemistry, Physical
Aliaksandra Radchanka, Varvara Hrybouskaya, Andrey Iodchik, Alexander W. Achtstein, Mikhail Artemyev
Summary: In this study, the researchers found that by varying the surface charged groups on CdSe/ZnS QDs, the zeta-potential can be tuned to control the quantum yield of emission and the recombination dynamics. The presence of zwitterionic surface groups allows for pH tuning of the zeta-potential and quantum yield.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Yanbing Lv, Yucheng Yuan, Ning Hu, Na Jin, Dangdang Xu, Ruili Wu, Huaibin Shen, Ou Chen, Lin Song Li
Summary: This study presents a synthesis method for ultra-thick shell quantum dots and their application in C-reactive protein detection, achieving nearly a 3-fold enhancement in detection sensitivity and a 2-fold increase in shelf life. The performance improvements in protein detection are attributed to the use of core/shell quantum dots with high particle stability, high PL QYs, and a large surface area conducive to surface antibody coupling.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Bin Bin Jin, Shu Ying Kong, Guo Qing Zhang, Xing Qiao Chen, Hong Shan Ni, Fan Zhang, Dan Jun Wang, Jing Hui Zeng
Summary: The study focuses on inhibiting interfacial charge recombination in CdSe QDSSCs by constructing a ZnS/QDs/ZnS double-layer barrier structure and applying an electric field in VASILAR, achieving higher efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Seon Woo Ahn, Minji Ko, Soyeon Yoon, Jun Hwan Oh, Yoonji Yang, Se Hak Kim, Jae Kyu Song, Young Rag Do
Summary: The use of triply protected approaches has successfully improved the photoluminescence quantum yield and environmental stability of QDs. The QD-embedded microbeads have optimized the uniform distribution of QDs, enhancing the luminous efficacy of color-by-blue QD displays.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Huu Tuan Nguyen, Anh Tuan Duong, Soonil Lee
Summary: We present a new and easy method to enhance the performance of LEDs by using a multilayer colloidal CdSe@ZnS quantum dots (QDs) deposited with layer-by-layer spin-coating and 1,2-ethanedithiol (EDT) solid state treatment to form an emissive layer (EML). The EDT treatment promotes the formation of multi-QD layers in LEDs and passivates the QD surface, leading to modified charge injection properties in QD-LED devices. The best performance was achieved with a double-QD layer device, resulting in a maximum luminous yield of 3.64 cd/A, which was 23 times higher than a control device with a single-QD layer without EDT treatment.
Article
Nanoscience & Nanotechnology
Wanzhen Li, Ping Song, Ying Xin, Zhao Kuang, Qin Liu, Fei Ge, Longbao Zhu, Xuguang Zhang, Yugui Tao, Weiwei Zhang
Summary: The study demonstrated that loading AP on CdSe NPs resulted in higher water solubility, bioavailability, and antibacterial effect compared to raw AP. AP-CdSe NPs showed strong antibacterial activity against multidrug-resistant bacteria both in vitro and in vivo. The findings are helpful for the design and development of antibacterial treatment strategies based on AP.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2021)
Article
Energy & Fuels
Zhiheng Xu, Zhengrong Zhang, Kelum A. A. Gamage, Yunpeng Liu, Huangfeng Ye, Xiaobin Tang
Summary: The feasibility of using CdSe/ZnS quantum dots to enhance the performance of liquid scintillator radioluminescent nuclear batteries was studied, with the peak position of radioluminescence emission spectra regulated by controlling QD components. This method is suitable for achieving satisfactory spectral matching between fluorescence materials and photovoltaic devices to increase battery output performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Honyeon Lee, Dongjin Kim
Summary: This study presented a numerical simulation of quantum dot energy levels based on perturbation theory. The results showed that the behavior of quantum dots could be reliably investigated by considering the core diameter and external electric field intensity. In addition to energy levels and light emission wavelengths, the spatial distributions of wavefunctions were obtained, which can contribute to the development of high-performance quantum dot technologies.
Article
Spectroscopy
Yan-Fei He, Jian-Wei Chen, Chang-Zhi An, Xiao-Lin Hou, Zi-Tao Zhong, Chao-Qing Li, Wei Chen, Bo Liu, Yuan-Di Zhao
Summary: In this study, CdSe/ZnS quantum dots with a particle size of 5.5-9.3 nm were successfully synthesized, showing fluorescence emission ranging from 545-616 nm. The water-soluble QD dispersion system remained liquid under freezing conditions at -20 degrees C with a fluorescence intensity increase and a quantum yield of 79% at -20 degrees C. Utilizing QDs, effective labeling of hepatic sinusoid endothelial cells was achieved with a labeling efficiency as high as 97%, indicating promising applications in microscopic liver section tomography.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Xiang-Bing Fan, Dong-Wook Shin, Sanghyo Lee, Junzhi Ye, Shan Yu, David J. Morgan, Adrees Arbab, Jiajie Yang, Jeong-Wan Jo, Yoonwoo Kim, Sung-Min Jung, Philip R. Davies, Akshay Rao, Bo Hou, Jong Min Kim
Summary: InP quantum dots (QDs) are being studied as a less toxic alternative to Cd-based QDs. Aminophosphine and H2S are used to eliminate defects and reconstruct the interface between InP and ZnS, resulting in enhanced photoluminescence (PL). H2S etching can also control the size of the InP core, allowing for the production of wide band gap InP-based QDs with blue emission.
