Journal
NANO LETTERS
Volume 16, Issue 10, Pages 6529-6533Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b03174
Keywords
Nanofabrication; optical forces; plasmon assisted chemistry; polarization
Categories
Funding
- CONICET [PIO 13320130100199CO]
- ANCYPT [PICT-2009-0110, PICT-2010-2511, PICT-2013-0792]
- Max-Planck-Society
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Optical printing has been proved a versatile and simple method to fabricate arbitrary arrays of colloidal nanoparticles (NPs) on substrates. Here, we show that is also a powerful tool for studying chemical reactions at the single NP level. We demonstrate that 60 nm gold NPs immobilized by optical printing can be used as seeds to obtain larger NPs by plasmon-assisted reduction of aqueous HAuCl4. The final size of each NP is simply controlled by the irradiation time. Moreover, we show conditions for which the growth occurs preferentially in the direction of light polarization, enabling the in situ anisotropic reshaping of the NPs in predetermined orientations.
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