Contemporary Synthesis of Ultrasmall (sub-10 nm) Upconverting Nanomaterials.,ChemistryOpen

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Contemporary Synthesis of Ultrasmall (sub-10 nm) Upconverting Nanomaterials.
ChemistryOpen ( IF 2.5 ) Pub Date : 2020-06-12 , DOI: 10.1002/open.202000073
Tanmaya Joshi ₁ , Constantin Mamat ₁ , Holger Stephan ₁

Affiliation

Due to their unique photophysical properties, upconverting nanoparticles (UCNPs), i. e. particles capable of converting near‐infrared (NIR) photons into tunable emissions in the range of ultraviolet (UV) to NIR, have great potential for use in various biomedical fields such as bioimaging, photodynamic therapy and bioanalytical applications. As far as biomedical applications are concerned, these materials have a number of advantageous properties such as brilliant luminescence and exceptional photostability. Very small “stealth” particles (sub‐10 nm), which can circulate in the body largely undetected by the immune system, are particularly important for in vivo use. The fabrication of such particles, which simultaneously have a defined (ultrasmall) size and the required optical properties, is a great challenge and an area that is in its infancy. This minireview provides a concise overview of recent developments on appropriate synthetic methodologies to produce such UCNPs. Particular attention was given to the influence of both surfactants and dopants used to precisely adjust size, crystalline phase and optical properties of UCNPs.

中文翻译：

超小（亚 10 nm）上转换纳米材料的当代合成。

由于其独特的光物理特性，上转换纳米粒子（UCNP），即。e. 能够将近红外（NIR）光子转换为紫外（UV）至近红外范围内的可调发射的粒子，在生物成像、光动力治疗和生物分析应用等各种生物医学领域具有巨大的应用潜力。就生物医学应用而言，这些材料具有许多有利的特性，例如明亮的发光性和出色的光稳定性。非常小的“隐形”颗粒（亚 10 nm）可以在体内循环，基本上不会被免疫系统检测到，对于体内使用尤其重要。制造这种同时具有限定（超小）尺寸和所需光学特性的颗粒是一个巨大的挑战，也是一个处于起步阶段的领域。本小型综述简要概述了生产此类 UCNP 的适当合成方法的最新进展。特别关注用于精确调节 UCNP 尺寸、晶相和光学性质的表面活性剂和掺杂剂的影响。

更新日期：2020-06-12

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