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Three-dimensional manipulation of gold nanoparticles with electro-enhanced capillary forces
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10.1063/1.3297903
/content/aip/journal/apl/96/4/10.1063/1.3297903
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/4/10.1063/1.3297903
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Figures

Image of FIG. 1.
FIG. 1.

A schematic representation of the electroenhanced capillary nanomanipulation technique. (a) Initial situation with the probe at some distance from the nanoparticle; (b) formation and growth of the water bridge by the application of a voltage pulse; (c) probe withdrawal and capillary force pulling the nanoparticle upwards; (d) nanoparticle detachment and displacement while attached to the probe; (e) release of the nanoparticle by contact with the substrate; (f) piezoretracted and nanoparticle in the final situation.

Image of FIG. 2.
FIG. 2.

A deflection-time trace obtained during a nanoparticle manipulation procedure. Shaded areas, associated to letters (a)–(g), represent the periods of time in when the pulse potential was applied (, ). Vertical lines, numbered 1–6, mark the times when the piezo was approached 5 nm to the surface. Initially, the probe was in contact with the nanoparticle with a deflection . The process began with a retraction of the piezo by 50 nm (piezo up I) and ended when the feedback was switched on (piezo down). Inset: zoom of the transition step (g), including the water-bridge formation (first negative peak) and the adhesion forces during nanoparticle detachment from the substrate (second negative peak, piezo up II). Experimental parameters: relative humidity , temperature , and cantilever spring constant .

Image of FIG. 3.
FIG. 3.

AFM images before [(a) and (c)] and after [(b) and (d)] two separate pick-and-place nanomanipulation experiments. (a) and (b) a 25 nm radius gold nanoparticles was moved from an initial position to a final position at away in a single step. (c) and (d) a 3D nanoparticle structure was formed by placement of a nanoparticle on top of a pre-existing nanoparticle conglomerate. The insets are the corresponding 3D images of the aggregates before (c) and after (d) the nanomanipulation process. Experimental parameters were as in Fig. 2.

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/content/aip/journal/apl/96/4/10.1063/1.3297903
2010-01-28
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Three-dimensional manipulation of gold nanoparticles with electro-enhanced capillary forces
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/4/10.1063/1.3297903
10.1063/1.3297903
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