This article aims to propose a cantilever based cooling device employing non-axis symmetric placement of bulk ferroelectric patches. Ambient mechanical vibrations produce large stresses in cantilevers resulting in elastocaloric effect associated with ferroelectrics. Further, design allows cascading of several cantilevers to achieve large cooling response. A finite element analysis of the system was performed using material properties of bulk 0.50Ba(ZrTi)O-0.50(BaCa)TiO. An individual element could produce a peak elastocaloric effect of 0.02 K (324 K); whereas the proposed system could achieve a temperature drop of 0.2 K within 50 seconds (10 elements, 1.5 Hz). Furthermore, net cooling can be further improved about ~2 K (using 10 cantilevers) for a starting temperature of 358 K. This study shows that elastocaloric effect in ferroelectric materials is capable of converting waste mechanical vibration into refrigeration effect which is not reported so far.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6408585 | PMC |
| http://dx.doi.org/10.1038/s41598-019-40159-8 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Precise Tailoring of Unprecedent Layered Perovskite-type Heterostructure Ferroelectric via Chemical Molecular Scissor.
Angew Chem Int Ed Engl
January 2025
Chinese Academy of Sciences Fujian Institute of Research on the Structure of Matter, State Key Laboratory of Structural Chemistry, Yangqiao West Road 155, GuLou District, 350002, Fuzhou, CHINA.
Precise stacking of distinct two-dimensional (2D) rigid slabs to build heterostructures has renewed the portfolio of 2D materials, e.g., magic-angle graphene, due to the emergence of exotic physical properties.
View Article and Find Full Text PDFFerroelectricity and Nonlinear Optical Responses in Two-Dimensional Distorted ( = Cu, Ag, Au; = Chalcogens; = Halogen) Monolayers.
ACS Appl Mater Interfaces
January 2025
Department of Physics, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China.
Two-dimensional (2D) materials with spontaneous polarization can exhibit large second-order nonlinear optical (NLO) effects. Here, we present a series of stable distorted monolayers by using first-principles calculations and lattice vibration analysis. The structural distortion leads to a lower polar symmetry, giving rise to intrinsic ferroelectricity with a Curie point up to room temperature.
View Article and Find Full Text PDFA ferroelectrically modulated ultrasensitive two-dimensional perovskite phototransistor with zero-gate-bias.
Nanoscale
January 2025
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, 710049, China.
Two-dimensional (2D) organic-inorganic halide perovskites are promising sensitive materials for optoelectronic applications due to their strong light-matter interactions, layered structure, long carrier lifetime and diffusion length. However, a high gate bias is indispensable for perovskite-based phototransistors to optimize detection performances, since ion migration seriously screens the gate electric field and the deposition process introduces intrinsic defects, which induces severe leakages and large power dissipation. In this work, an ultrasensitive phototransistor based on the (PEA)SnI perovskite and the Al:HfO ferroelectric layer is meticulously studied, working without an external gate voltage.
View Article and Find Full Text PDFMolecular ferroelectric self-assembled interlayer for efficient perovskite solar cells.
Nat Commun
January 2025
State Key Laboratory of Silicon and Advanced Semiconductor Materials, Department of Polymer Science and Engineering, International Research Center for X Polymers, Zhejiang University, Hangzhou, PR China.
The interfacial molecular dipole enhances the photovoltaic performance of perovskite solar cells (PSCs) by facilitating improved charge extraction. However, conventional self-assembled monolayers (SAMs) face challenges like inadequate interface coverage and weak dipole interactions. Herein, we develop a strategy using a self-assembled ferroelectric layer to modify the interfacial properties of PSCs.
View Article and Find Full Text PDFStrong Interfacial Interaction in Polarized Ferroelectric Heterostructured Nanosheets for Highly Efficient and Selective Photocatalytic CO Reduction.
Small
January 2025
State Key Laboratory of Electromechanical Integrated Manufacturing of High-Performance Electronic Equipments, School of Mechano-Electronic Engineering, Xidian University, Xi'an, 710071, China.
Heterojunctions are sustainable solutions for the photocatalytic CO reduction reaction (CORR) by regulating charge separation behavior at the interface. However, their efficiency and product selectivity are severely hindered by the inflexible and weak built-in electric field and the electronic structure of the two phases. Herein, ferroelectric-based heterojunctions between polarized bismuth ferrite (BFO(P)) and CdS are constructed to enhance the interfacial interactions and catalytic activity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!