{"id":21395,"date":"2024-03-10T03:11:23","date_gmt":"2024-03-09T21:41:23","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=21395"},"modified":"2025-04-06T11:56:46","modified_gmt":"2025-04-06T06:26:46","slug":"gold-nanoparticles","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/gold-nanoparticles\/","title":{"rendered":"Gold Nanoparticles"},"content":{"rendered":"<h2>About Gold Nanoparticles<\/h2>\n<ul>\n<li>Gold nanoparticles (AuNPs) are small gold particles with a\u00a0diameter of 1 to 100 nm.<\/li>\n<li>Once dispersed in water, AuNPs are also known as\u00a0colloidal gold.<\/li>\n<li>These are also called\u00a0as &#8216;gold bhasma,&#8217;<\/li>\n<li>Properties\n<ul>\n<li>Spherical AuNPs possess useful attributes such as size- and shape-related optoelectronic properties,\u00a0large surface-to-volume ratio,\u00a0excellent biocompatibility, and low toxicity.<\/li>\n<li>Important physical properties of AuNPs include\u00a0surface plasmon resonance (SPR) and the ability to quench fluorescence.<\/li>\n<li>Spherical AuNPs exhibit a range of colors (e.g., brown, orange, red and purple) in aqueous solution as the core size increases from 1 to 100 nm.<\/li>\n<li>These are not \u2013 toxic, not phototoxic, not genotoxic, non-irritant and non-sensitizing<\/li>\n<\/ul>\n<\/li>\n<li>Applications\n<ul>\n<li>Electronics:\u00a0Gold nanoparticles are designed for\u00a0use as conductors from printable inks to electronic chips. Nanoscale gold nanoparticles are being used to connect resistors, conductors, and other elements of an electronic chip.<\/li>\n<li>Photodynamic Therapy:\u00a0Near-IR absorbing gold nanoparticles produce heat when excited by light at wavelengths from 700 to 800 nm. This enables these nanoparticles to eradicate targeted tumors.<\/li>\n<li>Therapeutic Agent Delivery: Therapeutic agents can also be coated onto the surface of gold nanoparticles. The large surface area-to-volume ratio of gold nanoparticles enables their surface to be coated with hundreds of molecules<\/li>\n<li>Sensors \u2013 These are used in a variety of sensors. For example, a colorimetric sensor based on gold nanoparticles can identify if foods are suitable for consumption.<\/li>\n<li>Diagnostics: These\u00a0are also used to detect biomarkers in the diagnosis of heart diseases, cancers, and infectious agents.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is nanotechnology?<\/h3>\n<p>Nanotechnology is the manipulation of matter on a near-atomic scale to produce new structures, materials and devices. The technology promises scientific advancement in many sectors such as medicine, consumer products, energy, materials, and manufacturing.<\/p>\n<p><strong>Source:<\/strong> <a href=\"https:\/\/economictimes.indiatimes.com\/industry\/healthcare\/biotech\/healthcare\/gold-nanoparticles-can-help-arrest-ageing-experts\/articleshow\/108329282.cms?from=mdr\" target=\"_blank\" rel=\"nofollow noopener\">Gold nanoparticles can help arrest ageing: Experts<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gold Nanoparticles are small gold particles with a diameter of 1 to 100 nm.<\/p>\n","protected":false},"author":5,"featured_media":21396,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-21395","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/21395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=21395"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/21395\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/21396"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=21395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=21395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=21395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}