Nevárez Martínez María C, Kreft Dominik, Grzegorczyk Maciej, Mahlik Sebastian, Narajczyk Magdalena, Zaleska-Medynska Adriana, Morales Demosthenes P, Hollingsworth Jennifer A, Werner James H
Department of Environmental Technology, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States of America.
Nano Lett. 2025 Jan 8;25(1):230-235. doi: 10.1021/acs.nanolett.4c04872. Epub 2024 Dec 19.
Plasmonic nanoparticles are widely recognized as photothermal conversion agents, i.e., nanotransducers or nanoheaters. Translation of these materials into practical applications requires quantitative analyses of their photothermal conversion efficiencies (η). However, the value of η obtained for different materials is dramatically influenced by the experimental setup and method of calculation. Here, we evaluate the most common methods for estimating η (Roper's and Wang's) and compare these with numerical estimates using the simulation software ANSYS. Experiments were performed with colloidal gold nanorod solutions suspended in a hanging droplet irradiated by an 808 nm diode laser and monitored by a thermal camera. The ANSYS simulations accounted for both heating and evaporation, providing η values consistent with the Wang method but higher than the Roper approach. This study details methods for estimating the photothermal efficiency and finds ANSYS to be a robust tool where experimental constraints complicate traditional methods.
等离子体纳米颗粒被广泛认为是光热转换剂，即纳米换能器或纳米加热器。将这些材料转化为实际应用需要对其光热转换效率（η）进行定量分析。然而，不同材料获得的η值受到实验装置和计算方法的显著影响。在这里，我们评估了估计η的最常用方法（罗珀法和王法），并将这些方法与使用模拟软件ANSYS的数值估计进行比较。实验使用悬浮在悬挂液滴中的胶体金纳米棒溶液进行，该溶液由808 nm二极管激光器照射，并由热成像仪监测。ANSYS模拟考虑了加热和蒸发，提供的η值与王法一致，但高于罗珀法。本研究详细介绍了估计光热效率的方法，并发现ANSYS是一种强大的工具，在实验限制使传统方法复杂化的情况下尤为适用。
