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						<h1 itemprop="headline">AMO Seminar - Lene Oddershede: &#039;Optical heating and manipulation of a single nanoparticle&#039;</h1>
						
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														Torsdag 18. april 2013,
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														&nbsp;kl. 15:15 -  16:00
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													<p class="news-event__info__item__ical-link"><a href="/aktuelt/nyhed/artikel/amo-seminar-lene-oddershede-optical-heating-and-manipulation-of-a-single-nanoparticle?tx_news_pi1%5Bformat%5D=ical&amp;type=9819&amp;cHash=c4b0a2df6740e9b7d2bcaab59a5befd1">Tilføj til kalender</a></p>
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														<p>Fys. Aud.</p>
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														<span itemprop="name">Grete Flarup</span>
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									<p>A precise control over individual nanoparticles has huge potential for nano-architectural purposes and for probing nano-scale interactions.
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<p>However, the absorption and heating associated with resonant irradiation of an individual gold nanoparticle can be extreme. Moreover, the heating of a nanoparticle cannot be theoretically predicted as the precise focal intensity distribution on the nanoscale is unknown and typically highly aberrated [1]. Utilizing a novel assay based on partitioning of lipophilic dyes between membrane phases we quantify the heating of an individual irradiated gold nanoparticle [2,3]. The heating of the particle is dependent on laser power, and for a nanorod, also on its orientation with respect to the laser polarization [4]. A dramatic and irreversible change in plasmonic behavior of a nanorod occurs at high illumination intensities as the nanorod restructures into a more spherical shape. Nanoparticles can be used inside living cells for precise force measurements [5], and the photo-thermal effect of metallic nanoparticles can be used to create localized heat gradients inside living cells thus investigating cellular responses to heat chocks.
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<p>[1] A. Kyrsting, P.M. Bendix, L.B. Oddershede, Mapping 3D focal intensity exposes the stable trapping positions of single nanoparticles, Nano Letters vol.13 p.31-35 (2013).
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<p>[2] A. Kyrsting, P.M. Bendix, D.G. Stamou, and L.B. Oddershede. Heat Profiling of Three-Dimensionally Optically Trapped Gold Nanoparticles using Vesicle Cargo Release. Nano Letters, vol 11 p.888-892 (2011).
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<p>[3] P.M. Bendix, S.N.S. Reihani and L.B. Oddershede. Direct measurements of heating by electromagnetically trapped gold nanoparticles on supported lipid bilayers. ACS Nano, vol. 4 p.2256-2262 (2010)
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<p>[4] H. Ma, P.M. Bendix, L.B. Oddershede. Large-Scale Orientation Dependent Heating from a Single Irradiated Gold Nanorod. Nano Letters vol.12 p.3954-3960 (2012)
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<p>[5] L.B. Oddershede. Force probing of individual molecules inside the living cell is now a reality. Nature Chemical Biology vol.8 p.879-886 (2012).
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<p><em>Coffee/tea and cake will be served from 15:05</em></p>
								
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