Article
Chemistry, Multidisciplinary
Jungeun Song, Soyeong Kwon, Hyunjeong Jeong, Hyeji Choi, Anh Thi Nguyen, Ha Kyung Park, Hyeong-Ho Park, William Jo, Sang Wook Lee, Dong-Wook Kim
Summary: Hybrid nanostructures of MoS2 monolayers and Au nanopillar arrays were fabricated. The MoS2 flakes transferred onto the Au-NPs were observed to be flat and nonstrained. The Raman and photoluminescence intensities of MoS2/Au-NP were significantly higher than those of MoS2 flakes on a flat Au thin film. Finite-difference time-domain calculations showed that the Au-NPs enhanced the absorption in the MoS2 flakes and enabled efficient collection of photogenerated electrons.
Article
Nanoscience & Nanotechnology
Diptiranjan Paital, Varsha Thambi, Mahesh S. Kutwal, Saumyakanti Khatua
Summary: Plasmonic porous Au-Ag nanoparticles show significantly improved catalytic activity in electrochemical and photoelectrochemical methanol oxidation reaction (MOR). The presence of nanopores suppresses poisoning from intermediate species, leading to improved stability. Additionally, the porous nanoparticles exhibit enhanced catalytic activity under visible and near-infrared excitations.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dung Van Dao, Hyuk Choi, Thuy T. D. Nguyen, Sang-Woo Ki, Gyu-Cheol Kim, Hoki Son, Jin-Kyu Yang, Yeon-Tae Yu, Hyun You Kim, In-Hwan Lee
Summary: Recently, a three-factored hierarchical photocatalyst consisting of plasmon Au, ceria semiconductor, and graphene conductor was developed for hydrogen production. This catalyst showed superior performance compared to other catalysts currently available, achieving a high quantum yield efficiency.
Article
Chemistry, Physical
Guangyuan He, Xiaoyu Han, Shiyi Cao, Kaimin Cui, Qihang Tian, Jihong Zhang
Summary: This study synthesized long spiky noble metal alloy nanostars and fabricated probes by attaching them uniformly on multi-mode silica fibers. The experiments demonstrated that the synthesized nanostars exhibited improved SERS performance, with a detection limit as low as 10(-8) M and an enhancement factor of 6.23 x 10(6). The fiber probes also showed good reproducibility and stability in ambient atmosphere, indicating their potential for qualitative and quantitative molecule detection applications.
Article
Engineering, Electrical & Electronic
H. Akafzade, N. Hozhabri, S. C. Sharma
Summary: This study presents a new type of SPR sensor fabricated using a multi-layer nanostructure Ag/Si3N4/Au, showing excellent performance in monitoring relative concentration of glucose. The sensor's performance is significantly enhanced by high strength of the evanescent electric fields associated with surface plasmon resonance, resolving glucose concentrations down to about a percent. Strong evanescent fields with long decay lengths contribute to the sensor's performance, facilitating the detection of changes in optical properties at large distances.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Physical
Yong Liu, Chi Pang, Hiroshi Amekura, Thomas Schumann, Peng Liu, Zhixian Wei, Haocheng Liu, Rang Li
Summary: By designing the structure of metal nanoparticles, the manipulation of surface plasmonics can be achieved, resulting in enhanced absorption and fine-tuning of localized surface plasmon resonance band. This offers potential for improving the performance of nonlinear photonic devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Baeck B. Choi, Bethy Kim, Yiqi Chen, Sung Jong Yoo, Younghyun Cho, Peng Jiang
Summary: In this study, the colloidal Langmuir-Blodgett coating process was used to fabricate Au-covered silica sphere monolayers and investigate the impact of silica diameter on surface plasmon resonance sensing sensitivity. The research found that larger silica sphere diameters and dipole mode exhibited higher sensitivity in surface plasmon resonance sensing applications.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Zuoru Dong, Peizong Chen, Shujie Li, Zuimin Jiang, Fei Xu
Summary: This study investigates the plasmonic effect of graphene in the UV region on photoluminescence enhancement in different structures and reveals phenomena such as reduction and enhancement of PL intensity, as well as electron transfer mechanisms.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Multidisciplinary
Abdelsalam Rawashdeh, Aaron Wildenborg, Eric Liu, Zhi Gao, David A. Czaplewski, Hongwei Qu, Jae Yong Suh, Ankun Yang
Summary: Researchers have developed a scalable method for fabricating sodium (Na) nanostructures with ultralow optical loss and tunable surface plasmon polariton (SPP) modes spanning visible to NIR. They have also addressed the reactivity challenges of Na through a simple encapsulation strategy, enabling the stable existence of Na nanostructures for over two months. Sodium, as a low-cost and low-loss plasmonic material, offers a competitive option for nanophotonic devices and plasmon-enhanced applications.
