{"id":1486,"date":"2017-02-08T14:32:29","date_gmt":"2017-02-08T14:32:29","guid":{"rendered":"https:\/\/www.dbs.nus.edu.sg\/?p=1486"},"modified":"2020-03-21T07:29:28","modified_gmt":"2020-03-21T07:29:28","slug":"interactions-and-attachment-pathways-between-functionalized-gold-nanorods","status":"publish","type":"post","link":"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/","title":{"rendered":"INTERACTIONS AND ATTACHMENT PATHWAYS BETWEEN FUNCTIONALIZED GOLD NANORODS"},"content":{"rendered":"<p>Shu Fen Tan, Utkarsh Anand, and<span>\u00a0<\/span>Utkur Mirsaidov<\/p>\n<p>ACS Nano 2017 Jan 31. Epub 2017 Jan 31.<span>\u00a0<\/span><a href=\"http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/acsnano.6b07398\" target=\"_blank\" rel=\"noopener noreferrer\">DOI: 10.1021\/acsnano.6b07398<\/a><\/p>\n<p>Nanoparticle (NP) self-assembly has been recognized as an important technological process for forming ordered nanostructures. However, the detailed dynamics of the assembly processes remain poorly understood. Using in situ liquid cell transmission electron microscopy, we describe the assembly modes of gold (Au) nanorods (NRs) in solution mediated by hydrogen bonding between NR-bound cysteamine linker molecules. Our observations reveal that by tuning the linker concentration, two different NR assembly modes can be achieved. These assembly modes proceed via the (1) end-to-end and (2) side-to-side attachment of NRs at low and high linker concentrations in solution, respectively. In addition, our time-resolved observations reveal that the side-to-side NR assemblies can occur through two different pathways: (i) prealigned attachment, where two Au NRs prealign to be parallel prior to assembly, and (ii) postattachment alignment, where two Au NRs first undergo end-to-end attachment and pivot around the attachment point to form the side-to-side assembly. We attributed the observed assembly modes to the distribution of linkers on the NR surfaces and the electrostatic interactions between the NRs. The intermediate steps in the assembly reported here reveal how the shape and surface functionalities of NPs drive their self-assembly, which is important for the rational design of hierarchical nanostructures.<\/p>\n<p><a href=\"http:\/\/pubs.acs.org\/doi\/abs\/10.1021\/acsnano.6b07398\" target=\"_blank\" rel=\"noopener noreferrer\">Read online: ACS Nano<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nanoparticle (NP) self-assembly has been recognized as an important technological process for forming ordered nanostructures. <\/p>\n","protected":false},"author":1,"featured_media":1492,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[],"class_list":["post-1486","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cbis-publications"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>INTERACTIONS AND ATTACHMENT PATHWAYS BETWEEN FUNCTIONALIZED GOLD NANORODS - NUS Biological Sciences<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"INTERACTIONS AND ATTACHMENT PATHWAYS BETWEEN FUNCTIONALIZED GOLD NANORODS - NUS Biological Sciences\" \/>\n<meta property=\"og:description\" content=\"Nanoparticle (NP) self-assembly has been recognized as an important technological process for forming ordered nanostructures.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/\" \/>\n<meta property=\"og:site_name\" content=\"NUS Biological Sciences\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/NUSbiologicalsciences\/\" \/>\n<meta property=\"article:published_time\" content=\"2017-02-08T14:32:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-03-21T07:29:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.dbs.nus.edu.sg\/wp-content\/uploads\/sites\/7\/2020\/03\/TOC2-01.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2521\" \/>\n\t<meta property=\"og:image:height\" content=\"1261\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"nussdo\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"nussdo\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/\"},\"author\":{\"name\":\"nussdo\",\"@id\":\"https:\/\/www.dbs.nus.edu.sg\/#\/schema\/person\/49b52e0adf731af61b2678f59bb0e364\"},\"headline\":\"INTERACTIONS AND ATTACHMENT PATHWAYS BETWEEN FUNCTIONALIZED GOLD NANORODS\",\"datePublished\":\"2017-02-08T14:32:29+00:00\",\"dateModified\":\"2020-03-21T07:29:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/\"},\"wordCount\":227,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.dbs.nus.edu.sg\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.dbs.nus.edu.sg\/wp-content\/uploads\/sites\/7\/2020\/03\/TOC2-01.png\",\"articleSection\":[\"CBIS Publications\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/\",\"url\":\"https:\/\/www.dbs.nus.edu.sg\/2017\/02\/08\/interactions-and-attachment-pathways-between-functionalized-gold-nanorods\/\",\"name\":\"INTERACTIONS AND ATTACHMENT PATHWAYS BETWEEN FUNCTIONALIZED GOLD NANORODS - 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