Enhanced output of ZnO nanosheet-based piezoelectric nanogenerator with a novel device structure

2021 ◽  
Author(s):  
Siju Mishra ◽  
P. Supraja ◽  
Vishnu V. Jaiswal ◽  
P. Ravi Sankar ◽  
R. Rakesh Kumar ◽  
...  
Keyword(s):  
Output Voltage ◽  
Photoluminescence Property ◽  
Cost Effective ◽  
Design Strategy ◽  
Aluminum Substrate ◽  
Device Structure ◽  
Novel Device ◽  
Voltage Output ◽  
Zno Nanosheets ◽  
Side Coating

Abstract We report the double-fold enhancement of piezoelectric nanogenerator output voltage with a simple design strategy. The piezoelectric nanogenerator is fabricated with ZnO nanosheets coated on both sides of the aluminum substrate in this new design strategy with necessary electrodes. The cost-effective hydrothermal method is employed to synthesize two-dimensional (2D) ZnO nanosheets on both sides of the aluminum substrate at a low growth temperature of 80˚C for 4 hours. The ZnO nanosheets were characterized for their morphology, crystallinity, and photoluminescence property. The nanogenerator is fabricated with a double-side coated aluminum substrate and compared its performance with a single-side coated aluminum substrate. The nanogenerators fabricated only with one side coating produced an output voltage of ~ 170 mV. In contrast, the nanogenerators fabricated with a double side coating produced an output voltage of ~ 285 mV. The nanogenerator with double-side coating produced ~1.7 times larger voltage output compared to the voltage output from one side coated nanogenerators fabricated with each side of the substrate. The enhancement in the output

scholarly journals Applying Biomimetic Principles to Thermoelectric Cooling Devices for Water Collection

2017 ◽  
Vol 7 (3) ◽  
pp. 27
Author(s):  
Kyle B Davidson ◽  
Bahram Asiabanpour ◽  
Zaid Almusaied
Keyword(s):  
Large Scale ◽  
Cost Effective ◽  
Thermoelectric Cooling ◽  
Device Structure ◽  
Cooling Systems ◽  
Cooling Devices ◽  
Water Collection ◽  
Maximum Water ◽  
The Ideal

The shortage of freshwater resources in the world has developed the need for sustainable, cost-effective technologies that can produce freshwater on a large scale. Current solutions often have extensive manufacturing requirements, or involve the use of large quantities of energy or toxic chemicals. Atmospheric water generating solutions that minimize the depletion of natural resources can be achieved by incorporating biomimetics, a classification of design inspired by nature. This research seeks to optimize thermoelectric cooling systems for use in water harvesting applications by analyzing the different factors that affect surface temperature and water condensation in TEC devices. Further experiments will be directed towards developing a robust, repeatable system, as well as an accurate measurement system. Surface modifications, device structure and orientation, and power generation will also be studied to better understand the ideal conditions for maximum water collection in thermoelectric cooling systems.

A novel device in evaluating syncope

2000 ◽  
Vol 9 (4) ◽  
pp. 288-293 ◽  
Author(s):  
LG Futterman ◽  
L Lemberg
Keyword(s):  
Physical Examination ◽  
Patient Activation ◽  
Cost Effective ◽  
The Elderly ◽  
Loop Recorder ◽  
Novel Device ◽  
Cardiac Syncope ◽  
Common Causes ◽  
Insertable Loop Recorder ◽  
Automatic Capture

Syncope may be a manifestation of many diseases. The etiology is often difficult to determine. Much effort, time, and expense have been required to determine a diagnosis. A thorough history and physical examination are essential (Table 3). Several clinical pearls may be of help in the diagnosis of syncope: (a) the most important elements in the evaluation of syncope are a detailed history and physical examination; (b) syncope is a common problem in young healthy adults and the elderly; (c) a heavy meal is a specific cause of syncopy in the elderly (postprandial), however this etiology often goes unrecognized; (d) syncope is caused by 1 of 3 mechanisms: decreased cardiac output, systemic vascular resistance, or cerebrovascular disease; (e) reflex-mediated syndromes (vasovagal) are common causes of syncope in young adults, and orthostatic hypotension is an important cause of syncope in the elderly; and (f) the 1-year mortality of cardiac syncope (18%-33%) is significantly higher than that from non-cardiac syncope (0%-12%). A proven and useful tool has recently been advanced to aid in the evaluation of syncope. The Reveal Plus insertable loop recorder has auto activation that allows automatic capture and recording of arrhythmic events. Patient activation is an option. The recorder lasts 12 to 14 months and has proven to be a valuable and reliable cost-effective asset in our quest to evaluate syncope.

