Two Photon Induced Pulsed Laser Polymerization with Near Infrared Light

Abstract

We introduce two-photon (2P) pulsed laser polymerization (PLP) at 800 nm, demonstrating its working principle even through biological tissue. We show that 2P PLP is reliable in determining propagation rate coefficients on the example of the free radical polymerization of methyl methacrylate (MMA) at frequencies ranging from 10 to 100 Hz.

Wavelength-resolved near infra-red light induced free-radical polymerization

“…There exist several powerful techniques that make use of NIR light to induce polymerizations, most notably two-photon induced polymerization emitted from high intensity lasers or using NIR-light sensitive photothermal converters. [41][42][43][44][45][46][47][48][49][50][51][52][53] Previous studies have reported two-photon induced polymerizations in the MHz regime, 44,[47][48][49][50][51] while our team introduced an NIRlight two-photon pulsed laser polymerization. 53 However, since two-photon absorption processes require very high intensities as well as a coherent light source, this technique is limited to high energy light sources, such as lasers.…”

“…[41][42][43][44][45][46][47][48][49][50][51][52][53] Previous studies have reported two-photon induced polymerizations in the MHz regime, 44,[47][48][49][50][51] while our team introduced an NIRlight two-photon pulsed laser polymerization. 53 However, since two-photon absorption processes require very high intensities as well as a coherent light source, this technique is limited to high energy light sources, such as lasers.…”

Design of High‐Performance Bilayer Solar Evaporator Using Graphene‐Coated Bamboo Prepared by Near‐Infrared Laser‐Induced Carbonization of Polystyrene

“…Laser-induced carbonization [26,27] is a new carbonization technology in recent years, which has unique advantages compared to traditional high-temperature carbonization of polymers. [28][29][30] 1) Laser can transfer energy to polymer molecules in a short period of time, rapidly reaching the carbonization temperature, thereby accelerating the reaction rate. 2) Laser has high selectivity and directionality, which can accurately control the position and area of heating, thus possessing more precise control capabilities.…”