加拿大阿尔伯塔大学张雪花教授：Plasmonic Nanostructures Grown from Reacting Droplet-in-Microwell Array on Flexible Films for Quantitative Surface-Enhanced Raman Spectroscopy in Plant Wearable In-situ Detection

报告题目：Plasmonic Nanostructures Grown from Reacting Droplet-in-Microwell Array on Flexible Films for Quantitative Surface-Enhanced Raman Spectroscopy in Plant Wearable In-situ Detection报 告 人：张雪花（加拿大阿尔伯塔大学教授）报告时间：2024年06月29日（星期六）下午14:30—15:30报告地点：制浆造纸工程国家重点实验室306会议室主办单位：轻工科学与工程学院 报告摘要：Plant wearable detection has garnered significant interest in advancing agricultural intelligence and promoting sustainable food production amidst the challenges of climate change. Accurately monitoring plant health and agrochemical residue levels necessitates qualities such as precision, affordability, simplicity, and non-invasiveness. Here, we introduce a novel attachable plasmonic film designed for on-site detection of agrochemical residues utilizing surface-enhanced Raman spectroscopy (SERS). By functionalizing a thin polydimethylsiloxane film with silver nanoparticles via controlled droplet reactions in micro-well arrays, we achieve a plasmonic film that not only maintains optical transparency for precise analyte localization but also conforms closely to the plant surface, facilitating highly sensitive SERS measurements. The reliability of this film enables accurate identification and quantification of individual compounds and their mixtures, boasting an ultra-low detection limit ranging from 10-16 M to 10-13 M, with minimal relative standard deviation. To showcase its potential, we conduct on-field detection of pesticide residues on fruit surfaces using a handheld Raman spectrometer. This advancement in fabricating plasmonic nanostructures on flexible films holds promise for expanding SERS applications beyond plant monitoring, including personalized health monitoring, point-of-care diagnosis, wearable devices for human-machine interface, and on-site monitoring of environmental pollutants. 报告人简介：Professor Xuehua Zhang completed her PhD in Biomedical Engineering from Shanghai Jiao Tong University. She first worked as an Endeavour Research Fellow in the Department of Applied Math, Australian National University in Canberra (capital of Australia).  She was then awarded with an Australian Research Council (ARC) Postdoctoral Fellowship in her early career, and later with the highly prestigious ARC Future Fellowship. From 2017 to present, she was a Professor and Canada Research Chair (Tier 1) at the Department of Chemical and Materials Engineering, University of Alberta.  Dr Zhang is focusing her research efforts on developing eco-friendly and sustainable technologies for clean energy and water treatment.