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Article ; Online: Adhesive Sulfabetaine Polymer Hydrogels for the Sandwich Cell Culture.

Morimoto, Nobuyuki / Murata, Atsuki / Yamamoto, Yuta / Narita, Fumio / Yamamoto, Masaya

ACS omega

2024 Volume 9, Issue 10, Page(s) 11942–11949

Abstract: Sandwich culture systems are techniques that cultivate cells by sandwiching them between the top and bottom substrates. Since the substrates can be separated, the system is expected to be applied to the construct layering of patterned cells and to the ... ...

Abstract	Sandwich culture systems are techniques that cultivate cells by sandwiching them between the top and bottom substrates. Since the substrates can be separated, the system is expected to be applied to the construct layering of patterned cells and to the isolation of stacked cells. In this study, we prepared hydrogels composed of zwitterionic sulfabetaine polymers, poly[2-(2-(methacryloyloxyethyl)dimethylammonio)ethyl-1-sulfate] (PZBMA). The ZBMA homopolymers have been shown to form aggregates in aqueous solutions due to their intermolecular interactions. The water content of the PZBMA hydrogels in water was ∼70% regardless of
Language	English
Publishing date	2024-03-03
Publishing country	United States
Document type	Journal Article
ISSN	2470-1343
ISSN (online)	2470-1343
DOI	10.1021/acsomega.3c09708
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Fabrication, Evaluation, and Multiscale Simulation of Piezoelectric Composites Reinforced Using Unidirectional Carbon Fibers for Flexible Motion Sensors.

Yu, Yaonan / Luo, Chao / Suto, Takayuki / Uetsuji, Yasutomo / Narita, Fumio

Small (Weinheim an der Bergstrasse, Germany)

2023 , Page(s) e2307689

Abstract: Piezoelectric composite materials can convert mechanical energy into electrical energy, thus promoting battery-free motion-sensing systems. However, their substandard mechanical performance limits the capability of sensors developed using flexible ... ...

Abstract	Piezoelectric composite materials can convert mechanical energy into electrical energy, thus promoting battery-free motion-sensing systems. However, their substandard mechanical performance limits the capability of sensors developed using flexible piezoelectric materials. This study introduces a novel design strategy for preparing high-strength flexible piezoelectric composite materials comprising unidirectional carbon fiber-reinforced potassium sodium niobate (K
Language	English
Publishing date	2023-12-14
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2168935-0
ISSN	1613-6829 ; 1613-6810
ISSN (online)	1613-6829
ISSN	1613-6810
DOI	10.1002/smll.202307689
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Evaluation of Electromechanical Properties and Conversion Efficiency of Piezoelectric Nanocomposites with Carbon-Fiber-Reinforced Polymer Electrodes for Stress Sensing and Energy Harvesting.

Yu, Yaonan / Narita, Fumio

Polymers

2021 Volume 13, Issue 18

Abstract: Wireless sensor networks are the future development direction for realizing an Internet of Things society and have been applied in bridges, buildings, spacecraft, and other areas. Nevertheless, with application expansion, the requirements for material ... ...

Abstract	Wireless sensor networks are the future development direction for realizing an Internet of Things society and have been applied in bridges, buildings, spacecraft, and other areas. Nevertheless, with application expansion, the requirements for material performance also increase. Although the development of carbon-fiber-reinforced polymer (CFRP) to achieve these functions is challenging, it has attracted attention because of its excellent performance. This study combined the CFRP electrode with epoxy resin containing potassium sodium niobate piezoelectric nanoparticles and successfully polarized the composite sample. Furthermore, a three-point bending method was applied to compare the bending behavior of the samples. The peak output voltage produced by the maximum bending stress of 98.4 MPa was estimated to be 0.51 mV. Additionally, a conversion efficiency of 0.01546% was obtained. The results showed that the piezoelectric resin with CFRPs as the electrode exhibited stress self-inductance characteristics. This study is expected to be applied in manufacturing self-sensing piezoelectric resin/CFRP composite materials, paving the way for developing stable and efficient self-sensing structures and applications.
Language	English
Publishing date	2021-09-19
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym13183184
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Negative magnetostrictive paper formed by dispersing CoFe

Keino, Takumi / Rova, Lovisa / Gallet-Pandellé, Alia / Kurita, Hiroki / Narita, Fumio

Scientific reports

2023 Volume 13, Issue 1, Page(s) 6144

Abstract: Polymers are often combined with magnetostrictive materials to enhance their toughness. This study reports a cellulose nanofibril (CNF)-based composite paper containing dispersed ... ...

