【摘要】 报道了一种有效调节银纳米颗粒形貌的特殊方法.在不同浓度的CTAB有机分子作用下,片状三角形银纳米颗粒形貌发生改变,形成圆形和纺锤形等特殊形貌的银纳米片,研究了CTAB浓度对银纳米颗粒形貌的影响,从实验结果分析了银纳米颗粒形貌发生改变的主要因素.更多还原

【Abstract】 We reported on the dramatic chemical reshaping of silver nanoparticles upon exposure to cetylrimethylammonium bromide(CTAB) in aqueous solutions. In the presence of concentrated CTAB, the triangular silver nanoplates were observed to undergo a morphological change from truncated triangular, elliptic nanoplates to circular nanoplates. When dilute CTAB was employed, the triangular silver nanoplates were transformed into spindle silver nanoplates. Such transfigurations of silver nanoparticles were related to the concentration of bromide ions and organic groups of CTAB in the solutions. By changing the shape of silver nanopartilces their corresponding optical properties were tuned accordingly.更多还原