{"id":4931,"date":"2013-10-03T22:36:39","date_gmt":"2013-10-04T05:36:39","guid":{"rendered":"http:\/\/blogs.reed.edu\/chem201202\/?p=4931"},"modified":"2014-03-18T10:13:00","modified_gmt":"2014-03-18T17:13:00","slug":"atomic-force-microscope-takes-pictures-of-chemical-bonds","status":"publish","type":"post","link":"https:\/\/blogs.reed.edu\/chem201202\/2013\/10\/atomic-force-microscope-takes-pictures-of-chemical-bonds\/","title":{"rendered":"Atomic Force Microscope Takes Pictures of Chemical Bonds"},"content":{"rendered":"<p><a title=\"Atomic Force Microscopy animation\" href=\"http:\/\/virtual.itg.uiuc.edu\/training\/AFM_tutorial\/\" target=\"_blank\"><strong>Atomic force microscopy<\/strong><\/a> (AFM) is a imaging technique that works on a completely different principle from optical microscopes. Instead of magnifying light waves, an AFM device passes a needle-like probe over a surface and constructs an image of the surface based on subtle variations in the strength of probe-surface forces.<\/p>\n<p>AFM and related imaging techniques generated lots of buzz in the 90&#8217;s by providing images of molecules, even individual atoms, on surfaces. AFM has returned to the front page with even higher-resolution images that track the pathways electrons take in\u00a0 chemical bonds, even hydrogen bonds. Compare the white tracks in the AFM image (left) with the pattern of covalent and hydrogen bonds expected from the structural formulas (right) (click image to enlarge).<\/p>\n<p><a href=\"https:\/\/blogs.reed.edu\/chem201202\/files\/2013\/10\/09139-notw1-AFMfig2cxd.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-4932\" alt=\"from Science magazine\" src=\"https:\/\/blogs.reed.edu\/chem201202\/files\/2013\/10\/09139-notw1-AFMfig2cxd-300x127.jpg\" width=\"300\" height=\"127\" srcset=\"https:\/\/blogs.reed.edu\/chem201202\/files\/2013\/10\/09139-notw1-AFMfig2cxd-300x127.jpg 300w, https:\/\/blogs.reed.edu\/chem201202\/files\/2013\/10\/09139-notw1-AFMfig2cxd.jpg 700w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>For an easily digested description, see <a title=\"Hydrogen Bonds Visualized | C&amp;E News\" href=\"http:\/\/cen.acs.org\/articles\/91\/i39\/Hydrogen-Bonds-Visualized.html\" target=\"_blank\"><strong>&#8220;Hydrogen Bonds Visualized&#8221;<\/strong><\/a> in C&amp;ENews, 30 Sept, 2013. Or check out the original research article by <strong>J. Zhang<\/strong> et al, &#8220;Real-Space Identification of Intermolecular Bonding with Atomic Force Microscopy&#8221; (Science, 26 Sept 2013, DOI: <a title=\"Real-Space Identification of Intermolecular Bonding with Atomic Force Microscopy | Science 2013\" href=\"http:\/\/dx.doi.org\/10.1126\/science.1242603\" target=\"_blank\"><strong>10.1126\/science.1242603<\/strong><\/a>).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Atomic force microscopy (AFM) is a imaging technique that works on a completely different principle from optical microscopes. Instead of magnifying light waves, an AFM device passes a needle-like probe over a surface and constructs an image of the surface based on subtle variations in the strength of probe-surface forces. AFM and related imaging techniques [&hellip;]<\/p>\n","protected":false},"author":55,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-4931","post","type-post","status-publish","format-standard","hentry","category-post-lecture"],"_links":{"self":[{"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/posts\/4931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/comments?post=4931"}],"version-history":[{"count":6,"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/posts\/4931\/revisions"}],"predecessor-version":[{"id":5073,"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/posts\/4931\/revisions\/5073"}],"wp:attachment":[{"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/media?parent=4931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/categories?post=4931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.reed.edu\/chem201202\/wp-json\/wp\/v2\/tags?post=4931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}