Abstract	Polymers are often combined with magnetostrictive materials to enhance their toughness. This study reports a cellulose nanofibril (CNF)-based composite paper containing dispersed CoFe
Language	English
Publishing date	2023-04-15
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-31655-z
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Article ; Online: Evaluation of Electromechanical Properties and Conversion Efficiency of Piezoelectric Nanocomposites with Carbon-Fiber-Reinforced Polymer Electrodes for Stress Sensing and Energy Harvesting

Yaonan Yu / Fumio Narita

Polymers, Vol 13, Iss 3184, p

2021 Volume 3184

Abstract	Wireless sensor networks are the future development direction for realizing an Internet of Things society and have been applied in bridges, buildings, spacecraft, and other areas. Nevertheless, with application expansion, the requirements for material performance also increase. Although the development of carbon-fiber-reinforced polymer (CFRP) to achieve these functions is challenging, it has attracted attention because of its excellent performance. This study combined the CFRP electrode with epoxy resin containing potassium sodium niobate piezoelectric nanoparticles and successfully polarized the composite sample. Furthermore, a three-point bending method was applied to compare the bending behavior of the samples. The peak output voltage produced by the maximum bending stress of 98.4 MPa was estimated to be 0.51 mV. Additionally, a conversion efficiency of 0.01546% was obtained. The results showed that the piezoelectric resin with CFRPs as the electrode exhibited stress self-inductance characteristics. This study is expected to be applied in manufacturing self-sensing piezoelectric resin/CFRP composite materials, paving the way for developing stable and efficient self-sensing structures and applications.
Keywords	piezoelectricity ; laminated beam theory ; bending test ; piezoelectric nanocomposites ; stress sensor ; energy harvester ; Organic chemistry ; QD241-441
Subject code	600
Language	English
Publishing date	2021-09-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Does intensity-modulated radiation therapy by helical tomotherapy for prostate cancer increase the subsequent risk of bladder cancer? A propensity score-matched analysis.

Tsukuda, Fumio / Tanaka, Yasunari / Narita, Shuichiro / Shimizu, Toshihiro / Nakasuka, Shu / Hagiwara, Kiichi / Sakamoto, Noboru / Toshihiro, Kawano / Horiguchi, Yutaka / Koga, Shoji

International journal of urology : official journal of the Japanese Urological Association

2024 Volume 31, Issue 4, Page(s) 379–385

Abstract: Objectives: This study aimed to evaluate the risk of bladder cancer after intensity-modulated radiation therapy (IMRT) using helical tomotherapy for prostate cancer in comparison to the risk post-radical prostatectomy (RP) using propensity score-matched ...

Abstract	Objectives: This study aimed to evaluate the risk of bladder cancer after intensity-modulated radiation therapy (IMRT) using helical tomotherapy for prostate cancer in comparison to the risk post-radical prostatectomy (RP) using propensity score-matched analysis and to assess the risk factors for bladder cancer. Methods: This retrospective study included 2067 patients with non-metastatic prostate cancer treated at our institution between June 2007 and December 2016. Of these, 1547 patients were treated with IMRT and 520 underwent RP. The propensity scores were calculated using age, National Comprehensive Cancer Network risk classification, prostate volume, Brinkman index, and follow-up time as matched covariates. A propensity score-matched patient cohort (n = 718; IMRT: 359, RP: 359) was created, and the risk of bladder cancer after treatment was compared. Results: In total, bladder cancer was detected in 33 patients. Five patients in the IMRT group and one in the RP group died of bladder cancer. In the propensity score-matched analysis, the 5-year bladder cancer-free survival rate was significantly lower in the IMRT group than in the RP group (91.7% and 96.2%, respectively; p < 0.001). Multivariate analysis revealed that IMRT and the Brinkman index were the risk factors for bladder cancer in this cohort (odds ratio = 5.085, 95% confidence interval = 1.436-18.008, p = 0.012 and odds ratio = 1.001, 95% confidence interval = 1.000-1.001, p = 0.010, respectively). Conclusions: IMRT for prostate cancer using helical tomotherapy increases the subsequent risk of bladder cancer compared with RP and is an independent risk factor for bladder cancer similar to smoking.
MeSH term(s)	Male ; Humans ; Radiotherapy, Intensity-Modulated/adverse effects ; Propensity Score ; Retrospective Studies ; Prostatic Neoplasms/epidemiology ; Prostatic Neoplasms/radiotherapy ; Prostatic Neoplasms/pathology ; Urinary Bladder Neoplasms/epidemiology ; Urinary Bladder Neoplasms/etiology ; Urinary Bladder Neoplasms/radiotherapy
Language	English
Publishing date	2024-01-09
Publishing country	Australia
Document type	Journal Article
ZDB-ID	1328401-0
ISSN	1442-2042 ; 0919-8172
ISSN (online)	1442-2042
ISSN	0919-8172
DOI	10.1111/iju.15373
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Negative magnetostrictive paper formed by dispersing CoFe2O4 particles in cellulose nanofibrils

