A visual photothermal paper sensor for H2S recognition through rational modulation LSPR wavelength of plasmonics

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（3）
• 页码范围: 368-374
• 页数: 7页
• 语种: 英文

摘要

It is known that the localized surface plasmon resonance (LSPR) wavelength ofplasmonics is highly dependent on compositions and geometry of plasmonics as well as the surrounding environments.Here,monodispersed Au@Ag core-shell nanoparticles (Au@Ag NPs) were prepared by carefully optimizing the shell thickness of Au@Ag NPs,and the presence of hydrogen sulfide (H2S) would significantly alter the LSPR wavelength.On the basis of this,a photothermal paper sensor for on-site recognition of H2S was constructed with a visual detection limit of 12.8 ng/L.