Temperature dependent solubility of gold nanoparticle suspension/solutions
Temperature dependent solubility of gold nanoparticle suspension/solutions
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金纳米颗粒悬浮液/溶液的温度依赖性溶解度
DOI：
10.1039/c6ra15822f
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Sorensen, C. M.
中科院分区：
文献类型：
--
作者：
Powell, J. A.;Schwieters, R. M.;Bayliff, K. W.;Herman, E. N.;Hotvedt, N. J.;Changstrom, J. R.;Chakrabarti, A.;Sorensen, C. M.
我们提出了纳米颗粒（NP）悬浮液/溶液的热可逆溶解度的温度依赖性的测量。NPs为金，平均直径5.5 nm，与十二烷基硫醇连接。溶剂为甲苯-十二烷基硫醇混合物。温度依赖性分析得出溶解焓ΔHd = 20.9 kJ / mol NP。在假定溶解生成NP溶液的NP超晶格固体为范德华固体的情况下，发现其隐含的熔化温度高得不切实际。然而，在相同的假设下，从数据中得到的粒子间势的最小值与先前提出的势的现象学模型相当吻合。虽然由于缺乏已知的NP超晶格固体的熔化温度而无法确定活度系数，但任何有限的熔化温度都意味着巨大的活度系数。斯卡查德-希尔德布兰德理论不能解释这些数据，因为数据外推到NP摩尔分数等于1时的负温度。然而，非常大的活度系数归因于NP体系的非常大的摩尔体积，这与该理论一致。
We present measurements of the temperature dependence of thermally reversible solubility for a nanoparticle (NP) suspension/solution. The NPs were gold with an average diameter of 5.5 nm, ligated with dodecanethiol. The solvent was a toluene–dodecanethiol mixture. Analysis of the temperature dependence yielded an enthalpy of dissolution of ΔHd = 20.9 kJ per mole NP. Under the assumption that the NP superlattice solid that dissolves to yield the NP solution is a van der Waals solid, the implied melting temperature was found to be unrealistically high. However, under the same assumption, the minimum of the interparticle potential derived from the data agreed fairly well with a previously presented phenomenological model for the potential. Although the activity coefficient could not be determined due to the lack of a known melting temperature for the NP superlattice solid, any finite melting temperature implied a huge activity coefficient. Scatchard–Hildebrand theory cannot explain the data because the data extrapolate to negative temperatures at a NP mole fraction equal to one. However, the very large activity coefficient was ascribed to the very large molar volume of the NP system, consistent with that theory.
金纳米粒子的溶解度与配体壳和烷烃溶剂的函数关系。
DOI：
10.1039/c2cp40645d
发表时间：
2012
期刊：
Physical chemistry chemical physics : PCCP
影响因子：
--
作者：
B. Lohman;J. Powell;S. Cingarapu;C. Aakeroy;A. Chakrabarti;K. Klabunde;B. Law;C. Sorensen
通讯作者：
C. Sorensen
2004/2005年南大洋印度洋区浮游动物群落空间分布
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
品川牧詩;堀本奈穂;石丸隆;喜多村稔;小達恒夫;平譯享
通讯作者：
平譯享
纳米晶超晶格在加热时表现出改善的有序性：逆熔化的一个例子？
影响因子：
3.4
作者：
Yixuan Yu;Avni Jain;Adrien Guillaussier;V. R. Voggu;Thomas M Truskett;Detlef;B. Korgel
通讯作者：
B. Korgel