Extinction coefficient analysis of small alkanethiolate-stabilised gold nanoparticles
Extinction coefficient analysis of small alkanethiolate-stabilised gold nanoparticles
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DOI：
10.1016/j.cplett.2008.06.010
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发表时间：
2008-07-20
影响因子：
2.8
通讯作者：
Khlobystov, Andrei N.
中科院分区：
文献类型：
--
作者：
Rance, Graham A.;Marsh, Dan H.;Khlobystov, Andrei N.
在使用透射电子显微镜和紫外-可见光谱分析的系统研究中，首次确定了 1.95-3.77 nm 范围内的十二烷硫醇稳定的小金纳米颗粒的消光系数。通过改进的 Brust-Schiffrin 程序制备了六种多分散纳米粒子系统，并在纯化后作为分离的固体进行了研究。消光系数（epsilon*，单位为 mL mg (1) 和 epsilon，单位为 dm(3) mol (1) cm (1)）和平均纳米粒子核心直径（D，单位为 nm）之间已建立了明确的关系。观察到的关系允许简单地通过记录单个固定波长处的吸光度来预测未知纳米粒子系统的浓度或尺寸。 (C) 2008 Elsevier B.V. 保留所有权利。
Extinction coefficients of small dodecanethiolate-stabilised gold nanoparticles in the range 1.95-3.77 nm were determined for the first time in a systematic study using transmission electron microscopic and UV-vis spectroscopic analyses. Six polydisperse nanoparticle systems were prepared by a modified Brust-Schiffrin procedure and studied as isolated solids following purification. Clear relationships between extinction coefficient (epsilon*, in mL mg (1) and epsilon, in dm(3) mol (1) cm (1)) and mean nanoparticle core diameter (D, in nm) have been established. The observed relationships permit the prediction of concentration or size of unknown nanoparticle systems simply by recording the absorbance at a single fixed wavelength. (C) 2008 Elsevier B.V. All rights reserved.