Novel device structure for phase change memory toward low-current operation

2015 ◽  
Vol 54 (9) ◽  
pp. 094302 ◽  
Author(s):  
Eunha Kim ◽  
Nam Soo Kang ◽  
Hyung-Jun Yang ◽  
Yuji Sutou ◽  
Yun-Heub Song
Keyword(s):  
Phase Change ◽  
Phase Change Memory ◽  
Device Structure ◽  
Novel Device ◽  
Current Operation ◽  
Change Memory

Warming and cooling device using thermoelectric Peltier elements tested on male mice

2019 ◽  
Vol 54 (5) ◽  
pp. 443-451
Author(s):  
Nodir Madrahimov ◽  
Ruslan Natanov ◽  
Abdurasul Khalikov ◽  
Erin C Boyle ◽  
Danny Jonigk ◽  
...  
Keyword(s):  
Normal Sinus Rhythm ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Precise Control ◽  
Novel Device ◽  
Normal Sinus ◽  
Cardiac Procedures ◽  
Clinical Methods ◽  
Strong Linear Correlation ◽  
Clinical Conditions

Hypothermia is a treatment strategy for different clinical conditions and an essential part of cardiopulmonary bypass in complex cardiac procedures. Clinically, cooling patients is achieved via a mattress and heat exchanger integrated into a membrane oxygenator connected to a waterbed using a refrigerator system based on volatile and toxic liquids. Peltier elements are known as environmentally friendly thermoelectric generators that enable rapid warming and cooling. In this paper, we describe the construction of a novel device for rapid and precise control of mouse warming and cooling using thermoelectric Peltier elements. Six male BALB/c mice were subjected to deep hypothermia and were rewarmed under full physiological monitoring. After rewarming, all animals were observed for two hours, and pathology was evaluated in several organs. All animals tolerated the rapid cooling process well and remained active after rewarming. Temperature-relevant changes were seen via electrocardiography, with heart-rate patterns showing a strong linear correlation to body temperature. No myocardial ischaemia was seen. However, two animals experienced bradycardic atrial fibrillation which spontaneously converted to normal sinus rhythm during rewarming. No histological damage was seen in the heart, liver, kidney or lungs. Our device can effectively be used for heat shock and hypothermia studies in mice, and we foresee no obstacles for its application to other small rodents such as hamsters and young rats. In comparison to known experimental and clinical methods of hypothermia, our device is environmentally friendly, cost-effective and easy to handle, allowing precise control and maintenance of body temperatures ranging from 18℃ to 42℃.

Comparative Efficiency of Solar Panel by Utilize DC Water Pump and DC Hybrid Cooling System

2015 ◽  
Vol 793 ◽  
pp. 398-402
Author(s):  
Y.M. Irwan ◽  
W.Z. Leow ◽  
M. Irwanto ◽  
M. Fareq ◽  
N. Gomesh ◽  
...  
Keyword(s):  
Output Power ◽  
Solar Irradiance ◽  
Output Voltage ◽  
Cooling System ◽  
Water Pump ◽  
Output Current ◽  
Comparative Efficiency ◽  
Pv Module ◽  
Voltage Output ◽  
Hybrid Cooling

The purpose of this paper is discussed about comparative efficiency of solar panel by utilize DC water pump and DC hybrid cooling system. Ambient temperature and solar irradiance are played main role of the efficiency of PV module. When temperature of PV module increase, the efficiency of PV module will decreased and vice versa. When solar irradiance increase, output current and output power will increase with linear and output voltage will increase with marginal and vice versa. A solution is provided to solve problem of low efficiency of PV module which is DC cooling system. DC brushless fan and water pump with inlet/outlet manifold were designed for actively cool the PV module to improve efficiency of PV cells. The PV module with DC water pump cooling system increase 3.52 %, 36.27 %, 38.98 % in term of output voltage, output current, and output power respectively. It decrease 6.36 °C compare than to PV module without DC water pump cooling system. While PV module with DC hybrid cooling system increase 4.99 %, 39.90 %, 42.65 % in term of output voltage, output current, and output power respectively. It decrease 6.79 °C compare to PV module without DC water pump cooling system. The higher efficiency of PV module, the payback period of the system can be shorted and the lifespan of PV module can be longer.

