Lithographically-directed self-assembly of nanostructures

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The combination of lithography and self-assembly provides apowerful means of organizing solution-synthesized nanostructures for awide variety of applications. We have developed a fluidic assembly methodthat relies on the local pinning of a moving liquid contact line bylithographically produced topographic features to concentratenanoparticles at those features. The final stages of the assembly processare controlled first by long-range immersion capillary forces and then bythe short-range electrostatic and Van der Waal's interactions. We havesuccessfully assembled nanoparticles from 50 nm to 2 nm in size usingthis technique and have also demonstrated the controlled positioning ofmore complex nanotetrapod structures. We have used this process toassemble ... continued below

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Liddle, J. Alexander; Cui, Yi & Alivisatos, Paul September 21, 2004.

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The combination of lithography and self-assembly provides apowerful means of organizing solution-synthesized nanostructures for awide variety of applications. We have developed a fluidic assembly methodthat relies on the local pinning of a moving liquid contact line bylithographically produced topographic features to concentratenanoparticles at those features. The final stages of the assembly processare controlled first by long-range immersion capillary forces and then bythe short-range electrostatic and Van der Waal's interactions. We havesuccessfully assembled nanoparticles from 50 nm to 2 nm in size usingthis technique and have also demonstrated the controlled positioning ofmore complex nanotetrapod structures. We have used this process toassemble Au nanoparticles into pre-patterned electrode structures andhave performed preliminary electrical characterization of the devices soformed. The fluidic assembly method is capable of very high yield, interms of positioning nanostructures at each lithographically-definedlocation, and of excellent specificity, with essentially no particledeposition between features.

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  • Journal Name: Journal of Vacuum Science and Technology B; Journal Volume: 22; Journal Issue: 6; Related Information: Journal Publication Date: Nov/Dec 2004

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  • Report No.: LBNL--55804
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 882901
  • Archival Resource Key: ark:/67531/metadc892512

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 21, 2004

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  • Sept. 23, 2016, 2:42 p.m.

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  • Dec. 16, 2016, 1:14 p.m.

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Liddle, J. Alexander; Cui, Yi & Alivisatos, Paul. Lithographically-directed self-assembly of nanostructures, article, September 21, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc892512/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.