Selectively tuning ionic thermopower in all-solid-state flexible polymer composites for thermal sensing

AbstractThere has been increasing interest in the emerging ionic thermoelectric materials with huge ionic thermopower. However, it’s challenging to selectively tune the thermopower of all-solid-state polymer materials because the transportation of ions in all-solid-state polymers is much more complex than those of liquid-dominated gels. Herein, this work provides all-solid-state polymer materials with a wide tunable thermopower range (+20~−6 mV K−1), which is different from previously reported gels. Moreover, the mechanism of p-n conversion in all-solid-state ionic thermoelectric polymer material at the atomic scale was presented based on the analysis of Eastman entropy changes by molecular dynamics simulation, which provides a general strategy for tuning ionic thermopower and is beneficial to understand the fundamental mechanism of the p-n conversion. Furthermore, a self-powered ionic thermoelectric thermal sensor fabricated by the developed p- and n-type polymers demonstrated high sensitivity and durability, extending the application of ionic thermoelectric materials.

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Hybrid Thermoelectrics

Annual Review of Materials Research ◽

10.1146/annurev-matsci-082319-111001 ◽

2020 ◽

Vol 50 (1) ◽

pp. 319-344

Author(s):

Jia Liang ◽

Shujia Yin ◽

Chunlei Wan

Keyword(s):

Solid State ◽

Hybrid Materials ◽

Thermoelectric Materials ◽

Hybrid Composites ◽

Inorganic Materials ◽

Atomic Scale ◽

Thermoelectric Performance ◽

New Techniques ◽

Compositional Diversity ◽

Solid State Cooling

Constructing hybrid composites with organic and inorganic materials at different length scales provides unconventional opportunities in the field of thermoelectric materials, which are classified as hybrid crystal, superlattice, and nanocomposite. A variety of new techniques have been proposed to fabricate hybrid thermoelectric materials with homogeneous microstructures and intimate interfaces, which are critical for good thermoelectric performance. The combination of organic and inorganic materials at the nano or atomic scale can cause strong perturbation in the structural, electron, and phonon characteristics, providing new mechanisms to decouple electrical and thermal transport properties that are not attainable in the pure organic or inorganic counterparts. Because of their increasing thermoelectric performance, compositional diversity, mechanical flexibility, and ease of fabrication, hybrid materials have become the most promising candidates for flexible energy harvesting and solid-state cooling.

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Seeing atomic-scale structural origins and foreseeing new pathways to improved thermoelectric materials

Materials Horizons ◽

10.1039/c9mh00543a ◽

2019 ◽

Vol 6 (8) ◽

pp. 1548-1570 ◽

Cited By ~ 9

Author(s):

Haijun Wu ◽

Yang Zhang ◽

Shoucong Ning ◽

Li-Dong Zhao ◽

Stephen J. Pennycook

Keyword(s):

Solid State ◽

Electric Power ◽

Thermal Energy ◽

Thermoelectric Materials ◽

Waste Heat ◽

Electronic Devices ◽

Electrical Energy ◽

Atomic Scale ◽

Direct Inter

Thermoelectricity enables the direct inter-conversion between electrical energy and thermal energy, promising for scavenging electric power from sources of waste heat and protecting solid-state refridgerating electronic devices from overheating.

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Separating photoanode from recognition events: toward a general strategy for a self-powered photoelectrochemical immunoassay with both high sensitivity and anti-interference capabilities

Chemical Communications ◽

10.1039/c8cc02627k ◽

2018 ◽

Vol 54 (51) ◽

pp. 7062-7065 ◽

Cited By ~ 20

Author(s):

Gao-Chao Fan ◽

Linzheng Ma ◽

Silambarasan Jayachandran ◽

Zimeng Li ◽

Xiliang Luo

Keyword(s):

High Sensitivity ◽

General Strategy ◽

Efficient Strategy ◽

Self Powered ◽

Photoelectrochemical Immunoassay

A general, efficient strategy for a self-powered PEC immunoassay, with both high sensitivity and anti-interference properties, by separating the photoanode from recognition events.

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Precision grain Boundary Engineering in commercial Bi2Te2.7Se0.3 thermoelectric materials towards high performance

Journal of Materials Chemistry A ◽

10.1039/d1ta01016f ◽

2021 ◽

Author(s):

Shuankui Li ◽

Zhongyuan Huang ◽

Rui Wang ◽

Chaoqi Wang ◽

Wenguang Zhao ◽

...

Keyword(s):

Grain Boundary ◽

Thermoelectric Materials ◽

High Performance ◽

General Strategy ◽

Grain Boundary Engineering

The strong interrelation between electrical and thermo parameters have been regarded as one of the biggest bottlenecks to obtain high-performance thermoelectric materials. Therefore, to explore a general strategy to fully...

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A High Sensitivity Self-Powered Wind Speed Sensor Based on Triboelectric Nanogenerators (TENGs)

Sensors ◽

10.3390/s21092951 ◽

2021 ◽

Vol 21 (9) ◽

pp. 2951

Author(s):

Yangming Liu ◽

Jialin Liu ◽

Lufeng Che

Keyword(s):

Wind Speed ◽

High Sensitivity ◽

Electrical Signal ◽

Geometrical Parameters ◽

Sensor Systems ◽

Speed Sensor ◽

Speed Range ◽

Self Powered ◽

Triboelectric Nanogenerators ◽

Application Prospects

Triboelectric nanogenerators (TENGs) have excellent properties in harvesting tiny environmental energy and self-powered sensor systems with extensive application prospects. Here, we report a high sensitivity self-powered wind speed sensor based on triboelectric nanogenerators (TENGs). The sensor consists of the upper and lower two identical TENGs. The output electrical signal of each TENG can be used to detect wind speed so that we can make sure that the measurement is correct by two TENGs. We study the influence of different geometrical parameters on its sensitivity and then select a set of parameters with a relatively good output electrical signal. The sensitivity of the wind speed sensor with this set of parameters is 1.79 μA/(m/s) under a wind speed range from 15 m/s to 25 m/s. The sensor can light 50 LEDs at the wind speed of 15 m/s. This work not only advances the development of self-powered wind sensor systems but also promotes the application of wind speed sensing.

