Stability and Orientational Order of Gold Nanorods in Nematic Suspensions: A Small Angle X-ray Scattering Study
Stability and Orientational Order of Gold Nanorods in Nematic Suspensions: A Small Angle X-ray Scattering Study
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DOI：
10.1080/15421406.2015.1025204
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发表时间：
2015-03
影响因子：
0.7
通讯作者：
M. Thomas;J. Hallett;S. Klein;S. Mann;A. Perriman;R. Richardson
中科院分区：
文献类型：
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作者：
M. Thomas;J. Hallett;S. Klein;S. Mann;A. Perriman;R. Richardson
通过用聚乙二醇 (PEG) 覆盖纳米颗粒，制备了金纳米棒在 4-氰基-4'-戊基联苯 (5CB) 中的稳定悬浮液。小角度 X 射线散射已用于表征金纳米棒的取向顺序和任何聚集体的特性。研究发现，纳米棒相对于 5CB 矩阵的指向矢具有非常高的定向有序度，并且可以通过施加 2kHz 的电场来改变方向。研究了两种不同的 PEG 分子量，发现较低的 (1.9kDa) 给出了异常高的有序参数，高于 0.9。
Stable suspensions of gold nanorods in 4-cyano-4′-pentylbiphenyl (5CB) have been prepared by capping the nanoparticles with polyethylene glycol (PEG). Small angle X-ray scattering has been used to characterize the orientational order of the gold nanorods and the properties of any aggregates. It was found that the nanorods had a very high degree of orientational order with respect to the director of the 5CB matrix and this could be redirected by an applied electric field at 2kHz. Two different PEG molecular weights were investigated and it was found that the lower (1.9kDa) gave exceptionally high order parameters, above 0.9.