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Title: Morphology-dependent resonance enhanced nonlinear photoacoustic effect in nanoparticle suspension: a temporal-spatial model
Authors: Zheng, Zesheng
Bindra, Anivind Kaur
Jin, Haoran
Sun, Quqin
Liu, Siyu
Zheng, Yuanjin
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Zheng, Z., Bindra, A. K., Jin, H., Sun, Q., Liu, S. & Zheng, Y. (2021). Morphology-dependent resonance enhanced nonlinear photoacoustic effect in nanoparticle suspension: a temporal-spatial model. Biomedical Optics Express, 12(12), 7280-7296.
Project: MOE2019-T2-2-179
Journal: Biomedical Optics Express
Abstract: The morphology-dependent resonances (MDRs) hotspot, ubiquity formed between the pairs of nanoparticles in close vicinity, has garnered considerable recent attention. By extending this phenomenon to pulse-laser irradiated nanoparticle suspension, we demonstrate that such collective optical/thermal enhancement can give rise to the nonlinear photoacoustic (PA) generation. In this study, a temporal-spatial analytical expression is derived to quantitatively describe the nonlinear PA signal generation from nanoparticles, incorporating the Grüneisen increase at the microscopic individual particle level and MRDs enhancement at the macroscopic suspension level. The dependence of PA nonlinearity on the critical contributors, including the laser pulse width, the particle size, and the statistical interparticle spacing, is quantitatively discussed. The theory is well validated with the finite element method (FEM) and experimentally proved with semiconducting polymer nanoparticles (SPN) suspension. This work may pave a new direction towards effective MDR based nonlinear PA contract agent design.
ISSN: 2156-7085
DOI: 10.1364/BOE.434207
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for noncommercial purposes and appropriate attribution is maintained. All other rights are reserved.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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