Search Results - "Fujiwara, Masazumi"

Diamond quantum sensors in microfluidics technology by Fujiwara, Masazumi

“…Diamond quantum sensing is an emerging technology for probing multiple physico-chemical parameters in the nano- to micro-scale dimensions within diverse…”
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Wide-field fluorescent nanodiamond spin measurements toward real-time large-area intracellular thermometry by Nishimura, Yushi, Oshimi, Keisuke, Umehara, Yumi, Kumon, Yuka, Miyaji, Kazu, Yukawa, Hiroshi, Shikano, Yutaka, Matsubara, Tsutomu, Fujiwara, Masazumi, Baba, Yoshinobu, Teki, Yoshio

“…Measuring optically detected magnetic resonance (ODMR) of diamond nitrogen vacancy centers significantly depends on the photon detectors used. We study…”
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Monitoring spin coherence of single nitrogen-vacancy centers in nanodiamonds during pH changes in aqueous buffer solutions by Fujiwara, Masazumi, Tsukahara, Ryuta, Sera, Yoshihiko, Yukawa, Hiroshi, Baba, Yoshinobu, Shikata, Shinichi, Hashimoto, Hideki

“…We report on the sensing stability of quantum nanosensors in aqueous buffer solutions for the two detection schemes of quantum decoherence spectroscopy and…”
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Particle size effects of tetrahedron-shaped Ag3PO4 photocatalyst on water-oxidation activity and carrier recombination dynamics by Miyasato, Ryo, Fujiwara, Masazumi, Sato, Haruyuki, Yano, Toshihiro, Hashimoto, Hideki

“…[Display omitted] •Tetrahedron-shaped Ag3PO4 photocatalysts were synthesized with various particle sizes.•Ag3PO4 with 1.5 μm had the highest rate of oxygen…”
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Photoprotective mechanisms in the core LH1 antenna pigment-protein complex from the purple photosynthetic bacterium, Rhodospirillum rubrum by Uragami, Chiasa, Sato, Hiroki, Yukihira, Nao, Fujiwara, Masazumi, Kosumi, Daisuke, Gardiner, Alastair T., Cogdell, Richard J., Hashimoto, Hideki

“…[Display omitted] •Photoprotection mechanisms in LH1 from Rsp. rubrum are fully understood.•Global and traget analyses were applied to time-resolved absorption…”
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Observation of the linewidth broadening of single spins in diamond nanoparticles in aqueous fluid and its relation to the rotational Brownian motion by Fujiwara, Masazumi, Shikano, Yutaka, Tsukahara, Ryuta, Shikata, Shinichi, Hashimoto, Hideki

“…Capturing the fast rotational motion of single nanoparticles has been hindered owing to the difficulty of acquiring directional information under the optical…”
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Correlation between surface carrier dynamics and water oxidation activity of commercially available rutile-type TiO2 powders by Miyasato, Ryo, Fujiwara, Masazumi, Sato, Haruyuki, Yano, Toshihiro, Hashimoto, Hideki

“…[Display omitted] •Time-resolved diffuse reflection spectra were recorded for rutile-type TiO2 powders.•Global and target analysis was applied for all the…”
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Surface and bulk carrier recombination dynamics of rutile type TiO2 powder as revealed by sub-ns time-resolved diffuse reflection spectroscopy by Miyasato, Ryo, Sato, Haruyuki, Yano, Toshihiro, Fujiwara, Masazumi, Hashimoto, Hideki

“…[Display omitted] •Sub-ns time-resolved diffuse reflection spectra of rutile TiO2 were recorded.•Global and target analysis was applied to the whole observed…”
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Operando time-resolved diffuse reflection spectroscopy: The origins of photocatalytic water-oxidation activity of bismuth vanadate by Miyasato, Ryo, Fujiwara, Masazumi, Uragami, Chiasa, Sato, Haruyuki, Yano, Toshihiro, Hashimoto, Hideki

“…[Display omitted] •Physical properties of two types of BiVO4 crystals were investigated.•Sub-ns transient diffuse reflection spectra (TDRS) of each BiVO4…”
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A quantum thermometric sensing and analysis system using fluorescent nanodiamonds for the evaluation of living stem cell functions according to intracellular temperature by Yukawa, Hiroshi, Fujiwara, Masazumi, Kobayashi, Kaori, Kumon, Yuka, Miyaji, Kazu, Nishimura, Yushi, Oshimi, Keisuke, Umehara, Yumi, Teki, Yoshio, Iwasaki, Takayuki, Hatano, Mutsuko, Hashimoto, Hideki, Baba, Yoshinobu

