介孔SiO2薄膜与金银合金薄膜相结合材料
西安齐岳生物科技有限公司提供石墨烯、钙钛矿、量子点、纳米颗粒、空穴传输材料、纳米晶、半导体聚合物、过渡金属配合物、化学试剂、光电化学品、有机光电和半导体材料、化学品、医药中间体、材料中间体等一系列产品。
齐岳生物供应:
介孔生物玻璃涂层包覆镁合金
三维有序介孔Ni-B合金
纳米介孔非晶态合金
介孔Pt及PtRu合金薄膜
介孔二氧化硅复合涂层包覆的医用钛合金复合材料
介孔SiO2薄膜与金银合金薄膜相结合材料
介孔氧化物负载Ni-Pt合金
含介孔二氧化硅的生物镁合金
介孔镍钴合金材料
介孔涂层包覆镁合金材料
介孔Ru-B非晶态合金
介孔结构In-Sn纳米合金
介孔碳氮材料负载Ni基合金
介孔氧化硅核—壳复合材料
Au/Ag双金属合金催化剂
光沉积法合成介孔EP-TiO_2
介孔分子筛SBA-15负载Ni-B非晶态合金
介孔生物玻璃涂层包覆镁合金
介孔碳氮材料负载Ni基合金
医用镁合金表面介孔45S5生物活性玻璃
石墨化介孔碳纳米复合材料
介孔Ni-B合金
介孔碳氮材料负载Ni基合金
介孔纳米晶体金属氧化物材料
介孔金属氧化物及三维有序晶格阵列材料
晶化的介孔金属氧化物
石墨烯基有序介孔金属氧化物复合材料
有序介孔高温陶瓷材料
有序介孔金属有机膦酸盐和磺酸盐材料的合成
纳米及介孔金属氧化物材料
多级微介孔金属-有机框架材料
介孔金属硫化物纳米晶
两亲性嵌段共聚物导向合成有序介孔金属氧化物半导体材料
介孔金属膦酸盐杂化材料
多元介孔金属氧化物
介孔金属-有机骨架材料UMCM
有序介孔碳—金属氧化物纳米复合材料
金属嵌入骨架型钴-氧化硅介孔复合材料
金属纳米粒子/介孔碳复合电极材料
介孔SiO2薄膜与金银合金薄膜相结合材料
产品描述:通过对涂布在金银合金薄膜表面的硅基凝胶膜进行高温热处理次制备出均匀的大面积表面拉曼散射(Surface Enhanced Raman Scattering,SERS)基底.利用扫描电子显微镜观测到由硅基凝胶膜经高温脱模形成的介孔二氧化硅薄膜具有表面开口结构,基底的X射线能量色散(EDX)谱揭示了高温热处理引起金银合金薄膜中的银原子流失,从而导致薄膜的纳米构造.通过测试基底对Nile blue(NB)和Crystal violet(CV)拉曼活性分子的SERS光谱,观测到在玻璃衬底与50 nm厚的金银合金薄膜之间插入20 nm厚金薄膜能够基底的SERS因子.测试了基底在水溶液样品(50 nmol·L-1 CV)中的浸渍时间对SERS信号的影响,结果指出SERS信号随浸渍时间的增加而并在30min后稳定,15 min浸渍时间对应的SERS信号强度其稳定值的85%.比对实验指出CV的SERS光谱与其溶液的常规拉曼光谱的峰位*一致,揭示了介孔二氧化硅薄膜能够阻止SERS基底的金属成份对待测分子拉曼指纹谱的干扰.实验还证明了这种SERS基底对水溶液中NB的探测下限可达1 nmol·L-1.

Uniform large-area and high-performance surface enhanced Raman scattering(SERS) substrates were prepared for the first time by using a simple three-step method. The method contains sputtering deposition of an Au Ag alloy layer on the glass sheet and subsequent dip-coating of a sol-gel copolymer-templated silica film on the alloy layer and finally thermal treatment of the double-layer coated glass sheet in air at 450 ℃ for several hours. The thermal treatment leads to formation of the mesoporous silica(MS) film. The scanning electron microscope images show that the top layer of MS has the open-pore structure that facilitates rapid diffusion of small molecules into the film. The energy dispersive X-ray(EDX) spectroscopy analyses indicate that the thermal treatment of the substrate results in the loss of Ag atoms in the Au Ag alloy film accompanied with the nanostructure formation in the film. The systematic measurements of SERS spectra for Nile blue(NB) and Crystal violet(CV) demonstrate that the insertion of a 20-nm-thick gold layer between the glass sheet and a 50-nm-thick Au Ag alloy film can effectively increase the SERS enhancement factor of the substrate. Dependence of the SERS signal on the substrate immersion time was investigated with an aqueous solution of 50 nmol?L-1 CV, and the findings indicate that the intensity of SERS signal increases with increasing the immersion time up to 30 min after which the signal becomes stable. The SERS signal intensity detected 15 min after immersion is 85% of its stable value. The position of each peak in the SERS spectrum for the adsorbed CV molecules is perfectly identical to that in the conventional Raman spectrum obtained with the aqueous CV solution, giving a sign that the MS film enables to prevent the metal from interfering the positions of SERS peaks. The experimental results demonstrate that such novel SERS substrates have the detection limit of 1 nmol?L-1 NB.
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