Optical trapping-surface enhanced Raman spectroscopy (oT-SERS) for sensing single bioaerosol particles in air

拉曼光谱 生物气溶胶 室内生物气溶胶 纳米颗粒 材料科学 光谱学 分析化学(期刊) 粒子(生态学) 荧光 气溶胶 表面增强拉曼光谱 纳米技术 化学 拉曼散射 光学 环境化学 物理 海洋学 有机化学 量子力学 地质学
作者
Yukai Ai,Chuji Wang,Yong‐Le Pan,Gorden Videen
出处
期刊:Aerosol Science and Technology [Taylor & Francis]
卷期号:: 1-14
标识
DOI:10.1080/02786826.2024.2436617
摘要

A rapid and accurate method for the characterization and identification of airborne bioaerosol particles is highly desired. Surface-enhanced Raman spectroscopy (SERS) is an attractive technique because it combines the molecular fingerprints of Raman spectroscopy with the enhanced spectral sensitivity resulting from the interactions of metallic nanoparticles with aerosols. In this study, we integrated optical trapping (OT) with SERS to characterize single bioaerosol particles in air. This work demonstrates the first OT-SERS to measure Raman spectra of common airborne bioaerosols (pollens and fungal spores). We used commercial Ag-doped multiwall carbon nanotubes (MWNT) to validate the OT-SERS system. Experimentally, we showed that the Raman spectra intensity of single MWNT particles can be significantly enhanced by incorporating Ag nanoparticles. Five airborne bioaerosols were measured: three pollens (English oak, ragweed, and Arizona ash) and two fungal spores (Bermuda grass smut and Johnson grass smut). The enhanced Raman spectra from optically trapped particles achieved ∼100 times enhancement and are fluorescence-free. The enhanced OT-SERS are consistent with the regular Raman spectra, except for two bands at 754 cm−1 and 1372 cm−1, attributed to interactions between Ag nanoparticles and functional groups in thymine, adenine, or carboxylates on the particle surfaces. The intensity of the enhanced Raman signal, with an integration time of 3 s, is as strong as the regular Raman spectrum with an integration time of 60 s. Raman bands in the region of 500 - 1000 cm−1 which were barely resolvable or overwhelmed by fluorescence in regular Raman spectroscopy, are clearly resolved with OT-SERS.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
坚强枫完成签到,获得积分10
2秒前
tigebnb完成签到,获得积分10
3秒前
4秒前
庞呵呵完成签到,获得积分20
4秒前
juliar完成签到 ,获得积分10
4秒前
4秒前
5秒前
YuZhang8034完成签到,获得积分10
5秒前
5秒前
橘子发布了新的文献求助10
5秒前
快乐滑板发布了新的文献求助30
5秒前
5秒前
善学以致用应助雾霭迷茫采纳,获得10
6秒前
yar应助重要的奇异果采纳,获得10
6秒前
MOMO完成签到,获得积分10
6秒前
jj完成签到,获得积分10
7秒前
7秒前
7秒前
Tao2023完成签到,获得积分10
7秒前
7秒前
隐形曼青应助老实小懒猪采纳,获得10
8秒前
柏康娜发布了新的文献求助10
8秒前
霸气小欧完成签到,获得积分20
9秒前
jj发布了新的文献求助30
10秒前
柔弱翎完成签到 ,获得积分10
10秒前
Zll完成签到,获得积分10
10秒前
wizard完成签到,获得积分10
10秒前
Jasper应助zxy采纳,获得10
11秒前
Yve发布了新的文献求助10
12秒前
谢谢不会谢完成签到 ,获得积分10
12秒前
墨菲特发布了新的文献求助10
12秒前
科研通AI5应助shasha采纳,获得10
12秒前
味道发布了新的文献求助10
12秒前
13秒前
syt完成签到,获得积分10
13秒前
sh完成签到,获得积分10
13秒前
13秒前
善学以致用应助kyrie采纳,获得10
14秒前
15秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3970062
求助须知:如何正确求助?哪些是违规求助? 3514782
关于积分的说明 11175968
捐赠科研通 3250119
什么是DOI,文献DOI怎么找? 1795198
邀请新用户注册赠送积分活动 875630
科研通“疑难数据库(出版商)”最低求助积分说明 804951