{"id":74117,"date":"2025-06-11T16:30:31","date_gmt":"2025-06-11T14:30:31","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=74117"},"modified":"2025-06-17T08:09:21","modified_gmt":"2025-06-17T06:09:21","slug":"when-extreme-confinement-dictates-the-structure-and-quantum-properties-of-matter","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/when-extreme-confinement-dictates-the-structure-and-quantum-properties-of-matter.html","title":{"rendered":"When extreme confinement dictates the structure and quantum properties of matter"},"content":{"rendered":"<div  class='flex_column av-2i4h02-bbe5a3c1d5e5d409c4f1030f43261cdd av_one_full  avia-builder-el-0  el_before_av_three_fourth  avia-builder-el-first  first flex_column_div'     ><section  class='av_textblock_section av-mbrxpkk7-7040f1c2c689973f8b31f13e8ad90973'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2 style=\"font-weight: 400; text-align: center;\"><strong><span style=\"color: #e88215;\">When extreme confinement dictates the structure and quantum properties of matter<\/span><\/strong><\/h2>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-mbs22tt6-f2faba0fda58533240961bfeea1d4fdb'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h6 style=\"text-align: center;\"><em><span style=\"color: #e88215;\">Discover how scientists are transforming carbon nanotubes into veritable nanoscopic factories capable of creating one-dimensional structures with unique properties, paving the way for revolutionary innovations in electronics and medicine.<\/span><\/em><\/h6>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mbryb39x-5666b5e107213217d937cef5d7490e44\">\n#top .hr.av-mbryb39x-5666b5e107213217d937cef5d7490e44{\nmargin-top:10px;\nmargin-bottom:30px;\n}\n.hr.av-mbryb39x-5666b5e107213217d937cef5d7490e44 .hr-inner{\nwidth:500px;\nborder-color:#e88215;\nmax-width:45%;\n}\n.hr.av-mbryb39x-5666b5e107213217d937cef5d7490e44 .av-seperator-icon{\ncolor:#e88215;\n}\n<\/style>\n<div  class='hr av-mbryb39x-5666b5e107213217d937cef5d7490e44 hr-custom  avia-builder-el-3  el_after_av_textblock  avia-builder-el-last  hr-center hr-icon-yes'><span class='hr-inner inner-border-av-border-fat'><span class=\"hr-inner-style\"><\/span><\/span><span class='av-seperator-icon' aria-hidden='true' data-av_icon='\ue86f' data-av_iconfont='entypo-fontello'><\/span><span class='hr-inner inner-border-av-border-fat'><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/p><\/div>\n<div  class='flex_column av-1c3xes2-a67e5d772b96fc2f83b9858eb1d0b236 av_three_fourth  avia-builder-el-4  el_after_av_one_full  el_before_av_one_fourth  first flex_column_div  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mbrxqyt0-f4ece25238a036fb72e5c739927160b9\">\n#top .av_textblock_section.av-mbrxqyt0-f4ece25238a036fb72e5c739927160b9 .avia_textblock{\ntext-align:justify;\n}\n<\/style>\n<section  class='av_textblock_section av-mbrxqyt0-f4ece25238a036fb72e5c739927160b9'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-74099 aligncenter\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF.jpg\" alt=\"\" width=\"800\" height=\"428\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF.jpg 1516w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF-300x161.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF-1030x552.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF-768x411.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF-18x10.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF-1500x803.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/06\/imageEF-705x378.jpg 705w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><\/p>\n<blockquote><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-6-c185c27102143446c3d56f6c057e34de\">\n.av_font_icon.av-mqde7m-1-6-c185c27102143446c3d56f6c057e34de{\ncolor:#e88215;\nborder-color:#e88215;\n}\n.av_font_icon.av-mqde7m-1-6-c185c27102143446c3d56f6c057e34de .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-6-c185c27102143446c3d56f6c057e34de avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue897' data-av_iconfont='entypo-fontello' ><\/span><\/span>An international collaboration bringing together J. Sloan and R. J. Kashtiban (University of Warwick, UK), E. Faulques and N. Kalashnyk (University of Lille, IEMN), S. Cordier and Y. Molard (University of Rennes, ISCR), J.-L. Duvail (University of Nantes, IMN), and V. G. Ivanov (University of Sofia, Bulgaria) recently presented a significant breakthrough for nanoscience.<\/p>\n<\/blockquote>\n<p>The results are based on observations by high-resolution electron microscopy (HRTEM) and Raman spectroscopy on new hybrids formed by encapsulating an octahedral molybdenum cluster compound, Cs<sub>2<\/sub>Mo<sub>6<\/sub>Br<sub>14<\/sub>, which is phosphorescent in the near-infrared, inside single-walled carbon nanotubes (SWCNTs) of various diameters. The insertion of these clusters into the nanotubes could allow tuning of the optical properties of the hybrids for future applications in telecommunications and biomedicine, notably within the transparency windows of this spectral region. However, another remarkable property has been observed: when the inner\u00a0 diameter of the SWCNTs becomes comparable to the external diameter of the molecular anion [Mo<sub>6<\/sub>Br<sub>14<\/sub>]<sup>2\u2212<\/sup>, the steric confinement imposed by the nanotube triggers an elimination process leading to the formation of [Mo<sub>2<\/sub>Br<sub>6<\/sub>]<sub>x\u00a0<\/sub>\u00a0entities, which <span lang=\"EN-GB\">can be regarded as <\/span>one-dimensional (1D) Ising-type structures. <strong>Each unit in the chain interacts only with its two immediate neighbors, like aligned nanomagnets.