NanoPen: dynamic, low-power, and light-actuated patterning of nanoparticles.
NanoPen: dynamic, low-power, and light-actuated patterning of nanoparticles.
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DOI:
10.1021/nl901239a
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发表时间:
2009-08
期刊:
影响因子:
10.8
通讯作者:
Wu MC
中科院分区:
文献类型:
--
作者:
Jamshidi A;Neale SL;Yu K;Pauzauskie PJ;Schuck PJ;Valley JK;Hsu HY;Ohta AT;Wu MC
We introduce NanoPen, a novel technique for low optical power intensity, flexible, real-time reconfigurable, and large-scale light-actuated patterning of single or multiple nanoparticles such as metallic spherical nanocrystals, and one-dimensional nanostructures such as carbon nanotubes. NanoPen is capable of dynamically patterning nanoparticles over thousands of μm2 areas with light intensities <10 W/cm2 (using a commercial projector) within seconds. Various arbitrary nanoparticle patterns and arrays (including a 10×10 array covering a 0.025 mm2 area) are demonstrated using this capability. One application of NanoPen is presented through the creation of surface-enhanced Raman spectroscopy (SERS) hot-spots by patterning gold nanoparticles of 90 nm diameters with enhancement factors exceeding 107 and pico-molar concentration sensitivities.
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