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https://www.readbyqxmd.com/read/27925317/toward-arbitrary-direction-energy-harvesting-through-flexible-piezoelectric-nanogenerators-using-perovskite-pbtio3-nanotube-arrays
#1
Young Bum Lee, Jin Kyu Han, Suttinart Noothongkaew, Seong Ku Kim, Wooseok Song, Sung Myung, Sun Sook Lee, Jongsun Lim, Sang Don Bu, Ki-Seok An
New fiber-type piezoelectric nanogenerator devices consisting of radially aligned perovskite PbTiO3 nanotubes are designed for energy harvesting from arbitrary mechanical motion. The free-standing fiber-type nanogenerators generate constant amount of electric power by bending or wind motion regardless of direction, thus, extending the possibility of their practical applications.
December 7, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27925299/biomimicking-of-a-swim-bladder-and-its-application-as-a-mini-generator
#2
Mengmeng Song, Mengjiao Cheng, Meng Xiao, Lina Zhang, Guannan Ju, Feng Shi
A model fish with man-made swim bladder achieves fast vertical motions based on density adjustments in a pressure-responsive way. When exposed to a magnetic field, a mini-generator is achieved by harvesting energy from the environment, working with pressure differences in the blood pressure range and at the frequency of a beating heart.
December 7, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27924857/electrohydrodynamic-assisted-assembly-of-hierarchically-structured-3d-crumpled-nanostructures-for-efficient-solar-conversions
#3
Hidetaka Ishihara, Yen-Chang Chen, Nicholas De Marco, Oliver Lin, Chih-Meng Huang, Vipawee Limsakoune, Yi-Chia Chou, Yang Yang, Vincent Tung
The tantalizing prospect of harnessing the unique properties of graphene crumpled nanostructures continues to fuel tremendous interest in energy storage and harvesting applications. However, the paper ball-like, hard texture, and closed-sphere morphology of current 3D graphitic nanostructure production not only constricts the conductive pathways but also limits the accessible surface area. Here, we report new insights into electrohydrodynamically-generated droplets as colloidal nanoreactors in that the stimuli-responsive nature of reduced graphene oxide can lead to the formation of crumpled nanostructures with a combination of open structures and doubly curved, saddle-shaped edges...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924313/a-compartmentalized-out-of-equilibrium-enzymatic-reaction-network-for-sustained-autonomous-movement
#4
Marlies Nijemeisland, Loai K E A Abdelmohsen, Wilhelm T S Huck, Daniela A Wilson, Jan C M van Hest
Every living cell is a compartmentalized out-of-equilibrium system exquisitely able to convert chemical energy into function. In order to maintain homeostasis, the flux of metabolites is tightly controlled by regulatory enzymatic networks. A crucial prerequisite for the development of lifelike materials is the construction of synthetic systems with compartmentalized reaction networks that maintain out-of-equilibrium function. Here, we aim for autonomous movement as an example of the conversion of feedstock molecules into function...
November 23, 2016: ACS Central Science
https://www.readbyqxmd.com/read/27919227/high-light-stress-triggers-distinct-proteomic-responses-in-the-marine-diatom-thalassiosira-pseudonana
#5
Hong-Po Dong, Yue-Lei Dong, Lei Cui, Srinivasan Balamurugan, Jian Gao, Song-Hui Lu, Tao Jiang
BACKGROUND: Diatoms are able to acclimate to frequent and large light fluctuations in the surface ocean waters. However, the molecular mechanisms underlying these acclimation responses of diaotms remain elusive. RESULTS: In this study, we investigated the mechanism of high light protection in marine diatom Thalassiosira pseudonana using comparative proteomics in combination with biochemical analyses. Cells treated under high light (800 μmol photons m(-2)s(-1)) for 10 h were subjected to proteomic analysis...
December 5, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27918424/optimized-energy-harvesting-cluster-head-selection-and-channel-allocation-for-iots-in-smart-cities
#6
Saleem Aslam, Najam Ul Hasan, Ju Wook Jang, Kyung-Geun Lee
This paper highlights three critical aspects of the internet of things (IoTs), namely (1) energy efficiency, (2) energy balancing and (3) quality of service (QoS) and presents three novel schemes for addressing these aspects. For energy efficiency, a novel radio frequency (RF) energy-harvesting scheme is presented in which each IoT device is associated with the best possible RF source in order to maximize the overall energy that the IoT devices harvest. For energy balancing, the IoT devices in close proximity are clustered together and then an IoT device with the highest residual energy is selected as a cluster head (CH) on a rotational basis...
