Local and deterministic trapping of single nanoparticles (NPs) has always been a challenging topic due to the difficulties faced at such a small particle size. These difficulties are concerned with the stability, simplicity, robustness, and efficiency of the used trapping technique. Here, we used two-photon polymerization (TPP) of a prefunctionalized photopolymer to obtain a nanometric polymer layer and selectively attract single colloidal gold NPs (AuNPs). Thanks to a deep photochemical study of the threshold energy, we identified a photopolymerization regime allowing one to tune the polymer size and immobilize single gold nanoparticles. This method is promising for the fabrication of single photon sources.
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| http://dx.doi.org/10.1021/acs.langmuir.2c03140 | DOI Listing |
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