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首页> 外文期刊>Chemistry: A European journal >Microwave-assisted seeded growth of lanthanide-based nanoparticles for imaging and therapy
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Microwave-assisted seeded growth of lanthanide-based nanoparticles for imaging and therapy

机译：微波辅助镧系元素纳米粒子的种子生长，用于成像和治疗

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摘要

A facile, highly reproducible method for the preparation of Ln-based NPs with predefined diameters in the range of 20 to 200 nm was reported. A defined amount of the obtained dispersion was added directly to an aqueous solution of urea and the corresponding lanthanide chloride. Finally, this mixture was heated in a microwave oven to induce hydrolysis of the urea, resulting in formation of ammonium carbonate. As soon as the solubility product was reached, poorly soluble lanthanide(III) carbonate precipitated, initiating the growth of the present nuclei. By adjusting temperature and time the size of the obtained particles was easily tunable. When the desired size was reached, the precipitation was quenched by rapid cooling, followed by removal of the remaining Ln ~(III) salts and urea through dialysis. The constant growth rate suggests that the seeds grow uniformly and dynamic light scattering (DLS) experiments indicate that no new crystal nuclei are formed during this process.
机译：报道了一种简便，高度可重复的方法，用于制备预定义直径在20至200 nm范围内的基于Ln的NP。将确定量的所得分散体直接添加至尿素和相应的氯化镧系元素的水溶液中。最后，将该混合物在微波炉中加热以引起尿素的水解，导致形成碳酸铵。一旦达到溶解度产物，难溶的碳酸镧系元素（III）就会沉淀，从而引发本核的生长。通过调节温度和时间，可以容易地调节所得颗粒的尺寸。当达到所需大小时，通过快速冷却将沉淀淬灭，然后通过透析除去剩余的Ln〜（III）盐和尿素。恒定的生长速率表明种子均匀生长，动态光散射（DLS）实验表明在此过程中没有形成新的晶核。

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