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在适量的二异辛基磺化琥珀酸钠和柠檬酸钠表面修饰剂存在下,采用硼氢化钠还原硝酸银,在一定的水浴条件下合成出高产率的形貌规则的三角形纳米银片。透射电子显微镜、高分辨透射电子显微镜、原子力显微镜和X射线衍射仪表征表明,银纳米片是具有整齐的原子排列的良好单晶体。紫外-可见-近红外分光光度计表征表明,纳米银三角形片的面内偶极共振峰可达约1230nm的近红外波段。这种特殊的光谱学特征使得三角形纳米银片在光热触发释放药物、红外吸收及光纤等领域具有重要的用途。研究结果表明,只有在一定的二异辛基磺化琥珀酸钠浓度、反应时间及pH值条件下才能够获得高产率、形貌规则的三角形纳米银片。根据对三角形纳米银片生长过程的显微镜结构表征提出了以三角形框形成为框架的纳米三角形融合生长机制。
In the presence of appropriate amount of sodium diisosuccinate sulfosuccinate and sodium citrate surface modifier, sodium borohydride was used to reduce the silver nitrate, and the high-yield morphology triangular nanosheets were synthesized under certain water bath conditions. Transmission electronic microscopy, high resolution transmission electron microscopy, atomic force microscopy and X-ray diffraction characterization showed that the silver nanosheets are neat atomic arrangement of a good single crystal. UV - Vis - NIR spectrophotometer characterization showed that the in - plane dipole resonance peak of nanosilver triangular pieces can reach about 1230 nm in the near infrared band. This special spectroscopic characteristic makes the triangular nanosilver an important use in the fields of photothermal-triggered release of drugs, infrared absorption and optical fibers. The results show that only with a certain concentration of sodium diisoctyl sulfosuccinate, the reaction time and pH conditions can be obtained with high yield, morphology of triangular nano silver sheet. Based on the microstructure characterization of the growth process of the triangular nanosilver, a triangular triangular fusion growth mechanism with a triangular frame is proposed.