{"id":1695,"date":"2019-05-22T02:47:38","date_gmt":"2019-05-22T02:47:38","guid":{"rendered":"http:\/\/www.meetyoucarbide.com\/single-post-try-these-high-end-atmospheric-grade-structural-characterization-techniques\/"},"modified":"2020-05-04T13:12:07","modified_gmt":"2020-05-04T13:12:07","slug":"try-these-high-end-atmospheric-grade-structural-characterization-techniques","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/tr\/bu-ust-duzey-atmosferik-dereceli-yapisal-karakterizasyon-tekniklerini-deneyin\/","title":{"rendered":"Bu \u00fcst d\u00fczey atmosferik s\u0131n\u0131f yap\u0131sal karakterizasyon tekniklerini deneyin"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper limit-wrapper\">\n<div>\n<div>Son ara\u015ft\u0131rmalarda, kusur m\u00fchendisli\u011fini birle\u015ftirerek malzeme \u00f6zelliklerinin tasar\u0131m\u0131 ve d\u00fczenlenmesi \u015fu anda bir ara\u015ft\u0131rma s\u0131cak noktas\u0131d\u0131r. Ge\u00e7i\u015f metal oksitleri, s\u00fclf\u00fcrler ve di\u011fer malzemelerde, kusurlar\u0131n varl\u0131\u011f\u0131 elektronik yap\u0131lar\u0131n\u0131 ve kimyasal \u00f6zelliklerini \u00f6nemli \u00f6l\u00e7\u00fcde de\u011fi\u015ftirecek ve b\u00f6ylece enerji depolama ve d\u00f6n\u00fc\u015ft\u00fcrme alan\u0131nda geni\u015f uygulamalar\u0131n\u0131 ger\u00e7ekle\u015ftirecektir. \u00d6rne\u011fin, pil malzemelerinin yap\u0131sal tasar\u0131m\u0131nda, kusurlar\u0131n nicel olarak tan\u0131t\u0131lmas\u0131, malzemenin elektriksel iletkenli\u011fini iyile\u015ftirebilir, daha aktif alanlar sa\u011flayabilir ve \u00fcst\u00fcn elektrokimyasal performans elde etmek i\u00e7in litiasyon s\u0131ras\u0131nda malzemenin faz ge\u00e7i\u015fini iyile\u015ftirebilir. Bu ama\u00e7la, ara\u015ft\u0131rmac\u0131lar, malzemelerin kusurlar\u0131n\u0131 g\u00f6zlemleyerek ve karakterize ederek, malzemelerin yap\u0131s\u0131 ve \u00f6zellikleri aras\u0131ndaki ili\u015fkiyi atomik d\u00fczeyde inceleyerek, enerji depolama malzemeleri ara\u015ft\u0131rma alan\u0131na yeni bir kap\u0131 a\u00e7abilirler. Malzemelerin kusurlar\u0131n\u0131 karakterize etmek i\u00e7in HRTEM, XPS, EELS ve di\u011fer teknolojilerin kullan\u0131lmas\u0131 art\u0131k nadir olmasa da, bu teknikler yaln\u0131zca malzeme y\u00fczeyinin incelenmesi i\u00e7in gerilmi\u015f olan yerel alanlar\u0131n incelenmesiyle s\u0131n\u0131rl\u0131 olabilir. malzemenin genel kusurlar\u0131. Ek olarak, bu teknikler yaln\u0131zca malzemelerin y\u00fczey kusurlar\u0131n\u0131n yar\u0131 nicel analizine yard\u0131mc\u0131 olabilirken, daha kal\u0131n numuneler i\u00e7in &quot;s\u0131rt\u0131n zirvesine yatayd\u0131r, derinlik farkl\u0131d\u0131r&quot;. \u00d6zellikle farkl\u0131 i\u00e7 kusurlara ve y\u00fczeylere sahip numuneler i\u00e7in daha da g\u00fc\u00e7s\u00fczd\u00fcr. Burada yazar, 2018 y\u0131l\u0131nda malzeme kusur m\u00fchendisli\u011fi ara\u015ft\u0131rma alan\u0131nda malzemenin makroskopik b\u00fct\u00fcn noktas\u0131ndan kusur yap\u0131s\u0131n\u0131 ve i\u00e7eri\u011fini karakterize etmek i\u00e7in baz\u0131 \u00fcst d\u00fczey kusur karakterizasyon y\u00f6ntemlerini derlemi\u015f ve a\u015fa\u011f\u0131dakileri analiz etmi\u015ftir. Eksiklik varsa, eklemeye ho\u015f geldiniz.