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Trace detection of PFAS using plasmonic superlattice fabricated by femtosecond laser-induced near-field processing

使用飞秒激光诱导近场处理制造的等离子体超晶格对 PFAS 进行痕量检测

基本信息

批准号：
21K14444
负责人：
BAI SHI
金额：
$ 2万
依托单位：
Institute of Physical and Chemical Research
依托单位国家：
日本
项目类别：
Grant-in-Aid for Early-Career Scientists
财政年份：
2021
资助国家：
日本
起止时间：
2021-04-01 至 2023-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K14444/
关键词：
Femtosecond laser Laser reduction PFOA Near-field laser processing superstructure SERS near-field Multiphoton PFAS

项目摘要

In second year of the project, a deep study of laser near-field reduction of metallic ions was conducted.At first, a novel gold precursor, containing chloroauric acid and trisodium citrate, was developed. The laser beam irradiation though glass microspheres enabled focusing the laser beam at the backside of microsphere to form hollow gold nanostructures due to the laser reduction of gold ions. Significantly, I found that adding molybdenum disulfide quantum dots into the gold precursor, the reduction rate of gold ions was highly improved because of photochemical effect.Finally, we tested the selectivity of perfluorooctanoic acid (PFOA) using fabricated metallic superstructure array.

在项目的第二年，对激光近场还原金属离子进行了深入的研究。首先研制了含氯金酸和柠檬酸三钠的新型金前驱体。激光束通过玻璃微球照射，通过激光还原金离子，使激光束聚焦在微球背面形成空心金纳米结构。值得注意的是，我发现在金前驱体中加入二硫化钼量子点，由于光化学效应，金离子的还原速率得到了很大的提高。最后，我们利用预制金属上层结构阵列测试了全氟辛酸（PFOA）的选择性。