Article
Chemistry, Multidisciplinary
Xiaobing Tang, Zhibiao Hao, Lai Wang, Jiadong Yu, Xun Wang, Yi Luo, Changzheng Sun, Yanjun Han, Bing Xiong, Jian Wang, Hongtao Li
Summary: In this study, an Au/GaN-nanopillar-based photodetector was designed and prepared, which can operate in the short-wave infrared range and has a relatively simple structure and easy preparation process. Compared to planar devices, this device showed a two orders of magnitude enhancement in responsivity.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Qihang Tian, Shiyi Cao, Guangyuan He, Yuting Long, Xuedong Zhou, Jihong Zhang, Jun Xie, Xiujian Zhao
Summary: In this study, Au-Ag alloy nanostars were synthesized and assembled on optical fibers to fabricate fiber probes for ultra-trace molecular detection. The fiber probes demonstrated high sensitivity and good reproducibility, making them suitable for quantitative analysis in chemistry, biology, and other fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Taek Joon Kim, Dayeong Kwon, Jun Young Kim, Amit Kumar Harit, Eunji Lee, Han Young Woo, Jeongyong Kim, Jinsoo Joo
Summary: In this study, organic-inorganic metal halide perovskite thin sheets were used to fabricate photodetectors. By hybridizing a π-conjugated polyelectrolyte and functionalized gold nanoparticles, the photodetector performance was significantly improved.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Oncology
Asrin Pakravan, Roya Salehi, Mehrdad Mahkam
Summary: By synthesizing seven different shapes of gold nanoparticles, the study investigated the effect of shape on cellular uptake and photothermal therapy efficacy. The results showed that gold nanostars exhibited the lowest cytotoxicity, highest cellular uptake, and highest heat generation, indicating good potential for photothermal therapy.
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
(2021)
Article
Chemistry, Physical
Astrini Pradyasti, Jae Hwan Jeong, Sang Heon Kim, Mun Ho Kim
Summary: A facile method for preparing porous triangular Au-Ag-Ag2S bimetal-semiconductor hybrid nanostructures was developed by selectively etching Ag and controlled deposition of Au. These hybrid nanostructures exhibited enhanced catalytic performance and high photothermal conversion properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Hyerin Song, Heesang Ahn, Taeyeon Kim, Jong-ryul Choi, Kyujung Kim
Summary: This study investigates the field distributions of localized surface plasmons on specifically shaped nanostructures and explores the feasibility of manipulating LSP fields by adjusting wavelength, polarization, and the incident orientation of the light source. The calculation of plasmonic fields at different wavelengths for various nanostructure types reveals the potential for manipulating the positions of LSP fields.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Keisuke Nakamura, Tomoya Oshikiri, Kosei Ueno, Hiromichi Ohta, Hiroaki Misawa
Summary: The fabrication of a NiO/Au-NPs/TiO2 structure with Au-NPs placed in the p-n junction revealed that the main driving force for hole separation came from the local electric field of the depletion layer in the p-n junction of TiO2 and NiO, rather than the Schottky junction of Au and NiO.
Article
Chemistry, Multidisciplinary
Yongjoon Kim, Tomohiro Iwai, Sho Fujii, Kosei Ueno, Masaya Sawamura
Summary: The newly synthesized dumbbell-shaped bipyridines with distal steric effects of bipyridine C5- and C5'-triarylmethyl substituents showed improved performance in nickel-catalyzed reactions compared to conventional ligands; these ligands are characterized by their molecular shape and distal steric effects.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Daniel E. Gomez, Xu Shi, Tomoya Oshikiri, Ann Roberts, Hiroaki Misawa
Summary: We experimentally demonstrate and theoretically study the formation of coherent plasmon-exciton states, which exhibit high absorption of incident light and cancellation of absorption. Our research shows the potential implications of these coherent states and opens the prospect for devices exploiting coherent effects in applications.
