{"title":"解码复杂氧化物的表面","authors":"Franz J. Giessibl, Alfred John Weymouth","doi":"10.1126/science.ads0942","DOIUrl":null,"url":null,"abstract":"<div >Nature usually finds a way to lower the free energy at the surface of a crystal. It is often too costly, thermodynamically, for surface atoms to maintain the bulk termination—the structure of the atoms and bonds deep below the surface. Thus, the surface of a crystal undergoes reconstruction through rearrangement and distortion, which affect materials’ properties. Elucidating complex surface reconstruction of crystals is challenging for insulating materials such as aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) because conventional surface imaging tools that provide atomic resolution require a conducting or semiconducting surface. On page 1241 of this issue, Hütner <i>et al.</i> (<i>1</i>) report a milestone in surface science by revealing the precise atomic ordering of a reconstructed α-Al<sub>2</sub>O<sub>3</sub> surface by use of atomic force microscopy (AFM). This contributes to building a complete model of the atomic layers connecting the surface to the bulk, which is not accessible by imaging tools.</div>","PeriodicalId":21678,"journal":{"name":"Science","volume":null,"pages":null},"PeriodicalIF":44.7000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Decoding the surface of a complex oxide\",\"authors\":\"Franz J. Giessibl, Alfred John Weymouth\",\"doi\":\"10.1126/science.ads0942\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div >Nature usually finds a way to lower the free energy at the surface of a crystal. It is often too costly, thermodynamically, for surface atoms to maintain the bulk termination—the structure of the atoms and bonds deep below the surface. Thus, the surface of a crystal undergoes reconstruction through rearrangement and distortion, which affect materials’ properties. Elucidating complex surface reconstruction of crystals is challenging for insulating materials such as aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) because conventional surface imaging tools that provide atomic resolution require a conducting or semiconducting surface. On page 1241 of this issue, Hütner <i>et al.</i> (<i>1</i>) report a milestone in surface science by revealing the precise atomic ordering of a reconstructed α-Al<sub>2</sub>O<sub>3</sub> surface by use of atomic force microscopy (AFM). This contributes to building a complete model of the atomic layers connecting the surface to the bulk, which is not accessible by imaging tools.</div>\",\"PeriodicalId\":21678,\"journal\":{\"name\":\"Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":44.7000,\"publicationDate\":\"2024-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://www.science.org/doi/10.1126/science.ads0942\",\"RegionNum\":1,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science","FirstCategoryId":"103","ListUrlMain":"https://www.science.org/doi/10.1126/science.ads0942","RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
Nature usually finds a way to lower the free energy at the surface of a crystal. It is often too costly, thermodynamically, for surface atoms to maintain the bulk termination—the structure of the atoms and bonds deep below the surface. Thus, the surface of a crystal undergoes reconstruction through rearrangement and distortion, which affect materials’ properties. Elucidating complex surface reconstruction of crystals is challenging for insulating materials such as aluminum oxide (Al2O3) because conventional surface imaging tools that provide atomic resolution require a conducting or semiconducting surface. On page 1241 of this issue, Hütner et al. (1) report a milestone in surface science by revealing the precise atomic ordering of a reconstructed α-Al2O3 surface by use of atomic force microscopy (AFM). This contributes to building a complete model of the atomic layers connecting the surface to the bulk, which is not accessible by imaging tools.
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