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Tajitsu Y, Shimda S, Nonomura T, Yanagimoto H, Nakamura S, Ueshima R, Kawanobe M, Nakiri T, Takarada J, Takeuchi O, Nisho R, Takeshita K, Takahashi M, Sugiyama K. Application of Braided Piezoelectric Poly-l-Lactic Acid Cord Sensor to Sleep Bruxism Detection System with Less Physical or Mental Stress. MICROMACHINES 2023; 15:86. [PMID: 38258205 PMCID: PMC10819301 DOI: 10.3390/mi15010086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024]
Abstract
For many years, we have been developing flexible sensors made of braided piezoelectric poly-l-lactic acid (PLLA) fibers that can be tied and untied for practical applications in society. To ensure good quality of sleep, the occurrence of bruxism has been attracting attention in recent years. Currently, there is a need for a system that can easily and accurately measure the frequency of bruxism at home. Therefore, taking advantage of the braided piezoelectric PLLA cord sensor's unique characteristic of being sewable, we aimed to provide a system that can measure the frequency of bruxism using the braided piezoelectric PLLA cord sensor simply sewn onto a bed sheet on which the subject lies down. After many tests using trial and error, the sheet sensor was completed with zigzag stitching. Twenty subjects slept overnight in a hospital room on sheets integrated with a braided piezoelectric PLLA cord. Polysomnography (PSG) was simultaneously performed on these subjects. The results showed that their bruxism could be detected with an accuracy of more than 95% compared with PSG measurements, which can only be performed in a hospital by a physician and are more burdensome for the subjects, with the subjects simply lying on the bed sheet with a braided piezoelectric PLLA cord sensor sewn into it.
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Affiliation(s)
- Yoshiro Tajitsu
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Saki Shimda
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (T.N.)
| | - Takuto Nonomura
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (T.N.)
| | - Hiroki Yanagimoto
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Shun Nakamura
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Ryoma Ueshima
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Miyu Kawanobe
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Takuo Nakiri
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Jun Takarada
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Osaka 564-8680, Japan; (H.Y.); (S.N.); (R.U.); (M.K.); (T.N.); (J.T.)
| | - Osamu Takeuchi
- Faculty of Foreign Language Studies, Kansai University, Osaka 564-8680, Japan;
| | - Rei Nisho
- Teijin Frontier Co., Ltd., Kita, Osaka 530-8605, Japan; (R.N.); (K.T.)
| | - Koji Takeshita
- Teijin Frontier Co., Ltd., Kita, Osaka 530-8605, Japan; (R.N.); (K.T.)
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Lininger A, Palermo G, Guglielmelli A, Nicoletta G, Goel M, Hinczewski M, Strangi G. Chirality in Light-Matter Interaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2107325. [PMID: 35532188 DOI: 10.1002/adma.202107325] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 04/07/2022] [Indexed: 06/14/2023]
Abstract
The scientific effort to control the interaction between light and matter has grown exponentially in the last 2 decades. This growth has been aided by the development of scientific and technological tools enabling the manipulation of light at deeply sub-wavelength scales, unlocking a large variety of novel phenomena spanning traditionally distant research areas. Here, the role of chirality in light-matter interactions is reviewed by providing a broad overview of its properties, materials, and applications. A perspective on future developments is highlighted, including the growing role of machine learning in designing advanced chiroptical materials to enhance and control light-matter interactions across several scales.
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Affiliation(s)
- Andrew Lininger
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Giovanna Palermo
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Alexa Guglielmelli
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Giuseppe Nicoletta
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Madhav Goel
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Michael Hinczewski
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Giuseppe Strangi
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
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Tajitsu Y, Takarada J, Hikichi T, Sugii R, Takatani K, Yanagimoto H, Nakanishi R, Shiomi S, Kitamoto D, Nakiri T, Takeuchi O, Deguchi M, Muto T, Kuroki K, Amano W, Misumi A, Takahashi M, Sugiyama K, Tanabe A, Kamohara S, Nisho R, Takeshita K. Application of Piezoelectric PLLA Braided Cord as Wearable Sensor to Realize Monitoring System for Indoor Dogs with Less Physical or Mental Stress. MICROMACHINES 2023; 14:143. [PMID: 36677204 PMCID: PMC9865504 DOI: 10.3390/mi14010143] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
We attempted to realize a prototype system that monitors the living condition of indoor dogs without physical or mental burden by using a piezoelectric poly-l-lactic acid (PLLA) braided cord as a wearable sensor. First, to achieve flexibility and durability of the piezoelectric PLLA braided cord used as a sensor for indoor dogs, the process of manufacturing the piezoelectric PLLA fiber for the piezoelectric braided cord was studied in detail and improved to achieve the required performance. Piezoelectric PLLA braided cords were fabricated from the developed PLLA fibers, and the finite element method was used to realize an e-textile that can effectively function as a monitoring sensor. As a result, we realized an e-textile that feels similar to a high-grade textile and senses the complex movements of indoor dogs without the use of a complex computer system. Finally, a prototype system was constructed and applied to an actual indoor dog to demonstrate the usefulness of the e-textile as a sensor for indoor dog monitoring.
