Search Results - "Shirahata, Naoto"

Effect of the surface coverage of an alkyl carboxylic acid monolayer on waterborne and cellular uptake behaviors for silicon quantum dots by Shirahata, Naoto

“…This article reports the development of highly waterborne silicon quantum dots (Si QDs) terminated with a reactive group for grafting of biomolecules…”
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Recent advances on fluorescent biomarkers of near-infrared quantum dots for in vitro and in vivo imaging by Chinnathambi, Shanmugavel, Shirahata, Naoto

“…Luminescence probe has been broadly used for bio-imaging applications. Among them, near-infrared (NIR) quantum dots (QDs) are more attractive due to minimal…”
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Recent Progress in Controlled Nanostructure of Colloidal Nanocrystal Powders for Efficient Light Emission by Shirahata, Naoto

“…The application of semiconductor nanocrystals containing cadmium, lead, selenium and mercury as constituent elements is strictly limited by concerns about…”
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Colloidal silicon quantum dots: synthesis and luminescence tuning from the near-UV to the near-IR range by Ghosh, Batu, Shirahata, Naoto

“…This review describes a series of representative synthesis processes, which have been developed in the last two decades to prepare silicon quantum dots (QDs)…”
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Metal-free scintillators excite X-ray community by Chen, Jia-Kai, Shirahata, Naoto, Sun, Hong-Tao

“…Scintillators used in X-ray detectors typically require the use of heavy metal atoms to efficiently harvest ionizing radiation. Now the use of halogens is…”
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Monolayer formation of luminescent germanium nanoparticles on silica surface in aqueous buffer solution by Shirahata, Naoto

“…The present paper reports monolayer formation of germanium nanoparticles (Ge NPs) on silica substrate. The NPs were prepared by hydride reduction of GeCl4,…”
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Improved Brightness and Color Tunability of Solution-Processed Silicon Quantum Dot Light-Emitting Diodes by Yamada, Hiroyuki, Saitoh, Noriyuki, Ghosh, Batu, Masuda, Yoshitake, Yoshizawa, Noriko, Shirahata, Naoto

“…Herein, an enhanced electroluminescence (EL) performance of solution-processed silicon quantum dot light-emitting diodes (Si-QLEDs) is demonstrated. We…”
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Impact of Anchoring Monolayers on the Enhancement of Radiative Recombination in Light-Emitting Diodes Based on Silicon Nanocrystals by Ghosh, Batu, Hamaoka, Takumi, Nemoto, Yoshihiro, Takeguchi, Masaki, Shirahata, Naoto

“…In the current paper, we provide direct evidence of a controlled structure of silicon nanocrystals (SiNCs). The photoluminescence quantum yields (PLQYs) are…”
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Size-Dependent Color Tuning of Efficiently Luminescent Germanium Nanoparticles by Shirahata, Naoto, Hirakawa, Daigo, Masuda, Yoshitake, Sakka, Yoshio

“…It is revealed that rigorous control of the size and surface of germanium nanoparticles allows fine color tuning of efficient fluorescence emission in the…”
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A facile approach to preparing personalized cancer vaccines using iron-based metal organic framework by Li, Xia, Hattori, Shinya, Ebara, Mitsuhiro, Shirahata, Naoto, Hanagata, Nobutaka

“…Considering the diversity of tumors, it is of great significance to develop a simple, effective, and low-cost method to prepare personalized cancer vaccines…”
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Surface charge-dependent cytokine production using near-infrared emitting silicon quantum dots by Chinnathambi, Shanmugavel, Shirahata, Naoto, Lesani, Pooria, Thangavel, Vaijayanthi, Pandian, Ganesh N.

