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https://www.readbyqxmd.com/read/28633564/energy-harvesting-from-the-animal-human-body-for-self-powered-electronics
#1
Canan Dagdeviren, Zhou Li, Zhong Lin Wang
Living subjects (i.e., humans and animals) have abundant sources of energy in chemical, thermal, and mechanical forms. The use of these energies presents a viable way to overcome the battery capacity limitation that constrains the long-term operation of wearable/implantable devices. The intersection of novel materials and fabrication techniques offers boundless possibilities for the benefit of human health and well-being via various types of energy harvesters. This review summarizes the existing approaches that have been demonstrated to harvest energy from the bodies of living subjects for self-powered electronics...
June 21, 2017: Annual Review of Biomedical Engineering
https://www.readbyqxmd.com/read/28631474/a-flexible-dual-mode-tactile-sensor-derived-from-three-dimensional-porous-carbon-architecture
#2
Zifeng Wang, Ruijuan Jiang, Guangming Li, Yiyan Chen, Zijie Tang, Yukun Wang, Zhuoxin Liu, Hongbo Jiang, Chunyi Zhi
Detecting and monitoring varieties of human activities is one of the most essential functions and design purposes of different kinds of wearable sensors. Apart from excellent sensitivity and durability, limited by the materials, most of the sensors reported in the literatures are only capable of detecting signals based on sole mechanism. In this work, a dual-mode flexible sensor derived from high temperature pyrolysized 3D carbon sponge (C-Sponge) was proposed as peculiar sensor materials that are able to detect human activities based on fundamentally different mechanisms, either by triboelectric effect or by piezoresistive effect...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28630968/designing-self-powered-materials-systems-that-perform-pattern-recognition
#3
Yan Fang, Victor V Yashin, Steven P Levitan, Anna C Balazs
Inspired by the advances in both materials and computer science, we describe efforts to design "materials that compute" where the material and the computer are the same entity. Using theory and simulation, we devise systems that integrate the behavior of self-oscillating gels and fundamental concepts from oscillator-based computing. We specifically focus on gels that undergo the Belousov-Zhabotinsky (BZ) reaction and thus exhibit self-sustained oscillations. In our models, we couple the BZ gel to an overlaying piezoelectric (PZ) cantilever to create a BZ-PZ unit...
June 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28626624/biocompatibility-and-in-vivo-operation-of-implantable-mesoporous-pvdf-based-nanogenerators
#4
Yanhao Yu, Haiyan Sun, Hakan Orbay, Feng Chen, Christopher G England, Weibo Cai, Xudong Wang
The rapid developments of implantable biomedical electronics give rise to the motivation of exploring efficient and durable self-powered charging system. In this paper, we report a mesoporous polyvinylidene fluoride (PVDF)-based implantable piezoelectric nanogenerator (NG) for in vivo biomechanical energy harvesting. The NG was built with a sponge-like mesoporous PVDF film and encapsulated by polydimethylsiloxane (PDMS). After embedding this NG into rodents, a Voc of ~200 mV was produced from the gentle movement of rodent muscle...
September 2016: Nano Energy
https://www.readbyqxmd.com/read/28613808/sensitivity-enhanced-wearable-active-voiceprint-sensor-based-on-cellular-polypropylene-piezoelectret
#5
Wenbo Li, Sheng Zhao, Nan Wu, Junwen Zhong, Bo Wang, Shizhe Lin, Shuwen Chen, Fang Yuan, Hulin Jiang, Yongjun Xiao, Bin Hu, Jun Zhou
Wearable active sensors have extensive applications in mobile biosensing and human-machine interaction but require good flexibility, high sensitivity, excellent stability and self-powered feature. In this work, cellular polypropylene (PP) piezoelectret was chosen as the core material of a sensitivity-enhanced wearable active voiceprint sensor (SWAVS) to realize voiceprint recognition. By virtue of dipole orientation control method, the air layers in piezoelectret were efficiently utilized and the current sensitivity was enhanced (from 1...
