Toward industrial scale synthesis of ultrapure singlet nanoparticles with controllable sizes in a continuous gas-phase process.
Toward industrial scale synthesis of ultrapure singlet nanoparticles with controllable sizes in a continuous gas-phase process.
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DOI：
10.1038/srep15788
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发表时间：
2015-10-29
影响因子：
4.6
通讯作者：
Schmidt-Ott A
中科院分区：
文献类型：
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作者：
Feng J;Biskos G;Schmidt-Ott A
纳米颗粒的连续气相合成与快速团聚相关，这可能是许多应用的限制因素。在这份报告中，我们通过提供实验证据来支持气相方法可用于生产在室温下具有可调尺寸的超纯非团聚“单线态”纳米颗粒，从而挑战这种范式。通过控制颗粒生长区中的温度以保证碰撞实体的完全聚结，原则上可以将单线态的尺寸从单个原子的尺寸调节到任何期望的值。我们评估我们的结果的背景下，一个简单的分析模型，探索单重态大小的依赖性的操作条件。该模型与实验测量的协议表明，这些方法可以有效地用于生产单，可以进一步处理许多替代方法。结合火花烧蚀所能实现的放大和无限混合的能力，这项研究提供了一个易于使用的概念，用于生产先进材料的低成本工业规模纳米纤维的关键构件。
Continuous gas-phase synthesis of nanoparticles is associated with rapid agglomeration, which can be a limiting factor for numerous applications. In this report, we challenge this paradigm by providing experimental evidence to support that gas-phase methods can be used to produce ultrapure non-agglomerated “singlet” nanoparticles having tunable sizes at room temperature. By controlling the temperature in the particle growth zone to guarantee complete coalescence of colliding entities, the size of singlets in principle can be regulated from that of single atoms to any desired value. We assess our results in the context of a simple analytical model to explore the dependence of singlet size on the operating conditions. Agreement of the model with experimental measurements shows that these methods can be effectively used for producing singlets that can be processed further by many alternative approaches. Combined with the capabilities of up-scaling and unlimited mixing that spark ablation enables, this study provides an easy-to-use concept for producing the key building blocks for low-cost industrial-scale nanofabrication of advanced materials.