一种新型碳基复合薄膜的制备及其用于火炸药SERS检测的性能

Preparation of a New Carbon-based Composite Film and its Performance for SERS Detection of Explosives

采用微波等离子体化学气相沉积(MPCVD)方法制备了一种新型金刚石-多层石墨烯纳米杂化(DMGN)的碳基复合薄膜,该薄膜具有三维多孔形貌。DMGN基底对探针分子结晶紫(CV)的表面增强拉曼散射(SERS)检测结果显示出低的检测限(LOD达10^(-8) mol/L)和大的增强因子(EF为4.34×10^(2)),且均匀性好;经过过氧化氢氧化处理后的氧化DMGN(O-DMGN)基底对CV分子的SERS检测性能进一步提高(LOD达10^(-10) mol/L,EF值为4.09×10^(5))。将O-DMGN基底应用于实际火炸药分子二氨基二硝基乙烯(FOX-7)的检测,测定的LOD值可达10^(-6) mol/L,EF值为527。表明制备的三维多孔纳米杂化薄膜具有实现对含能化合物高灵敏度、高稳定性SERS检测的巨大潜力。

A novel diamond-multilayer graphene nanohybrid(DMGN)film was prepared by microwave plasma chemical vapor deposition(MPCVD).The film has a novel three-dimensional porous morphology.The surface-enhanced Raman scattering(SERS)results of DMGN substrate-to-probe molecule crystal violet(CV)showed low detection limit(LOD up to 10^(-8) mol/L)and high enhancement factor(EF up to 4.34×10^(2))with good homogeneity.The SERS detection performance of CV molecule was further improved(LOD up to 10^(-10) mol/L and EF value up to 4.09×10^(5))by oxidizing DMGN(O-DMGN)substrate with hydrogen peroxide.The O-DMGN substrate was applied to the determination of the actual explosive molecule diamino dinitroethylene(FOX-7),and the LOD value could reach 10^(-6) mol/L,and the EF value was 527.This research shows that the prepared three-dimensional porous nanohybrid film has great potential to realize SERS detection of energetic compounds with high sensitivity and high stability.