June 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28613807/er3-fe3-stimulated-electroactive-visible-light-emitting-and-high-dielectric-flexible-pvdf-films-based-piezoelectric-nanogenerators-a-simple-and-superior-self-powered-energy-harvester-with-remarkable-power-density
#6
Nur Amin Hoque, Pradip Thakur, Swagata Roy, Arpan Kool, Biswajoy Bagchi, Prosenjit Biswas, Md Minarul Saikh, Farha Khatun, Sukhen Das, Partha Pratim Ray
Design of energy harvesting unit with superior output characteristics i.e. high power density is of great technological challenge in the present time. Here, a simple, light weight, flexible and cost effective piezoelectric nanogenerators (PENGs) have been fabricated integrating the aluminum electrodes on to Er3+/ Fe3+ stimulated electroactive, visible light emitting and large dielectric PVDF films where ErCl3. 6H2O and Fe(NO3)3 · 9H2O act as the catalytic agents for electroactive β polymorph nucleation and enhancement of dielectric properties...
June 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28612759/nanogenerator-power-output-influence-of-particle-size-and-crystallinity-of-batio3
#7
Gian Nutal Schädli, Robert Büchel, Sotiris E Pratsinis
Lead-free piezoelectric nanogenerators made with BaTiO3 offer an attractive energy harvesting solution towards portable, battery-free medical devices such as self-powered pacemakers. Here, we assembled nanogenerators made of thin, flexible poly(vinylidene fluoride-co-hexafluoropropylene) films containing either polycrystalline BaTiO3 nanoparticles of various sizes or commercial monocrystalline particles of 64 or 278 nm in average diameter. The nanoparticles were prepared by hydrogen-driven flame aerosol technology and had an average diameter of 24-50 nm with an average crystal size of about 10 nm...
July 7, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28603477/mesoporous-piezoelectric-polymer-composite-films-with-tunable-mechanical-modulus-for-harvesting-energy-from-liquid-pressure-fluctuation
#8
Zhiyi Zhang, Chunhua Yao, Yanhao Yu, Zhanglian Hong, Mingjia Zhi, Xudong Wang
Harvesting mechanical energy from biological systems possesses great potential for in vivo powering implantable electronic devices. In this paper, a development of flexible piezoelectric nanogenerator (NG) is reported based on mesoporous poly(vinylidene fluoride) (PVDF) films. Monolithic mesoporous PVDF is fabricated by a template-free sol-gel-based approach at room temperature. By filling the pores of PVDF network with poly(dimethylsiloxane) (PDMS) elastomer, the composite's modulus is effectively tuned over a wide range down to the same level of biological systems...
October 4, 2016: Advanced Functional Materials
https://www.readbyqxmd.com/read/28579695/self-powered-autonomous-biological-oxygen-demand-biosensor-for-online-water-quality-monitoring
#9
Grzegorz Pasternak, John Greenman, Ioannis Ieropoulos
Standard Biological Oxygen Demand (BOD) analysis requires 5 days to complete. To date, microbial fuel cell biosensors used as an alternative method for BOD assessment requires external apparatus, which limits their use for on-line monitoring in remote, off-grid locations. In this study, a self-powered, floating biosensor was developed for online water quality monitoring. This approach eliminated the need for external apparatus and maintenance that would otherwise be required by other techniques. The biosensor was able to detect urine in freshwater and turn ON a visual and sound cues (85 dB)...
June 2017: Sensors and Actuators. B, Chemical
https://www.readbyqxmd.com/read/28574370/self-powered-multiparameter-health-sensor
#10
Andreas Tobola, Heike Leutheuser, Markus Pollak, Peter Spies, Christian Hofmann, Christian Weigand, Bjoern M Eskofier, Georg Fischer
Wearable health sensors are about to change our health system. While several technological improvements have been presented to enhance performance and energy-efficiency, battery runtime is still a critical concern for practical use of wearable biomedical sensor systems. The runtime limitation is directly related to the battery size, which is another concern regarding practicality and customer acceptance. We introduced ULPSEK-Ultra-Low-Power Sensor Evaluation Kit- for evaluation of biomedical sensors and monitoring applications (http://ulpsek...
