start-ver=1.4
cd-journal=joma
no-vol=18
cd-vols=
no-issue=52
article-no=
start-page=35202
end-page=35213
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2024
dt-pub=20241216
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Bright Quantum-Grade Fluorescent Nanodiamonds
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Optically accessible spin-active nanomaterials are promising as quantum nanosensors for probing biological samples. However, achieving bioimaging-level brightness and high-quality spin properties for these materials is challenging and hinders their application in quantum biosensing. Here, we demonstrate bright fluorescent nanodiamonds (NDs) containing 0.6–1.3-ppm negatively charged nitrogen-vacancy (NV) centers by spin-environment engineering via enriching spin-less 12C-carbon isotopes and reducing substitutional nitrogen spin impurities. The NDs, readily introduced into cultured cells, exhibited improved optically detected magnetic resonance (ODMR) spectra; peak splitting (E) was reduced by 2–3 MHz, and microwave excitation power required was 20 times lower to achieve a 3% ODMR contrast, comparable to that of conventional type-Ib NDs. They show average spin-relaxation times of T1 = 0.68 ms and T2 = 3.2 μs (1.6 ms and 5.4 μs maximum) that were 5- and 11-fold longer than those of type-Ib, respectively. Additionally, the extended T2 relaxation times of these NDs enable shot-noise-limited temperature measurements with a sensitivity of approximately 0.28K/√Hz. The combination of bulk-like NV spin properties and enhanced fluorescence significantly improves the sensitivity of ND-based quantum sensors for biological applications.
en-copyright=
kn-copyright=

en-aut-name=OshimiKeisuke
en-aut-sei=Oshimi
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=IshiwataHitoshi
en-aut-sei=Ishiwata
en-aut-mei=Hitoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NakashimaHiromu
en-aut-sei=Nakashima
en-aut-mei=Hiromu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=MandićSara
en-aut-sei=Mandić
en-aut-mei=Sara
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=KobayashiHina
en-aut-sei=Kobayashi
en-aut-mei=Hina
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=TeramotoMinori
en-aut-sei=Teramoto
en-aut-mei=Minori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=TsujiHirokazu
en-aut-sei=Tsuji
en-aut-mei=Hirokazu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=NishibayashiYoshiki
en-aut-sei=Nishibayashi
en-aut-mei=Yoshiki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=ShikanoYutaka
en-aut-sei=Shikano
en-aut-mei=Yutaka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

en-aut-name=AnToshu
en-aut-sei=An
en-aut-mei=Toshu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=

en-aut-name=FujiwaraMasazumi
en-aut-sei=Fujiwara
en-aut-mei=Masazumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=

affil-num=1
en-affil=Department of Chemistry, Graduate School of Life, Environmental, Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=The National Institutes for Quantum Science and Technology (QST), Institute for Quantum Life Science (iQLS)
kn-affil=

affil-num=3
en-affil=Department of Chemistry, Graduate School of Life, Environmental, Natural Science and Technology, Okayama University
kn-affil=

affil-num=4
en-affil=Department of Chemistry, Graduate School of Life, Environmental, Natural Science and Technology, Okayama University
kn-affil=

affil-num=5
en-affil=Department of Chemistry, Graduate School of Life, Environmental, Natural Science and Technology, Okayama University
kn-affil=

affil-num=6
en-affil=Advanced Materials Laboratory, Sumitomo Electric Industries, Ltd.
kn-affil=

affil-num=7
en-affil=Advanced Materials Laboratory, Sumitomo Electric Industries, Ltd.
kn-affil=

affil-num=8
en-affil=Advanced Materials Laboratory, Sumitomo Electric Industries, Ltd.
kn-affil=

affil-num=9
en-affil=Institute of Systems and Information Engineering, University of Tsukuba
kn-affil=

affil-num=10
en-affil=School of Materials Science, Japan Advanced Institute of Science and Technology
kn-affil=

affil-num=11
en-affil=Department of Chemistry, Graduate School of Life, Environmental, Natural Science and Technology, Okayama University
kn-affil=
en-keyword=nanodiamonds
kn-keyword=nanodiamonds
en-keyword=nitrogen-vacancy centers
kn-keyword=nitrogen-vacancy centers
en-keyword=spins
kn-keyword=spins
en-keyword=spin-relaxation times
kn-keyword=spin-relaxation times
en-keyword=quantum biosensor
kn-keyword=quantum biosensor
en-keyword=cellular probes
kn-keyword=cellular probes
END