<\/div>\n<div>[pozitron yok olma tayf\u0131]<\/div>\n<div>Pozitron yok etme \u00f6m\u00fcr spektrumu (PILS) olarak da bilinen pozitron yok etme spektrumu, malzemelerin \u00f6zelliklerini atomik d\u00fczeyde inceleyen malzemeler i\u00e7in yeni bir tahribats\u0131z test tekni\u011fidir. Bu teknik, kat\u0131 malzemelerdeki kusurlar\u0131n ve bo\u015fluklar\u0131n varl\u0131\u011f\u0131n\u0131 tespit etmek i\u00e7in yayg\u0131n olarak kullan\u0131l\u0131r. Bu alg\u0131lama tekni\u011finin prensibi, pozitronlar elektronlarla etkile\u015fime girdi\u011finde yok olma \u00f6zelli\u011fini kullanarak yok olma s\u0131ras\u0131nda serbest b\u0131rak\u0131lan gama \u0131\u015f\u0131nlar\u0131n\u0131n gev\u015feme s\u00fcresini tespit etmektir. Gev\u015feme s\u00fcresinin uzunlu\u011fu, malzemenin g\u00f6zenek boyutuna, yani bo\u015flu\u011fun boyutuna ba\u011fl\u0131d\u0131r. Su vermenin gev\u015feme s\u00fcresine dayal\u0131 olarak malzemedeki atomik d\u00fczeydeki kusurlar\u0131n dolayl\u0131 olarak de\u011ferlendirilmesi, tekni\u011fin, enerji depolama malzemesinin kusur tasar\u0131m\u0131 ve karakterizasyonunda b\u00fcy\u00fck bir rol oynamas\u0131n\u0131 sa\u011flar.<\/div>\n<div>Nature Communications makalesinde (NAT. COMMUN., 2018, 9, 2120) paladyum katk\u0131l\u0131 molibden dis\u00fclfid malzemeleriyle ilgili yeni bir \u00e7al\u0131\u015fma bildirilmi\u015ftir. Bu teknik, \u015fekilde g\u00f6sterildi\u011fi gibi doping sonras\u0131 olu\u015fan kusurlar\u0131 karakterize etmek i\u00e7in kullan\u0131ld\u0131. Ara\u015ft\u0131rmac\u0131lar, MoS2 malzemesinin 1% paladyum ile katk\u0131lanmas\u0131ndan sonra, kafes kusurunun gev\u015feme s\u00fcresinin \u03c41 ve bo\u015fluk kusurunun gev\u015feme s\u00fcresinin \u03c42 \u00f6nemli \u00f6l\u00e7\u00fcde uzad\u0131\u011f\u0131n\u0131 buldular. Burada \u03c41 183.6s&#039;den 206.2s&#039;ye uzat\u0131l\u0131rken, \u03c42 355.5s&#039;den 384.6s&#039;ye uzat\u0131l\u0131r. Bu gev\u015feme s\u00fcrelerindeki art\u0131\u015f, kusur boyutunda bir art\u0131\u015fa i\u015faret eder. Ek olarak, gev\u015feme s\u00fcresinin yo\u011funlu\u011fu da iyile\u015ftirilir, bu da, doping sonras\u0131 malzemedeki kusurlar\u0131n i\u00e7eri\u011finin, katk\u0131s\u0131z molibden dis\u00fclfid malzemesinden \u00f6nemli \u00f6l\u00e7\u00fcde daha y\u00fcksek oldu\u011fu anlam\u0131na gelir.<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_8587744aa1944efc8e12145262a677bfmv2-1.png\" alt=\"\" title=\"\"><\/p>\n<div>[Geni\u015fletilmi\u015f X-\u0131\u015f\u0131n\u0131 absorpsiyon ince yap\u0131 spektrumu]<\/div>\n<div>Geni\u015fletilmi\u015f X-\u0131\u015f\u0131n\u0131 absorpsiyon ince yap\u0131s\u0131 (XANES), numunenin X-\u0131\u015f\u0131n\u0131 \u0131\u015f\u0131nlamas\u0131 taraf\u0131ndan yay\u0131lan floresan veya fotoelektron taraf\u0131ndan \u00fcretilen geni\u015fletilmi\u015f X-\u0131\u015f\u0131n\u0131 absorpsiyon fenomeni taraf\u0131ndan malzemenin atomu etraf\u0131ndaki kimyasal ortam\u0131n bir analizidir. Geni\u015fletilmi\u015f X-\u0131\u015f\u0131n\u0131 absorpsiyon fenomeni, k\u0131sa menzilli s\u0131ralama fonksiyonu taraf\u0131ndan belirlenir. Yap\u0131sal spektrumdan, so\u011furan atomun kom\u015fu atomlar\u0131n\u0131n t\u00fcr\u00fc, mesafesi ve koordinasyon say\u0131s\u0131 gibi veriler elde edilebilir. Kusurlar\u0131n miktar\u0131, biti\u015fik koordinasyon atomlar\u0131n\u0131n mesafesinin kaymas\u0131 ve tepe noktalar\u0131n\u0131n yo\u011funlu\u011fu g\u00f6zlemlenerek niteliksel olarak belirlenebilir.