最新刊期
卷 39 ， 期 1 ， 2018
- 摘要：Rare earth doped upconversion nanocrystals (RE-UCNCs) have attracted extensive interests due to their great potential applications in solar cells, near-infrared anticounterfei, bio-applications etc. However, these applications are limited by their lower upconvsersion luminescent strength/efficiency, and smaller absorption cross-section. The local electromagnetic field modulation on UCNCs is a powerful strategy to enhance the strength/efficiency of UCNCs. This review offered a comprehensive framework for metal/semiconductor plasmon-induced and photonic crystal effect induced upconversion enhancement. We first introduced the general interaction rules between the localized electromagnetic field in metal/semiconductor nanostructure/photonic crystals and UCNCs. Then, we summed up the recent published works on the local field modulation-induced upconversion enhancement. Finally, we did our best to discover the generality of obtaining highly improved photoluminescence for any emitters and the personality of realizing highly improved upconversion enhancement.关键词：upconversion nanocrystals;local field modulation;upconversion enhancement;metals/semiconductor;photonic crystal162|131|7更新时间：2022-09-21
- 摘要：Sensitive and specific biodetection of tumor markers is essential for early-stage cancer diagnosis and therapy, and will ultimately increase the patient survival rate. As a new generation of luminescent nano-bioprobes, trivalent lanthanide (Ln3+)-doped upconversion (UC) nanoparticles (NPs) possess exceptional properties such as near-infrared triggered anti-Stokes luminescence and long excited-state lifetime, and thus are considered to be the most promising alternative to conventional probes such as organic dyes, lanthanide chelates and quantum dots for early cancer theranostics. In this review, we provide a brief overview of the most recent advances in the development of Ln3+-doped UC nano-bioprobes, which covers from their chemical and physical fundamentals to biodetection including the controlled synthesis, surface modification, optical spectroscopy and their in-vitro UC luminescent bioassay of tumor markers. Some future prospects and challenges in this rapidly growing field are finally envisioned.关键词：lanthanide ion;upconversion;tumor maker;nanoparticle;bioassay131|84|0更新时间：2022-09-21
- 摘要：Upconversion nanoparticle (UCNP) following anti-Stokes principle is a novel type of luminescence materials, which possesses many unique merits such as high luminescence intensity, luminous stability, no background fluorescence, no bleaching, low toxicity and good biocompatibility. The infrared or near infrared excitation light endows UCNP with deep penetration in living tissues for potential applications in biomedical detection, diagnose and treatment. Magnetic resonance imaging (MRI), as one of the commonly used techniques in clinical, has many special advantages like high quality of soft tissue imaging, high spatial resolution, no radiation and no damage, which plays a significant role in diagnosis of cardiovascular and cerebrovascular diseases. In this review, we focus on the recent researches in regard to rare-earth upconversion nanomaterials for MRI diagnosis and application. The mechanism of magnetic resonance imaging, the construction of MRI contrast agents, and the design and synthesis of UCNP-based multi-functional nanomaterials for MRI diagnosis and disease therapy have been introduced in detail, on the other hand, by means of the relevant researches reported by our group, which are based on UCNP for medical MRI and multimodal imaging, the prospects of UCNP in the application of MRI have also been discussed in this review.关键词：upconversion nanoparticle;magnetic resonance imaging(MRI);multi-modality imaging;disease therapy172|90|4更新时间：2022-09-21
- 摘要：Due to its unique 4f electron configuration, the lanthanide upconversion fluorescence materials with special luminescence, magnetism properties have drawn considerable research attention in the world. Thereinto, the anti-Stokes upconversion luminescence property that can emit light in the field of UV to NIR region upon NIR laser also endow it with huge promising application potential in the field of fluorescence probe, bio-imaging, and fluorescence analysis. Recently, on account of big step of the development of the soft chemistry synthesis method, great progress of luminescence property and application of the lanthanide upconversion fluorescence materials have been made. Accordingly, in this work, we mainly focus on the recent research advances of the lanthanide upconversion luminescence modification and application in the field of bio-imaging and cancer therapy.关键词：lanthanide upconversion fluorescence materials;luminescence property;bio-imaging;cancer therapy168|106|11更新时间：2022-09-21
Themed Issue: Material and Application of Upconversion Luminescence
- 摘要：Upconversion nanoparticles can emit ultraviolet/visible/near-infrared light under near-infrared excitation, also known as anti-Stokes emission. This unique optical property precludes background fluorescence and light scattering from biological materials, which opens up new avenues for optical bio-applications, such as bioimaging, photodynamic treatment, drug delivery, etc. In order to achieve better application performance, highly efficient lanthanide upconversion nanoparticles is desired in many cases. Generally, the quality of the upconversion nanoparticles is always related to their synthetic methods. In this review, we will focus primarily on the various synthetic procedures for the upconversion nanoparticles. Moreover, several effective ways to obtain high luminescence efficiency are summarized.关键词：upconversion nanoparticles;synthetic methods;core-shell structure214|123|0更新时间：2022-09-21
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