title: Detection of dimethyl methylphosphonate by thin water film confined surface-enhanced Raman scattering method.
abstract: It is important and necessary to effectively detect the chemical warfare agents, such as highly toxic never agent sarin. However, based on the surface-enhanced Raman scattering (SERS) effect, detection of nerve agent simulant dimethyl methylphosphonate (DMMP) which is weakly interacted with SERS-active substrate has been the most challenge for the routine SERS detection method. To overcome this challenge, we put forward a thin water film confined SERS strategy. Under the space-confinement of water film, Raman measurements are carried out in the water evaporation process. The subsequent water evaporation induces concentrating of the DMMP molecules, which are thus successfully restricted within the strong electromagnetic field enhanced area above the SERS substrates, leading to the enhancement of their Raman signals. This study provides a new way to achieve the efficient SERS-based detection of the target molecules weakly interacted with the metal substrates.
authors.affiliation: Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China. Electronic address: duangt@issp.ac.cn.
authors.forename: Guotao
authors.initials: G
authors.lastname: Duan
authors.affiliation: Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China.
authors.forename: Guangqiang
authors.initials: G
authors.lastname: Liu
authors.affiliation: Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Li
authors.affiliation: The Third Department, Institute of Chemical Defence, Beijing 120205, PR China.
authors.forename: Zhengxing
authors.initials: Z
authors.lastname: Chen
authors.affiliation: East China Research Institute of Electronic Engineering, Hefei 230088, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Xu
authors.affiliation: Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China. Electronic address: wpcai@issp.ac.cn.
authors.forename: Weiping
authors.initials: W
authors.lastname: Cai
mesh_terms: D002619:Chemical Warfare Agents / Q000032:analysis*; D004574:Electromagnetic Fields; D053768:Metal Nanoparticles; D009943:Organophosphorus Compounds / Q000032:analysis*; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D002619:Chemical Warfare Agents; D009943:Organophosphorus Compounds; D014867:Water; C031116:dimethyl methylphosphonate
keywords: Confined; Evaporation; Nerve agent simulant; SERS; Thin water film