中文摘要：

利用室温电子还原技术合成了一种金纳米颗粒与琼脂糖复合膜。合成过程采用氩气辉光放电为廉价电子源,方便快捷,绿色环保。通过紫外-可见（UV-Vis）分光光度计、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X射线衍射（XRD）仪、光电子能谱（XPS）等表征,发现可以通过改变氯金酸浓度调控复合膜中金纳米颗粒的分布,加入聚乙烯吡咯烷酮（PVP）可有效控制金纳米颗粒的形貌。由于复合膜具有金纳米颗粒密集排布的结构,可作为表面增强拉曼散射（SERS）活性基底。实验表明,以对氨基苯硫酚为探针,该复合膜作为SERS基底,SERS平均增强因子超过了106,检测限达到了10-12mol？L-1。除此之外,作为SERS基底,复合膜具有良好的均一性和稳定性。

英文摘要：

An Au nanoparticle/agarose composite film was fabricated using room temperature electron reduction with argon glow discharge as a cheap electron source. The synthetic procedure was facile, easy, and green. Characterization by UV-Vis spectrophotometry （UV-Vis）, transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, X-ray diffraction （XRD）, and X-ray photoelectron spectroscopy （XPS） revealed that the distribution of Au nanoparticles in the composite film could be tuned by varying the concentration of HAuCl4, while the shape ofAu nanoparticles could be controlled by adding polyvinyl pyrrolidone （PVP）. The Au nanoparticles were closely packed in the composite film, making an excellent surface enhanced Raman scattering （SERS）-active substrate. A SERS enhanced factor （EF） of over 106 and detection limit as low as 10^-2 mol·L^-1 were obtained for SERS detection using 4-aminothiophenol （4-ATP） as the probe. Moreover, the composite film possessed good uniformity and stability as a SERS substrate.