NANOSCALE HORIZONS
(2023)
Article
Engineering, Environmental
Yonghui Lee, Dong Sik Kim, Sang Woo Jin, Hanchan Lee, Yu Ra Jeong, Ilhwan You, Goangseup Zi, Jeong Sook Ha
Summary: In this study, a stretchable QD-LED array was fabricated for displaying body movement and skin temperature signals from skin-attached sensors. The design minimized strain on the QD-LEDs by concentrating stress on the soft elastomer film substrate and Galinstan interconnections, resulting in stable operation under deformation. This work demonstrates the potential application of stretchable QD-LED arrays for easy and daily monitoring of health conditions through visual display.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Micaih J. Murray, Matthew M. Jones, Dean R. Peterman, Sharon L. Neal
Summary: The impact of 60Co gamma irradiation on the photoluminescent properties of CdSe/ZnS semiconductor quantum dots in toluene was investigated. The emission of the quantum dots consisted of three components that changed with increasing gamma ray exposure. QD degradation was accelerated in samples with appreciable headspace, and the formation of larger particles was observed. Dynamic light scattering measurements corroborated these findings.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Kyeong-Min Ham, Minhee Kim, Sungje Bock, Jaehi Kim, Wooyeon Kim, Heung Su Jung, Jaehyun An, Hobeom Song, Jung-Won Kim, Hyung-Mo Kim, Won-Yeop Rho, Sang Hun Lee, Seung-Min Park, Dong-Eun Kim, Bong-Hyun Jun
Summary: A Cd-free quantum dot nanoprobe for bioimaging was fabricated by embedding multiple indium phosphide/zinc sulfide quantum dots onto silica templates and coating them with a silica shell. The resulting nanoparticles exhibited excellent optical properties and hydrophilicity, and showed prominent fluorescence signals in tumors, demonstrating their potential for bioimaging applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Kai Li, Ying Ye, Wenchao Zhang, Yuzhou Hu, Ying Yang, Yao Zhou, Chao Liu
Summary: Nontoxic cadmium-free ZnS and ZnSe QDs with high quantum efficiency have attracted significant attention for information displays, but their applications are limited due to short emission wavelength and low PL QY. Doped ZnS QDs embedded in glass showed improved PL QY from 2.2% to 16.8% with dual-band photoluminescence, indicating the effectiveness of co-doping trivalent and divalent ions in ZnX QDs for high color rendering index single-component WLED.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Analytical
Mijin Kim, Dongjin Kim, Ohun Kwon, Honyeon Lee
Summary: The reliable manufacture of flexible transparent electrode is important for the fabrication of high-performance, flexible QLEDs. In this study, we deposited a transparent oxide/metal/oxide (OMO) electrode on a polymer planarization layer and achieved good electron supply and injection. The high-performance flexible QLEDs fabricated using these electrodes had significantly higher current efficiency than rigid QLEDs with ITO electrodes.
Article
Energy & Fuels
Heri Hermansyah, Anggraini Ratih Kumaraningrum, Julwan Hendry Purba, Edison, Masafumi Yohda
Article
Biochemistry & Molecular Biology
Ayane Terada, Daisuke Komatsu, Takahiro Ogawa, Darin Flamandita, Muhamad Sahlan, Minoru Nishimura, Masafumi Yohda
Summary: Hydrogen cyanide is an industrially important chemical with an annual production exceeding 1.5 million tons, causing environmental problems due to its toxicity in cyanide-containing effluents. Biological degradation is a promising method for treating contaminated soils or water. Bacillus sp. EBE-2, isolated from soil contaminated with cyanide, shows high cyanide-degrading ability and potential for remediation of cyanide-contaminated water or soil. By cloning a nitrilase gene from Bacillus sp. EBE-2, Bacillus nitrilase was expressed and exhibited cyanide-degrading activity, likely functioning as a cyanide hydrolase, with its structure and catalytic site studied through homology modeling and molecular docking simulation.
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Yosuke Inoue, Yuya Hanazono, Kentaro Noi, Akihiro Kawamoto, Masato Kimatsuka, Ryuhei Harada, Kazuki Takeda, Ryoichi Kita, Natsuki Iwamasa, Kyoka Shibata, Keiichi Noguchi, Yasuteru Shigeta, Keiichi Namba, Teru Ogura, Kunio Miki, Kyosuke Shinohara, Masafumi Yohda
Summary: A study on CtHsp104 revealed that in the presence of ADP, it assembles into a left-handed spiral filament with a hexamer of split spiral structures. Staggered and split hexameric rings were observed in cryo-EM images, and substrate addition was found to enhance the conformational change and increase the frequency of the split structure.