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Affiliation(s)
- Yoshiro Tajitsu
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Jun Takarada
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Tokiya Hikichi
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Ryoji Sugii
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Kohei Takatani
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Hiroki Yanagimoto
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Riku Nakanishi
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Seita Shiomi
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Daiki Kitamoto
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Takuo Nakiri
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Osamu Takeuchi
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita 5640-8680, Japan
| | - Miki Deguchi
- Tokyo IoT Technology Department, 5G & IoT Engineering Division, Softbank Co., Kaigan, Tokyo 105-7529, Japan
| | - Takanori Muto
- Tokyo IoT Technology Department, 5G & IoT Engineering Division, Softbank Co., Kaigan, Tokyo 105-7529, Japan
| | - Kazuaki Kuroki
- Tokyo IoT Technology Department, 5G & IoT Engineering Division, Softbank Co., Kaigan, Tokyo 105-7529, Japan
| | - Wataru Amano
- Tokyo IoT Technology Department, 5G & IoT Engineering Division, Softbank Co., Kaigan, Tokyo 105-7529, Japan
| | - Ayaka Misumi
- Tokyo IoT Technology Department, 5G & IoT Engineering Division, Softbank Co., Kaigan, Tokyo 105-7529, Japan
| | | | | | - Akira Tanabe
- Renesas Electronics Co., Ltd., Toyosu, Tokyo 135-0061, Japan
| | - Shiro Kamohara
- Renesas Electronics Co., Ltd., Toyosu, Tokyo 135-0061, Japan
| | - Rei Nisho
- Teijin Frontier Co., Ltd., Kita, Osaka 530-8605, Japan
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Tajitsu Y, Takarada J, Takatani K, Nakanishi R, Yanagimoto H, Shiomi S, Nakagawa I, Kawahara I, Nakiri T, Shimda S, Shimura Y, Nonomura T, Kojima K, Ikeguch A, Okayama K, Sakai T, Morioka Y, Takahashi M, Sugiyama K, Nisho R, Takeshita K. A Prototype Sensor System Using Fabricated Piezoelectric Braided Cord for Work-Environment Measurement during Work from Home. MICROMACHINES 2021; 12:966. [PMID: 34442588 PMCID: PMC8400097 DOI: 10.3390/mi12080966] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/07/2021] [Accepted: 08/09/2021] [Indexed: 11/16/2022]
Abstract
We proposed a new prototype sensor system to understand the workload of employees during telework. The goal of sensing using such a system is to index the degree of stress experienced by employees during work and recognize how to improve their work environment. Currently, to realize this, image processing technology with a Web camera is generally used for vital sign sensing. However, it creates a sense of discomfort at work because of a strong sense of surveillance. To truly evaluate a working environment, it is necessary that an employee be unaware of the sensor system and for the system to be as unobtrusive as possible. To overcome these practical barriers, we have developed a new removable piezoelectric sensor incorporated in a piezoelectric poly-L-lactic acid (PLLA) braided cord. This cord is soft and flexible, and it does not cause any discomfort when attached to the cushion cover sheet. Thus, it was possible to measure the workload of an employee working from home without the employee being aware of the presence of a sensor. Additionally, we developed a system for storing data in a cloud system. We succeeded in acquiring continuous long-term data on the vital signs of employees during telework using this system. The analysis of the data revealed a strong correlation between behavior and stress.
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Affiliation(s)
- Yoshiro Tajitsu
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Jun Takarada
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Kohei Takatani
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Riku Nakanishi
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Hiroki Yanagimoto
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Seita Shiomi
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Isamu Nakagawa
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Ikuo Kawahara
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Takuo Nakiri
- Electrical Engineering Department, Graduate School of Science and Engineering, Kansai University, Suita Osaka 564-8680, Japan; (J.T.); (K.T.); (R.N.); (H.Y.); (S.S.); (I.N.); (I.K.); (T.N.)
| | - Saki Shimda
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (Y.S.); (T.N.); (K.K.)
| | - Yoji Shimura
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (Y.S.); (T.N.); (K.K.)
| | - Takuto Nonomura
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (Y.S.); (T.N.); (K.K.)
| | - Kazunori Kojima
- Nishikawa Co., Ltd., Chuo, Tokyo 103-0006, Japan; (S.S.); (Y.S.); (T.N.); (K.K.)
| | - Atsuhisa Ikeguch
- SoftBank Corp., Information Technology Division, Minato, Tokyo 105-7529, Japan; (A.I.); (K.O.); (T.S.); (Y.M.)