<\/div>\n<div> Recently, Advanced Energy Material&#8217;s research article reported the use of XANES technology to study the defect of CaMnO3 as an electrode material (Adv. Energy Mater. 2018, 1800612). The researchers used XAS and XANES spectra to analyze oxygen defects in the material. It can be seen from the XANES spectrum that the peak intensity of CMO\/S-300 is significantly lower than that of CMO, which proves the decrease of the valence state of the material after sulfur reduction. In the map after Fourier transform, it is seen that the peak intensity of the CMO\/S-300 spectrum is lower than that of the CMO, and the spacing corresponding to some peaks is shifted from that of the CMO. These data illustrate the structural changes in the surface of the CMO\/S-300 after sulfur reduction and the formation of oxygen defects.<\/div>\n<p><img decoding=\"async\" src=\"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/05\/f875f9_85144a7de0964e36a950b4dffad1a38fmv2-1.png\" alt=\"\" title=\"\"><\/p>\n<div>[Elektronik D\u00f6nd\u00fcrme Tepki Spektrumu]<\/div>\n<div>Paramanyetik rezonans yan\u0131t\u0131 (EPR) olarak da bilinen elektron spin rezonans\u0131, bir radyo frekans\u0131 elektromanyetik alan\u0131n\u0131n etkisi alt\u0131nda bir numunede sabit bir manyetik alanda meydana gelen manyetik enerji seviyeleri aras\u0131nda bir rezonans ge\u00e7i\u015fidir. D\u0131\u015f manyetik alan B&#039;ye dik bir y\u00f6nde \u03bd frekansl\u0131 bir elektromanyetik dalga uyguland\u0131\u011f\u0131nda, malzemenin serbest elektronu taraf\u0131ndan elde edilen enerji h\u03bd olur. \u03bd ve B aras\u0131ndaki ili\u015fki h\u03bd = g\u03bcB&#039;yi sa\u011flad\u0131\u011f\u0131nda, EPR&#039;de g\u00f6r\u00fcnen bir absorpsiyon zirvesine kar\u015f\u0131l\u0131k gelen bir manyetik seviye ge\u00e7i\u015fi meydana gelir. g de\u011feri, e\u015fle\u015fmemi\u015f elektronlar\u0131n bulundu\u011fu kimyasal ortam taraf\u0131ndan belirlenir. Farkl\u0131 bile\u015fiklerin farkl\u0131 g de\u011ferleri vard\u0131r.<\/div>\n<div>Advanced Functional Material taraf\u0131ndan yak\u0131n zamanda yap\u0131lan bir \u00e7al\u0131\u015fma, lityum-k\u00fck\u00fcrt piller i\u00e7in bir elektrot malzemesi olarak k\u00fck\u00fcrt kusurlar\u0131 i\u00e7eren 1T-2H faz\u0131 MoS2-Mxene kompozitini incelemek i\u00e7in EPR teknolojisinin kullan\u0131ld\u0131\u011f\u0131n\u0131 bildirdi (Adv. Funct. Mater. 