May 25, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28571834/self-powered-therapeutic-release-from-conducting-polymer-graphene-oxide-films-on-magnesium
#11
Kasey Catt, Huaxiu Li, Victor Hoang, Roland Beard, X Tracy Cui
Magnesium's complete in vivo degradation is appealing for medical implant applications. Rapid corrosion and hydrogen bubble generation along with inflammatory host tissue response have limited its clinical use. Here we electropolymerized a poly(3,4-ethylenedioxythiophene) (PEDOT) and graphene Oxide (GO) film directly on Mg surface. GO acted as nano-drug carrier to carry anti-inflammatory drug dexamethasone (Dex). PEDOT/GO/Dex coatings improved Mg corrosion resistance and decreased the rate of hydrogen production...
May 29, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28558141/self-powered-flexible-and-solution-processable-perovskite-photodetector-based-on-low-cost-carbon-cloth
#12
Haoxuan Sun, Tianyu Lei, Wei Tian, Fengren Cao, Jie Xiong, Liang Li
Flexible perovskite photodetectors are usually constructed on indium-tin-oxide-coated polymer substrates, which are expensive, fragile, and not resistant to high temperature. Herein, for the first time, a high-performance flexible perovskite photodetector is fabricated based on low-cost carbon cloth via a facile solution processable strategy. In this device, perovskite microcrystal and Spiro-OMeTAD (hole transporting material) blended film act as active materials for light detection, and carbon cloth serves as both a flexible substrate and a conductive electrode...
May 30, 2017: Small
https://www.readbyqxmd.com/read/28541034/microfluidic-capillaric-circuit-for-rapid-and-facile-bacteria-detection
#13
Ayokunle Oluwafemi Olanrewaju, Andy Ng, Philippe DeCorwin-Martin, Alessandra Robillard, David Juncker
Urinary tract infections (UTI) are one of the most common bacterial infections and would greatly benefit from a rapid point-of-care diagnostic test. Although significant progress has been made in developing microfluidic systems for nucleic acid and whole bacteria immunoassay tests, their practical application is limited by complex protocols, bulky peripherals, and slow operation. Here we present a microfluidic capillaric circuit (CC) optimized for rapid and automated detection of bacteria in urine. Molds for CCs were constructed using previously established design rules, then 3D-printed and replicated into poly(dimethylsiloxane)...
June 6, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28540727/noiseless-performance-of-prussian-blue-based-bio-sensors-through-power-generation
#14
Maria A Komkova, Elena E Karyakina, Arkady A Karyakin
In contrast to "self-powered" (bio)sensors aiming to generate maximum energy output, we propose the systems with the lowest potential difference between the working and the counter electrodes, which in galvanic mode would provide achievement of the best analytical performance characteristics. Prussian Blue based (bio)sensors known to operate at 0.00 V versus Ag|AgCl reference, in the short-circuit regime generate the current proportional to analyte concentration. Sensitivity and dynamic range of Prussian Blue based (bio)sensors in power generation mode are, respectively, even slightly higher and wider compared to the same (bio)sensors operated in the conventional three-electrode regime powered by a potentiostat...
May 30, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28508862/nanogenerator-based-dual-functional-and-self-powered-thin-patch-loudspeaker-or-microphone-for-flexible-electronics
#15
Wei Li, David Torres, Ramón Díaz, Zhengjun Wang, Changsheng Wu, Chuan Wang, Zhong Lin Wang, Nelson Sepúlveda
Ferroelectret nanogenerators were recently introduced as a promising alternative technology for harvesting kinetic energy. Here we report the device's intrinsic properties that allow for the bidirectional conversion of energy between electrical and mechanical domains; thus extending its potential use in wearable electronics beyond the power generation realm. This electromechanical coupling, combined with their flexibility and thin film-like form, bestows dual-functional transducing capabilities to the device that are used in this work to demonstrate its use as a thin, wearable and self-powered loudspeaker or microphone patch...