“…Toll-like receptor 9 (TLR-9) is a protein that helps our immune system identify specific DNA types. Upon detection, CpG oligodeoxynucleotides signal the immune…”
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Water-Soluble Silicon Quantum Dots toward Fluorescence-Guided Photothermal Nanotherapy by Özbilgin, İrem Nur Gamze, Yamazaki, Tomohiko, Watanabe, Junpei, Sun, Hong-Tao, Hanagata, Nobutaka, Shirahata, Naoto

“…We report carboxy-terminated silicon quantum dots (SiQDs) that exhibit high solubility in water due to the high molecular coverage of surface monolayers,…”
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Theory-Guided Synthesis of Highly Luminescent Colloidal Cesium Tin Halide Perovskite Nanocrystals by Liu, Qi, Yin, Jun, Zhang, Bin-Bin, Chen, Jia-Kai, Zhou, Yang, Zhang, Lu-Min, Wang, Lu-Ming, Zhao, Qing, Hou, Jingshan, Shu, Jie, Song, Bo, Shirahata, Naoto, Bakr, Osman M, Mohammed, Omar F, Sun, Hong-Tao

“…The synthesis of highly luminescent colloidal CsSnX3 (X = halogen) perovskite nanocrystals (NCs) remains a long-standing challenge due to the lack of a…”
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Transition‐Metal‐Doped NIR‐Emitting Silicon Nanocrystals by Chandra, Sourov, Masuda, Yoshitake, Shirahata, Naoto, Winnik, Françoise M.

“…Impurity‐doping in nanocrystals significantly affects their electronic properties and diversifies their applications. Herein, we report the synthesis of…”
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Origin of the Photoluminescence Quantum Yields Enhanced by Alkane-Termination of Freestanding Silicon Nanocrystals: Temperature-Dependence of Optical Properties by Ghosh, Batu, Takeguchi, Masaki, Nakamura, Jin, Nemoto, Yoshihiro, Hamaoka, Takumi, Chandra, Sourov, Shirahata, Naoto

“…On the basis of the systematic study on temperature dependence of photoluminescence (PL) properties along with relaxation dynamics we revise a long-accepted…”
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Influence of Oxidation on Temperature-Dependent Photoluminescence Properties of Hydrogen-Terminated Silicon Nanocrystals by Ghosh, Batu, Shirahata, Naoto

“…In this study, we investigate temperature-dependent photoluminescence (PL) in three samples of hydrogen-terminated silicon nanocrystals (ncSi-H) with different…”
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Silicon Quantum Dot Light Emitting Diode at 620 nm by Yamada, Hiroyuki, Shirahata, Naoto

“…Here we report a quantum dot light emitting diode (QLED), in which a layer of colloidal silicon quantum dots (SiQDs) works as the optically active component,…”
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Hybrid White Light Emitting Diode Based on Silicon Nanocrystals by Ghosh, Batu, Masuda, Yoshitake, Wakayama, Yutaka, Imanaka, Yasutaka, Inoue, Jun-ichi, Hashi, Kenjiro, Deguchi, Kenzo, Yamada, Hideto, Sakka, Yoshio, Ohki, Shinobu, Shimizu, Tadashi, Shirahata, Naoto

“…A novel design of white light emitting diodes (WLEDs) emerges to meet the growing global demand for resource sustainability while preserving health and…”
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Inverted Device Architecture for Enhanced Performance of Flexible Silicon Quantum Dot Light-Emitting Diode by Ghosh, Batu, Yamada, Hiroyuki, Chinnathambi, Shanmugavel, Özbilgin, İrem Nur Gamze, Shirahata, Naoto

“…Here we report for the first time highly flexible quantum dot light-emitting diodes (QLEDs), in which a layer of red-emitting colloidal silicon quantum dots…”
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Non‐Rare‐Earth UVC Persistent Phosphors Enabled by Bismuth Doping by Liu, Qi, Feng, Zhao‐Yang, Li, Hong, Zhao, Qing, Shirahata, Naoto, Kuroiwa, Yoshihiro, Moriyoshi, Chikako, Duan, Chang‐Kui, Sun, Hong‐Tao

“…Long persistent phosphors (LPPs) have drawn tremendous research interest owing to their mysterious optical phenomena and widespread applications. LPPs in the…”
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