三维结构Au-ZnO-Au复合纳米棒调控制备及其SERS性能研究  

Controllable preparation of 3D structural Au-ZnO-Au composite nanorods and SERS properties

作　　者：李金琦 杨楠 闫森 郭延红[1] 张颖[2] LI Jinqi;YANG Nan;YAN Sen;GUO Yanhong;ZHANG Ying(School of Chemistry and Chemical Engineering,Yan’an University,Yan’an 716000;School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi’an 710119,China)

机构地区：[1]延安大学化学与化工学院,陕西延安716000 [2]陕西师范大学化学化工学院,陕西西安710119

出　　处：《延安大学学报（自然科学版）》2022年第2期111-120,共10页Journal of Yan'an University：Natural Science Edition

基　　金：国家自然科学基金项目(21173141);陕西省自然科学基金项目(2019JM-500);陕西省工业攻关项目(2011K08-14)。

摘　　要：为获得具有三维高密度热点分布的SERS活性基底材料,提出一种高效构筑具有高密度热点效应基底材料的方法,即以气/液界面法组装制备聚(苯乙烯-co-N-异丙基丙烯酰胺)@聚丙烯酸(PSN@PAA)二维胶体晶体。通过离子溅射法组装纳米Au粒子层得到大面积沉积Au纳米粒子层的胶体晶体Au复合基底材料,再以PSN@PAA/Au复合膜为基底,利用水热法在其表面调控生长ZnO纳米棒结构。进一步在PSN@PAA/Au-ZnO表面组装纳米Au,获得具有三维高密度热点分布的PSN@PAA/Au-ZnO-Au活性基底材料。以罗丹明6G(R6G)分子为探针分子进行SERS性能研究,结果表明:拉曼信号强度随ZnO纳米棒高度的增加而增强。基底对罗丹明6G的检出限为10^(-10)mol/L,主要拉曼峰强度的RSD约为10.23%,该基底具有很好的检测灵敏性和重复性。To obtain SERS active substrate materials with three-dimensional high-density hot spot distribution,an efficient method to construct substrate materials with high-density hot spot effect is proposed.The polystyrene-coN-isopropylacrylamide@polyacrylic acid(PSN@PAA)two-dimensional colloidal crystals were assembled by gasliquid interface technique,and the Au nanoparticles layer were deposited onto PSN@PAA/Au composite films by ion sputtering method.Then,ZnO nanorods were controllably grown on the surface of PSN@PAA/Au composite film by hydrothermal method.Finally,the PSN@PAA/Au-ZnO-Au active substrate with three-dimensional highlydense hotspot was obtained by further assembly of gold nanoparticles onto the surface of PSN@PAA/Au-ZnO.The SERS activity was measured with rhodamine 6G(R6G)as the probe molecule.The results show that the intensity of Raman signal enhances with the increase of the ZnO nanorods height.The detection limit is of 10^(-10)mol/L.The RSD of main Raman peak intensity of R6G is about 10.2%,indicating that the constructed SERS-active substrate exhibits good sensitivity and reproductivity.The constructed PSN@PAA/Au-ZnO-Au with 3D structure has promising application in the fields of chemical and biological sensing,catalysis and photoelectric conversion.

关 键 词：二维胶体晶体 AU纳米粒子 ZNO纳米棒 表面增强拉曼散射 

分 类 号：O647[理学—物理化学]