“…Intracellular thermometry techniques play an important role in elucidating the relationship between the intracellular temperature and stem cell functions…”
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Real-time estimation of the optically detected magnetic resonance shift in diamond quantum thermometry toward biological applications by Fujiwara, Masazumi, Dohms, Alexander, Suto, Ken, Nishimura, Yushi, Oshimi, Keisuke, Teki, Yoshio, Cai, Kai, Benson, Oliver, Shikano, Yutaka

“…Real-time estimation protocols for the frequency shift of optically detected magnetic resonance (ODMR) of nitrogen-vacancy (NV) centers in nanodiamonds (NDs)…”
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Measuring the charge density of a tapered optical fiber using trapped microparticles by Kamitani, Kazuhiko, Muranaka, Takuya, Takashima, Hideaki, Fujiwara, Masazumi, Tanaka, Utako, Takeuchi, Shigeki, Urabe, Shinji

“…We report the measurements of charge density of tapered optical fibers using charged particles confined in a linear Paul trap at ambient pressure. A tapered…”
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Optical tracking of picosecond coherent phonon pulse focusing inside a sub-micron object by Dehoux, Thomas, Ishikawa, Kenichi, Otsuka, Paul H, Tomoda, Motonobu, Matsuda, Osamu, Fujiwara, Masazumi, Takeuchi, Shigeki, Veres, Istvan A, Gusev, Vitalyi E, Wright, Oliver B

“…By means of an ultrafast optical technique, we track focused gigahertz coherent phonon pulses in objects down to sub-micron in size. Infrared light pulses…”
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Strategies to enhance the excitation energy-transfer efficiency in a light-harvesting system using the intra-molecular charge transfer character of carotenoids by Yukihira, Nao, Sugai, Yuko, Fujiwara, Masazumi, Kosumi, Daisuke, Iha, Masahiko, Sakaguchi, Kazuhiko, Katsumura, Shigeo, Gardiner, Alastair T, Cogdell, Richard J, Hashimoto, Hideki

“…Fucoxanthin is a carotenoid that is mainly found in light-harvesting complexes from brown algae and diatoms. Due to the presence of a carbonyl group attached…”
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Development of microfabricated TiO2 channel waveguides by Furuhashi, Masayuki, Fujiwara, Masazumi, Ohshiro, Takahito, Tsutsui, Makusu, Matsubara, Kazuki, Taniguchi, Masateru, Takeuchi, Shigeki, Kawai, Tomoji

“…An optical channel waveguide is a key solution to overcome signal propagation delay. For the benefits of miniaturization, development of microfabrication…”
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Phase shift spectra of a fiber-microsphere system at the single photon level by Tanaka, Akira, Asai, Takeshi, Toubaru, Kiyota, Takashima, Hideaki, Fujiwara, Masazumi, Okamoto, Ryo, Takeuchi, Shigeki

“…We succeeded in measuring phase shift spectra of a microsphere cavity coupled with a tapered fiber using a weak coherent probe light at the single photon…”
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Fiber-Coupled Diamond Micro-Waveguides toward an Efficient Quantum Interface for Spin Defect Centers by Fujiwara, Masazumi, Neitzke, Oliver, Schröder, Tim, Schell, Andreas W, Wolters, Janik, Zheng, Jiabao, Mouradian, Sara, Almoktar, Mohamed, Takeuchi, Shigeki, Englund, Dirk, Benson, Oliver

“…We report the direct integration and efficient coupling of nitrogen vacancy (NV) color centers in diamond nanophotonic structures into a fiber-based photonic…”
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Embedded TiO2 waveguides for sensing nanofluorophores in a microfluidic channel by Furuhashi, Masayuki, Fujiwara, Masazumi, Ohshiro, Takahito, Matsubara, Kazuki, Tsutsui, Makusu, Taniguchi, Masateru, Takeuchi, Shigeki, Kawai, Tomoji

“…Crossed structure of a microfluidic channel and an optical channel waveguide is simple and promising to realize detection of weak fluorescence on an integrated…”
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Optimized terahertz-wave generation using BNA-DFG by Miyamoto, Katsuhiko, Ohno, Seigo, Fujiwara, Masazumi, Minamide, Hiroaki, Hashimoto, Hideki, Ito, Hiromasa

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Effect of Substrates on the Temperature Dependence of Fluorescence Spectra of Nitrogen Vacancy Centers in Diamond Nanocrystals by Zhao, Hong-Quan, Fujiwara, Masazumi, Takeuchi, Shigeki

“…The temperature dependence of fluorescence spectra of nitrogen vacancy (NV) centers in diamond nanocrystals is investigated in terms of the ability of the…”
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