Photothermal effect of gold nanostar patterns inkjet-printed on coated paper substrates with different permeability

Beilstein Journal of Nanotechnology

Piersandro Pallavicini¹  Elisa Cabrini¹  Giacomo Dacarro¹  Mykola Borzenkov²  Giuseppe Chirico²  Maddalena Collini²  Anni Määttänen³  Petri Ihalainen³ 

[1] Department of Chemistry, University of Pavia, viale Taramelli 12, 27100, Pavia, Italy;Department of Physics “G. Occhialini”, Nanomedicine Center, University of Milano-Bicocca, piazza dell’Ateneo Nuovo, 20126, Milan, Italy;Laboratory of Physical Chemistry, Center of Functional Materials, Åbo Academi University, Porthaninkatu 3-5, 20500, Turku, Finland;

关键词: gold nanostars;    inkjet printing;    localized surface plasmon resonance (LSPR);    photothermal effect;   

DOI  :  10.3762/bjnano.7.140

来源: DOAJ

【 摘 要 】

Inkjet printing of spherical gold nanoparticles is widely applied in the fabrication of analytical and diagnostics tools. These methods could be extended to non-spherical gold nanoparticles that can efficiently release heat locally when irradiated in the near infrared (NIR) wavelength region, due to localized surface plasmon resonance (LSPR). However, this promising application requires the ability to maintain high efficiency and tunability of the NIR LSPR of the printed nanoparticles. In this study stable inks containing PEGylated gold nanostars (GNS) were fabricated and successfully inkjet-printed onto differently coated paper substrates with different porosity and permeability. A pronounced photothermal effect was observed under NIR excitation of LSPR of the printed GNS patterns even at low laser intensities. It was found that beside the direct role of the laser intensity, this effect depends appreciably on the printing parameters, such as drop density (δ, drops/mm2) and number of printed layers, and, critically, on the permeability of the coated paper substrates. These results will promote the development of GNS-based printed platforms for local photothermal therapy.

【 授权许可】

Unknown