表面增强拉曼光谱(SERS)技术以其便捷性、灵敏性和指纹特征,可用于检测环境中微量的多环芳烃。制备的新型SERS基底,由硫醇修饰的银纳米线-石墨烯-金纳米球叠层复合而成,具有丰富的电磁场增强区域,能够通过π-π堆积作用和疏水作用协同选择性吸附环境中的多环芳烃,实现对其拉曼信号的放大。该基底对芘、苯并芘、蒽、菲的最低检测浓度均为10-6mol/L,特征峰强度与浓度对数的相关性系数均大于0.98,且具有良好的均一性。该材料能够快速、准确地实现对多环芳烃的定性和定量检测,为改善化工生产和环境中多环芳烃的污染形势提供技术支持。
Surface Enhanced Raman Spectroscopy (SERS) technology can be used to detect trace amounts of polycyclic aromatic hydrocarbons (PAHs) in the environment due to its convenience,sensitivity and fingerprint characteristics.A new type of SERS substrates,composed of hierarchical thiol-modified silver nanowire-graphene-gold nanosphere,is able to induce rich electromagnetic field enhanced area and synergistically selectively adsorb PAHs in the environment through π-π stacking interaction and hydrophobic interaction,achieving the amplification of Raman signal of PAHs.The minimum detection concentration of pyrene,benzopyrene,anthracene,and phenanthrene by this substrate was 10-6 mol/L,and the correlation coefficients of the characteristic peak intensity and the logarithm of the concentration were all larger than 0.98,as well as the substrates had good uniformity.The SERS substrates can quickly and accurately realize the qualitative and quantitative detection of polycyclic aromatic hydrocarbons,which could provide technical support for improving the pollution situation of polycyclic aromatic hydrocarbons in the chemical production and the environment.
[1] Cochran R E,Dongari N,Jeong H,et al.Determination of polycyclic aromatic hydrocarbons and their oxy-,nitro-,and hydroxy-oxidation products[J].Analytica Chimica Acta,2012,740:93-103.
[2] Haritash A K,Kaushik C P.Biodegradation aspects of polycyclic aromatic hydrocarbons (PAHs):a review[J].Journal of Hazardous Materials,2009,169(1-3):1-15.
[3] 陈颖,魏颖娜,徐静,等.氨气还原氮化法制备Au-TiN复合薄膜及其SERS效应研究[J].化工新型材料,2020,48(2):66-69.
[4] Zhao W,Xiao S,Zhang Y,et al.Binary “island” shaped arrays with high-density hot spots for surface-enhanced Raman scattering substrates[J].Nanoscale,2018,10(29):14220-14229.
[5] 刘蕊华,王哲哲,林林,等.纸基GO/贵金属纳米复合材料的SERS性能研究[J].功能材料,2019,50(11):11133-11137.
[6] Yilmaz M,Babur E,Ozdemir M,et al.Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy[J].Nature Materials,2017,16(9):918-924.
[7] Wu Y,Choi N,Chen H,et al.Performance evaluation of surface-enhanced Raman scattering-polymerase chain reaction sensors for future use in sensitive genetic assays[J].Analytical Chemistry,2020,92(3):2628-2634.
[8] 苗海环,田彦婷,聂仲泉,等.基于氧化石墨烯/金纳米棒复合基底的SERS性能分析[J].化工新型材料,2018,46(6):152-155.
[9] Lee Y,A.Kamal A S,Abasaki M,et al.Gap plasmons multiple mirroring from spheres in pyramids for surface-enhanced Raman scattering[J].ACS Photonics,2016,3(12):2405-2412.
[10] Li J F,Huang Y F,Ding Y,et al.Shell-isolated nanoparticle-enhanced Raman spectroscopy[J].Nature,2010,464(7287):392-395.
[11] Dick L A,McFarland A D,Haynes C L,et al.Metal film over nanosphere (MFON) electrodes for surface-enhanced Raman spectroscopy (SERS):improvements in surface nanostructure stability and suppression of irreversible loss[J].The Journal of Physical Chemistry B,2002,106(4):853-860.
[12] Hakonen A,Svedendahl M,Ogier R,et al.Dimer-on-mirror SERS substrates with attogram sensitivity fabricated by colloidal lithography[J].Nanoscale,2015,7(21):9405-9410.
[13] Lay C L,Koh C S L,Wang J,et al.Aluminum nanostructures with strong visible-range SERS activity for versatile micropatterning of molecular security labels[J].Nanoscale,2018,10(2):575-581.
[14] Lee T,Wi J S,Oh A,et al.Highly robust,uniform and ultra-sensitive surface-enhanced Raman scattering substrates for microRNA detection fabricated by using silver nanostructures grown in gold nanobowls[J].Nanoscale,2018,10(8):3680-3687.
[15] Hahm E,Jeong D,Cha M G,et al.β-CD dimer-immobilized Ag assembly embedded silica nanoparticles for sensitive detection of polycyclic aromatic hydrocarbons[J].Scientific Reports,2016,6(1):1-7.
[16] Tijunelyte I,Betelu S,Moreau J,et al.Diazonium salt-based surface-enhanced Raman spectroscopy nanosensor:detection and quantitation of aromatic hydrocarbons in water samples[J].Sensors,2017,17(6):1198.
[17] Zeng F,Xu D,Zhan C,et al.Surfactant-free synthesis of graphene oxide coated silver nanoparticles for Sers biosensing and intracellular drug delivery[J].ACS Applied Nano Materials,2018,1(6):2748-2753.
[18] Phan-Quang G C,Yang N,Lee H K,et al.Tracking airborne molecules from afar:three-dimensional metal-organic framework-surface-rnhanced Raman scattering platform for stand-off and real-time atmospheric monitoring[J].ACS Nano,2019,13(10):12090-12099.
[19] Lay C L,Koh C S L,Wang J,et al.Aluminum nanostructures with strong visible-range SERS activity for versatile micropatterning of molecular security labels[J].Nanoscale,2018,10(2):575-581.
[20] Tran V,Walkenfort B,König M,et al.Rapid,quantitative,and ultrasensitive point-of-care testing:a portable SERS reader for lateral flow assays in clinical chemistry[J].Angewandte Chemie International Edition,2019,58(2):442-446.
[21] Lee T,Wi J S,Oh A,et al.Highly robust,uniform and ultra-sensitive surface-enhanced Raman scattering substrates for microRNA detection fabricated by using silver nanostructures grown in gold nanobowls[J].Nanoscale,2018,10(8):3680-3687.