December 2, 2016: Sensors
https://www.readbyqxmd.com/read/27918416/a-touch-sensing-technique-using-the-effects-of-extremely-low-frequency-fields-on-the-human-body
#7
Hatem Elfekey, Hany Ayad Bastawrous, Shogo Okamoto
Touch sensing is a fundamental approach in human-to-machine interfaces, and is currently under widespread use. Many current applications use active touch sensing technologies. Passive touch sensing technologies are, however, more adequate to implement low power or energy harvesting touch sensing interfaces. This paper presents a passive touch sensing technique based on the fact that the human body is affected by the surrounding extremely low frequency (ELF) electromagnetic fields, such as those of AC power lines...
December 2, 2016: Sensors
https://www.readbyqxmd.com/read/27917177/progress-on-optimizing-miscanthus-biomass-production-for-the-european-bioeconomy-results-of-the-eu-fp7-project-optimisc
#8
Iris Lewandowski, John Clifton-Brown, Luisa M Trindade, Gerard C van der Linden, Kai-Uwe Schwarz, Karl Müller-Sämann, Alexander Anisimov, C-L Chen, Oene Dolstra, Iain S Donnison, Kerrie Farrar, Simon Fonteyne, Graham Harding, Astley Hastings, Laurie M Huxley, Yasir Iqbal, Nikolay Khokhlov, Andreas Kiesel, Peter Lootens, Heike Meyer, Michal Mos, Hilde Muylle, Chris Nunn, Mensure Özgüven, Isabel Roldán-Ruiz, Heinrich Schüle, Ivan Tarakanov, Tim van der Weijde, Moritz Wagner, Qingguo Xi, Olena Kalinina
This paper describes the complete findings of the EU-funded research project OPTIMISC, which investigated methods to optimize the production and use of miscanthus biomass. Miscanthus bioenergy and bioproduct chains were investigated by trialing 15 diverse germplasm types in a range of climatic and soil environments across central Europe, Ukraine, Russia, and China. The abiotic stress tolerances of a wider panel of 100 germplasm types to drought, salinity, and low temperatures were measured in the laboratory and a field trial in Belgium...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27912153/overground-vs-treadmill-walking-on-biomechanical-energy-harvesting-an-energetics-and-emg-study
#9
Jean-Paul Martin, Qingguo Li
A biomechanical energy harvester is a wearable device that generates electricity from human motion. Walking on a treadmill has been used almost exclusively by researchers for studying the energetic effects of biomechanical energy harvesters and wearable robotics. A treadmill provides the advantage of having long duration trials within a stationary motion capture volume. However, no consensus exists on whether the results from treadmill walking accurately represent overground walking. We aim to investigate how a biomechanical energy harvester performs overground compared to on a treadmill by measuring energy expenditure and muscle activity...
November 19, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27911134/split-face-histological-and-biochemical-evaluation-of-tightening-efficacy-using-temperature-and-impedance-controlled-continuous-non-invasive-radiofrequency-energy
#10
Sylvie Boisnic, Marc Divaris, Marie-Christine Branchet, Andrew Anthony Nelson
BACKGROUND: Bi-polar radiofrequency (RF) is capable of heating dermal collagen fibers and inducing skin tightening by collagen remodelling. OBJECTIVE: To substantiate safety and improvement of skin laxity following skin heating with a novel temperature and impedance controlled non-invasive radiofrequency (RF) device by histological and biochemical evaluations. METHODS: A split-face study was performed on 4 subjects that underwent 8 weekly RF sessions on one side of their face, leaving the other side an untreated control and then underwent face-lift procedure...
