{"id":4595,"date":"2015-05-13T20:45:30","date_gmt":"2015-05-13T18:45:30","guid":{"rendered":"http:\/\/karmaka.de\/?p=4595"},"modified":"2015-05-13T21:26:53","modified_gmt":"2015-05-13T19:26:53","slug":"photoluminescence-of-silicon-vacancy-defects-in-nanodiamonds-of-different-chondrites-2","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=4595","title":{"rendered":"Photoluminescence of silicon-vacancy defects in nanodiamonds of different chondrites"},"content":{"rendered":"<p>Shiryaev, A. A., Fisenko, A. V., Semjonova, L. F., Khomich, A. A. and Vlasov, I. I. (2015)<\/p>\n<p>Meteoritics &#038; Planetary Science. doi: 10.1111\/maps.12450<\/p>\n<p><a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/maps.12450\/abstract\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\"><\/div><\/div>Photoluminescence spectra show that silicon impurity is present in lattice of some nanodiamond grains (ND) of various chondrites as a silicon-vacancy (SiV) defect. The relative intensity of the SiV band in the diamond-rich separates depends on chemical composition of meteorites and on size of ND grains. The strongest signal is found for the size separates enriched in small grains; thus, confirming our earlier conclusion that the SiV defects preferentially reside in the smallest (\u22642 nm) grains. The difference in relative intensities of the SiV luminescence in the diamond-rich separates of individual meteorites are due to variable conditions of thermal metamorphism of their parent bodies and\/or uneven sampling of nanodiamond populations. Annealing of separates in air eliminates surface sp2-carbon; consequently, the SiV luminescence is enhanced. Strong and well-defined luminescence and absorption of the SiV defect is a promising feature to locate cold (<250 \u00b0C) nanodiamonds in space.[\/su_quote]\n","protected":false},"excerpt":{"rendered":"<p>Shiryaev, A. A., Fisenko, A. V., Semjonova, L. F., Khomich, A. A. and Vlasov, I. I. (2015) Meteoritics &#038; Planetary Science. doi: 10.1111\/maps.12450 LINK Photoluminescence spectra show that silicon impurity is present in lattice of&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,76],"tags":[1392,687,843,1393,1389,110,1394],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/4595"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4595"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/4595\/revisions"}],"predecessor-version":[{"id":4596,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/4595\/revisions\/4596"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}