2018, 1707578). Ara\u015ft\u0131rmac\u0131lar, 1T-2H faz\u0131 MoS2 ve MXene ile bir kompozit sentezledi. Amonyak gaz\u0131 indirgenerek farkl\u0131 derecelerde k\u00fck\u00fcrt kusurlu malzemeler elde edilmi\u015f ve yap\u0131lar\u0131 karakterize edilmi\u015ftir. EPR test analizi kullan\u0131larak, farkl\u0131 amonyak i\u015fleme s\u00fcresine sahip malzemelerin, ag de\u011feri 2.0 olan bir absorpsiyon zirvesine kar\u015f\u0131l\u0131k gelen belirli miktarda k\u00fck\u00fcrt kusurlar\u0131 i\u00e7erdi\u011fi bulundu. Ek olarak, amonyak i\u015fleme s\u00fcresi uzad\u0131k\u00e7a, k\u00fck\u00fcrt kusur piki giderek g\u00fc\u00e7lendi ve geni\u015fledi, bu da malzemedeki kusurlar\u0131n amonyak gaz\u0131n\u0131n i\u015flenmesiyle kademeli olarak artt\u0131\u011f\u0131n\u0131 kan\u0131tlad\u0131. \u00c7ok say\u0131da k\u00fck\u00fcrt bo\u015flu\u011funun mevcudiyeti, malzemenin lokal olarak pozitif bir y\u00fcke sahip olmas\u0131na neden olur, b\u00f6ylece polis\u00fclfid anyonlar\u0131n\u0131n adsorpsiyonunu artt\u0131r\u0131r ve etkili polis\u00fclfid inhibisyonu sa\u011flar.<\/div>\n<div>\u3010\u00f6zet\u3011<\/div>\n<div>Son y\u0131llarda, malzemelerdeki kusur kusurlar\u0131 \u00fczerine ara\u015ft\u0131rmalar \u00e7ok s\u0131cak bir konu haline geldi. Bununla birlikte, ara\u015ft\u0131rmalar\u0131n \u00e7o\u011fu hala kusurlar\u0131 anlama a\u015famas\u0131ndad\u0131r. Bu nedenle malzeme bilimcisi olarak d\u00fcnyay\u0131 tan\u0131mal\u0131 ve de\u011fi\u015ftirmeliyiz. Ara\u015ft\u0131rma s\u00fcrecinde, yaln\u0131zca kusurlar\u0131n mikroskobik d\u00fcnyas\u0131n\u0131 tan\u0131makla kalmamal\u0131, ayn\u0131 zamanda baz\u0131 sentetik veya haz\u0131rlay\u0131c\u0131 y\u00f6ntemlerle kusurlar\u0131 iyile\u015ftirmeli ve kontrol etmeliyiz. D\u00fc\u015fen \u00e7i\u00e7ekler kalpsiz \u015feyler de\u011fildir, Chunni&#039;ye daha fazla d\u00f6rtgen. Malzemenin performans\u0131n\u0131 d\u00fc\u015f\u00fcr\u00fcyor gibi g\u00f6r\u00fcnen kusurlar, y\u00f6nl\u00fc tasar\u0131mdan sonra malzemenin kendisi \u00fczerinde olumsuz bir etkiye sahip olmakla kalmaz, ayn\u0131 zamanda ara\u015ft\u0131rmac\u0131lara malzemeyi atomik seviyeden optimize etme imkan\u0131 sa\u011flar, b\u00f6ylece elektrot malzemesi daha iyi performansa sahip olur. bir b\u00fct\u00fcn olarak. Enerji depolama ve di\u011fer nano bilim ve malzeme m\u00fchendisli\u011findeki geni\u015f uygulamas\u0131n\u0131 geni\u015fletin.<\/div>\n<\/div>\n<\/div>\n<p><!-- .vgblk-rw-wrapper --><\/p>","protected":false},"excerpt":{"rendered":"<p>In recent research, the design and regulation of material properties by combining defect engineering is currently a research hotspot. In transition metal oxides, sulfides and other materials, the presence of defects will significantly change their electronic structure and chemical properties, thereby achieving their wide application in the field of energy storage and conversion. For example,&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/1695"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/comments?post=1695"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/posts\/1695\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/media?parent=1695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/categories?post=1695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/tr\/wp-json\/wp\/v2\/tags?post=1695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}