Photo-Thermal Effects in 1D Gratings of Gold Nanoparticles

Abstract

This work investigates the heat delivered by a mono-layer 1D grating of gold nanoparticles (GNPs) created by photo-reduction through two-photon direct laser writing (2P-DLW) in a poly-vinyl alcohol (PVA) matrix doped with HAuCl 4 , under resonant laser radiation. We drop cast a film of a PVA + HAuCl 4 mixture onto a glass substrate, in which we create gratings of 1 mm 2 made by stripes of GNPs characterized by high polydispersivity. We demonstrate that, by controlling the pitch of the GNP stripes, we obtain different values of the photo-induced temperature variations. In the framework of thermo-plasmonics, the experimental investigation of the heat generation from a monolayer of gold nanoparticles represents a key element as a starting point to design thermo-smart platforms for sensing, solar energy harvesting and thermo-catalysis.

Hybrid Plasmonics for Energy Harvesting and Sensing of Radiation and Heat

“…[9,66] Discrete plasmonic structures like nanodisks have been widely used in thermoplasmonic systems as point-like heat sources, due to their high photothermal heating efficiency, tunability of their absorption resonance wavelength, narrow peak width, and possibility to use them in solution. [10,30,53,71,72] On the contrary, continuous plasmonic structures, such as perforated metal layers, have been mostly utilized as heat sinks to minimize plasmonic heating, by effectively dissipating heat generated from a small area illuminated by focused light. [73] However, for uniform illumination of larger arrays, the metal film can no longer act as a heat sink.…”

Photothermally Active Inorganic Nanoparticles: from Colloidal Solutions to Photothermally Active Printed Surfaces and Polymeric Nanocomposite Materials

“…Plasmonic gold and silver nanoparticles embedded in PEO nonofibres induced localized specially‐selective photothermal effect upon irradiation providing an opportunity to remotely control and correct materials properties (correction of defects, increase mechanical strength, control of thermally‐induced shape memory) . In a recent publication photothermally active layer of gold nanoparticles was created by photothermal reduction through two‐photon direct laser writing in a poly(vinyl alcohol) matrix doped with HAuCl 4 under resonant laser radiation . This approach can lead to the design of smart thermo‐platforms for sensing, solar energy harvesting and thermo‐catalysis.…”

Additive Manufacturing of Gold Nanostructures Using Nonlinear Photoreduction under Controlled Ionic Diffusion

“…Even though TPA was already discovered in 1930 by Marie Goeppert Mayer [ 29 ], it was not until the 1990s that it started to be fully exploited, discovering the optical properties and the plasmonic effects of AuNSs [ 18 , 30 , 31 ]. Since then, several authors explored the possibility of obtaining high complex 2D and 3D objects with sub-micron details for a wide range of materials and applications, from medical field for drug delivery [ 32 ], nano-heat sources [ 33 , 34 ], and microfluidic devices [ 35 , 36 ] to electronic components [ 37 , 38 ], design, or small satellites aiming to enhance the properties at the macroscale [ 4 , 25 ].…”