Comment on “Ferroelectric composite-based piezoelectric energy harvester for self-powered detection of obstructive sleep”

作     者：Alexander Tkach Olena Okhay 

作者机构：CICECO-Aveiro Institute of MaterialsDepartment of Materials and Ceramic EngineeringUniversity of Aveiro3810-193AveiroPortugal TEMA-Centre for Mechanical Technology and AutomationDepartment of Mechanical EngineeringUniversity of Aveiro3810-193AveiroPortugal LASI-Intelligent Systems Associate Laboratory4800-058GuimaraesPortugal 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2024年第10卷第5期

页      面：1144-1146页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：This work was developed within the scope of the project CICECO-Aveiro Institute of Materials,UIDB/50011/2020(DOI 10.54499/UIDB/50011/2020) UIDP/50011/2020(DOI 10.54499/UIDP/50011/2020)&LA/P/0006/2020(DOI 10.54499/LA/P/0006/2020) financed by national funds through the FCT/MEC(PIDDAC)as well as within FCT independent researcher grant 2021.02284.CEECIND/CP1659/CT0018(DOI 10.54499/2021.02284.CEECIND/CP1659/CT0018) supported by national funds,through FCT in the scope of the framework contract foreseen in numbers 4,5,and 6 of article 23 of the Decree Law 57/2016,of 29 August,UIDB/00481/2020 and UIDP/00481/2020,DOI 10.54499/UIDB/00481/2020 and DOI 10.54499/UIDP/00481/2020 CENTRO-01-0145-FEDER-022083-Centro Portugal Regional Operational Programme(Centro2020),under the PORTUGAL 2020 Partnership Agreement,through the European Regional Development Fund 

主　　题：SrTiO_(3) Dielectric permittivity Ferroelectrics Piezoelectrics Energy harvesting 

摘      要：SrTi_(2)O_(5) particles were claimed by Panda et *** *** 2023;9:609 as a new lead-free ferroelectric material with orthorhombic symmetry and space group of Cmm2,being,therefore,employed as a base of piezoelectric energy ***,in this comment we express concerns regarding the presence of the piezoelectricity in the studied material and the interpretation of the structural,microstructural,and ferroelectric results in that publication as those associated with SrTi_(2)O_(5).We also note that the presented dielectric results are contradictory and that many important details are missing.