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首页> 外文期刊>Crystal growth & design >Templating the nucleation of calcium oxalate monohydrate via micropatterned self-assembled. monolayers on gold
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Templating the nucleation of calcium oxalate monohydrate via micropatterned self-assembled. monolayers on gold

机译：通过微模式自组装，对一水草酸钙的成核进行模板化。黄金单层

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摘要

Controlling both the nucleation and the growth of crystalline materials requires the confinement of a space wherein nucleation is induced and necessitates transport of ions to the newly formed nucleus. Micropatterned self-assembled monolayers (mu P SAMs) of alkanethiolates on gold have been used at length to mimic natural organic templates as they are a facile way to create spatially constrained microenvironments for nucleation and consequently control ion flow to active nucleation sites. Here, we present,mu P SAMs of omega-functionalized alkanethiolates on gold as effective templating agents for the nucleation of calcium oxalate monohydrate (COM). COM crystals nucleate on carboxyl- and hydroxyl-terminated mu P SAMs at a critical ion concentration regardless of growth solution pH. Mixed mu P SAMs of mercaptohexadecane (MHD) and mercaptohexadecanoic acid (MHA) nucleated lower densities of COM while decreasing average crystal size. Shortening SAM chain length from MHA to mercaptoundecanoic acid (MUA) nucleated fewer COM crystals with poorly defined faces, while mu P hydroxyl-terminated SAMs both lowered the nucleation density and increased the size of the COM crystals.
机译：控制晶体材料的成核和生长都需要限制诱导成核的空间，并且必须将离子运输到新形成的核。金上的链烷硫醇盐的微图案自组装单分子层（mu P SAMs）已被广泛用于模拟天然有机模板，因为它们是创建空间受限的微环境成核并因此控制离子流向活性成核位置的便捷方法。在这里，我们介绍了在黄金上的ω-官能化链烷硫醇盐的μP SAMs，它们是有效的模板剂，用于草酸钙一水合物（COM）的成核。不管生长溶液的pH值如何，COM晶体都以临界离子浓度在羧基和羟基封端的mu P SAM上成核。巯基十六烷（MHD）和巯基十六烷酸（MHA）的混合mu P SAM使较低的COM密度成核，同时减小了平均晶体尺寸。将SAM链从MHA缩短为巯基十一烷酸（MUA），可以使较少的COM晶体形貌不清，而mu P羟基封端的SAM既降低了成核密度，又增加了COM晶体的尺寸。

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