News Column

Chalmers University of Technology Details Findings in Nanotechnology

June 23, 2014

By a News Reporter-Staff News Editor at Nanotechnology Business Journal -- A new study on Nanotechnology is now available. According to news reporting originating in Gothenburg, Sweden, by VerticalNews journalists, research stated, "Plasmonic nanoantennas create locally strongly enhanced electric fields in so-called hot spots. To place a relevant nanoobject with high accuracy in such a hot spot is crucial to fully capitalize on the potential of nanoantennas to control, detect, and enhance processes at the nanoscale."

The news reporters obtained a quote from the research from the Chalmers University of Technology, "With state-of-the-art nanofabrication, in particular when several materials are to be used, small gaps between antenna elements are sought, and large surface areas are to be patterned, this is a grand challenge. Here we introduce self-aligned, bottom-up and self-assembly based Shrinking-Hole Colloidal Lithography, which provides (i) unique control of the size and position of subsequently deposited particles forming the nanoantenna itself, and (ii) allows delivery of nanoobjects consisting of a material of choice to the antenna hot spot, all in a single lithography step and, if desired, uniformly covering several square centimeters of surface."

According to the news reporters, the research concluded: "We illustrate the functionality of SHCL nanoantenna arrangements by (i) an optical hydrogen sensor exploiting the polarization dependent sensitivity of an Au-Pd nanoantenna ensemble; and (ii) single particle hydrogen sensing with an Au dimer nanoantenna with a small Pd nanoparticle in the hot spot."

For more information on this research see: Shrinking-Hole Colloidal Lithography: Self-Aligned Nanofabrication of Complex Plasmonic Nanoantennas. Nano Letters, 2014;14(5):2655-2663. Nano Letters can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Nano Letters -

Our news correspondents report that additional information may be obtained by contacting S. Syrenova, Chalmers, Dept. of Appl Phys, S-41296 Gothenburg, Sweden. Additional authors for this research include C. Wadell and C. Langhammer.

Keywords for this news article include: Sweden, Europe, Gothenburg, Nanotechnology

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Source: Nanotechnology Business Journal

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