| | - Kazuhiro Okayama
- SoftBank Corp., Information Technology Division, Minato, Tokyo 105-7529, Japan; (A.I.); (K.O.); (T.S.); (Y.M.)
| | - Tomohiro Sakai
- SoftBank Corp., Information Technology Division, Minato, Tokyo 105-7529, Japan; (A.I.); (K.O.); (T.S.); (Y.M.)
| | - Yuichi Morioka
- SoftBank Corp., Information Technology Division, Minato, Tokyo 105-7529, Japan; (A.I.); (K.O.); (T.S.); (Y.M.)
| | | | | | - Rei Nisho
- Teijin Frontier Co., Ltd., Kita, Osaka 530-8605, Japan; (R.N.); (K.T.)
| | - Koji Takeshita
- Teijin Frontier Co., Ltd., Kita, Osaka 530-8605, Japan; (R.N.); (K.T.)
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Zaszczyńska A, Gradys A, Sajkiewicz P. Progress in the Applications of Smart Piezoelectric Materials for Medical Devices. Polymers (Basel) 2020; 12:E2754. [PMID: 33266424 PMCID: PMC7700596 DOI: 10.3390/polym12112754] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/19/2020] [Accepted: 11/20/2020] [Indexed: 12/19/2022] Open
Abstract
Smart piezoelectric materials are of great interest due to their unique properties. Piezoelectric materials can transform mechanical energy into electricity and vice versa. There are mono and polycrystals (piezoceramics), polymers, and composites in the group of piezoelectric materials. Recent years show progress in the applications of piezoelectric materials in biomedical devices due to their biocompatibility and biodegradability. Medical devices such as actuators and sensors, energy harvesting devices, and active scaffolds for neural tissue engineering are continually explored. Sensors and actuators from piezoelectric materials can convert flow rate, pressure, etc., to generate energy or consume it. This paper consists of using smart materials to design medical devices and provide a greater understanding of the piezoelectric effect in the medical industry presently. A greater understanding of piezoelectricity is necessary regarding the future development and industry challenges.
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Affiliation(s)
- Angelika Zaszczyńska
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b St., 02-106 Warsaw, Poland; (A.G.); (P.S.)
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Shin DM, Hong SW, Hwang YH. Recent Advances in Organic Piezoelectric Biomaterials for Energy and Biomedical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E123. [PMID: 31936527 PMCID: PMC7023025 DOI: 10.3390/nano10010123] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 12/11/2022]
Abstract
The past decade has witnessed significant advances in medically implantable and wearable devices technologies as a promising personal healthcare platform. Organic piezoelectric biomaterials have attracted widespread attention as the functional materials in the biomedical devices due to their advantages of excellent biocompatibility and environmental friendliness. Biomedical devices featuring the biocompatible piezoelectric materials involve energy harvesting devices, sensors, and scaffolds for cell and tissue engineering. This paper offers a comprehensive review of the principles, properties, and applications of organic piezoelectric biomaterials. How to tackle issues relating to the better integration of the organic piezoelectric biomaterials into the biomedical devices is discussed. Further developments in biocompatible piezoelectric materials can spark a new age in the field of biomedical technologies.
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Affiliation(s)
- Dong-Myeong Shin
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong 999077, China
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University (PNU), Busan 46241, Korea;
| | - Yoon-Hwae Hwang
- Department of Nanoenergy Engineering & BK21 PLUS Nanoconvergence Technology Division, Pusan National University (PNU), Busan 46241, Korea;
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Nobeshima T, Sakai H, Ishii Y, Uemura S, Yoshida M. Polarized FT-IR Study of Uniaxially Aligned Electrospun Poly(DL-Lactic Acid) Fiber Films. J PHOTOPOLYM SCI TEC 2016. [DOI: 10.2494/photopolymer.29.353] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Taiki Nobeshima
- National Institute of Advanced Industrial Science and Technology
| | | | | | - Sei Uemura
- National Institute of Advanced Industrial Science and Technology
| | - Manabu Yoshida
- National Institute of Advanced Industrial Science and Technology
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Nobeshima T, Ishii Y, Sakai H, Uemura S, Yoshida M. Study of Thermally Stimulated Current in Fibrous Poly(DL-Lactic Acid) Films Exhibiting Piezoelectric-Like Behavior. J PHOTOPOLYM SCI TEC 2015. [DOI: 10.2494/photopolymer.28.369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Taiki Nobeshima
- National Institute of Advanced Industrial Science and Technology
| | | | | | - Sei Uemura
- National Institute of Advanced Industrial Science and Technology
| | - Manabu Yoshida
- National Institute of Advanced Industrial Science and Technology
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New design of actuator using shear piezoelectricity of a chiral polymer, and prototype device. POLYM INT 2010. [DOI: 10.1002/pi.2758] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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