Takumi Keino / Lovisa Rova / Alia Gallet--Pandellé / Hiroki Kurita / Fumio Narita

Scientific Reports, Vol 13, Iss 1, Pp 1-

2023 Volume 11

Abstract: Abstract Polymers are often combined with magnetostrictive materials to enhance their toughness. This study reports a cellulose nanofibril (CNF)-based composite paper containing dispersed CoFe2O4 particles (CNF–CoFe2O4). Besides imparting magnetization ... ...

Abstract	Abstract Polymers are often combined with magnetostrictive materials to enhance their toughness. This study reports a cellulose nanofibril (CNF)-based composite paper containing dispersed CoFe2O4 particles (CNF–CoFe2O4). Besides imparting magnetization and magnetostriction, the incorporation of CoFe2O4 particles decreased the ultimate tensile strength and increased the fracture elongation of the CNF–CoFe2O4 composite paper. CNF was responsible for the tensile properties of CNF–CoFe2O4 composite paper. Consequently, the magnetic and magnetostrictive properties and tensile properties of CNF–CoFe2O4 composite paper can be controlled by changing the mixture ratio of CNF and CoFe2O4 particles.
Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2023-04-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Design and finite element simulation of metal-core piezoelectric fiber/epoxy matrix composites for virus detection.

Wang, Yinli / Shi, Yu / Narita, Fumio

Sensors and actuators. A, Physical

2021 Volume 327, Page(s) 112742

Abstract: Undoubtedly, the coronavirus disease 2019 (COVID-19) has received the greatest concern with a global impact, and this situation will continue for a long period of time. Looking back in history, airborne transimission diseases have caused huge casualties ... ...

Abstract	Undoubtedly, the coronavirus disease 2019 (COVID-19) has received the greatest concern with a global impact, and this situation will continue for a long period of time. Looking back in history, airborne transimission diseases have caused huge casualties several times. COVID-19 as a typical airborne disease caught our attention and reminded us of the importance of preventing such diseases. Therefore, this study focuses on finding a new way to guard against the spread of these diseases such as COVID-19. This paper studies the dynamic electromechanical response of metal-core piezoelectric fiber/epoxy matrix composites, designed as mass load sensors for virus detection, by numerical modelling. The dynamic electromechanical response is simulated by applying an alternating current (AC) electric field to make the composite vibrate. Furthermore, both concentrated and distributed loads are considered to assess the sensitivity of the biosensor during modelling of the combination of both biomarker and viruses. The design parameters of this sensor, such as the resonant frequency, the position and size of the biomarker, will be studied and optimized as the key values to determine the sensitivity of detection. The novelty of this work is to propose functional composites that can detect the viruses from changes of the output voltage instead of the resonant frequency change using piezoelectric sensor and piezoelectric actuator. The contribution of this detection method will significantly shorten the detection time as it avoids fast Fourier transform (FFT) or discrete Fourier transform (DFT). The outcome of this research offers a reliable numerical model to optimize the design of the proposed biosensor for virus detection, which will contribute to the production of high-performance piezoelectric biosensors in the future.
Language	English
Publishing date	2021-04-07
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	1026063-8
ISSN	0924-4247
ISSN	0924-4247
DOI	10.1016/j.sna.2021.112742
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Article ; Online: Electric polarization and crystal orientation of lead zirconate titanate under mechanical stress due to embedding in a metal matrix