December 2, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27910921/bipolar-and-unipolar-silylene-diphenylene-%C3%AF-%C3%AF-conjugated-polymer-route-for-highly-efficient-electrophosphorescence
#11
Yao-Tang Chang, Sunil Sharma, Miao-Ken Hung, Yu-Hsuan Lee, Show-An Chen
σ-π conjugated polymer strategy is proposed for designing electroluminescent host polymers with silylene-diphenylene as the backbone repeat unit giving a high triplet energy (ET = 2.67 eV). By incorporation of high ET (3.0 eV) electron (oxadiazole, OXD) and hole (triphenyl amine, TPA) transport moieties, or TPA alone (in this case, the main chain acts as electron transport channel) as side arms on the silylene, the high ET bipolar and unipolar polymers are formed, allowing a use of iridium green phosphor (Ir(ppy)2(acac), Ir-G) (ET = 2...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910368/airfoil-based-electromagnetic-energy-harvester-containing-parallel-array-motion-between-moving-coil-and-multi-pole-magnets-towards-enhanced-power-density
#12
Chung Ming Leung, Ya Wang, Wusi Chen
In this letter, the airfoil-based electromagnetic energy harvester containing parallel array motion between moving coil and trajectory matching multi-pole magnets was investigated. The magnets were aligned in an alternatively magnetized formation of 6 magnets to explore enhanced power density. In particular, the magnet array was positioned in parallel to the trajectory of the tip coil within its tip deflection span. The finite element simulations of the magnetic flux density and induced voltages at an open circuit condition were studied to find the maximum number of alternatively magnetized magnets that was required for the proposed energy harvester...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27898856/the-effect-of-zilpaterol-hydrochloride-supplementation-on-energy-metabolism-and-nitrogen-and-carbon-retention-of-steers-fed-at-maintenance-and-fasting-intake-levels
#13
L J Walter, N A Cole, J S Jennings, J P Hutcheson, B E Meyer, A N Schmitz, D D Reed, T E Lawrence
An indirect calorimetry trial examined energy metabolism, apparent nutrient digestibility, C retention (CR), and N retention (NR) of cattle supplemented with zilpaterol hydrochloride (ZH). Beef steers ( = 20; 463 ± 14 kg) blocked ( = 5) by weight and source were individually fed and adapted to maintenance energy intake for 21 d before allotment to ZH (90 mg/steer∙d) or no β-adrenergic agonist treatment (control [CONT]) for 20 d (455 ± 14 kg at the start of treatment). Respiration chambers = 4 were used to quantify heat production (HP) during maintenance (d 12 to 16 of the ZH period) and fasting heat production (FHP; d 19 to 20 of ZH period; total 4 d of fast)...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898301/an-energy-harvesting-type-ultrasonic-motor
#14
Guangqing Wang, Wentan Xu, Shuaishuai Gao, Binqiang Yang, Guoli Lu
An energy harvesting type ultrasonic motor is presented in this work. The novel motor not only can drive and/or position the motion mechanism, but also can harvest and convert the vibration-induced energy of the stator into electric energy to power small electronic devices. In the new motor, the stator is a sandwich structure of two PZT rings and an elastic metal body. The PZT ring bonded on the bottom surface is used to excite the stator metal body to generate a traveling wave with converse piezoelectric effect, and the other PZT ring bonded on top surface is used to harvest and convert the vibration-induced energy of the stator into electric energy with direct piezoelectric effect...
November 16, 2016: Ultrasonics
https://www.readbyqxmd.com/read/27897284/ytterbium-erbium-ion-doped-strontium-molybdate-srmoo4-synthesis-characterization-photophysical-properties-and-application-in-solar-cells
#15
Weifu Sun, Zihan Chen, Junli Zhou, Dongyu Li, Zhen Huang, Xiao Jin, Qin Zhang, Feng Li, Qinghua Li
In this work, ytterbium-erbium co-doped strontium molybdate (SrMoO4, SMO) nanophosphors (NPs), denoted as SMO:Yb/Er, have been successfully prepared. These NPs were then incorporated into TiO2 acceptor films in hybrid solar cells to enhance light harvesting by virtue of an up-conversion process where low energy photons can be converted into high energy photons through multi-photon processes. The results showed that the SMO:Yb/Er single crystal NPs are capable of turning near infrared photons into visible ones that can be easily captured by poly(thieno[3,4-b]-thiophene/benzodithiophene) (PTB7)...
