{"id":29440,"date":"2012-05-25T15:58:31","date_gmt":"2012-05-25T08:58:31","guid":{"rendered":"https:\/\/nano2.toolsmkt.com\/?p=3650"},"modified":"2012-05-25T15:58:31","modified_gmt":"2012-05-25T08:58:31","slug":"noise-helps-graphene-detect-gases","status":"publish","type":"post","link":"https:\/\/www.nanotec.or.th\/en\/noise-helps-graphene-detect-gases\/","title":{"rendered":"Noise helps graphene detect gases"},"content":{"rendered":"<p>An unusual parameter \u2013 low-frequency electronic noise \u2013 could be exploited to make selective and highly sensitive gas sensors based on pristine graphene. <!--more-->The finding means that the material no longer has to be functionalized for it to be able to detect different gases, nor does an array of devices (with each tuned to detect a certain chemical) need to be made.<\/p>\n<div>\n<p>\u201cWe found that adsorbed gases modify graphene\u2019s low-frequency noise spectra by inducing \u2018Lorentzian\u2019 components with distinctive features,\u201d explained team leader Alexander Balandin of the University of California Riverside. \u201cThe characteristic frequency, <em>f<\/em><sub><em>c<\/em><\/sub> of the Lorentzian noise bulges in graphene devices and is different for different chemicals, varying from <em>f<\/em><sub><em>c<\/em><\/sub>\u00a0=\u00a010\u201320\u00a0Hz to <em>f<\/em><sub><em>c<\/em><\/sub>\u00a0=\u00a01300\u20131600\u00a0Hz for tetrahydrofuran and chloroform vapours respectively&#8230;.<\/p>\n<p>http:\/\/nanotechweb.org\/cws\/article\/tech\/49618<!-- OAS AD 'Middle' begin --><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>An unusual parameter \u2013 low-frequency electronic noise \u2013 could be exploited to make selective and highly sensitive gas sensors based [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[34],"tags":[],"class_list":["post-29440","post","type-post","status-publish","format-standard","hentry","category-technology-update"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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