Article
Chemistry, Multidisciplinary
Yoshiki Suganami, Tomoya Oshikiri, Xu Shi, Hiroaki Misawa
Summary: A photoanode structure with an Au-Ag alloy nanoparticles, TiO2 thin film, and Au film under ultrastrong coupling conditions was developed to achieve efficient photochemical reactions and high photoelectric conversion efficiency. The increased hot-electron injection efficiency in this structure led to a Faraday efficiency of more than 70% for O-2 evolution in water oxidation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Tomoya Oshikiri, Haruki Jo, Xu Shi, Hiroaki Misawa
Summary: This study utilized the concept of modal strong coupling between metal nanoparticles and a nanocavity to enhance the efficiency of hot-hole injection. The results showed that the hybrid modes of the modal strong coupling system promoted hot-hole injection and proton/water reduction by hot electrons over a broad wavelength range.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yusuke Ueda, Yusuke Masuda, Tomohiro Iwai, Keisuke Imaeda, Hiroki Takeuchi, Kosei Ueno, Min Gao, Jun-ya Hasegawa, Masaya Sawamura
Summary: We present a copper-catalyzed enantioselective umpolung allylic acylation reaction under visible light. The reaction involves the use of acylsilanes as acyl anion equivalents and is supported by triplet-quenching experiments and DFT calculations. The reaction mechanism involves a charge-separated triplet state intermediate generated by copper-to-acyl metal-to-ligand charge transfer photoexcitation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Giles Allison, Amrita Kumar Sana, Yuta Ogawa, Hidemi Kato, Kosei Ueno, Hiroaki Misawa, Koki Hayashi, Hironori Suzuki
Summary: Surface plasmon resonance technology is commonly used for detecting binding kinetics in biological samples, but is often limited by complex optical detection methods. This study introduces an optoelectronic approach where a plasmonic sensor integrated in a photovoltaic cell can generate an electronic signal sensitive to the refractive index of a solution through plasmon interaction. This near-field electrical detection of surface plasmon resonance shows promise for the development of next generation cost-effective, compact, and high throughput biosensors.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Hiroki Ago, Susumu Okada, Yasumitsu Miyata, Kazunari Matsuda, Mikito Koshino, Kosei Ueno, Kosuke Nagashio
Summary: The past decades of materials science discoveries have laid the foundation for our present society. The recent discovery of graphene and other 2D materials offers a novel approach to synthesizing materials and exploring new physics and chemistry.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chiaki Kojima, Akemi Noguchi, Tatsuya Nagai, Ken-ichi Yuyama, Sho Fujii, Kosei Ueno, Nobuaki Oyamada, Kei Murakoshi, Tatsuya Shoji, Yasuyuki Tsuboi
Summary: Membrane fusion is an important and ubiquitous process in living organisms. This study developed a novel method for liposome fusion based on laser-induced bubble generation on gold surfaces, creating ultralong tubes similar to sea anemones. The behavior of the tubes was monitored using fluorescence microscopy, and the generation of these tubes was discussed in relation to Marangoni convection and thermophoresis.
Article
Multidisciplinary Sciences
Pedro Paulo Ferreira da Rosa, Yuichi Kitagawa, Sunao Shoji, Hironaga Oyama, Keisuke Imaeda, Naofumi Nakayama, Koji Fushimi, Hidehiro Uekusa, Kosei Ueno, Hitoshi Goto, Yasuchika Hasegawa
Summary: Soft-crystal copolymerization of Tb(III) and Dy(III) complexes is achieved, and long-range energy transfer from one crystal to the other is studied.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yaguang Wang, Xu Shi, Tomoya Oshikiri, Hiroaki Misawa
Summary: We fabricated a novel photoanode structure that efficiently enhances light absorption and electron transfer through modal strong coupling, enabling water splitting at zero bias potential.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Physical
Xiaoqian Zang, Xu Shi, Yoshiki Suganami, Yen-En Liu, Tomoya Oshikiri, Hiroaki Misawa
Summary: In this study, a strong coupling photoelectrode with localized surface plasmon resonance (LSPR) and Fabry-Perot (FP) nanocavity was fabricated to investigate the enhancement mechanism of plasmon-induced chemical reactions. The efficient water oxidation on the strong coupling electrode was considered a result of quantum coherence between the Au-Ag alloy nanoparticles through the nanocavity. In situ electrochemical surface-enhanced Raman spectroscopy was used to detect the intermediates of water oxidation and showed a more negative onset potential on the strong coupling electrode.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Chih-Hao Huang, Ya-Chiao Lee, Tetsuhiro Kudo, Xu Shi, Kosei Ueno, Teruki Sugiyama, Hiroaki Misawa, Hiroshi Masuhara
Summary: In this study, optical trapping with fabricated gold nanodisk arrangement was used to observe the trapping and arrangement of gold nanoparticles between the nanodisks, as well as the bidirectional and unidirectional swarming behavior of the nanoparticles. These findings provide valuable insights into optical manipulation techniques coupled with fabricated nanostructures, expanding the possibilities for optical trapping and related research.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Bhagyashree Mahesha Sachith, Zhijing Zhang, Palyam Subramanyam, Challapalli Subrahmanyam, Akihiro Furube, Naoto Tamai, Takuya Okamoto, Hiroaki Misawa, Vasudevanpillai Biju
Summary: Bandgap-engineered inorganic and hybrid halide perovskite materials have shown great promise for solar cells, but fluctuations in the photoinduced electron transfer (PET) rates can affect their performance. In this study, we investigated the fluctuations of interfacial PET in perovskite-based donor-acceptor systems at both single-particle and ensemble levels. By analyzing the Gibbs free energy changes and studying the dynamics of PET, we gained insights into the charge separation mechanisms in these systems. Our findings provide valuable information for optimizing the design and performance of perovskite solar cells.
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)