start-ver=1.4
cd-journal=joma
no-vol=358
cd-vols=
no-issue=
article-no=
start-page=142060
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2024
dt-pub=202406
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Size, polyglycerol grafting, and net surface charge of iron oxide nanoparticles determine their interaction and toxicity in Caenorhabditis elegans
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The widespread application of engineered nanoparticles (NPs) in environmental remediation has raised public concerns about their toxicity to aquatic organisms. Although appropriate surface modification can mitigate the ecotoxicity of NPs, the lack of polymer coating to inhibit toxicity completely and the insufficient knowledge about charge effect hinder the development of safe nanomaterials. Herein, we explored the potential of polyglycerol (PG) functionalization in alleviating the environmental risks of NPs. Iron oxide NPs (ION) of 20, 100, and 200 nm sizes (IONS, IONM and IONL, respectively) were grafted with PG to afford ION-PG. We examined the interaction of ION and ION-PG with Caenorhabditis elegans (C. elegans) and found that PG suppressed non-specific interaction of ION with C. elegans to reduce their accumulation and to inhibit their translocation. Particularly, IONS-PG was completely excluded from worms of all developmental stages. By covalently introducing sulfate, carboxyl and amino groups onto IONS-PG, we further demonstrated that positively charged IONS-PG-NH3+ induced high intestinal accumulation, cuticle adhesion and distal translocation, whereas the negatively charged IONS-PG-OSO3– and IONS-PG-COO– were excreted out. Consequently, no apparent deleterious effects on brood size and life span were observed in worms treated by IONS-PG and IONS-PG bearing negatively charged groups. This study presents new surface functionalization approaches for developing ecofriendly nanomaterials.
en-copyright=
kn-copyright=

en-aut-name=ZouYajuan
en-aut-sei=Zou
en-aut-mei=Yajuan
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=ShikanoYutaka
en-aut-sei=Shikano
en-aut-mei=Yutaka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NishinaYuta
en-aut-sei=Nishina
en-aut-mei=Yuta
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=KomatsuNaoki
en-aut-sei=Komatsu
en-aut-mei=Naoki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=Kage-NakadaiEriko
en-aut-sei=Kage-Nakadai
en-aut-mei=Eriko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=FujiwaraMasazumi
en-aut-sei=Fujiwara
en-aut-mei=Masazumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Institute of Systems and Information Engineering, University of Tsukuba
kn-affil=

affil-num=3
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=4
en-affil=Graduate School of Human and Environmental Studies, Kyoto University
kn-affil=

affil-num=5
en-affil=Department of Nutrition, Graduate School of Human Life and Ecology, Osaka Metropolitan University
kn-affil=

affil-num=6
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=iron oxide nanoparticles
kn-keyword=iron oxide nanoparticles
en-keyword=polyglycerol functionalization
kn-keyword=polyglycerol functionalization
en-keyword=C. elegans
kn-keyword=C. elegans
en-keyword=accumulation
kn-keyword=accumulation
en-keyword=distribution
kn-keyword=distribution
en-keyword=toxicity
kn-keyword=toxicity
END

start-ver=1.4
cd-journal=joma
no-vol=17
cd-vols=
no-issue=5
article-no=
start-page=054107
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2023
dt-pub=20231016
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Diamond quantum sensors in microfluidics technology
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Diamond quantum sensing is an emerging technology for probing multiple physico-chemical parameters in the nano- to micro-scale dimensions within diverse chemical and biological contexts. Integrating these sensors into microfluidic devices enables the precise quantification and analysis of small sample volumes in microscale channels. In this Perspective, we present recent advancements in the integration of diamond quantum sensors with microfluidic devices and explore their prospects with a focus on forthcoming technological developments.
en-copyright=
kn-copyright=

en-aut-name=FujiwaraMasazumi
en-aut-sei=Fujiwara
en-aut-mei=Masazumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

affil-num=1
en-affil=Department of Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
kn-affil=
END

