Ultraviolet Deactivation of Silane-Functionalized Surfaces : A Scalable Approach for Patterned Nanoparticle Assembly

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Developing optoelectronic devices, biological or chemical sensors, displays, and other devices based on nanoparticles (NPs) requires designing tailored NP assemblies on solid substrates, and often with a given surface positioning. In our study, we discuss a new soft-lithographic method for patterning an organic layer, which is capable of binding gold nanoparticles (AuNPs) to the surface. AuNPs with a citrate shell were 17 nm in diameter and prepared by the Turkevich protocol. Our method is based on controlling the binding capability of (3-aminopropyl)trimethoxysilane (APTES)-coated surface by deactivating the −NH2 terminal groups of APTES under the action of UV-generated ozone in air. We show that partial and complete deactivation can be achieved depending on the atmosphere and exposure time. Using a shadow mask during irradiation, we furthermore show that our method can be applied for creating micron-scale arrays of NPs on APTES-coated substrates with a spatial resolution down to ∼1.5 μm, currently limited by the properties of the mask.

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530 Physik
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ultraviolet, surface, gold nanoparticles, assembly
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ISO 690SNEGIR, Sergii, Thomas HUHN, Johannes BONEBERG, Simon HAUS, Olivier PLUCHERY, Elke SCHEER, 2020. Ultraviolet Deactivation of Silane-Functionalized Surfaces : A Scalable Approach for Patterned Nanoparticle Assembly. In: The Journal of Physical Chemistry C. American Chemical Society (ACS). 2020, 124(35), pp. 19259-19266. ISSN 1932-7447. eISSN 1932-7455. Available under: doi: 10.1021/acs.jpcc.0c05671
BibTex
@article{Snegir2020-08-25Ultra-50692,
  year={2020},
  doi={10.1021/acs.jpcc.0c05671},
  title={Ultraviolet Deactivation of Silane-Functionalized Surfaces : A Scalable Approach for Patterned Nanoparticle Assembly},
  number={35},
  volume={124},
  issn={1932-7447},
  journal={The Journal of Physical Chemistry C},
  pages={19259--19266},
  author={Snegir, Sergii and Huhn, Thomas and Boneberg, Johannes and Haus, Simon and Pluchery, Olivier and Scheer, Elke}
}
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