Tetsuro Yanaseko / Hiroshi Sato / Fumio Narita / Hiroshi Asanuma

SN Applied Sciences, Vol 3, Iss 10, Pp 1-

2021 Volume 8

Abstract: Abstract The mechanical characteristics of piezoelectric ceramic fibers can be improved by embedding the fibers in a metal matrix. The compressive stress generated during the embedding process, however, limits the polarization of piezoelectric ceramic ... ...

Abstract	Abstract The mechanical characteristics of piezoelectric ceramic fibers can be improved by embedding the fibers in a metal matrix. The compressive stress generated during the embedding process, however, limits the polarization of piezoelectric ceramic composites. To study and determine the relationship between the mechanical and piezoelectric properties of piezoelectric ceramics, we analyzed the crystallographic orientation of piezoelectric ceramics embedded in an aluminum matrix via electron backscatter diffraction. The orientation of the crystals before and after the polarization of the piezoelectric fibers, in which residual stresses were generated during embedding, was evaluated. Furthermore, the residual stresses were reduced by heat treatment, and the resultant angle of orientation was evaluated before and after polarization. Results showed that, as the residual stresses were relieved, the orientation of the piezoelectric ceramic crystals changed to reveal increased polarization. Our analysis shows that the crystal orientation of piezoelectric ceramics is impacted by the residual compressive stress that arises from embedding the piezoelectric fiber in the aluminum matrix; it also illustrates the hindering effect of residual stress on the polarization of piezoelectric ceramics.
Keywords	Piezoelectric ceramic fiber ; Compressive stress ; Residual stress ; Crystallographic orientation analysis ; Aluminum matrix ; Science ; Q ; Technology ; T
Subject code	500
Language	English
Publishing date	2021-09-01T00:00:00Z
Publisher	Springer
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Carbon Fiber-Reinforced Piezoelectric Nanocomposites: Design, Fabrication and Evaluation for Damage Detection and Energy Harvesting

Yu, Yaonan / Shi, Yu / Kurita, Hiroki / Jia, Yu / Wang, Zhenjin / Narita, Fumio

Composites Part A. 2023, p.107587-

2023 , Page(s) 107587–

Abstract: Carbon fiber-reinforced polymers (CFRPs) can be used in aging infrastructures as a reinforcement because of their excellent mechanical properties, and they can also be used in the support maintenance and repair work of these structures. However, the ... ...

Abstract	Carbon fiber-reinforced polymers (CFRPs) can be used in aging infrastructures as a reinforcement because of their excellent mechanical properties, and they can also be used in the support maintenance and repair work of these structures. However, the development of CFRPs as reinforcement while achieving self-powered damage detection is still challenging. Herein, a sodium potassium niobate (KNN) nanoparticle-filled epoxy (KNN-EP) film was fabricated and combined with advanced CFRP electrodes. The obtained composites exhibited dramatically enhanced mechanical properties. In addition, CFRP contributed to the energy harvesting output (peak-to-peak output voltage Vpp = 7.25 mV), which was over 600% higher than that of the KNN-EP. Thus, this composite could work as a force sensor for damage detection. In the end-notch bending test, the voltage signals generated by CFRP/KNN-EP accurately corresponded to the crack growth, which could provide the real-time crack state and prediction of fracture occurrence. Therefore, this work provided a new strategy for structural enhancement and kinetic energy harvesting, which can be used to detect damage behavior in infrastructures.
Keywords	carbon ; electric potential difference ; epoxides ; kinetic energy ; maintenance and repair ; nanocomposites ; potassium ; prediction ; sodium ; Piezoelectricity ; Carbon Fiber-Reinforced Polymers Electrode ; End-Notched Flexure ; Damage Detection
Language	English
Publishing place	Elsevier Ltd
Document type	Article ; Online
Note	Pre-press version ; Use and reproduction
ZDB-ID	2012223-8
ISSN	1359-835X
ISSN	1359-835X
DOI	10.1016/j.compositesa.2023.107587
Database	NAL-Catalogue (AGRICOLA)

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