November 29, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27897135/improved-dielectric-constant-and-breakdown-strength-of-%C3%AE-phase-dominant-super-toughened-polyvinylidene-fluoride-tio2-nanocomposite-film-an-excellent-material-for-energy-storage-applications-and-piezoelectric-throughput
#16
Md Mehebub Alam, Sujoy Kumar Ghosh, Debabrata Sarkar, Shrabanee Sen, Dipankar Mandal
Titanium dioxide (TiO2) nanoparticles (NPs) embedded γ-phase containing polyvinylidene fluoride (PVDF) nanocomposite (PNC) film turns to an excellent material for energy storage application due to an increased dielectric constant (32 at 1 kHz), enhanced electric breakdown strength (400 MV m(-1)). It also exhibits a high energy density of 4 J cm(-3) which is 25 times higher than that of virgin PVDF. 98% of the electroactive γ-phase has been acheived by the incorporation of TiO2 NPs and the resulting PNC behaves like a super-toughened material due to a dramatic improvement (more than 80%) in the tensile strength...
January 6, 2017: Nanotechnology
https://www.readbyqxmd.com/read/27892963/stress-wave-propagation-in-two-dimensional-buckyball-lattice
#17
Jun Xu, Bowen Zheng
Orderly arrayed granular crystals exhibit extraordinary capability to tune stress wave propagation. Granular system of higher dimension renders many more stress wave patterns, showing its great potential for physical and engineering applications. At nanoscale, one-dimensionally arranged buckyball (C60) system has shown the ability to support solitary wave. In this paper, stress wave behaviors of two-dimensional buckyball (C60) lattice are investigated based on square close packing and hexagonal close packing...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27892631/flash-induced-self-limited-plasmonic-welding-of-silver-nanowire-network-for-transparent-flexible-energy-harvester
#18
Jung Hwan Park, Geon-Tae Hwang, Shinho Kim, Jeongmin Seo, Hong-Jin Park, Kyoungsik Yu, Taek-Soo Kim, Keon Jae Lee
The outstanding performance (sheet resistance of 5 Ω sq(-1) at transmittance of 90%) and strongly adhesive (30.7 J m(-2) ) silver nanowires (AgNWs) are fabricated using flash-induced plasmonic welding (FPW) based on theoretical research of photothermal interactions. The FPW-processed AgNWs are utilized as electrodes of a transparent flexible energy harvester, and this device exhibits excellent transmittance and high electric output performance. The FPW methodology provides a high-tech solution for transparent flexible electronics...
November 28, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27891143/comparative-physiological-and-proteomic-analysis-reveal-distinct-regulation-of-peach-skin-quality-traits-by-altitude
#19
Evangelos Karagiannis, Georgia Tanou, Martina Samiotaki, Michail Michailidis, Grigorios Diamantidis, Ioannis S Minas, Athanassios Molassiotis
The role of environment in fruit physiology has been established; however, knowledge regarding the effect of altitude in fruit quality traits is still lacking. Here, skin tissue quality characters were analyzed in peach fruit (cv. June Gold), harvested in 16 orchards located in low (71.5 m mean), or high (495 m mean) altitutes sites. Data indicated that soluble solids concentration and fruit firmness at commercial harvest stage were unaffected by alitute. Peach grown at high-altitude environment displayed higher levels of pigmentation and specific antioxidant-related activity in their skin at the commercial harvest stage...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27886633/a-novel-method-to-harvest-chlorella-sp-via-low-cost-bioflocculant-influence-of-temperature-with-kinetic-and-thermodynamic-functions
#20
Richa Kothari, Vinayak V Pathak, Arya Pandey, Shamshad Ahmad, Chandni Srivastava, V V Tyagi
In this study, harvesting efficiency (HE) of bioflocculant (egg shell) was observed with variation in flocculent concentrations (0-100mgL(-1)), temperature (30°C, 35°C 40°C, 45°C and 50°C) and variable contact time (0-50min). It was found maximum (≈95.6%) with 100mgL(-1) bioflocculant concentration whereas influence of temperature was also observed with optimized concentration of bioflocculant (100mgL(-1)) at 40°C (≈98.1%) and 50°C (≈99.3%), in 30min of contact time. Significant changes in algal cell structures were also analyzed after exposure to various temperatures with microscopy, SEM (Scanning electron microscopy) and EDS (Energy dispersive X-ray spectroscopy) images with and without bioflocculant...
November 15, 2016: Bioresource Technology
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