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基于铱的纳米杂化物：合成、表征、光学限幅及非线性光学性质

Iridium-Based Nanohybrids: Synthesis, Characterization, Optical Limiting, and Nonlinear Optical Properties.

作者信息

Chazapis Nikolaos, Stavrou Michalis, Papaparaskeva Georgia, Bunge Alexander, Turcu Rodica, Krasia-Christoforou Theodora, Couris Stelios

机构信息

Department of Physics, University of Patras, 26504 Patras, Greece.

Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research and Technology-Hellas (FORTH), 26504 Patras, Greece.

出版信息

Nanomaterials (Basel). 2023 Jul 22;13(14):2131. doi: 10.3390/nano13142131.

DOI:10.3390/nano13142131
PMID:37513142
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10385205/
Abstract

The present work reports on the synthesis and characterization of iridium (Ir)-based nanohybrids with variable chemical compositions. More specifically, highly stable polyvinylpyrrolidone (PVP) nanohybrids of the PVP-IrO and PVP-Ir/IrO types, as well as non-coated Ir/IrO nanoparticles, are synthesized using different synthetic protocols and characterized in terms of their chemical composition and morphology via X-ray photoelectron spectroscopy (XPS) and scanning transmission electron microscopy (STEM), respectively. Furthermore, their nonlinear optical (NLO) response and optical limiting (OL) efficiency are studied by means of the Z-scan technique, employing 4 ns laser pulses at 532 and 1064 nm. The results demonstrate that the PVP-Ir/IrO and Ir/IrO systems exhibit exceptional OL performance, while PVP-IrO presents very strong saturable absorption (SA) behavior, indicating that the present Ir-based nanohybrids could be strong competitors to other nanostructured materials for photonic and optoelectronic applications. In addition, the findings denote that the variation in the content of IrO nanoparticles by using different synthetic pathways significantly affects the NLO response of the studied Ir-based nanohybrids, suggesting that the choice of the appropriate synthetic method could lead to tailor-made NLO properties for specific applications in photonics and optoelectronics.

摘要

本工作报道了具有可变化学成分的铱（Ir）基纳米杂化物的合成与表征。更具体地说，使用不同的合成方案合成了PVP-IrO和PVP-Ir/IrO类型的高度稳定的聚乙烯吡咯烷酮（PVP）纳米杂化物以及未包覆的Ir/IrO纳米颗粒，并分别通过X射线光电子能谱（XPS）和扫描透射电子显微镜（STEM）对其化学成分和形态进行了表征。此外，采用Z扫描技术，使用532和1064 nm的4 ns激光脉冲，研究了它们的非线性光学（NLO）响应和光学限幅（OL）效率。结果表明，PVP-Ir/IrO和Ir/IrO体系表现出优异的OL性能，而PVP-IrO呈现出非常强的饱和吸收（SA）行为，这表明目前的Ir基纳米杂化物可能是光子和光电子应用中其他纳米结构材料的有力竞争对手。此外，研究结果表明，通过使用不同的合成途径改变IrO纳米颗粒的含量会显著影响所研究的Ir基纳米杂化物的NLO响应，这表明选择合适的合成方法可以为光子学和光电子学中的特定应用定制NLO特性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/d9a4eb0e2dc8/nanomaterials-13-02131-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/7b455dd6492e/nanomaterials-13-02131-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/0537b491036f/nanomaterials-13-02131-g002a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/7dc7bca0e578/nanomaterials-13-02131-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/08966bd290b9/nanomaterials-13-02131-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/d06fc09763a1/nanomaterials-13-02131-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/d2fa382fd0c3/nanomaterials-13-02131-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/d9a4eb0e2dc8/nanomaterials-13-02131-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/7b455dd6492e/nanomaterials-13-02131-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/0537b491036f/nanomaterials-13-02131-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/6c0de24ce7f0/nanomaterials-13-02131-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/af96293b1793/nanomaterials-13-02131-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/0122a3a9c9e5/nanomaterials-13-02131-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/7dc7bca0e578/nanomaterials-13-02131-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/08966bd290b9/nanomaterials-13-02131-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/d06fc09763a1/nanomaterials-13-02131-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/d2fa382fd0c3/nanomaterials-13-02131-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1f7/10385205/d9a4eb0e2dc8/nanomaterials-13-02131-g010.jpg

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