{"id":3756,"date":"2019-06-11T10:56:22","date_gmt":"2019-06-11T05:26:22","guid":{"rendered":"http:\/\/iap.iisc.ac.in\/~abha\/?p=3756"},"modified":"2020-07-07T00:46:55","modified_gmt":"2020-07-06T19:16:55","slug":"study-of-electro-mechanical-actuation-in-designed-micro-interfaces","status":"publish","type":"post","link":"https:\/\/iap.iisc.ac.in\/~abha\/study-of-electro-mechanical-actuation-in-designed-micro-interfaces\/","title":{"rendered":"Study of Electro-mechanical Actuation in Designed Micro-interfaces"},"content":{"rendered":"\n

Load bearing capability of a multilayered structure demonstrated conjugative role of hybrid constituents including carbon nanotubes. The parametric evaluation of multi effects on actuation mechanism of designed materials is being explored. Mechanical motion of nanoscale objects has drawn tremendous interest in various fields like MEMS based devices for efficient ultrahigh actuation, tools for atomic manipulation, precise motion control in systems. Energy efficient tools etc. Our approach on developing opto-electronic actuators from carbon nanotubes has demonstrated vast variety of applications through the implementation of novel approaches to enhance actuation.
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Electric field induced ultra-high actuation in a bulk\ncarbon nanotube structure<\/strong><\/p>\n\n\n\n

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Figure: CNT sample loaded with copper oxide\nnano-particles. Electric field induced \u2018\u2018steady-state\u2019\u2019 actuation, in terms of\n(a) axial strain, in the CNT cellular structure as a function of the applied\nelectric-field in the axial direction.<\/p>\n\n\n\n

Reference: CA R B\nO N 6 7 ( 2 0 1 4 ) 5 4 6 \u20135 5 3 (https:\/\/doi.org\/10.1016\/j.carbon.2013.10.027<\/a>)<\/p>\n\n\n\n

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Capacitive behavior of carbon nanotube thin film\ninduced by deformed ZnO microspheres<\/strong><\/p>\n\n\n\n

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Figure: SEM image of the surface of a single ZnO microsphere.\nSimulation of hybrid ZnO single microsphere\/MWCNT structure. Cyclic response of\nthe device at different applied forces. Motion detection using the fabricated\nflexible device. (a) Photographs of the motion of the finger when it was\ngradually folded (I\u2013IV) and released (V\u2013VII). (b) The DC current response of the\ndevice.<\/p>\n\n\n\n

Reference: Nanotechnology\n28 (2017) 395101 (doi: 10.1088\/1361-6528\/aa7df7)<\/p>\n\n\n\n

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Coupling of photomechanical and electromechanical actuations in carbon Nanotubes<\/strong><\/p>\n\n\n\n

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Figure: (a) The induced displacement in the MWCNT\nsheet plotted with the exposure time of the IR source. (b) The induced strain\nis plotted with IR laser power varying from 17 to 34 mW. (c) Generation of the\nphotovoltage is shown with the IR exposure time. (d) Magnitude of photovoltage\nvariation with the IR power.<\/p>\n\n\n\n

Reference: Nanotechnology\n24 (2013) 105501 (DOI:\n10.1088\/0957-4484\/24\/10\/105501)<\/p>\n\n\n\n

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Giant actuation in bulk carbon nanotubes under coupled\nelectric and magnetic fields<\/strong><\/p>\n\n\n\n

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Figure: (a) Unequal separation of charges\nalong the radial direction of the CNT leading to an enhanced actuation under\nthe configuration of axial actuation. (b) Charge separation along the axial\ndirection of the CNT under the configuration of radial actuation. Displacement\nplotted against time for (c) axial (d) radial actuations. Arrows indicate the\ndirection of the induced torque.<\/p>\n\n\n\n

Reference: RSC\nAdv., 2015, 5, 26157\u201326162 (https:\/\/doi.org\/10.1039\/C5RA01174D<\/strong><\/a>)<\/p>\n\n\n\n

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Carbon nanotube coated fiber Bragg grating for photomechanical optic modulator<\/strong><\/p>\n\n\n\n

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Figure: SEM image of the CNT, coated around\ncircular surface of the FBG. the comparison of the Bragg wavelength shift\nobserved with respect to different wavelengths of light.<\/p>\n\n\n\n

Reference: Rev.\nSci. Instrum. 84, 095101 (2013) (https:\/\/doi.org\/10.1063\/1.4819742<\/a>)<\/p>\n\n\n\n

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Monitoring of ultraviolet pulse rate dependent photomechanical actuation in carbon nanotubes using fiber Bragg gratings<\/strong><\/p>\n\n\n\n

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Figure: Shift in\nthe Bragg wavelength of CNT-FBG is plotted with time to<\/p>\n\n\n\n

show pulse rate\ndependence.<\/p>\n\n\n\n

Reference: Appl.\nPhys. Lett. 104, 013104 (2014) (https:\/\/doi.org\/10.1063\/1.4860965<\/a>)<\/p>\n\n\n\n

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Effect of optical wavelength on photo induced strain\nsensitivity in carbon nanotubes using fiber Bragg grating<\/strong><\/p>\n\n\n\n

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Figure: Schematic of the experimental setup used for\ncontrolling and monitoring photo induced strain in CNT upon exposure to\ninfrared and visible wavelengths. Photo elastic characteristics of CNT-FBG\nsystem for five exposure cycles of IR and visible radiations; (a) Photo induced\nstrain as a function of increase in the IR power (17\u201334 mW); (b) Photo induced\nstrain as function of increase in visible power (10\u201370 mW).<\/p>\n\n\n\n

Reference: J. Phys. D: Appl. Phys. 48 (2015) 275502<\/p>\n\n\n\n

DOI: 10.1088\/0022-3727\/48\/27\/275502<\/p>\n\n\n\n

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Load bearing capability of a multilayered structure demonstrated conjugative role of hybrid constituents including carbon nanotubes. The parametric evaluation of multi effects on actuation mechanism of designed materials is being explored. Mechanical motion of nanoscale objects has drawn tremendous interest in various fields like MEMS based devices for efficient ultrahigh actuation, tools for atomic manipulation, […]<\/p>\n","protected":false},"author":1,"featured_media":3926,"parent":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[39],"tags":[],"class_list":["post-3756","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"acf":[],"_links":{"self":[{"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/posts\/3756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/comments?post=3756"}],"version-history":[{"count":9,"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/posts\/3756\/revisions"}],"predecessor-version":[{"id":4181,"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/posts\/3756\/revisions\/4181"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/media\/3926"}],"wp:attachment":[{"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/media?parent=3756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/categories?post=3756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iap.iisc.ac.in\/~abha\/wp-json\/wp\/v2\/tags?post=3756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}