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A Self-Powered Nanogenerator for the Electrical Protection of Integrated Circuits from Trace Amounts of Liquid

Nano-Micro Letters ◽

10.1007/s40820-019-0338-1 ◽

2019 ◽

Vol 12 (1) ◽

Cited By ~ 3

Author(s):

Zhuang Hui ◽

Ming Xiao ◽

Daozhi Shen ◽

Jiayun Feng ◽

Peng Peng ◽

...

Keyword(s):

Integrated Circuits ◽

High Performance ◽

Printed Circuit Board ◽

Short Circuit ◽

High Sensitivity ◽

Short Circuit Current ◽

Fast Response ◽

Open Circuit ◽

Circuit Board ◽

Self Powered

Abstract With the increase in the use of electronic devices in many different environments, a need has arisen for an easily implemented method for the rapid, sensitive detection of liquids in the vicinity of electronic components. In this work, a high-performance power generator that combines carbon nanoparticles and TiO2 nanowires has been fabricated by sequential electrophoretic deposition (EPD). The open-circuit voltage and short-circuit current of a single generator are found to exceed 0.7 V and 100 μA when 6 μL of water was applied. The generator is also found to have a stable and reproducible response to other liquids. An output voltage of 0.3 V was obtained after 244, 876, 931, and 184 μs, on exposure of the generator to 6 μL of water, ethanol, acetone, and methanol, respectively. The fast response time and high sensitivity to liquids show that the device has great potential for the detection of small quantities of liquid. In addition, the simple easily implemented sequential EPD method ensures the high mechanical strength of the device. This compact, reliable device provides a new method for the sensitive, rapid detection of extraneous liquids before they can impact the performance of electronic circuits, particularly those on printed circuit board.

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Equilibrium and Kinetic Properties of Minerals

Mineralogical Magazine ◽

10.1180/002646198547909 ◽

1998 ◽

Vol 62 (5) ◽

pp. 581-583

Author(s):

Simon A. T. Redfern

Keyword(s):

Solid State ◽

Statistical Mechanics ◽

Structural Features ◽

Atomic Scale ◽

Kinetic Properties ◽

Computational Power ◽

Equilibrium Thermodynamics ◽

Bulk Properties ◽

Scale Characteristics ◽

Number Of Publications

How can the equilibrium and non-equilibrium thermodynamics of minerals be understood from their atomic-scale structural features? How can they be predicted, simply from models for the forces between atoms? Advances in analytical theory, statistical mechanics, experimental solid-state science, computational power, and the sophistication of a mineralogical approach that brings all of these together, means that these questions, once imponderable, are now realistically tractable. These questions have been exercising the minds of mineralogists over the last decade or so, and have motivated many developments in the science. Acting as way-markers along the path, there are a number of publications which have followed from meetings where these questions have been addressed. It is now twelve years since the publication of Microscopic to Macroscopic, an edition of Reviews in Mineralogy (Kieffer and Navrotsky, 1985) that sought to identify the fundamental controls on the bulk properties of minerals in terms of their atomic-scale characteristics.

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Solid-state amorphization of Ni/Zr bilayer through diffusion-limited-reaction observed by molecular-dynamics simulation

Computational Materials Science ◽

10.1016/s0927-0256(98)00102-5 ◽

1999 ◽

Vol 14 (1-4) ◽

pp. 163-168 ◽

Cited By ~ 3

Author(s):

W.S Lai ◽

B.X. Liu

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulation ◽

Solid State ◽

Dynamics Simulation ◽

Diffusion Limited ◽

Through Diffusion ◽

Diffusion Limited Reaction ◽

State Amorphization

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Packaged Droplet Microresonator for Thermal Sensing with High Sensitivity

Sensors ◽

10.3390/s18113881 ◽

2018 ◽

Vol 18 (11) ◽

pp. 3881 ◽

Cited By ~ 9

Author(s):

Xiaogang Chen ◽

Liang Fu ◽

Qijing Lu ◽

Xiang Wu ◽

Shusen Xie

Keyword(s):

Liquid Droplet ◽

Thermal Sensitivity ◽

High Sensitivity ◽

Liquid Limit ◽

Practical Applications ◽

Sensing Applications ◽

Cavity Structure ◽

Thermal Sensing ◽

Facile Fabrication ◽

Definition Of

Liquid droplet and quasi-droplet whispering gallery mode (WGM) microcavities have been widely studied recently for the enhanced spatial overlap between the liquid and WGM field, especially in sensing applications. However, the fragile cavity structure and the evaporation of liquid limit its practical applications. Here, stable, packaged, quasi-droplet and droplet microcavities are proposed and fabricated for thermal sensing with high sensitivity. The sensitivity and electromagnetic field intensity distribution are analyzed by Mie theory, and a quantified definition of the quasi-droplet is presented for the first time to the best of our knowledge. By doping dye material directly into the liquid, lasing packaged droplet and quasi-droplet microcavity sensors with a high thermal sensitivity of up to 205.3 pm/°C are experimentally demonstrated. The high sensitivity, facile fabrication, and mechanically robust properties of the optofluidic, packaged droplet microresonator make it a promising candidate for future integrated photonic devices.

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