Laser pyrolysis in papers and patents

Abstract

This paper presents a critical review of laser pyrolysis. Although this technology is almost 60 years old, in literature many researchers, both from academia and industry, are still developing and improving it. On the contrary industrial applications are struggling to take off, if not in very restricted areas, although the technology has undoubted advantages that justify future development. The aim of this work consists in analysing a representative pool of scientific papers (230) and patents (121), from the last 20 years, to have an overview about the evolution of the method and try to understand the efforts spent to improve this technology effectively in academia and in industry. This study is important to provide a complete review about the argument, still missing in the literature. The objective is to provide an overview sufficiently broad and representative in the sources and to capture all the main ways in which laser pyrolysis has been used and with what distribution. The main focuses of the study are the analyses of the functions carried out by laser technologies, the application fields, and the types of used laser (i.e. models, power and fluence). Among the main results, the study showed that the main use of laser pyrolysis is to produce nanoparticles and coatings, the main materials worked by laser pyrolysis are silicon and carbon dioxide and the main searched properties in the products of laser pyrolysis are catalysts activity and electrical conductivity. CO2 lasers are the most used and the have high versatility compared to others. In conclusion, the study showed that laser pyrolysis is a consolidated technology within its main application fields (nanoparticles and coatings) for several years. Within this context, the technology has been developed on very different sizes and processes, obtaining a very wide range of results. Finally, these results may also have stimulated new areas of experimentation that emerged mainly in recent years and which concern biomedical applications, additive manufacturing, and waste disposal. Graphical abstract

Laser Processing of Flexible In-Plane Micro-supercapacitors: Progresses in Advanced Manufacturing of Nanostructured Electrodes

“…Laser pyrolysis is a process in which a laser is used to provide the required energy for the pyrolysis reaction of a solid, liquid, or gaseous reagent inside a reactor with a controlled atmosphere . The goal is to achieve the cleavage and subsequent recombination of the chemical bonds of the reactants to generate products of various materials, such as selective laser-induced conversion of polydimethylsiloxane to silicon carbide (SiC). , A particularly well-known field is the in situ growth of complex nanostructured three-dimensional (3D) graphene on a variety of target substrates, such as SiC, − polymers/biomass, − and heavy carbonaceous materials. , The formation of 3D graphene typically requires multiple steps, such as the dissociation of target substrate, the release of gases, and the recombination of remaining carbon atoms.…”

High-Precision Optical Excited Heaters Based on Au Nanoparticles and Water-Soluble Porphyrin

“…Gold (Au) nanoparticles (NPs) are extremely promising as heaters under optical excitation in the plasmon absorption band [1][2][3][4]. Moreover, depending on the morphology, the broad plasmon absorption band can be shifted to the red region of the spectrum, therefore various laser sources could be used for excitation [5,6].…”