Wang He-Fang, Chen Xi, Feng Fan, Ji Xia, Zhang Ye
Research Center for Analytical Sciences , College of Chemistry , Nankai University , Tianjin Key Laboratory of Biosensing and Molecular Recognition , State Key Laboratory of Medicinal Chemical Biology , Tianjin 300071 , China . Email:
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071 , China.
Chem Sci. 2018 Nov 12;9(48):8923-8929. doi: 10.1039/c8sc04173c. eCollection 2018 Dec 28.
Traps, size and aqueous-dispersibility are the most important parameters that affect the features and applications of persistent luminescent nanoparticles (PLNPs). However, simultaneous controlling of these parameters is rather difficult and has not been reported yet. We present the first exploration on adjusting the traps, size and aqueous-dispersibility of PLNPs simple ethylenediaminetetraacetate (EDTA) etching. Cr :ZnGaO (ZGO) was used as the PLNP model. EDTA etching of the sintered ZGO results in effective reduction of the size and great improvement in the aqueous-dispersibility. In addition, EDTA etching alters the density of mediate traps and generates new deep traps, thus achieving the massive production of (ultra)small ZGO-EDTA with fine aqueous-dispersibility, suitable mediate/deep traps and superlong bright afterglows (51 days). As EDTA can interact with most metals, this simple EDTA etching strategy is prospectively amenable to other PLNPs, and the resulting PLNPs-EDTA have wide applications in both biological field and information storage.
陷阱、尺寸和水分散性是影响持久性发光纳米粒子（PLNPs）特性和应用的最重要参数。然而，同时控制这些参数相当困难，目前尚未见报道。我们首次探索了通过简单的乙二胺四乙酸（EDTA）蚀刻来调节PLNPs的陷阱、尺寸和水分散性。以Cr:ZnGaO（ZGO）作为PLNP模型。对烧结后的ZGO进行EDTA蚀刻可有效减小尺寸并显著提高水分散性。此外，EDTA蚀刻改变了中间陷阱的密度并产生了新的深陷阱，从而实现了大量生产具有良好水分散性、合适的中间/深陷阱和超长余辉（51天）的（超）小ZGO-EDTA。由于EDTA能与大多数金属相互作用，这种简单的EDTA蚀刻策略有望适用于其他PLNPs，所得的PLNPs-EDTA在生物领域和信息存储方面都有广泛应用。