start-ver=1.4
cd-journal=joma
no-vol=22
cd-vols=
no-issue=13
article-no=
start-page=2519
end-page=2530
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2022
dt-pub=20220501
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Glass-patternable notch-shaped microwave architecture for on-chip spin detection in biological samples
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We report a notch-shaped coplanar microwave waveguide antenna on a glass plate designed for on-chip detection of optically detected magnetic resonance (ODMR) of fluorescent nanodiamonds (NDs). A lithographically patterned thin wire at the center of the notch area in the coplanar waveguide realizes a millimeter-scale ODMR detection area (1.5 × 2.0 mm2) and gigahertz-broadband characteristics with low reflection (∼8%). The ODMR signal intensity in the detection area is quantitatively predictable by numerical simulation. Using this chip device, we demonstrate a uniform ODMR signal intensity over the detection area for cells, tissue, and worms. The present demonstration of a chip-based microwave architecture will enable scalable chip integration of ODMR-based quantum sensing technology into various bioassay platforms.
en-copyright=
kn-copyright=

en-aut-name=OshimiKeisuke
en-aut-sei=Oshimi
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=NishimuraYushi
en-aut-sei=Nishimura
en-aut-mei=Yushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=MatsubaraTsutomu
en-aut-sei=Matsubara
en-aut-mei=Tsutomu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TanakaMasuaki
en-aut-sei=Tanaka
en-aut-mei=Masuaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=ShikohEiji
en-aut-sei=Shikoh
en-aut-mei=Eiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=ZhaoLi
en-aut-sei=Zhao
en-aut-mei=Li
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=ZouYajuan
en-aut-sei=Zou
en-aut-mei=Yajuan
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=KomatsuNaoki
en-aut-sei=Komatsu
en-aut-mei=Naoki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=IkadoYuta
en-aut-sei=Ikado
en-aut-mei=Yuta
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

en-aut-name=TakezawaYuka
en-aut-sei=Takezawa
en-aut-mei=Yuka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=

en-aut-name=Kage-NakadaiEriko
en-aut-sei=Kage-Nakadai
en-aut-mei=Eriko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=

en-aut-name=IzutsuYumi
en-aut-sei=Izutsu
en-aut-mei=Yumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=

en-aut-name=YoshizatoKatsutoshi
en-aut-sei=Yoshizato
en-aut-mei=Katsutoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=13
ORCID=

en-aut-name=MoritaSaho
en-aut-sei=Morita
en-aut-mei=Saho
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=14
ORCID=

en-aut-name=TokunagaMasato
en-aut-sei=Tokunaga
en-aut-mei=Masato
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=15
ORCID=

en-aut-name=YukawaHiroshi
en-aut-sei=Yukawa
en-aut-mei=Hiroshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=16
ORCID=

en-aut-name=BabaYoshinobu
en-aut-sei=Baba
en-aut-mei=Yoshinobu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=17
ORCID=

en-aut-name=TekiYoshio
en-aut-sei=Teki
en-aut-mei=Yoshio
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=18
ORCID=

en-aut-name=FujiwaraMasazumi
en-aut-sei=Fujiwara
en-aut-mei=Masazumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=19
ORCID=

affil-num=1
en-affil=Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Department of Chemistry, Graduate School of Science, Osaka City University
kn-affil=

affil-num=3
en-affil=Department of Anatomy and Regenerative Biology, Graduate School of Medicine, Osaka City University
kn-affil=

affil-num=4
en-affil=Department of Electrical and Information Engineering, Graduate School of Engineering, Osaka City University
kn-affil=

affil-num=5
en-affil=Department of Electrical and Information Engineering, Graduate School of Engineering, Osaka City University
kn-affil=

affil-num=6
en-affil=State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University
kn-affil=

affil-num=7
en-affil=Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=8
en-affil=Graduate School of Human and Environmental Studies, Kyoto University
kn-affil=

affil-num=9
en-affil=Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=10
en-affil=Department of Human Life Science, Graduate School of Food and Human Life Science, Osaka City University
kn-affil=

affil-num=11
en-affil=Department of Human Life Science, Graduate School of Food and Human Life Science, Osaka City University,
kn-affil=

affil-num=12
en-affil=Department of Biology, Faculty of Science, Niigata University
kn-affil=

affil-num=13
en-affil=Synthetic biology laboratory, Graduate school of medicine, Osaka City University
kn-affil=

affil-num=14
en-affil=Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University
kn-affil=

affil-num=15
en-affil=Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University
kn-affil=

affil-num=16
en-affil=Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University
kn-affil=

affil-num=17
en-affil=Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University
kn-affil=

affil-num=18
en-affil=Department of Chemistry, Graduate School of Science, Osaka City University
kn-affil=

affil-num=19
en-affil=Department of Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=
END