油胺也存在于纳米颗粒的表面，表明它具有帽化试剂的作用，能通过提供位阻保护作用防止测试纳米颗粒发生凝聚。
Oleylamine was also found on the surface of nanoparticles, indicating its role as capping agent which provided steric protection of as-synthesized nanoparticles from agglomeration.
红外光谱图中相应基团的变化和扫描电镜图中显示的表面形态变化说明可能发生了醚化和胺化的改性反应。
The change of related groups in FTIR spectrum and the change of surface on the SEM pictures indicated that the etherification and amination reactions took place.
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