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A single-step synthesis of gold nanochains using an amino acid as a capping agent and characterization of their optical properties

机译:使用氨基酸作为封端剂的金纳米链的一步合成及其光学性质的表征

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We demonstrated a simple single-step synthesis of gold nanochains by reducing aqueous chloroaurate ions (AuCl4-) with sodiumborohydride (NaBH4) in the presence of an amino acid (glutamic acid and histidine) as a stabilizer. The structure and optical properties of gold nanochains and nanowires were characterized by transmission electron microscopy, UV -visible spectroscopy, infrared spectroscopy and femtosecond z-scan measurements. The results suggested that the gold nanochains and nanowires were formed via the nanospheres fusing into one another by an oriented attachment mechanism through dipole -dipole interactions. The z-scan measurements on Au nanowires showed a transition from saturable absorption to reverse saturable absorption as the pump intensity increased.
机译:我们证明了通过在氨基酸(谷氨酸和组氨酸)作为稳定剂的存在下,用硼氢化钠(NaBH4)还原氯金酸盐离子(AuCl4-)来简单地一步合成金纳米链。金纳米链和纳米线的结构和光学性质通过透射电子显微镜,紫外可见光谱,红外光谱和飞秒z扫描测量来表征。结果表明,金纳米链和纳米线是通过纳米球通过偶极-偶极相互作用的定向附着机制相互融合而形成的。 Au纳米线上的z扫描测量结果显示,随着泵浦强度的增加,从饱和吸收跃迁到反向饱和吸收。

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