Article
Biochemical Research Methods
Mitsuki Miyagi, Sotaro Takiguchi, Kazuaki Hakamada, Masafumi Yohda, Ryuji Kawano
Summary: The EXP2 nanopore has been shown to detect poly-L-lysine with single-molecule sensitivity and sufficient resolution to differentiate between two individual PLLs of different molecular weights. Exploring biological nanopores suitable for peptide sensing is key to achieving amino acid sequence determination.
Article
Biochemistry & Molecular Biology
Nina Kurokawa, Rio Midorikawa, Manami Nakamura, Keiichi Noguchi, Ken Morishima, Rintaro Inoue, Masaaki Sugiyama, Masafumi Yohda
Summary: The study examined the oligomeric structural change of CgHspB1 using sedimentation velocity analytical ultracentrifugation. It was found that at low temperatures, CgHspB1 exists as an 18-mer and is relatively unstable, partially dissociating into smaller oligomers. At elevated temperatures, the 24-mer is more stable and in dynamic equilibrium with the dissociated oligomers in the hexameric unit. Additionally, the disulfide bond between conserved cysteine residues plays a role in stabilizing the hexamers.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Yosuke Fukutani, Yuko Nakamura, Nonoko Muto, Shunta Miyanaga, Reina Kanemaki, Kentaro Ikegami, Keiichi Noguchi, Ikuroh Ohsawa, Hiroaki Matsunami, Masafumi Yohda
Summary: Vertebrate animals detect odors through olfactory receptors, but the studies of their odor molecule recognition mechanisms have been hindered by the difficulty in their expression in heterologous cells. However, this study found that a single amino acid substitution in conserved amino acid residues of RTP-independent ORs can significantly improve their functional expression in heterologous cells.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Instruments & Instrumentation
Yosuke Fukutani, Tomoyo Koshizawa, Masafumi Yohda
Summary: Flavors are composed of a combination of various odor molecules, and animals sense them through multiple odorant receptors. The vapor phase stimulation method can mimic authentic olfactory responses and has the potential to identify receptors that respond to specific odors.
SENSORS AND MATERIALS
(2021)
Article
Chemistry, Analytical
Tomoya Yoshii, Ikumi Takayama, Yosuke Fukutani, Takashi Ikuta, Kenzo Maehashi, Masafumi Yohda
Summary: An olfactory receptor, cOR52, was successfully expressed using a wheat germ cell-free synthesis system and immobilized on a graphene field-effect transistor. It showed ligand-specific response and holds potential for developing odorant sensors with other olfactory receptors.
ANALYTICAL SCIENCES
(2022)
Review
Biotechnology & Applied Microbiology
Hideyuki Kurata, Tetsuya Ishino, Yasuhiro Ohshima, Masafumi Yohda
Summary: The biopharmaceutical CDMO is an important business model that helps pharmaceutical companies develop and manufacture production processes. By analyzing the foundry business and reviewing new technologies, the success factors of CDMO can be identified.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Masashi Tanaka, Noriyuki Kataoka, Haruya Kobayashi, Masaya Fujioka, Masaru Oda, Aishi Yamamoto, Kensei Terashima, Junji Nishii, Hiromi Tanaka, Takayoshi Yokoya
Summary: The superconducting properties of layered titanium nitride chloride were investigated, and it was found that the treatment temperature and hydrogen incorporation have significant effects on the superconductivity.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Biochemistry & Molecular Biology
Ryosuke Inoue, Yosuke Fukutani, Tatsuya Niwa, Hiroaki Matsunami, Masafumi Yohda
Summary: Olfactory receptors (ORs) in olfactory sensory neurons mediate olfaction and require the assistance of receptor-transporting proteins (RTPs) for functional expression. This study examined the interactome of RTP1S and OR using proximity biotinylation and revealed the involvement of HSPA6 and STAU2 in the trafficking process of OR through interaction with RTP1S.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Masako Takatsu, Kunihiko Morihiro, Honoka Watanabe, Mizue Yuki, Takara Hattori, Kentaro Noi, Kohsuke Aikawa, Keiichi Noguchi, Masafumi Yohda, Takashi Okazoe, Akimitsu Okamoto
Summary: This study analyzed the cellular properties of DNA conjugates modified with perfluorocarbons (PFCs) and found that DNA conjugates with two or more PFC-containing units can penetrate cell membranes without causing damage. Furthermore, the modified DNA showed similar cell penetration and non-toxicity across different human cell lines, suggesting its potential as a nucleic acid delivery platform.
ACS CHEMICAL BIOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Tatsuhiro Furuta, Keisuke Hamada, Masaru Oda, Kazuma Nakamura
Summary: We present a hidden Markov model analysis for fluorescent time series of colloidal quantum dots. The model introduces a hidden variable to eliminate artifacts caused by noise in the fluorescent data, improving the estimation accuracy of the light-emission duration.
Meeting Abstract
Biophysics
Mitsuki Miyagi, Sotaro Takiguchi, Kazuaki Hakamada, Masafumi Yohda, Ryuji Kawano
BIOPHYSICAL JOURNAL
(2022)
Meeting Abstract
Behavioral Sciences
Yosuke Fukutani, Kentaro Ikegami, Masafumi Yohda, Hiroaki Matsunami
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)