May 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28506573/nanogenerators-for-human-body-energy-harvesting
#16
REVIEW
Antonino Proto, Marek Penhaker, Silvia Conforto, Maurizio Schmid
Humans generate remarkable quantities of energy while performing daily activities, but this energy usually dissipates into the environment. Here, we address recent progress in the development of nanogenerators (NGs): devices that are able to harvest such body-produced biomechanical and thermal energies by exploiting piezoelectric, triboelectric, and thermoelectric physical effects. In designing NGs, the end-user's comfort is a primary concern. Therefore, we focus on recently developed materials giving flexibility and stretchability to NGs...
July 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28485449/a-smart-mobile-pouch-as-a-biomechanical-energy-harvester-towards-self-powered-smart-wireless-power-transfer-applications
#17
Arunkumar Chandrasekhar, Nagamalleswara Rao Alluri, M S P Sudhakaran, Young Sun Mok, Sang-Jae Kim
A Smart Mobile Pouch Triboelectric Nanogenerator (SMP-TENG) is introduced as a promising eco-friendly approach for scavenging biomechanical energy for powering next generation intelligent devices and smart phones. This is a cost-effective and robust method for harvesting energy from human motion, by utilizing worn fabrics as a contact material. The SMP-TENG is capable of harvesting energy in two operational modes: lateral sliding and vertical contact and separation. Moreover, the SMP-TENG can also act as a self-powered emergency flashlight and self-powered pedometer during normal human motion...
May 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28473298/maintenance-of-neural-activities-in-torpid-rhinolophus-ferrumequinum-bats-revealed-by-2d-gel-based-proteome-analysis
#18
Qiuyuan Yin, Yijian Zhang, Dong Dong, Ming Lei, Shuyi Zhang, Chen-Chung Liao, Yi-Hsuan Pan
Bats are the only mammals capable of self-powered flying. Many bat species hibernate in winter. A reversible control of cerebral activities is critical for bats to accommodate a repeated torpor-arousal cycle during hibernation. Little is known about the molecular mechanisms that regulate neuronal activities in torpid bats. In this study, Rhinolophus ferrumequinum bat brain proteins were fractionated, and their abundance in active and torpid states was compared. Results of 2D gel-based proteomics showed that 38% of identified proteins with a significant change in abundance are involved in synaptic vesicle recycling and cytoskeletal integrity...
August 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28469179/highly-selective-and-sensitive-self-powered-glucose-sensor-based-on-capacitor-circuit
#19
Gymama Slaughter, Tanmay Kulkarni
Enzymatic glucose biosensors are being developed to incorporate nanoscale materials with the biological recognition elements to assist in the rapid and sensitive detection of glucose. Here we present a highly sensitive and selective glucose sensor based on capacitor circuit that is capable of selectively sensing glucose while simultaneously powering a small microelectronic device. Multi-walled carbon nanotubes (MWCNTs) is chemically modified with pyrroloquinoline quinone glucose dehydrogenase (PQQ-GDH) and bilirubin oxidase (BOD) at anode and cathode, respectively, in the biofuel cell arrangement...
May 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28463363/from-natural-cotton-thread-to-sewable-energy-dense-supercapacitors
#20
Jian Zhi, Oliver Reiser, Youfu Wang, Aiguo Hu
Considering cost and flexibility, cotton thread is an ideal material for the fabrication of wearable and portable electronics. However, the capacitance of cotton thread based supercapacitors remains extremely low (below 50 mF cm(-2)) due to the insufficient capacitive utilization of active materials. In this work, ordered mesoporous carbon (OMC) membranes are rationally coupled with chemical vapour deposition derived graphene (CVD gr), to form a highly conductive carbon coating around cotton yarn. In this material design, OMC membranes act as hydrophilic nanoporous "ion reservoirs" to accumulate sufficient cations from a gel electrolyte, while CVD gr endows the composite thread low liner resistance (3...
May 18, 2017: Nanoscale
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