Suppression of Staebler-Wronski Effect Induced Electrical Crosstalk in a-Si:H-Based Image Sensors

2004 ◽  
Vol 808 ◽  
Author(s):  
Jeremy A. Theil
Keyword(s):  
Electric Fields ◽  
Image Sensors ◽  
Minimum Size ◽  
Measured Signal ◽  
Device Structure ◽  
Leakage Currents ◽  
Novel Device ◽  
Cmos Image Sensors ◽  
Staebler Wronski Effect ◽  
Array Performance

ABSTRACTHydrogenated amorphous silicon photodiodes have been considered for use in array-based image sensors. They promise to significantly reduce the size and cost of CMOS image sensors, while offering the promise of improved pixel sensitivity. However, Staebler-Wronski Effect (SWE) based electrical crosstalk degradation has been a major concern in their acceptance, due to degraded spatial contrast and color fidelity. Since the SWE is a fundamental mechanism of a Si:H, solutions to this issue must look to ways of mitigating the SWE on diode array performance rather than elimination of SWE. In order to study electrical crosstalk, a novel device structure that inhibits light from reaching portions of the a-Si:H/dielectric interface was designed and fabricated to directly measure interpixel leakage currents. Results from these structures indicate that edge leakage can be a significant contributing component to the measured signal. In addition, a CMOS-compatible structure to suppress electrical crosstalk was designed and fabricated. Results from these structures demonstrate suppression of crosstalk up to lateral electric fields of at least 2 x 104 V/cm. Such suppression is adequate for densely packed minimum-size pixel arrays. Aspects of the design and implementation of the structure will also be discussed.

Novel device structure for Cu(In,Ga)Se2 thin film solar cells using transparent conducting oxide back and front contacts

Solar Energy ◽  
2004 ◽  
Vol 77 (6) ◽  
pp. 739-747 ◽  
Author(s):  
Tokio Nakada ◽  
Yutaka Hirabayashi ◽  
Takehito Tokado ◽  
Daiske Ohmori ◽  
Takahiro Mise
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Transparent Conducting Oxide ◽  
Thin Film Solar Cells ◽  
Device Structure ◽  
Novel Device ◽  
Transparent Conducting

14.2: Novel Device Structure of MIM Cathode Array for Field Emission Displays

2001 ◽  
Vol 32 (1) ◽  
pp. 193 ◽  
Author(s):  
M. Sagawa ◽  
T. Kusunoki ◽  
M. Suzuki ◽  
K. Tsuji
Keyword(s):  
Field Emission ◽  
Device Structure ◽  
Novel Device ◽  
Field Emission Displays

scholarly journals To Divide or Not to Divide? A Case Report Using Near-Infrared Spectroscopy to Assist With Decision Making on Timing of Division of Forehead Flaps

2021 ◽  
Vol 7 ◽  
pp. 2513826X2110511
Author(s):  
Spencer Yakaback ◽  
Carmen Webb ◽  
Claire Temple-Oberle
Keyword(s):  
Infrared Spectroscopy ◽  
Oxygen Saturation ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Free Flaps ◽  
Cost Effective ◽  
Tissue Perfusion ◽  
Tissue Oxygen Saturation ◽  
Tissue Oxygen ◽  
Novel Device

Paramedian forehead flaps (PMFFs) are commonly performed procedures for the reconstruction of complex nasal defects and require multiple stages predicated on when the interpolated pedicle is no longer required to provide perfusion to the neo-nose. As the presence of the pedicle is disfiguring, the flap is therefore divided ideally as soon as safely possible, but that determination is challenging. Recently, a novel device that uses near-infrared spectroscopy (NIRS) to measure tissue oxygen saturation has been developed and may provide an accurate and cost-effective tool to assess tissue perfusion. Here we present the use of this technology in the management of 2 patients who underwent successful oncologic nasal reconstructions using PMFFs. Using the device as a clinical adjunct, we measured tissue oxygen saturation values in the flaps before and after pedicle division, which assisted us in deciding when to safely divide the flaps, as well as with post-division management, particularly when a low tissue oxygen saturation reading ultimately necessitated the use of nitroglycerine past to improve flap perfusion in one of our patients. Interestingly, the values we recorded corresponded well to previously published cut-off values for adequate tissue perfusion, which have to date only been reported for free flaps. To our knowledge, this is the first description of the use of NIRS in the division of PMFFs, which we overall found to be a useful and reliable adjunct to a clinical examination in assessing flap neovascularization.

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