Quantitative Analysis of Calcium Phosphate Nanocluster Growth Using Time-of-Flight Medium-Energy-Ion-Scattering Spectroscopy,ACS Central Science

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Quantitative Analysis of Calcium Phosphate Nanocluster Growth Using Time-of-Flight Medium-Energy-Ion-Scattering Spectroscopy
ACS Central Science ( IF 12.7 ) Pub Date : 2018-08-30 00:00:00 , DOI: 10.1021/acscentsci.8b00436
Jimin Park _{1,

2} , Ki Dong Yang ₁ , Na-Young Kim ₃ , Kang-Won Jung ₄ , Viet-Duc Le ₃ , Hee-Jin Lim ₄ , Junghyun An ₁ , Kyoungsuk Jin ₁ , Yong-Hyun Kim ₃ , Ki Tae Nam ₁ , DaeWon Moon ₄

Affiliation

One of the remaining challenges in material chemistry is to unveil the quantitative compositional/structural information and thermodynamic nature of inorganic materials especially in the initial nucleation and growth step. In this report, we adopted newly developed time-of-flight medium-energy-ion-scattering (TOF-MEIS) spectroscopy to address this challenge and explored heterogeneously grown nanometer-sized calcium phosphate as a model system. With TOF-MEIS, we discovered the existence of calcium-rich nanoclusters (Ca/P ∼ 3) in the presence of the non-collagenous-protein-mimicking passivating ligands. Over the reaction, these clusters progressively changed their compositional ratio toward that of a bulk phase (Ca/P ∼ 1.67) with a concurrent increase in their size to ∼2 nm. First-principles studies suggested that the calcium-rich nanoclusters can be stabilized through specific interactions between the ligands and clusters, emphasizing the important role of template on guiding the chemical and thermodynamic nature of inorganic materials at the nanoscale.

中文翻译：

使用飞行时间介质能量离子散射光谱对磷酸钙纳米簇生长进行定量分析

材料化学中的剩余挑战之一是揭示无机材料的定量组成/结构信息和热力学性质，尤其是在初始成核和生长步骤中。在本报告中，我们采用了新开发的飞行时间中能量离子散射（TOF-MEIS）光谱技术来应对这一挑战，并探索了异质生长的纳米级磷酸钙作为模型系统。利用TOF-MEIS，我们发现了在模拟非胶原蛋白的钝化配体存在下，富含钙的纳米团簇（Ca / P〜3）的存在。在整个反应过程中，这些团簇的组成比逐渐向本体相（Ca / P约为1.67）变化，同时尺寸增大至约2 nm。

更新日期：2018-08-30

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