<\/strong><\/p>\n<h4><span style=\"color: #e88215;\">Such behavior opens up new possibilities in quantum computing and molecular electronics.<\/span><\/h4>\n<p>This study is part of a larger project aimed at understanding how, in SWCNTs with very small diameters, <b>extreme confinement can profoundly alter the electronic properties of encapsulated molecules or crystals, while inducing the emergence of original 1D structures.<\/b> For example, HgTe, which is semi-metallic and cubic in its bulk state, becomes a semiconductor with a 1D tetragonal structure. Similarly, SnSe is an orthorhombic semiconductor that adopts several 1D forms under confinement, including a semi-metallic hexagonal phase.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-w1rd82-0225625fe0851456658422fdb398c440\">\n.flex_column.av-w1rd82-0225625fe0851456658422fdb398c440{\nborder-width:12px;\nborder-color:#ede5da;\nborder-style:solid;\nborder-radius:20px 20px 20px 20px;\nbackground-color:#ede5da;\n}\n.flex_column.av-w1rd82-0225625fe0851456658422fdb398c440 .avia-divider-svg-top{\nleft:-12px;\nright:-12px;\nwidth:auto;\ntop:-12px;\nborder-radius:20px 20px 0 0;\n}\n.flex_column.av-w1rd82-0225625fe0851456658422fdb398c440 .avia-divider-svg-top svg{\nheight:50px;\nwidth:calc(100% + 1.3px);\nfill:#e88215;\n}\n<\/style>\n<div  class='flex_column av-w1rd82-0225625fe0851456658422fdb398c440 av_one_fourth  avia-builder-el-7  el_after_av_three_fourth  avia-builder-el-last  flex_column_div  column-top-margin'     ><div class='avia-divider-svg avia-divider-svg-opacity-tilt avia-divider-svg-top avia-svg-original'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 2600 131.1\" preserveaspectratio=\"none\">\n\t<path d=\"M0 0L2600 0 2600 69.1 0 0z\"\/>\n\t<path style=\"opacity:0.5\" d=\"M0 0L2600 0 2600 69.1 0 69.1z\"\/>\n\t<path style=\"opacity:0.25\" d=\"M2600 0L0 0 0 130.1 2600 69.1z\"\/>\n<\/svg><\/div><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mbrysk4o-a0157d519a76f71d116d0214b0ed7d55\">\n#top .hr.hr-invisible.av-mbrysk4o-a0157d519a76f71d116d0214b0ed7d55{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-mbrysk4o-a0157d519a76f71d116d0214b0ed7d55 hr-invisible  avia-builder-el-8  el_before_av_textblock  avia-builder-el-first  av-small-hide av-mini-hide'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-mbry5tz0-67ac91b09cecf68eff34ef6c7b75b54c'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-1-6-2-676d7389fa4639f7a25fcce5e2460496\">\n.av_font_icon.av-mqde7m-1-6-2-676d7389fa4639f7a25fcce5e2460496{\ncolor:#f16728;\nborder-color:#f16728;\n}\n.av_font_icon.av-mqde7m-1-6-2-676d7389fa4639f7a25fcce5e2460496 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-1-6-2-676d7389fa4639f7a25fcce5e2460496 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue84d' data-av_iconfont='entypo-fontello' ><\/span><\/span><strong>Article\u00a0 :<\/strong> Faulques, E., Ivanov, V. G., Cordier, S., Kashtiban, R. J., Molard, Y., Duvail, J.-L., Kalashnyk, N., &amp; Sloan, J. (2025). Journal of the American Chemical Society, 147(9), 7345\u20137359. <a href=\"https:\/\/doi.org\/10.1021\/jacs.4c14883\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1021\/jacs.4c14883<\/a><\/p>\n<p><span style=\"color: #f16728;\"><strong>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-11665d57be50482f466d54b8a3268ec6\">\n.av_font_icon.av-mqde7m-11665d57be50482f466d54b8a3268ec6{\ncolor:#f16728;\nborder-color:#f16728;\n}\n.av_font_icon.av-mqde7m-11665d57be50482f466d54b8a3268ec6 .av-icon-char{\nfont-size:25px;\nline-height:25px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-11665d57be50482f466d54b8a3268ec6 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/strong><\/span>Contact : eric.faulques<img loading=\"lazy\" decoding=\"async\" class=\"align=absbottom wp-image-73335 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6.png\" alt=\"\" width=\"16\" height=\"14\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6.png 16w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2025\/05\/arobase6-14x12.png 14w\" sizes=\"auto, (max-width: 16px) 100vw, 16px\" \/>univ-lille.fr<\/p>\n<\/div><\/section><\/p><\/div><\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-74117","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/74117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=74117"}],"version-history":[{"count":7,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/74117\/revisions"}],"predecessor-version":[{"id":74459,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/74117\/revisions\/74459"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=74117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=74117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=74117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}